Merge remote-tracking branch 'origin/master'

# Conflicts:
#	WebFrontEnd/smartcoach-frontend/package-lock.json
#	WebFrontEnd/smartcoach-frontend/package.json

.idea/2021-049.iml

@@ -5,6 +5,8 @@
       <excludeFolder url="file://$MODULE_DIR$/temp" />
       <excludeFolder url="file://$MODULE_DIR$/.tmp" />
       <excludeFolder url="file://$MODULE_DIR$/tmp" />
+      <excludeFolder url="file://$MODULE_DIR$/MobileFrontEnd/FlutterApplication/flutter_app/.pub" />
+      <excludeFolder url="file://$MODULE_DIR$/MobileFrontEnd/FlutterApplication/flutter_app/build" />
     </content>
     <orderEntry type="inheritedJdk" />
     <orderEntry type="sourceFolder" forTests="false" />

BackEnd/WebBackEnd/config.js

+module.exports = {
+    mongoURI: 'mongodb+srv://admin:admin@cluster0.wmb3b.mongodb.net/SmartCoach?retryWrites=true&w=majority',
+};

BackEnd/WebBackEnd/models/answer.model.js

+const mongoose = require('mongoose');
+const Schema = mongoose.Schema;
+
+let Answer = new Schema({
+    answer_id: mongoose.Schema.Types.ObjectId,
+
+    student_id: {
+        type: String
+    },
+    student_name:{
+        type:String
+    },
+    lesson_no:{
+        type:Number
+    },
+    no_of_questions:{
+        type:Number
+    },
+    question_text:{
+        type:String
+    },
+    question_answer:{
+        type:String
+    },
+    defult_mark:{
+        type:Number
+    }
+});
+
+module.exports = mongoose.model('Answer',Answer);
\ No newline at end of file

BackEnd/WebBackEnd/models/pdf.model.js

+const mongoose = require('mongoose');
+const Schema = mongoose.Schema;
+
+const ImageSchema = new Schema({
+    caption: {
+        required: true,
+        type: String,
+    },
+    lessonname: {
+        required: true,
+        type: String,
+    },
+    lessonno: {
+        required: true,
+        type: String,
+    },
+    filename: {
+        required: true,
+        type: String,
+    },
+    fileId: {
+        required: true,
+        type: String,
+    },
+    createdAt: {
+        default: Date.now(),
+        type: Date,
+    },
+});
+
+const Image = mongoose.model('Image', ImageSchema);
+
+module.exports = Image;
\ No newline at end of file

BackEnd/WebBackEnd/models/question.model.js

@@ -4,10 +4,10 @@ const Schema = mongoose.Schema;
 let Question = new Schema({
     question_id: mongoose.Schema.Types.ObjectId,
 
-    category:{
-        type:String
+    lesson_no:{
+        type:Number
     },
-    name:{
+    lesson_name:{
         type:String
     },
     question_text:{
@@ -17,10 +17,7 @@ let Question = new Schema({
         type:String
     },
     defult_mark:{
-        type: Number
-    },
-    q_type:{
-        type: String
+        type:Number
     },
     time_createdby:{
         type: Date

BackEnd/WebBackEnd/models/studPer.model.js

+const mongoose = require('mongoose');
+const Schema = mongoose.Schema;
+
+let PerformanceSchema = new Schema({
+    student_id : {type:mongoose.Schema.Types.ObjectId,ref: 'student', required:true},
+    sex : {type:Boolean, required:true},
+    study_time : {type: Number, required:true},
+    activities : {type: Boolean, required:true},
+    internet : {type: Boolean, required:true},
+    free_time : {type: Number, required:true},
+    absences : {type: Number, required:true},
+    g1 : {type: Number, required:true},
+    g2 : {type: Number, required:true}
+},{
+    timestamps : true
+});
+
+const StudPerf = mongoose.model('stud_performance', PerformanceSchema);
+
+module.exports = StudPerf;
\ No newline at end of file

BackEnd/WebBackEnd/package.json

@@ -10,14 +10,12 @@
   "author": "",
   "license": "ISC",
   "dependencies": {
-    "axios": "^0.21.4",
     "cors": "^2.8.5",
     "dotenv": "^10.0.0",
     "express": "^4.17.1",
     "mongoose": "^5.12.15"
   },
   "devDependencies": {
-    "nodemailer": "^6.6.2",
-    "request": "^2.88.2"
+    "nodemailer": "^6.6.2"
   }
 }

BackEnd/WebBackEnd/routes/answer_route.js

+const answerRoute = require('express').Router();
+let answer = require('../models/answer.model');
+const mongoose = require('mongoose');
+
+answerRoute.route('/').get(function(req, res) {
+    answer.find(function(err, questions) {
+        if (err) {
+            console.log(err);
+            res.render('index');
+        } else {
+            res.json(questions);
+        }
+    });
+});
+
+
+answerRoute.route('/:id').get(function (req, res) {
+    let id = req.params.id;
+    answer.findById(id, function (err, question) {
+        res.json(question);
+    });
+});
+
+answerRoute.route('/questionId/:id').get(function (req, res) {
+    console.log("Question ID");
+    console.log(req.params.id);
+    let id = req.params.id;
+    answer.find({"_id" : id}, function (err, question) {
+        res.json(question);
+    });
+});
+
+answerRoute.route('/add').post(function(req, res) {
+    const ans = new answer({
+        answer_id: new mongoose.Types.ObjectId(),
+        student_id : req.body.student_id,
+        student_name :  req.body.student_name,
+        lesson_no : req.body.lesson_no,
+        no_of_questions : req.body.no_of_questions,
+        question_text:  req.body.question_text,
+        question_answer:req.body.question_answer,
+        defult_mark:  req.body.defult_mark,
+    });
+    ans.save().then(ans =>{
+        res.json('Item update!');
+    })
+        .catch(err =>{
+            res.status(400).send("Update not possible");
+        });
+});
+
+answerRoute.route('/update/:id').post((req, res) => {
+    answer.findById(req.params.id,function(err, answer){
+        if(!answer)
+            req.status(404).send("data is not found");
+        else {
+            answer.lesson_no = req.body.lesson_no,
+            answer.student_id = req.body.student_id,
+            answer.student_name =  req.body.student_name,
+            answer.no_of_questions = req.body.no_of_questions,
+            answer.question_text =  req.body.question_text,
+            answer.question_answer = req.body.question_answer,
+            answer.defult_mark =  req.body.defult_mark
+        }
+        answer.save().then(answer =>{
+            res.json('Item update!');
+        })
+            .catch(err =>{
+                res.status(400).send("Update not possible");
+            });
+    });
+});
+
+answerRoute.route('/lessonNo/:id').get(function (req, res) {
+    console.log("Product Item ID");
+    console.log(req.params.id);
+    let id = req.params.id;
+    answer.find({"lesson_no" : id}, function (err, answer) {
+        res.json(answer);
+    });
+});
+
+answerRoute.route('/delete/:id').delete((req, res) => {
+    answer.findByIdAndDelete(req.params.id)
+        .then(() => res.json('Product Deleted.'))
+        .catch(err => res.status(400).json('Error: ' + err));
+});
+
+module.exports = answerRoute;
\ No newline at end of file

BackEnd/WebBackEnd/routes/pdf.route.js

+const express = require('express');
+const imageRouter = express.Router();
+const mongoose = require('mongoose');
+const Image = require('../models/pdf.model');
+const config = require('../config');
+
+module.exports = (upload) => {
+    const url = config.mongoURI;
+    const connect = mongoose.createConnection(url, {useNewUrlParser: true, useUnifiedTopology: true});
+
+    let gfs;
+
+    connect.once('open', () => {
+        // initialize stream
+        gfs = new mongoose.mongo.GridFSBucket(connect.db, {
+            bucketName: "uploads"
+        });
+    });
+
+    /*
+        POST: Upload a single image/file to Image collection
+    */
+    imageRouter.route('/')
+        .post(upload.single('file'), (req, res, next) => {
+            console.log(req.body);
+            // check for existing images
+            Image.findOne({caption: req.body.caption})
+                .then((image) => {
+                    console.log(image);
+                    if (image) {
+                        return res.status(200).json({
+                            success: false,
+                            message: 'Image already exists',
+                        });
+                    }
+
+                    let newImage = new Image({
+                        lessonname: req.body.lessonname,
+                        lessonno: req.body.lessonno,
+                        caption: req.body.caption,
+                        filename: req.file.filename,
+                        fileId: req.file.id,
+                    });
+
+                    newImage.save()
+                        .then((image) => {
+
+                            res.status(200).json({
+                                success: true,
+                                image,
+                            });
+                        })
+                        .catch(err => res.status(500).json(err));
+                })
+                .catch(err => res.status(500).json(err));
+        })
+        .get((req, res, next) => {
+            Image.find({})
+                .then(images => {
+                    res.status(200).json({
+                        success: true,
+                        images,
+                    });
+                })
+                .catch(err => res.status(500).json(err));
+        });
+    /*
+        GET: Delete an image from the collection
+    */
+    imageRouter.route('/delete/:id')
+        .get((req, res, next) => {
+            Image.findOne({_id: req.params.id})
+                .then((image) => {
+                    if (image) {
+                        Image.deleteOne({_id: req.params.id})
+                            .then(() => {
+                                return res.status(200).json({
+                                    success: true,
+                                    message: `File with ID: ${req.params.id} deleted`,
+                                });
+                            })
+                            .catch(err => {
+                                return res.status(500).json(err)
+                            });
+                    } else {
+                        res.status(200).json({
+                            success: false,
+                            message: `File with ID: ${req.params.id} not found`,
+                        });
+                    }
+                })
+                .catch(err => res.status(500).json(err));
+        });
+
+    /*
+        GET: Fetch most recently added record
+    */
+    imageRouter.route('/recent')
+        .get((req, res, next) => {
+            Image.findOne({}, {}, {sort: {'_id': -1}})
+                .then((image) => {
+                    res.status(200).json({
+                        success: true,
+                        image,
+                    });
+                })
+                .catch(err => res.status(500).json(err));
+        });
+
+    /*
+        POST: Upload multiple files upto 3
+    */
+    imageRouter.route('/multiple')
+        .post(upload.array('file', 3), (req, res, next) => {
+            res.status(200).json({
+                success: true,
+                message: `${req.files.length} files uploaded successfully`,
+            });
+        });
+    /*
+        GET: Fetches all the files in the uploads collection
+    */
+    imageRouter.route('/')
+        .get((req, res, next) => {
+            gfs.find().toArray((err, files) => {
+                if (!files || files.length === 0) {
+                    return res.status(200).json({
+                        success: false,
+                        message: 'No files available'
+                    });
+                }
+
+                files.map(file => {
+                    if (file.contentType === 'image/jpeg' || file.contentType === 'image/png' || file.contentType === 'image/svg') {
+                        file.isImage = true;
+                    } else {
+                        file.isImage = false;
+                    }
+                });
+
+                res.status(200).json({
+                    success: true,
+                    files,
+                });
+            });
+        });
+
+    /*
+        GET: Fetches a particular file by filename
+    */
+    imageRouter.route('/file/:filename')
+        .get((req, res, next) => {
+            gfs.find({ filename: req.params.filename }).toArray((err, files) => {
+                if (!files[0] || files.length === 0) {
+                    return res.status(200).json({
+                        success: false,
+                        message: 'No files available',
+                    });
+                }
+
+                res.status(200).json({
+                    success: true,
+                    file: files[0],
+                });
+            });
+        });
+
+    /*
+        GET: Fetches a particular image and render on browser
+    */
+    imageRouter.route('/image/:filename')
+        .get((req, res, next) => {
+            gfs.find({ filename: req.params.filename }).toArray((err, files) => {
+                if (!files[0] || files.length === 0) {
+                    return res.status(200).json({
+                        success: false,
+                        message: 'No files available',
+                    });
+                }
+
+                if (files[0].contentType === 'image/jpeg' || files[0].contentType === 'image/png' || files[0].contentType === 'image/svg+xml') {
+                    // render image to browser
+                    gfs.openDownloadStreamByName(req.params.filename).pipe(res);
+                } else {
+                    res.status(404).json({
+                        err: 'Not an image',
+                    });
+                }
+            });
+        });
+
+    /*
+    GET: Fetches a particular PDF and render on browser
+*/
+    imageRouter.route('/pdf/:filename')
+        .get((req, res, next) => {
+            gfs.find({ filename: req.params.filename }).toArray((err, files) => {
+                if (!files[0] || files.length === 0) {
+                    return res.status(200).json({
+                        success: false,
+                        message: 'No files available',
+                    });
+                }
+
+                if (files[0].contentType === 'application/pdf' || files[0].contentType === 'application/vnd.ms-powerpoint'|| files[0].contentType === 'application/vnd.openxmlformats-officedocument.presentationml.presentation') {
+                    // render PDF to browser
+                    gfs.openDownloadStreamByName(req.params.filename).pipe(res);
+                } else {
+                    res.status(404).json({
+                        err: 'Not a PDF',
+                    });
+                }
+            });
+        });
+
+    /*
+        DELETE: Delete a particular file by an ID
+    */
+    imageRouter.route('/file/del/:id')
+        .post((req, res, next) => {
+            console.log(req.params.id);
+            gfs.delete(new mongoose.Types.ObjectId(req.params.id), (err, data) => {
+                if (err) {
+                    return res.status(404).json({ err: err });
+                }
+
+                res.status(200).json({
+                    success: true,
+                    message: `File with ID ${req.params.id} is deleted`,
+                });
+            });
+        });
+    return imageRouter;
+};
\ No newline at end of file

BackEnd/WebBackEnd/routes/question.route.js

@@ -13,6 +13,7 @@ questionRouter.route('/').get(function(req, res) {
     });
 });
 
+
 questionRouter.route('/:id').get(function (req, res) {
     let id = req.params.id;
     Question.findById(id, function (err, question) {
@@ -32,43 +33,20 @@ questionRouter.route('/questionId/:id').get(function (req, res) {
 questionRouter.route('/add').post(function(req, res) {
     const question = new Question({
         question_id: new mongoose.Types.ObjectId(),
-        category : req.body.category,
-        name : req.body.name,
+        lesson_no : req.body.lesson_no,
+        lesson_name : req.body.lesson_name,
         question_text:  req.body.question_text,
         question_answer:req.body.question_answer,
         defult_mark:  req.body.defult_mark,
-        q_type:  req.body.q_type,
         time_createdby:  req.body.time_createdby,
         time_modifiedby: req.body.time_modifiedby,
         general_feedback: req.body.general_feedback
     });
-    question
-        .save()
-        .then(result => {
-            res.json(result);
-            console.log(result);
-            res.status(201).json({
-                message: "Created product successfully",
-                createdProduct: {
-                    category:  result.category,
-                    name: result.name,
-                    question_text:  result.question_text,
-                    defult_mark:  result.defult_mark,
-                    q_type:  result.q_type,
-                    time_createdby:  req.body.time_createdby,
-                    time_modifiedby:  req.body.time_modifiedby,
-                    general_feedback: req.body.general_feedback,
-                    question_id: result.question_id,
-                    request: {
-                        type: 'GET',
-                        url: "http://localhost:5000/questions/" + result._id
-                    }
-                }
-            });
-        })
-        .catch(err => {
-            console.log(err);
-            res.status(500).json({error: err});
+    question.save().then(question =>{
+        res.json('Item update!');
+    })
+        .catch(err =>{
+            res.status(400).send("Update not possible");
         });
 });
 
@@ -77,8 +55,8 @@ questionRouter.route('/update/:id').post((req, res) => {
         if(!question)
             req.status(404).send("data is not found");
         else {
-            question.category = req.body.category;
-            question.name = req.body.name;
+            question.lesson_no = req.body.lesson_no;
+            question.lesson_name = req.body.lesson_name;
             question.question_text = req.body.question_text;
             question.question_answer = req.body.question_answer;
             question.defult_mark = req.body.defult_mark;
@@ -96,7 +74,14 @@ questionRouter.route('/update/:id').post((req, res) => {
     });
 });
 
-
+questionRouter.route('c').get(function (req, res) {
+    console.log("Product Item ID");
+    console.log(req.params.id);
+    let id = req.params.id;
+    Question.find({"lesson_no" : id}, function (err, product) {
+        res.json(product);
+    });
+});
 
 questionRouter.route('/delete/:id').delete((req, res) => {
     Question.findByIdAndDelete(req.params.id)

BackEnd/WebBackEnd/routes/studper.route.js

+const router = require('express').Router();
+const StudPer = require('../models/studPer.model');
+
+router.route('/store').post((req ,res) =>{
+    const student_id = req.body.student_id;
+    const sex = req.body.sex;
+    const study_time = req.body.study_time;
+    const activities = req.body.activities;
+    const internet = req.body.internet;
+    const free_time = req.body.free_time;
+    const absences = req.body.absences;
+    const g1 = req.body.g1;
+    const g2 = req.body.g2;
+
+    const newPerformanceDetails = new StudPer({
+        student_id,
+        sex,
+        study_time,
+        activities,
+        internet,
+        free_time,
+        absences,
+        g1,
+        g2
+    });
+
+    newPerformanceDetails.save()
+        .then(()=> res.json('Student Performance Details Added!'))
+        .catch(err => res.status(400).json('Error :'+err));
+});
+
+module.exports = router;
\ No newline at end of file

BackEnd/WebBackEnd/server.js

+const createError = require('http-errors');
 const express = require('express');
+const path = require('path');
+const cookieParser = require('cookie-parser');
+const logger = require('morgan');
+const methodOverride = require('method-override');
+const config = require('./config');
+const multer = require('multer');
+const {GridFsStorage} = require('multer-gridfs-storage');
+const crypto = require('crypto');
 const  cors = require('cors');
 const  bodyParser = require('body-parser');
 const mongoose =require('mongoose');
 require('dotenv').config();
 const app = express();
-const port = process.env.PORT || 5001;
+const port = process.env.PORT || 5000;
+
 
 app.use(bodyParser.urlencoded({ extended: true }));
 
-app.use(cors());
+// view engine setup
+app.set('views', path.join(__dirname, 'views'));
+app.set('view engine', 'jade');
+
+app.use(cors({
+    origin: '*',
+}));
+app.use(logger('dev'));
 app.use(express.json());
+app.use(express.urlencoded({ extended: false }));
+app.use(cookieParser());
+app.use(methodOverride('_method'));
+app.use(express.static(path.join(__dirname, 'public')));
+
+mongoose.Promise = require('bluebird');
 
-const uri = process.env.ATLAS_URI;
-mongoose.connect(uri,{useNewUrlParser:true, useUnifiedTopology: true, useCreateIndex:true, useFindAndModify: false });
+const url = config.mongoURI;
+const connect = mongoose.connect(url, { useNewUrlParser:true, useUnifiedTopology: true, useCreateIndex:true, useFindAndModify: false });
 
-const connection = mongoose.connection;
-connection.once('open',() => {
-    console.log("MongoDB database connection established successfully");
-}).catch(err => {
-    console.error('App starting error:', err.stack);
-    process.exit(1);
+connect.then(() => {
+    console.log('Connected to database: GridApp');
+}, (err) => console.log(err));
+
+// create storage engine
+const storage = new GridFsStorage({
+    url: config.mongoURI,
+    file: (req, file) => {
+        return new Promise((resolve, reject) => {
+            crypto.randomBytes(16, (err, buf) => {
+                if (err) {
+                    return reject(err);
+                }
+                const filename = buf.toString('hex') + path.extname(file.originalname);
+                const fileInfo = {
+                    filename: filename,
+                    bucketName: 'uploads'
+                };
+                resolve(fileInfo);
+            });
+        });
+    }
 });
 
+const upload = multer({ storage });
+
+
+// const connection = mongoose.connection;
+// connection.once('open',() => {
+//     console.log("MongoDB database connection established successfully");
+// }).catch(err => {
+//     console.error('App starting error:', err.stack);
+//     process.exit(1);
+// });
+
+
+
 const studentRouter = require('./routes/student.route');
 const tutorRouter = require('./routes/tutor.route');
 const instituteRouter = require('./routes/institute.route');
@@ -32,17 +84,20 @@ const studentResult = require('./routes/studentALResult.route');
 const tutorRating = require('./routes/tutorRatings.route');
 const filteredList = require('./routes/filteredListNew.route');
 const createClassRoute = require('./routes/createClass.route');
+const studPerRoute = require('./routes/studper.route');
 
 app.use('/studentSingUp',studentRouter);
 app.use('/tutorSingUp',tutorRouter);
 app.use('/instituteSingUp',instituteRouter);
 app.use('/userAccount',userAccount);
 app.use('/questions', questionManage);
+app.use('/answer', answerManage);
 app.use('/admin/finance', financeRouter);
 app.use('/studentResults', studentResult);
 app.use('/tutorRatings', tutorRating);
 app.use('/filteredList', filteredList);
 app.use('/createClass', createClassRoute);
+app.use('/admin/studper',studPerRoute);
 
 app.listen(port, () => {
     console.log(`Server is running on Port: ${port}`);

ELearningApp/.gitignore

+*.iml
+.gradle
+/local.properties
+/.idea/caches
+/.idea/libraries
+/.idea/modules.xml
+/.idea/workspace.xml
+/.idea/navEditor.xml
+/.idea/assetWizardSettings.xml
+.DS_Store
+/build
+/captures
+.externalNativeBuild
+.cxx
+local.properties

ELearningApp/.idea/.gitignore

+# Default ignored files
+/shelf/
+/workspace.xml

ELearningApp/.idea/compiler.xml

+<?xml version="1.0" encoding="UTF-8"?>
+<project version="4">
+  <component name="CompilerConfiguration">
+    <bytecodeTargetLevel target="11" />
+  </component>
+</project>
\ No newline at end of file

ELearningApp/.idea/gradle.xml

+<?xml version="1.0" encoding="UTF-8"?>
+<project version="4">
+  <component name="GradleMigrationSettings" migrationVersion="1" />
+  <component name="GradleSettings">
+    <option name="linkedExternalProjectsSettings">
+      <GradleProjectSettings>
+        <option name="testRunner" value="GRADLE" />
+        <option name="distributionType" value="DEFAULT_WRAPPED" />
+        <option name="externalProjectPath" value="$PROJECT_DIR$" />
+        <option name="modules">
+          <set>
+            <option value="$PROJECT_DIR$" />
+            <option value="$PROJECT_DIR$/app" />
+          </set>
+        </option>
+        <option name="resolveModulePerSourceSet" value="false" />
+      </GradleProjectSettings>
+    </option>
+  </component>
+</project>
\ No newline at end of file

ELearningApp/.idea/misc.xml

+<?xml version="1.0" encoding="UTF-8"?>
+<project version="4">
+  <component name="DesignSurface">
+    <option name="filePathToZoomLevelMap">
+      <map>
+        <entry key="../../Android/Sdk/platforms/android-30/data/res/layout/simple_list_item_1.xml" value="0.3677536231884058" />
+        <entry key="..\:/Users/HANSAKA/Desktop/Research Development/ELearningApp/app/src/main/res/layout/activity_attendence.xml" value="0.1802536231884058" />
+        <entry key="app/src/main/res/drawable-v24/grey_back_curved.xml" value="0.434375" />
+        <entry key="app/src/main/res/drawable-v24/ic_launcher_foreground.xml" value="0.2557291666666667" />
+        <entry key="app/src/main/res/drawable-v24/white_curved.xml" value="0.2557291666666667" />
+        <entry key="app/src/main/res/drawable/darkgrey_back_curved.xml" value="0.434375" />
+        <entry key="app/src/main/res/drawable/ic_launcher_background.xml" value="0.2557291666666667" />
+        <entry key="app/src/main/res/drawable/ic_launcher_bg.xml" value="0.2557291666666667" />
+        <entry key="app/src/main/res/drawable/list_item.xml" value="0.2557291666666667" />
+        <entry key="app/src/main/res/layout/activity_attendence.xml" value="0.3061594202898551" />
+        <entry key="app/src/main/res/layout/activity_class_add.xml" value="0.3555253623188406" />
+        <entry key="app/src/main/res/layout/activity_class_detail_activty.xml" value="0.23958333333333334" />
+        <entry key="app/src/main/res/layout/activity_class_edit.xml" value="0.3555253623188406" />
+        <entry key="app/src/main/res/layout/activity_home.xml" value="0.2866847826086957" />
+        <entry key="app/src/main/res/layout/activity_join.xml" value="0.3333333333333333" />
+        <entry key="app/src/main/res/layout/activity_login.xml" value="0.23958333333333334" />
+        <entry key="app/src/main/res/layout/activity_main.xml" value="0.2848731884057971" />
+        <entry key="app/src/main/res/layout/activity_student_list.xml" value="0.3677536231884058" />
+        <entry key="app/src/main/res/layout/activity_timer.xml" value="0.3759057971014493" />
+        <entry key="app/src/main/res/layout/activity_tutor_join.xml" value="0.3759057971014493" />
+        <entry key="app/src/main/res/layout/list_item.xml" value="0.3555253623188406" />
+        <entry key="app/src/main/res/layout/student_list_item.xml" value="0.3677536231884058" />
+        <entry key="app/src/main/res/mipmap-anydpi-v26/ic_launcher.xml" value="0.2557291666666667" />
+        <entry key="app/src/main/res/mipmap-anydpi-v26/ic_launcher_round.xml" value="0.2557291666666667" />
+      </map>
+    </option>
+  </component>
+  <component name="ProjectRootManager" version="2" languageLevel="JDK_11" default="true" project-jdk-name="1.8" project-jdk-type="JavaSDK">
+    <output url="file://$PROJECT_DIR$/build/classes" />
+  </component>
+  <component name="ProjectType">
+    <option name="id" value="Android" />
+  </component>
+  <component name="VisualizationToolProject">
+    <option name="state">
+      <ProjectState>
+        <option name="scale" value="0.2866847826086957" />
+      </ProjectState>
+    </option>
+  </component>
+</project>
\ No newline at end of file

ELearningApp/.idea/vcs.xml

+<?xml version="1.0" encoding="UTF-8"?>
+<project version="4">
+  <component name="VcsDirectoryMappings">
+    <mapping directory="$PROJECT_DIR$/.." vcs="Git" />
+  </component>
+</project>
\ No newline at end of file

ELearningApp/app/.gitignore

+/build
\ No newline at end of file

ELearningApp/app/build.gradle

+plugins {
+    id 'com.android.application'
+}
+
+android {
+    compileSdk 30
+
+    defaultConfig {
+        applicationId "com.symbol.elearningapp"
+        minSdk 26
+        targetSdk 30
+        versionCode 1
+        versionName "1.0"
+
+        testInstrumentationRunner "androidx.test.runner.AndroidJUnitRunner"
+    }
+
+    buildTypes {
+        release {
+            minifyEnabled false
+            proguardFiles getDefaultProguardFile('proguard-android-optimize.txt'), 'proguard-rules.pro'
+        }
+    }
+    compileOptions {
+        sourceCompatibility JavaVersion.VERSION_1_8
+        targetCompatibility JavaVersion.VERSION_1_8
+    }
+}
+
+dependencies {
+
+    implementation 'androidx.appcompat:appcompat:1.3.1'
+    implementation 'com.google.android.material:material:1.4.0'
+    implementation 'androidx.constraintlayout:constraintlayout:2.1.0'
+    testImplementation 'junit:junit:4.+'
+    androidTestImplementation 'androidx.test.ext:junit:1.1.3'
+    androidTestImplementation 'androidx.test.espresso:espresso-core:3.4.0'
+
+    implementation 'com.squareup.retrofit2:retrofit:2.5.0'
+    implementation 'com.squareup.retrofit2:converter-gson:2.5.0'
+    implementation 'com.squareup.retrofit2:converter-scalars:2.9.0'
+
+    implementation 'com.intuit.ssp:ssp-android:1.0.6'
+    implementation 'com.intuit.sdp:sdp-android:1.0.6'
+
+    implementation 'com.google.android.gms:play-services:12.0.1'
+
+    def camerax_version = "1.0.0-beta05"
+    implementation "androidx.camera:camera-camera2:${camerax_version}"
+    implementation "androidx.camera:camera-lifecycle:${camerax_version}"
+    implementation"androidx.camera:camera-view:1.0.0-alpha12"
+    implementation "androidx.camera:camera-extensions:1.0.0-alpha12"
+
+
+// For Card view
+    implementation 'androidx.cardview:cardview:1.0.0'
+
+// Chart and graph library
+    implementation 'com.github.blackfizz:eazegraph:1.2.5l@aar'
+    implementation 'com.nineoldandroids:library:2.4.0'
+
+}
\ No newline at end of file

ELearningApp/app/proguard-rules.pro

+# Add project specific ProGuard rules here.
+# You can control the set of applied configuration files using the
+# proguardFiles setting in build.gradle.
+#
+# For more details, see
+#   http://developer.android.com/guide/developing/tools/proguard.html
+
+# If your project uses WebView with JS, uncomment the following
+# and specify the fully qualified class name to the JavaScript interface
+# class:
+#-keepclassmembers class fqcn.of.javascript.interface.for.webview {
+#   public *;
+#}
+
+# Uncomment this to preserve the line number information for
+# debugging stack traces.
+#-keepattributes SourceFile,LineNumberTable
+
+# If you keep the line number information, uncomment this to
+# hide the original source file name.
+#-renamesourcefileattribute SourceFile
\ No newline at end of file

ELearningApp/app/src/androidTest/java/com/symbol/elearningapp/ExampleInstrumentedTest.java

+package com.symbol.elearningapp;
+
+import android.content.Context;
+
+import androidx.test.platform.app.InstrumentationRegistry;
+import androidx.test.ext.junit.runners.AndroidJUnit4;
+
+import org.junit.Test;
+import org.junit.runner.RunWith;
+
+import static org.junit.Assert.*;
+
+/**
+ * Instrumented test, which will execute on an Android device.
+ *
+ * @see <a href="http://d.android.com/tools/testing">Testing documentation</a>
+ */
+@RunWith(AndroidJUnit4.class)
+public class ExampleInstrumentedTest {
+    @Test
+    public void useAppContext() {
+        // Context of the app under test.
+        Context appContext = InstrumentationRegistry.getInstrumentation().getTargetContext();
+        assertEquals("com.symbol.elearningapp", appContext.getPackageName());
+    }
+}
\ No newline at end of file

ELearningApp/app/src/main/AndroidManifest.xml

+<?xml version="1.0" encoding="utf-8"?>
+<manifest xmlns:android="http://schemas.android.com/apk/res/android"
+    package="com.symbol.elearningapp">
+
+    <uses-permission android:name="android.permission.CAMERA" />
+    <uses-permission android:name="android.permission.INTERNET" />
+    <uses-permission android:name="android.permission.RECORD_AUDIO" />
+    <uses-permission android:name="android.permission.MODIFY_AUDIO_SETTINGS" />
+    <uses-permission android:name="android.permission.MICROPHONE" />
+    <uses-permission android:name="android.permission.RECORD_AUDIO" />
+
+    <uses-feature android:name="android.hardware.audio.low_latency" />
+    <uses-feature android:name="android.hardware.audio.pro" />
+    <uses-feature android:name="android.hardware.microphone" />
+    <uses-feature
+        android:name="android.hardware.camera"
+        android:required="false" />
+    <uses-feature
+        android:name="android.hardware.camera.front"
+        android:required="false" />
+
+    <application
+        android:allowBackup="true"
+        android:icon="@mipmap/ic_launcher"
+        android:label="@string/app_name"
+        android:roundIcon="@mipmap/ic_launcher_round"
+        android:supportsRtl="true"
+        android:theme="@style/Theme.ELearningApp"
+        android:usesCleartextTraffic="true">
+        <activity
+            android:name=".StudentListActivity"
+            android:exported="true" />
+        <activity
+            android:name=".TimerActivity"
+            android:exported="true" />
+        <activity
+            android:name=".JoinClassActivty"
+            android:exported="true" />
+        <activity
+            android:name=".TutorJoinActivity"
+            android:exported="true" />
+        <activity
+            android:name=".AttendenceActivity"
+            android:exported="true" />
+        <activity
+            android:name=".JoinActivity"
+            android:exported="true" />
+        <activity
+            android:name=".ClassAddActivity"
+            android:exported="true" />
+        <activity
+            android:name=".ClassEditActivity"
+            android:exported="true" />
+        <activity
+            android:name=".ClassDetailActivty"
+            android:exported="true" />
+        <activity
+            android:name=".HomeActivity"
+            android:exported="true" />
+        <activity
+            android:name=".LoginActivity"
+            android:exported="true" />
+        <activity
+            android:name=".MainActivity"
+            android:exported="true">
+            <intent-filter>
+                <action android:name="android.intent.action.MAIN" />
+
+                <category android:name="android.intent.category.LAUNCHER" />
+            </intent-filter>
+        </activity>
+    </application>
+
+</manifest>
\ No newline at end of file

ELearningApp/app/src/main/java/com/symbol/elearningapp/Adapters/ClassAdapter.java

+package com.symbol.elearningapp.Adapters;
+
+import android.content.Context;
+import android.content.Intent;
+import android.view.LayoutInflater;
+import android.view.View;
+import android.view.ViewGroup;
+import android.widget.LinearLayout;
+import android.widget.TextView;
+import android.widget.Toast;
+
+import androidx.recyclerview.widget.RecyclerView;
+
+import com.symbol.elearningapp.HomeActivity;
+import com.symbol.elearningapp.LoginActivity;
+import com.symbol.elearningapp.R;
+import com.symbol.elearningapp.service.ClassDetail;
+
+import java.util.List;
+
+public class ClassAdapter extends RecyclerView.Adapter<ClassAdapter.ViewHolder>{
+    private List<ClassDetail> classDetails;
+    Context context;
+    ClickListener clickListener;
+
+        public ClassAdapter(List<ClassDetail> listdata,Context context,ClickListener clickListener) {
+            this.classDetails = listdata;
+            this.context = context;
+            this.clickListener =clickListener;
+        }
+        @Override
+        public ViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {
+            LayoutInflater layoutInflater = LayoutInflater.from(parent.getContext());
+            View listItem= layoutInflater.inflate(R.layout.list_item, parent, false);
+            ViewHolder viewHolder = new ViewHolder(listItem);
+            return viewHolder;
+        }
+
+        @Override
+        public void onBindViewHolder(ViewHolder holder, int position) {
+            final ClassDetail myListData = classDetails.get(position);
+            holder.tvSubjectname.setText(myListData.getSubject());
+            holder.tvDate.setText(myListData.getDate());
+            holder.tvClassTime.setText(myListData.getClassTime());
+            holder.linearLayout.setOnClickListener(v ->{
+                clickListener.onItemClicked(position);
+//                Toast.makeText(context,myListData.getSubject() +" " +myListData.getId(),Toast.LENGTH_LONG).show();
+            });
+
+        }
+
+
+        @Override
+        public int getItemCount() {
+            return classDetails.size();
+        }
+
+        public static class ViewHolder extends RecyclerView.ViewHolder {
+            private ClickListener listener;
+            public TextView tvSubjectname,tvDate,tvClassTime;
+            public LinearLayout linearLayout;
+            public ViewHolder(View itemView) {
+                super(itemView);
+                tvSubjectname = (TextView) itemView.findViewById(R.id.tvSubject);
+                tvDate = (TextView) itemView.findViewById(R.id.tvdate);
+                tvClassTime = (TextView) itemView.findViewById(R.id.tvclasstime);
+                linearLayout = (LinearLayout)itemView.findViewById(R.id.lvitems);
+            }
+        }
+    public interface ClickListener {
+        public void onItemClicked(int position);
+    }
+    }
\ No newline at end of file

ELearningApp/app/src/main/java/com/symbol/elearningapp/AttendenceActivity.java

+package com.symbol.elearningapp;
+
+import androidx.appcompat.app.AppCompatActivity;
+
+import android.app.ProgressDialog;
+import android.graphics.Color;
+import android.os.Bundle;
+import android.text.TextUtils;
+import android.view.View;
+import android.widget.AdapterView;
+import android.widget.ArrayAdapter;
+import android.widget.Spinner;
+import android.widget.TextView;
+
+import com.symbol.elearningapp.Utils.AppPreference;
+import com.symbol.elearningapp.Utils.Constant;
+import com.symbol.elearningapp.service.ChartData;
+import com.symbol.elearningapp.service.ClassDetail;
+import com.symbol.elearningapp.service.RetrofitClient;
+import com.symbol.elearningapp.service.ServiceApi;
+
+import org.eazegraph.lib.charts.PieChart;
+import org.eazegraph.lib.models.PieModel;
+
+import java.util.Calendar;
+import java.util.List;
+
+import retrofit2.Call;
+import retrofit2.Callback;
+import retrofit2.Response;
+
+
+public class AttendenceActivity extends AppCompatActivity {
+    PieChart pieChart;
+    Spinner dropdown;
+    TextView tvsubject,tvTotal,tvAbsent,tvPresent;
+    ServiceApi serviceApi;
+    ProgressDialog progress;
+    AppPreference appPreference;
+
+    @Override
+    protected void onCreate(Bundle savedInstanceState) {
+        super.onCreate(savedInstanceState);
+        setContentView(R.layout.activity_attendence);
+
+        appPreference = new AppPreference(this);
+        serviceApi = RetrofitClient.getApiClient(Constant.baseUrl.BASE_URL).create(ServiceApi.class);
+
+        pieChart = findViewById(R.id.piechart);
+        dropdown = findViewById(R.id.spinner1);
+        tvsubject =findViewById(R.id.tvsubject);
+        tvTotal = findViewById(R.id.tvTotal);
+        tvAbsent = findViewById(R.id.tvAbsent);
+        tvPresent = findViewById(R.id.tvPresent);
+
+        List<ClassDetail> details= CommonData.getClassDetails();
+        String[] items = new String[details.size()];
+        for(int i = 0;i < details.size();i++)
+        {
+            items[i] = details.get(i).getSubject();
+        }
+        ArrayAdapter<String> adapter = new ArrayAdapter<>(this, android.R.layout.simple_spinner_dropdown_item, items);
+        dropdown.setAdapter(adapter);
+
+        dropdown.setOnItemSelectedListener(new AdapterView.OnItemSelectedListener() {
+            @Override
+            public void onItemSelected(AdapterView<?> parent, View view, int position, long id) {
+                String subjectName = dropdown.getItemAtPosition(position).toString();
+                updateClassdetails(subjectName);
+
+            }
+
+            @Override
+            public void onNothingSelected(AdapterView<?> parent) {
+
+            }
+        });
+
+    }
+
+    private void createChart(int present,int absent){
+        pieChart.clearChart();
+        pieChart.addPieSlice(
+                new PieModel(
+                        "Present",
+                        present,
+                        Color.parseColor("#66BB6A")));
+        pieChart.addPieSlice(
+                new PieModel(
+                        "Absent",
+                        absent,
+                        Color.parseColor("#EF5350")));
+
+
+        pieChart.startAnimation();
+
+    }
+    public void updateClassdetails(String subject) {
+        progress = new ProgressDialog(this);
+        progress.setTitle("Please wait");
+        progress.setCancelable(false);
+        progress.show();
+
+            Call<ChartData> userCall = serviceApi.getAttendance("atd/"+CommonData.getId()+"/"+subject);
+//        Call<ChartData> userCall = serviceApi.getAttendance("atd/29/"+subject);
+            userCall.enqueue(new Callback<ChartData>() {
+
+                @Override
+                public void onResponse(Call<ChartData> call, Response<ChartData> response) {
+                    if(response.body() != null)
+                    {
+                        progress.dismiss();
+                        int total = response.body().getReal();
+                        int present =response.body().getDetected();
+                        int absent = total-present;
+                        createChart(present,absent);
+                        tvsubject.setText(subject);
+                        tvAbsent.setText(""+absent);
+                        tvTotal.setText(""+total);
+                        tvPresent.setText(""+present);
+
+                    }
+                    else
+                    {
+                        progress.dismiss();
+                        appPreference.showToast("Server Error occured!!");
+                    }
+
+                }
+
+                @Override
+                public void onFailure(Call<ChartData> call, Throwable t) {
+                    progress.dismiss();
+                    appPreference.showToast("Server Error occured!!");
+                }
+            });
+
+
+    }
+    }
+
+

ELearningApp/app/src/main/java/com/symbol/elearningapp/ClassAddActivity.java

+package com.symbol.elearningapp;
+
+import androidx.appcompat.app.AppCompatActivity;
+
+import android.app.DatePickerDialog;
+import android.app.ProgressDialog;
+import android.app.TimePickerDialog;
+import android.content.Intent;
+import android.os.Bundle;
+import android.text.TextUtils;
+import android.view.View;
+import android.widget.Button;
+import android.widget.DatePicker;
+import android.widget.EditText;
+import android.widget.TimePicker;
+
+import com.symbol.elearningapp.Utils.AppPreference;
+import com.symbol.elearningapp.Utils.Constant;
+import com.symbol.elearningapp.service.ClassDetail;
+import com.symbol.elearningapp.service.RetrofitClient;
+import com.symbol.elearningapp.service.ServiceApi;
+
+import java.text.SimpleDateFormat;
+import java.util.Calendar;
+import java.util.List;
+import java.util.Locale;
+
+import retrofit2.Call;
+import retrofit2.Callback;
+import retrofit2.Response;
+
+public class ClassAddActivity extends AppCompatActivity {
+    Calendar myCalendar;
+    EditText etdate, etclasstime, etsubject;
+    Button addBtn;
+    ServiceApi serviceApi;
+    AppPreference appPreference;
+    ProgressDialog progress;
+
+    @Override
+    protected void onCreate(Bundle savedInstanceState) {
+        super.onCreate(savedInstanceState);
+        setContentView(R.layout.activity_class_add);
+        myCalendar = Calendar.getInstance();
+
+        serviceApi = RetrofitClient.getApiClient(Constant.baseUrl.BASE_URL).create(ServiceApi.class);
+        appPreference = new AppPreference(this);
+        etdate = (EditText) findViewById(R.id.etdate);
+        etclasstime = (EditText) findViewById(R.id.etclasstime);
+        etsubject = (EditText) findViewById(R.id.etsubject);
+        addBtn = findViewById(R.id.btn_add);
+        DatePickerDialog.OnDateSetListener date = new DatePickerDialog.OnDateSetListener() {
+
+            @Override
+            public void onDateSet(DatePicker view, int year, int monthOfYear,
+                                  int dayOfMonth) {
+
+                myCalendar.set(Calendar.YEAR, year);
+                myCalendar.set(Calendar.MONTH, monthOfYear);
+                myCalendar.set(Calendar.DAY_OF_MONTH, dayOfMonth);
+                updateLabel();
+            }
+
+        };
+
+        etdate.setOnClickListener(new View.OnClickListener() {
+
+            @Override
+            public void onClick(View v) {
+                // TODO Auto-generated method stub
+                new DatePickerDialog(ClassAddActivity.this, date, myCalendar
+                        .get(Calendar.YEAR), myCalendar.get(Calendar.MONTH),
+                        myCalendar.get(Calendar.DAY_OF_MONTH)).show();
+            }
+        });
+
+        etclasstime.setOnClickListener(new View.OnClickListener() {
+            final Calendar c = Calendar.getInstance();
+            int mHour = c.get(Calendar.HOUR_OF_DAY);
+            int mMinute = c.get(Calendar.MINUTE);
+
+            @Override
+            public void onClick(View v) {
+                TimePickerDialog timePickerDialog = new TimePickerDialog(ClassAddActivity.this,
+                        new TimePickerDialog.OnTimeSetListener() {
+
+                            @Override
+                            public void onTimeSet(TimePicker view, int hourOfDay,
+                                                  int minute) {
+
+                                etclasstime.setText(hourOfDay + ":" + String.format("%02d", minute));
+                            }
+                        }, mHour, mMinute, true);
+                timePickerDialog.show();
+            }
+
+        });
+        addBtn.setOnClickListener(view -> {
+            addClassdetails();
+        });
+    }
+
+    public void addClassdetails() {
+        progress = new ProgressDialog(this);
+        progress.setTitle("Please wait");
+        progress.setCancelable(false);
+        progress.show();
+        String Subject = etsubject.getText().toString();
+        String Date = etdate.getText().toString();
+        String time = etclasstime.getText().toString();
+        if (TextUtils.isEmpty(Subject)) {
+            appPreference.showToast("Subject name is required.");
+        } else if (TextUtils.isEmpty(Date)) {
+            appPreference.showToast("Please select the date");
+        } else if (TextUtils.isEmpty(time)) {
+            appPreference.showToast("Please select the time");
+        } else {
+            int id = Integer.parseInt(CommonData.getClassDetails().get(CommonData.getClassDetails().size() - 1).getId()) + 1;
+            Call<ClassDetail> userCall = serviceApi.addClassDetail(new ClassDetail("" + id, Subject, Date, time, null));
+            userCall.enqueue(new Callback<ClassDetail>() {
+                @Override
+                public void onResponse(Call<ClassDetail> call, Response<ClassDetail> response) {
+
+                    if (!response.equals("")) {
+                        progress.dismiss();
+                        appPreference.showToast("Added Sucessfully!!");
+                        stopActivity();
+                    } else {
+                        progress.dismiss();
+                        appPreference.showToast("Server Error occured!!");
+                    }
+                }
+
+                @Override
+                public void onFailure(Call<ClassDetail> call, Throwable t) {
+                    progress.dismiss();
+                    appPreference.showToast(t.getMessage());
+                }
+
+            });
+        }
+
+    }
+
+    private void updateLabel() {
+        String myFormat = "MM/dd/yy";
+        SimpleDateFormat sdf = new SimpleDateFormat(myFormat, Locale.US);
+        etdate.setText(sdf.format(myCalendar.getTime()));
+    }
+
+    private void stopActivity() {
+        this.finish();
+    }
+}
\ No newline at end of file

ELearningApp/app/src/main/java/com/symbol/elearningapp/ClassDetailActivty.java

+package com.symbol.elearningapp;
+
+import androidx.appcompat.app.AppCompatActivity;
+import androidx.recyclerview.widget.LinearLayoutManager;
+import androidx.recyclerview.widget.RecyclerView;
+
+import android.content.Intent;
+import android.os.Bundle;
+import android.view.View;
+import android.widget.Button;
+
+import com.symbol.elearningapp.Adapters.ClassAdapter;
+import com.symbol.elearningapp.Utils.AppPreference;
+import com.symbol.elearningapp.Utils.Constant;
+import com.symbol.elearningapp.service.ClassDetail;
+import com.symbol.elearningapp.service.RetrofitClient;
+import com.symbol.elearningapp.service.ServiceApi;
+
+import java.util.List;
+
+import retrofit2.Call;
+import retrofit2.Callback;
+import retrofit2.Response;
+
+public class ClassDetailActivty extends AppCompatActivity implements ClassAdapter.ClickListener {
+    AppPreference appPreference;
+    Button addBtn;
+    ServiceApi serviceApi;
+    RecyclerView recyclerView;
+    ClassAdapter adapter;
+
+    @Override
+    protected void onCreate(Bundle savedInstanceState) {
+        super.onCreate(savedInstanceState);
+        setContentView(R.layout.activity_class_detail_activty);
+        appPreference = new AppPreference(this);
+        addBtn = findViewById(R.id.btn_add);
+        serviceApi = RetrofitClient.getApiClient(Constant.baseUrl.BASE_URL).create(ServiceApi.class);
+
+        if (CommonData.getType().equals("student")) {
+            addBtn.setVisibility(View.INVISIBLE);
+        }
+        addBtn.setOnClickListener(v -> {
+            Intent intent = new Intent(ClassDetailActivty.this, ClassAddActivity.class);
+            startActivity(intent);
+            this.finish();
+        });
+
+        recyclerView = (RecyclerView) findViewById(R.id.rvDetails);
+         adapter = new ClassAdapter(CommonData.getClassDetails(), this, this);
+        recyclerView.setHasFixedSize(true);
+        recyclerView.setLayoutManager(new LinearLayoutManager(this));
+        recyclerView.setAdapter(adapter);
+    }
+
+    @Override
+    public void onItemClicked(int position) {
+        if (!CommonData.getType().equals("student")) {
+            CommonData.setSelectedIndex(position);
+            Intent intent = new Intent(ClassDetailActivty.this, ClassEditActivity.class);
+            startActivity(intent);
+            this.finish();
+        }
+    }
+    public void getClassdetails(){
+        Call<List<ClassDetail>> userCall = serviceApi.classDetails();
+        userCall.enqueue(new Callback<List<ClassDetail>>() {
+            @Override
+            public void onResponse(Call<List<ClassDetail>> call, Response<List<ClassDetail>> response) {
+
+                if (!response.body().equals("")) {
+
+                    CommonData.setClassDetails(response.body());
+                }
+                else {
+                    appPreference.showToast("Server Error occured!!");
+                }
+            }
+
+            @Override
+            public void onFailure(Call<List<ClassDetail>> call, Throwable t) {
+                appPreference.showToast(t.getMessage());
+            }
+
+        });
+    }
+
+    @Override
+    protected void onResume() {
+        super.onResume();
+//        getClassdetails();
+//        adapter.notifyDataSetChanged();
+    }
+
+}
\ No newline at end of file

ELearningApp/app/src/main/java/com/symbol/elearningapp/ClassEditActivity.java

+package com.symbol.elearningapp;
+
+import androidx.appcompat.app.AppCompatActivity;
+
+import android.app.DatePickerDialog;
+import android.app.ProgressDialog;
+import android.app.TimePickerDialog;
+import android.content.Intent;
+import android.os.Bundle;
+import android.text.TextUtils;
+import android.view.View;
+import android.widget.Button;
+import android.widget.DatePicker;
+import android.widget.EditText;
+import android.widget.TimePicker;
+
+import com.symbol.elearningapp.Utils.AppPreference;
+import com.symbol.elearningapp.Utils.Constant;
+import com.symbol.elearningapp.service.ClassDetail;
+import com.symbol.elearningapp.service.RetrofitClient;
+import com.symbol.elearningapp.service.ServiceApi;
+import com.symbol.elearningapp.service.StudentDetails;
+
+import java.text.SimpleDateFormat;
+import java.util.ArrayList;
+import java.util.Calendar;
+import java.util.HashMap;
+import java.util.List;
+import java.util.Locale;
+import java.util.Map;
+
+import retrofit2.Call;
+import retrofit2.Callback;
+import retrofit2.Response;
+
+public class ClassEditActivity extends AppCompatActivity {
+    AppPreference appPreference;
+    Calendar myCalendar;
+    EditText etSubject, etDate, etTime;
+    Button btnDel, btnEdit,btnAdd;
+    int selectedIndex;
+    ServiceApi serviceApi;
+    ProgressDialog progress;
+
+    @Override
+    protected void onCreate(Bundle savedInstanceState) {
+        super.onCreate(savedInstanceState);
+        setContentView(R.layout.activity_class_edit);
+        appPreference = new AppPreference(this);
+        serviceApi = RetrofitClient.getApiClient(Constant.baseUrl.BASE_URL).create(ServiceApi.class);
+        etDate = findViewById(R.id.etdate1);
+        etSubject = findViewById(R.id.etsubject1);
+        etTime = findViewById(R.id.etclasstime1);
+        btnDel = findViewById(R.id.btn_Delete);
+        btnEdit = findViewById(R.id.btn_edit);
+        btnAdd = findViewById(R.id.btn_add);
+        selectedIndex = CommonData.getSelectedIndex();
+
+        etDate.setText(CommonData.getClassDetails().get(selectedIndex).getDate());
+        etSubject.setText(CommonData.getClassDetails().get(selectedIndex).getSubject());
+        etTime.setText(CommonData.getClassDetails().get(selectedIndex).getClassTime());
+
+        btnEdit.setOnClickListener(view -> {
+            updateClassdetails();
+        });
+        btnDel.setOnClickListener(view -> {
+            deleteClassdetails();
+        });
+        btnAdd.setOnClickListener(v -> {
+            getStudentList();
+        });
+        myCalendar = Calendar.getInstance();
+        DatePickerDialog.OnDateSetListener date = new DatePickerDialog.OnDateSetListener() {
+
+            @Override
+            public void onDateSet(DatePicker view, int year, int monthOfYear,
+                                  int dayOfMonth) {
+
+                myCalendar.set(Calendar.YEAR, year);
+                myCalendar.set(Calendar.MONTH, monthOfYear);
+                myCalendar.set(Calendar.DAY_OF_MONTH, dayOfMonth);
+                updateLabel();
+            }
+
+        };
+        etDate.setOnClickListener(new View.OnClickListener() {
+
+            @Override
+            public void onClick(View v) {
+                new DatePickerDialog(ClassEditActivity.this, date, myCalendar
+                        .get(Calendar.YEAR), myCalendar.get(Calendar.MONTH),
+                        myCalendar.get(Calendar.DAY_OF_MONTH)).show();
+            }
+        });
+        etTime.setOnClickListener(new View.OnClickListener() {
+            final Calendar c = Calendar.getInstance();
+            int  mHour = c.get(Calendar.HOUR_OF_DAY);
+            int  mMinute = c.get(Calendar.MINUTE);
+            @Override
+            public void onClick(View v) {
+                TimePickerDialog timePickerDialog = new TimePickerDialog(ClassEditActivity.this,
+                        new TimePickerDialog.OnTimeSetListener() {
+
+                            @Override
+                            public void onTimeSet(TimePicker view, int hourOfDay,
+                                                  int minute) {
+
+                                etTime.setText(hourOfDay + ":" + String.format("%02d", minute));
+                            }
+                        }, mHour, mMinute, true);
+                timePickerDialog.show();
+            }
+
+        });
+    }
+
+    private void updateLabel() {
+        String myFormat = "MM/dd/yy";
+        SimpleDateFormat sdf = new SimpleDateFormat(myFormat, Locale.US);
+
+        etDate.setText(sdf.format(myCalendar.getTime()));
+    }
+
+    public void deleteClassdetails() {
+        progress = new ProgressDialog(this);
+        progress.setTitle("Please wait");
+        progress.setCancelable(false);
+        progress.show();
+        Call<String> userCall = serviceApi.deleteUser(CommonData.getClassDetails().get(CommonData.getSelectedIndex()).getId());
+        userCall.enqueue(new Callback<String>() {
+            @Override
+            public void onResponse(Call<String> call, Response<String> response) {
+                if (response.code()==200) {
+                    progress.dismiss();
+                    appPreference.showToast("deleted Sucessfully");
+                    stopActivity();
+                } else {
+                    appPreference.showToast("Server Error occured!!");
+                }
+            }
+
+            @Override
+            public void onFailure(Call<String> call, Throwable t) {
+                appPreference.showToast(t.getMessage());
+            }
+
+        });
+    }
+
+    public void getStudentList() {
+        progress = new ProgressDialog(this);
+        progress.setTitle("Please wait");
+        progress.setCancelable(false);
+        progress.show();
+        Call<List<StudentDetails>> userCall = serviceApi.getStudents("class/students");
+        userCall.enqueue(new Callback<List<StudentDetails>>() {
+            @Override
+            public void onResponse(Call<List<StudentDetails>> call, Response<List<StudentDetails>> response) {
+
+                if (response.body()!=null)
+                {
+                    CommonData.setStudentDetailsList(response.body());
+                    CommonData.setStudentDetailsHashMap(new HashMap<>());
+                    CommonData.setStudentDetailsHashMap(new HashMap<>());
+                    for(StudentDetails details : CommonData.getStudentDetailsList()){
+                        CommonData.getStudentDetailsHashMap().put(details.getStudentName(),details);
+                    }
+
+                    progress.dismiss();
+                    Intent intent = new Intent(ClassEditActivity.this, StudentListActivity.class);
+                    intent.putExtra("key", "edit");
+                    startActivity(intent);
+                }
+                else
+                {
+                    appPreference.showToast("Server Error occured!!");
+                }
+            }
+
+            @Override
+            public void onFailure(Call<List<StudentDetails>> call, Throwable t) {
+                appPreference.showToast(t.getMessage());
+                progress.dismiss();
+            }
+
+        });
+    }
+
+    public void updateClassdetails() {
+        progress = new ProgressDialog(this);
+        progress.setTitle("Please wait");
+        progress.setCancelable(false);
+        progress.show();
+        String Subject = etSubject.getText().toString();
+        String Date = etDate.getText().toString();
+        String time = etTime.getText().toString();
+        List<StudentDetails> listStudentDetails = new ArrayList<>();
+        if (CommonData.getSelectedStudentDetailsHashMap()!= null) {
+            for(Map.Entry<String, StudentDetails> entry : CommonData.getSelectedStudentDetailsHashMap().entrySet()) {
+                StudentDetails value = entry.getValue();
+                listStudentDetails.add(value);
+            }
+        }
+        if (TextUtils.isEmpty(Subject)) {
+            appPreference.showToast("Subject name is required.");
+        } else if (TextUtils.isEmpty(Date)) {
+            appPreference.showToast("Please select the date");
+        } else if (TextUtils.isEmpty(time)) {
+            appPreference.showToast("Please select the time");
+        } else {
+            Call<String> userCall = serviceApi.updateUser(new ClassDetail(CommonData.getClassDetails().get(CommonData.getSelectedIndex()).getId(), Subject, Date, time, listStudentDetails));
+            userCall.enqueue(new Callback<String>() {
+                @Override
+                public void onResponse(Call<String> call, Response<String> response) {
+
+                    if (response.body().equals("ok")) {
+                        progress.dismiss();
+                        appPreference.showToast("updated Sucessfully");
+                        stopActivity();
+                    } else {
+                        appPreference.showToast("Server Error occured!!");
+                    }
+                }
+
+                @Override
+                public void onFailure(Call<String> call, Throwable t) {
+                    appPreference.showToast(t.getMessage());
+                }
+
+            });
+        }
+
+    }
+    private void stopActivity(){
+        this.finish();
+    }
+}
\ No newline at end of file

ELearningApp/app/src/main/java/com/symbol/elearningapp/CommonData.java

+package com.symbol.elearningapp;
+
+import androidx.appcompat.app.AppCompatActivity;
+
+import com.symbol.elearningapp.service.ClassDetail;
+import com.symbol.elearningapp.service.StudentDetails;
+
+import java.util.HashMap;
+import java.util.List;
+
+public class CommonData{
+    public static List<ClassDetail> classDetails;
+    public static String name;
+    public static String type;
+    public static int selectedIndex;
+    public static String id;
+    public static List<StudentDetails> studentDetailsList;
+    public static HashMap<String, StudentDetails> studentDetailsHashMap;
+    public static HashMap<String, StudentDetails> selectedStudentDetailsHashMap;
+
+    public static HashMap<String, StudentDetails> getSelectedStudentDetailsHashMap() {
+        return selectedStudentDetailsHashMap;
+    }
+
+    public static void setSelectedStudentDetailsHashMap(HashMap<String, StudentDetails> selectedStudentDetailsHashMap) {
+        CommonData.selectedStudentDetailsHashMap = selectedStudentDetailsHashMap;
+    }
+
+    public static HashMap<String, StudentDetails> getStudentDetailsHashMap() {
+        return studentDetailsHashMap;
+    }
+
+    public static void setStudentDetailsHashMap(HashMap<String, StudentDetails> studentDetailsHashMap) {
+        CommonData.studentDetailsHashMap = studentDetailsHashMap;
+    }
+
+    public static List<StudentDetails> getStudentDetailsList() {
+        return studentDetailsList;
+    }
+
+    public static void setStudentDetailsList(List<StudentDetails> studentDetailsList) {
+        CommonData.studentDetailsList = studentDetailsList;
+    }
+
+    public static String getId() {
+        return id;
+    }
+
+    public static void setId(String id) {
+        CommonData.id = id;
+    }
+
+    public static int getSelectedIndex() {
+        return selectedIndex;
+    }
+
+    public static void setSelectedIndex(int selectedIndex) {
+        CommonData.selectedIndex = selectedIndex;
+    }
+
+    public static List<ClassDetail> getClassDetails() {
+        return classDetails;
+    }
+
+    public static void setClassDetails(List<ClassDetail> classDetails) {
+        CommonData.classDetails = classDetails;
+    }
+
+    public static String getType() {
+        return type;
+    }
+
+    public static void setType(String type) {
+        CommonData.type = type;
+    }
+
+    public static void setName(String name) {
+        CommonData.name = name;
+    }
+
+    public static String getName() {
+        return name;
+    }
+
+}

ELearningApp/app/src/main/java/com/symbol/elearningapp/HomeActivity.java

+package com.symbol.elearningapp;
+
+import androidx.appcompat.app.AppCompatActivity;
+import androidx.core.app.ActivityCompat;
+
+import android.Manifest;
+import android.app.ProgressDialog;
+import android.content.Intent;
+import android.content.pm.PackageManager;
+import android.os.Bundle;
+import android.util.Log;
+import android.view.View;
+import android.widget.Button;
+import android.widget.ImageView;
+import android.widget.LinearLayout;
+import android.widget.Toast;
+
+import com.symbol.elearningapp.Utils.AppPreference;
+import com.symbol.elearningapp.Utils.Constant;
+import com.symbol.elearningapp.service.ClassDetail;
+import com.symbol.elearningapp.service.RetrofitClient;
+import com.symbol.elearningapp.service.ServiceApi;
+import com.symbol.elearningapp.service.StudentDetails;
+import com.symbol.elearningapp.service.User;
+
+import java.util.HashMap;
+import java.util.List;
+
+import retrofit2.Call;
+import retrofit2.Callback;
+import retrofit2.Response;
+
+public class HomeActivity extends AppCompatActivity {
+    LinearLayout ll1, ll2, ll3, ll4;
+    ImageView iv1, iv2, iv3, iv4;
+    Button bt1, bt2, bt3, bt4;
+    String type = "student";
+    AppPreference appPreference;
+    ServiceApi serviceApi;
+    ProgressDialog progress;
+
+    @Override
+    protected void onCreate(Bundle savedInstanceState) {
+        super.onCreate(savedInstanceState);
+        setContentView(R.layout.activity_home);
+
+        type = CommonData.getType();
+        serviceApi = RetrofitClient.getApiClient(Constant.baseUrl.BASE_URL).create(ServiceApi.class);
+        appPreference = new AppPreference(this);
+
+        if (ActivityCompat.checkSelfPermission(this, android.Manifest.permission.CAMERA) != PackageManager.PERMISSION_GRANTED) {
+            ActivityCompat.requestPermissions(this, new String[]{Manifest.permission.CAMERA}, 1);
+            Toast.makeText(this, " Please Grant Permission for Camera", Toast.LENGTH_SHORT).show();
+        } else if (ActivityCompat.checkSelfPermission(this, Manifest.permission.MODIFY_AUDIO_SETTINGS) != PackageManager.PERMISSION_GRANTED) {
+            ActivityCompat.requestPermissions(this, new String[]{Manifest.permission.MODIFY_AUDIO_SETTINGS}, 1);
+            Toast.makeText(this, " Please Grant Permission for Camera", Toast.LENGTH_SHORT).show();
+        }
+        ll1 = findViewById(R.id.llbutton1);
+        ll2 = findViewById(R.id.llbutton2);
+        ll3 = findViewById(R.id.llbutton3);
+        ll4 = findViewById(R.id.llbutton4);
+        iv1 = findViewById(R.id.ivbutton1);
+        iv2 = findViewById(R.id.ivbutton2);
+        iv3 = findViewById(R.id.ivbutton3);
+        iv4 = findViewById(R.id.ivbutton4);
+        bt1 = findViewById(R.id.ttbutton1);
+        bt2 = findViewById(R.id.ttbutton2);
+        bt3 = findViewById(R.id.ttbutton3);
+        bt4 = findViewById(R.id.ttbutton4);
+
+
+        populateUI();
+
+
+    }
+
+    public void getClassdetails() {
+        progress = new ProgressDialog(this);
+        progress.setTitle("Please wait");
+        progress.setCancelable(false);
+        progress.show();
+        Call<List<ClassDetail>> userCall = serviceApi.classDetails();
+        userCall.enqueue(new Callback<List<ClassDetail>>() {
+            @Override
+            public void onResponse(Call<List<ClassDetail>> call, Response<List<ClassDetail>> response) {
+
+                if (!response.body().equals("")) {
+
+                    CommonData.setClassDetails(response.body());
+                    progress.dismiss();
+                    Intent intent = new Intent(HomeActivity.this, ClassDetailActivty.class);
+                    startActivity(intent);
+                } else {
+                    appPreference.showToast("Server Error occured!!");
+                }
+            }
+
+            @Override
+            public void onFailure(Call<List<ClassDetail>> call, Throwable t) {
+                appPreference.showToast(t.getMessage());
+                progress.dismiss();
+            }
+
+        });
+    }
+
+    public void getClassjoindetails() {
+        progress = new ProgressDialog(this);
+        progress.setTitle("Please wait");
+        progress.setCancelable(false);
+        progress.show();
+        Call<List<ClassDetail>> userCall = serviceApi.classDetails();
+        userCall.enqueue(new Callback<List<ClassDetail>>() {
+            @Override
+            public void onResponse(Call<List<ClassDetail>> call, Response<List<ClassDetail>> response) {
+
+                if (!response.body().equals("")) {
+
+                    CommonData.setClassDetails(response.body());
+                    progress.dismiss();
+                    Intent intent = new Intent(HomeActivity.this, JoinClassActivty.class);
+                    startActivity(intent);
+                } else {
+                    appPreference.showToast("Server Error occured!!");
+                }
+            }
+
+            @Override
+            public void onFailure(Call<List<ClassDetail>> call, Throwable t) {
+                appPreference.showToast(t.getMessage());
+                progress.dismiss();
+            }
+
+        });
+    }
+
+    public void getAttendanceActivity() {
+        progress = new ProgressDialog(this);
+        progress.setTitle("Please wait");
+        progress.setCancelable(false);
+        progress.show();
+        Call<List<ClassDetail>> userCall = serviceApi.classDetails();
+        userCall.enqueue(new Callback<List<ClassDetail>>() {
+            @Override
+            public void onResponse(Call<List<ClassDetail>> call, Response<List<ClassDetail>> response) {
+
+                if (!response.body().equals("")) {
+
+                    CommonData.setClassDetails(response.body());
+                    progress.dismiss();
+                    Intent intent = new Intent(HomeActivity.this, AttendenceActivity.class);
+                    startActivity(intent);
+                } else {
+                    appPreference.showToast("Server Error occured!!");
+                }
+            }
+
+            @Override
+            public void onFailure(Call<List<ClassDetail>> call, Throwable t) {
+                appPreference.showToast(t.getMessage());
+                progress.dismiss();
+            }
+
+        });
+    }
+
+    public void getStudentList() {
+        progress = new ProgressDialog(this);
+        progress.setTitle("Please wait");
+        progress.setCancelable(false);
+        progress.show();
+        Call<List<StudentDetails>> userCall = serviceApi.getStudents("class/students");
+        userCall.enqueue(new Callback<List<StudentDetails>>() {
+            @Override
+            public void onResponse(Call<List<StudentDetails>> call, Response<List<StudentDetails>> response) {
+
+                if (response.body()!=null)
+                {
+                    CommonData.setStudentDetailsList(response.body());
+                    CommonData.setStudentDetailsHashMap(new HashMap<>());
+                    CommonData.setStudentDetailsHashMap(new HashMap<>());
+                    for(StudentDetails details : CommonData.getStudentDetailsList()){
+                        CommonData.getStudentDetailsHashMap().put(details.getStudentName(),details);
+                    }
+
+                    progress.dismiss();
+                    Intent intent = new Intent(HomeActivity.this, StudentListActivity.class);
+                    intent.putExtra("key", "home");
+                    startActivity(intent);
+                }
+                else
+                {
+                    appPreference.showToast("Server Error occured!!");
+                }
+            }
+
+            @Override
+            public void onFailure(Call<List<StudentDetails>> call, Throwable t) {
+                appPreference.showToast(t.getMessage());
+                progress.dismiss();
+            }
+
+        });
+    }
+
+    public void populateUI() {
+        if (type.equals("student")) {
+            ll1.setVisibility(View.VISIBLE);
+            ll2.setVisibility(View.VISIBLE);
+            ll3.setVisibility(View.VISIBLE);
+            ll4.setVisibility(View.INVISIBLE);
+            iv1.setBackgroundResource(R.drawable.classlogo);
+            iv2.setBackgroundResource(R.drawable.attendancelogo);
+            iv3.setBackgroundResource(R.drawable.joinlogo);
+            bt1.setText("Class Details");
+            bt2.setText("Attendance");
+            bt3.setText("Join");
+
+            bt1.setOnClickListener(v -> {
+                getClassdetails();
+            });
+
+            bt2.setOnClickListener(v -> {
+                getAttendanceActivity();
+            });
+
+            bt3.setOnClickListener(v -> {
+                getClassjoindetails();
+            });
+        } else {
+            ll1.setVisibility(View.VISIBLE);
+            ll2.setVisibility(View.VISIBLE);
+            ll3.setVisibility(View.VISIBLE);
+            ll4.setVisibility(View.INVISIBLE);
+            iv1.setBackgroundResource(R.drawable.classlogo);
+            iv2.setBackgroundResource(R.drawable.attendancelogo);
+            iv3.setBackgroundResource(R.drawable.joinlogo);
+            bt1.setText("Class Details");
+            bt2.setText("Students");
+            bt3.setText("Start Session");
+
+            bt1.setOnClickListener(v -> {
+                getClassdetails();
+
+            });
+
+            bt2.setOnClickListener(v -> {
+                getStudentList();
+            });
+            bt3.setOnClickListener(v -> {
+                getClassjoindetails();
+            });
+
+        }
+    }
+
+
+}
\ No newline at end of file

ELearningApp/app/src/main/java/com/symbol/elearningapp/JoinClassActivty.java

+package com.symbol.elearningapp;
+
+import android.content.Intent;
+import android.os.Bundle;
+import android.view.View;
+import android.widget.Button;
+
+import androidx.appcompat.app.AppCompatActivity;
+import androidx.recyclerview.widget.LinearLayoutManager;
+import androidx.recyclerview.widget.RecyclerView;
+
+import com.symbol.elearningapp.Adapters.ClassAdapter;
+import com.symbol.elearningapp.Utils.AppPreference;
+import com.symbol.elearningapp.Utils.Constant;
+import com.symbol.elearningapp.service.ClassDetail;
+import com.symbol.elearningapp.service.RetrofitClient;
+import com.symbol.elearningapp.service.ServiceApi;
+
+import java.util.List;
+
+import retrofit2.Call;
+import retrofit2.Callback;
+import retrofit2.Response;
+
+public class JoinClassActivty extends AppCompatActivity implements ClassAdapter.ClickListener {
+    AppPreference appPreference;
+    Button addBtn;
+    ServiceApi serviceApi;
+    RecyclerView recyclerView;
+    ClassAdapter adapter;
+
+    @Override
+    protected void onCreate(Bundle savedInstanceState) {
+        super.onCreate(savedInstanceState);
+        setContentView(R.layout.activity_class_detail_activty);
+        appPreference = new AppPreference(this);
+        addBtn = findViewById(R.id.btn_add);
+        serviceApi = RetrofitClient.getApiClient(Constant.baseUrl.BASE_URL).create(ServiceApi.class);
+
+            addBtn.setVisibility(View.INVISIBLE);
+
+        addBtn.setOnClickListener(v -> {
+            Intent intent = new Intent(JoinClassActivty.this, ClassAddActivity.class);
+            startActivity(intent);
+            this.finish();
+        });
+
+        recyclerView = (RecyclerView) findViewById(R.id.rvDetails);
+         adapter = new ClassAdapter(CommonData.getClassDetails(), this, this);
+        recyclerView.setHasFixedSize(true);
+        recyclerView.setLayoutManager(new LinearLayoutManager(this));
+        recyclerView.setAdapter(adapter);
+    }
+
+    @Override
+    public void onItemClicked(int position) {
+
+            CommonData.setSelectedIndex(position);
+            Intent intent = new Intent(JoinClassActivty.this, JoinActivity.class);
+            startActivity(intent);
+            this.finish();
+
+
+
+    }
+    public void getClassdetails(){
+        Call<List<ClassDetail>> userCall = serviceApi.classDetails();
+        userCall.enqueue(new Callback<List<ClassDetail>>() {
+            @Override
+            public void onResponse(Call<List<ClassDetail>> call, Response<List<ClassDetail>> response) {
+
+                if (!response.body().equals("")) {
+
+                    CommonData.setClassDetails(response.body());
+                }
+                else {
+                    appPreference.showToast("Server Error occured!!");
+                }
+            }
+
+            @Override
+            public void onFailure(Call<List<ClassDetail>> call, Throwable t) {
+                appPreference.showToast(t.getMessage());
+            }
+
+        });
+    }
+
+    @Override
+    protected void onResume() {
+        super.onResume();
+//        getClassdetails();
+//        adapter.notifyDataSetChanged();
+    }
+
+}
\ No newline at end of file

ELearningApp/app/src/main/java/com/symbol/elearningapp/LoginActivity.java

+package com.symbol.elearningapp;
+
+import androidx.appcompat.app.AppCompatActivity;
+import androidx.appcompat.widget.AppCompatImageView;
+import androidx.core.content.ContextCompat;
+
+import android.app.ProgressDialog;
+import android.content.Intent;
+import android.os.Bundle;
+import android.text.TextUtils;
+import android.widget.Button;
+import android.widget.TextView;
+
+import com.symbol.elearningapp.Utils.AppPreference;
+import com.symbol.elearningapp.Utils.Constant;
+import com.symbol.elearningapp.service.RetrofitClient;
+import com.symbol.elearningapp.service.ServiceApi;
+import com.symbol.elearningapp.service.User;
+
+import java.sql.SQLOutput;
+
+import retrofit2.Call;
+import retrofit2.Callback;
+import retrofit2.Response;
+
+public class LoginActivity extends AppCompatActivity {
+    Button loginButton;
+    AppCompatImageView ivStudent, ivTutor;
+    TextView tvPWD, tvUserName;
+    ServiceApi serviceApi;
+    AppPreference appPreference;
+    String type = "student";
+    ProgressDialog progress;
+
+    @Override
+    protected void onCreate(Bundle savedInstanceState) {
+        super.onCreate(savedInstanceState);
+        setContentView(R.layout.activity_login);
+
+        serviceApi = RetrofitClient.getApiClient(Constant.baseUrl.BASE_URL).create(ServiceApi.class);
+        appPreference = new AppPreference(this);
+
+        loginButton = findViewById(R.id.btn_login);
+        ivStudent = findViewById(R.id.iv_student);
+        ivTutor = findViewById(R.id.iv_teacher);
+        tvPWD = findViewById(R.id.tvPWD);
+        tvUserName =  findViewById(R.id.tvUserName);
+
+        ivStudent.setOnClickListener(View -> {
+            type = "student";
+            ivStudent.setBackground(ContextCompat.getDrawable(this, R.drawable.darkgrey_back_curved));
+            ivTutor.setBackground(ContextCompat.getDrawable(this, R.drawable.grey_back_curved));
+        });
+
+        ivTutor.setOnClickListener(View -> {
+            type = "tutor";
+            ivTutor.setBackground(ContextCompat.getDrawable(this, R.drawable.darkgrey_back_curved));
+            ivStudent.setBackground(ContextCompat.getDrawable(this, R.drawable.grey_back_curved));
+        });
+
+        loginButton.setOnClickListener(View -> {
+            userLogin();
+        });
+
+    }
+
+    public void userLogin() {
+        progress = new ProgressDialog(this);
+        progress.setTitle("Please wait");
+        progress.setCancelable(false);
+        progress.show();
+
+        String userName = tvUserName.getText().toString();
+        String Password = tvPWD.getText().toString();
+
+        if (TextUtils.isEmpty(userName)) {
+           appPreference.showToast("Username is required.");
+        } else if (TextUtils.isEmpty(Password)) {
+           appPreference.showToast("Password required");
+        } else {
+//            Call<String> userCall = serviceApi.login(new User(type, "bandara.p@gmail.com", "Bandara@123"));
+            Call<String> userCall = serviceApi.login(new User(type, userName,Password));
+            userCall.enqueue(new Callback<String>() {
+                @Override
+                public void onResponse(Call<String> call, Response<String> response) {
+                    String responseString = response.body().toString();
+                    String[] splitStr = responseString.split("\\s+");
+                    if (splitStr[0].equals("student")) {
+                        CommonData.setType("student");
+                        CommonData.setId(splitStr[1]);
+                        Intent intent = new Intent(LoginActivity.this, HomeActivity.class);
+                        startActivity(intent);
+                        progress.dismiss();
+                        tvUserName.setText("");
+                        tvPWD.setText("");
+                    }
+                    else if (splitStr[0].equals("tutor")) {
+                        CommonData.setType("tutor");
+                        CommonData.setId(splitStr[1]);
+                        Intent intent = new Intent(LoginActivity.this, HomeActivity.class);
+                        startActivity(intent);
+                        progress.dismiss();
+                        tvUserName.setText("");
+                        tvPWD.setText("");
+                    }
+                    else {
+                        appPreference.showToast(response.body());
+                    }
+                }
+                @Override
+                public void onFailure(Call<String> call, Throwable t) {
+                       appPreference.showToast("Server Error.!");
+                       progress.dismiss();
+                }
+            });
+        }
+
+
+    }
+}
\ No newline at end of file

ELearningApp/app/src/main/java/com/symbol/elearningapp/MainActivity.java

+package com.symbol.elearningapp;
+
+import androidx.appcompat.app.AppCompatActivity;
+
+import android.content.Intent;
+import android.os.Bundle;
+import android.view.animation.Animation;
+import android.view.animation.AnimationUtils;
+import android.widget.ImageView;
+import android.widget.LinearLayout;
+
+public class MainActivity extends AppCompatActivity {
+    ImageView mLogo;
+    LinearLayout descimage,desctxt;
+    Animation uptodown,downtoup;
+    @Override
+    protected void onCreate(Bundle savedInstanceState) {
+        super.onCreate(savedInstanceState);
+        setContentView(R.layout.activity_main);
+
+        descimage = (LinearLayout) findViewById(R.id.titleimage);
+        desctxt = (LinearLayout) findViewById(R.id.titletxt);
+        mLogo =findViewById(R.id.imageView2);
+        uptodown = AnimationUtils.loadAnimation(this,R.anim.uptodown);
+        downtoup = AnimationUtils.loadAnimation(this,R.anim.downtoup);
+        descimage.setAnimation(uptodown);
+        desctxt.setAnimation(downtoup);
+
+        Thread myThread = new Thread(){
+            @Override
+            public void run(){
+                try {
+                    sleep(5000);
+                    Intent intent = new Intent(getApplicationContext(),LoginActivity.class);
+                    startActivity(intent);
+                    finish();
+                } catch (InterruptedException e) {
+                    e.printStackTrace();
+                }
+            }
+        };
+        myThread.start();
+    }
+    }

ELearningApp/app/src/main/java/com/symbol/elearningapp/StudentListActivity.java

+package com.symbol.elearningapp;
+
+import androidx.appcompat.app.AppCompatActivity;
+
+import android.app.SearchManager;
+import android.database.Cursor;
+import android.os.Bundle;
+import android.view.View;
+import android.widget.AdapterView;
+import android.widget.ArrayAdapter;
+import android.widget.ListView;
+import android.widget.SearchView;
+import android.widget.Toast;
+
+import com.symbol.elearningapp.service.StudentDetails;
+
+import java.util.ArrayList;
+import java.util.HashMap;
+import java.util.List;
+import java.util.Map;
+
+public class StudentListActivity extends AppCompatActivity {
+    SearchView searchView;
+    ListView listView;
+    ArrayList<String> list;
+    ArrayAdapter<String> adapter;
+    HashMap<String, StudentDetails> selectedStudentDetailsHashMap;
+    String passedValue;
+
+    @Override
+    protected void onCreate(Bundle savedInstanceState) {
+        super.onCreate(savedInstanceState);
+        setContentView(R.layout.activity_student_list);
+
+        if (getIntent().getExtras() != null) {
+            passedValue = getIntent().getStringExtra("key");
+
+        }
+        searchView = (SearchView) findViewById(R.id.searchView);
+        listView = (ListView) findViewById(R.id.lv1);
+        selectedStudentDetailsHashMap = new HashMap<>();
+        list = new ArrayList<>();
+       for(StudentDetails details : CommonData.getStudentDetailsList()){
+           list.add(details.getStudentName());
+       }
+
+        adapter = new ArrayAdapter<String>(this, android.R.layout.simple_list_item_1,list);
+        listView.setAdapter(adapter);
+
+        listView.setOnItemClickListener((adapterView, view, i, l) -> {
+            if(passedValue.equals("edit")){
+                String s = listView.getItemAtPosition(i).toString();
+                setStudentList(s);
+            }
+
+            // If you want to close the adapter
+        });
+
+        searchView.setOnQueryTextListener(new SearchView.OnQueryTextListener() {
+            @Override
+            public boolean onQueryTextSubmit(String query) {
+
+                if(list.contains(query)){
+                    adapter.getFilter().filter(query);
+                }else{
+                    Toast.makeText(StudentListActivity.this, "No Match found",Toast.LENGTH_LONG).show();
+                }
+                return false;
+            }
+
+            @Override
+            public boolean onQueryTextChange(String newText) {
+                    adapter.getFilter().filter(newText);
+                return false;
+            }
+        });
+        if(passedValue.equals("edit")){
+            if(CommonData.getClassDetails().get(CommonData.getSelectedIndex()).getListStd() != null){
+                for(StudentDetails studentDetails :CommonData.getClassDetails().get(CommonData.getSelectedIndex()).getListStd()){
+                    selectedStudentDetailsHashMap.put(studentDetails.getStudentName(),studentDetails);
+                }
+            }
+
+        }
+    }
+
+    public void setStudentList(String name){
+        boolean alreadyNotAdded = true;
+        if (CommonData.getSelectedStudentDetailsHashMap()!=null) {
+
+            for(Map.Entry<String, StudentDetails> entry : CommonData.getSelectedStudentDetailsHashMap().entrySet()) {
+                String key = entry.getKey();
+                if(name.equals(key)){
+                    alreadyNotAdded = false;
+                }
+            }
+        }
+        else if(selectedStudentDetailsHashMap!=null){
+            for(Map.Entry<String, StudentDetails> entry : selectedStudentDetailsHashMap.entrySet()) {
+                String key = entry.getKey();
+                if(name.equals(key)){
+                    alreadyNotAdded = false;
+                }
+            }
+
+        }
+
+        if(alreadyNotAdded)
+        {
+            for(Map.Entry<String, StudentDetails> entry : CommonData.getStudentDetailsHashMap().entrySet()) {
+                String key = entry.getKey();
+                StudentDetails value = entry.getValue();
+                if(name.equals(key)){
+                    selectedStudentDetailsHashMap.put(key,value);
+                }
+            }
+            Toast.makeText(StudentListActivity.this, "Added sucessfully",Toast.LENGTH_LONG).show();
+        }
+        else
+        {
+            Toast.makeText(StudentListActivity.this, "Already added",Toast.LENGTH_LONG).show();
+        }
+        }
+
+    @Override
+    public void onBackPressed() {
+        super.onBackPressed();
+        if(passedValue.equals("edit")){
+            CommonData.setSelectedStudentDetailsHashMap(selectedStudentDetailsHashMap);
+        }
+
+    }
+}
\ No newline at end of file

ELearningApp/app/src/main/java/com/symbol/elearningapp/TimerActivity.java

+package com.symbol.elearningapp;
+
+import androidx.appcompat.app.AppCompatActivity;
+
+import android.os.Bundle;
+import android.os.Handler;
+import android.view.View;
+import android.widget.TextView;
+
+import java.util.Locale;
+
+public class TimerActivity extends AppCompatActivity {
+
+// before the activity was paused.
+
+    // Number of seconds displayed
+    // on the stopwatch.
+    private int seconds = 0;
+
+    // Is the stopwatch running?
+    private boolean running;
+
+    private boolean wasRunning;
+
+    @Override
+    protected void onCreate(Bundle savedInstanceState)
+    {
+        super.onCreate(savedInstanceState);
+        setContentView(R.layout.activity_timer);
+        if (savedInstanceState != null) {
+
+            // Get the previous state of the stopwatch
+            // if the activity has been
+            // destroyed and recreated.
+            seconds
+                    = savedInstanceState
+                    .getInt("seconds");
+            running
+                    = savedInstanceState
+                    .getBoolean("running");
+            wasRunning
+                    = savedInstanceState
+                    .getBoolean("wasRunning");
+        }
+        runTimer();
+    }
+
+    // Save the state of the stopwatch
+    // if it's about to be destroyed.
+    @Override
+    public void onSaveInstanceState(
+            Bundle savedInstanceState) {
+        super.onSaveInstanceState(savedInstanceState);
+        savedInstanceState
+                .putInt("seconds", seconds);
+        savedInstanceState
+                .putBoolean("running", running);
+        savedInstanceState
+                .putBoolean("wasRunning", wasRunning);
+    }
+
+    // If the activity is paused,
+    // stop the stopwatch.
+    @Override
+    protected void onPause()
+    {
+        super.onPause();
+        wasRunning = running;
+        running = false;
+    }
+
+    // If the activity is resumed,
+    // start the stopwatch
+    // again if it was running previously.
+    @Override
+    protected void onResume()
+    {
+        super.onResume();
+        if (wasRunning) {
+            running = true;
+        }
+    }
+
+    // Start the stopwatch running
+    // when the Start button is clicked.
+    // Below method gets called
+    // when the Start button is clicked.
+    public void onClickStart(View view)
+    {
+        running = true;
+    }
+
+    // Stop the stopwatch running
+    // when the Stop button is clicked.
+    // Below method gets called
+    // when the Stop button is clicked.
+    public void onClickStop(View view)
+    {
+        running = false;
+    }
+
+    // Reset the stopwatch when
+    // the Reset button is clicked.
+    // Below method gets called
+    // when the Reset button is clicked.
+    public void onClickReset(View view)
+    {
+        running = false;
+        seconds = 0;
+    }
+
+    // Sets the NUmber of seconds on the timer.
+    // The runTimer() method uses a Handler
+    // to increment the seconds and
+    // update the text view.
+    private void runTimer()
+    {
+
+        // Get the text view.
+        final TextView timeView
+                = (TextView)findViewById(
+                R.id.time_view);
+
+        // Creates a new Handler
+        final Handler handler
+                = new Handler();
+
+        // Call the post() method,
+        // passing in a new Runnable.
+        // The post() method processes
+        // code without a delay,
+        // so the code in the Runnable
+        // will run almost immediately.
+        handler.post(new Runnable() {
+            @Override
+
+            public void run()
+            {
+                int hours = seconds / 3600;
+                int minutes = (seconds % 3600) / 60;
+                int secs = seconds % 60;
+
+                // Format the seconds into hours, minutes,
+                // and seconds.
+                String time
+                        = String
+                        .format(Locale.getDefault(),
+                                "%d:%02d:%02d", hours,
+                                minutes, secs);
+
+                // Set the text view text.
+                timeView.setText(time);
+
+                // If running is true, increment the
+                // seconds variable.
+                if (running) {
+                    seconds++;
+                }
+
+                // Post the code again
+                // with a delay of 1 second.
+                handler.postDelayed(this, 1000);
+            }
+        });
+    }
+}

ELearningApp/app/src/main/java/com/symbol/elearningapp/TutorJoinActivity.java

+package com.symbol.elearningapp;
+
+import androidx.annotation.NonNull;
+import androidx.appcompat.app.AppCompatActivity;
+import androidx.camera.core.Camera;
+import androidx.camera.core.CameraSelector;
+import androidx.camera.core.ImageAnalysis;
+import androidx.camera.core.ImageCapture;
+import androidx.camera.core.Preview;
+import androidx.camera.extensions.HdrImageCaptureExtender;
+import androidx.camera.lifecycle.ProcessCameraProvider;
+import androidx.camera.view.PreviewView;
+import androidx.core.app.ActivityCompat;
+import androidx.core.content.ContextCompat;
+import androidx.lifecycle.LifecycleOwner;
+
+import android.Manifest;
+import android.content.pm.PackageManager;
+import android.os.Bundle;
+import android.view.SurfaceView;
+import android.widget.Toast;
+
+import com.google.common.util.concurrent.ListenableFuture;
+
+import java.util.concurrent.ExecutionException;
+
+public class TutorJoinActivity extends AppCompatActivity {
+    SurfaceView surfaceView;
+    PreviewView mPreviewView;
+
+    @Override
+    protected void onCreate(Bundle savedInstanceState) {
+        super.onCreate(savedInstanceState);
+        setContentView(R.layout.activity_tutor_join);
+        mPreviewView = findViewById(R.id.previewView);
+        if (ActivityCompat.checkSelfPermission(this, android.Manifest.permission.CAMERA) != PackageManager.PERMISSION_GRANTED) {
+            ActivityCompat.requestPermissions(this, new String[]{Manifest.permission.CAMERA}, 1);
+            Toast.makeText(this, "Grant Permission and restart app", Toast.LENGTH_SHORT).show();
+        } else {
+            startCamera();
+        }
+    }
+
+    private void startCamera() {
+
+        final ListenableFuture<ProcessCameraProvider> cameraProviderFuture = ProcessCameraProvider.getInstance(this);
+
+        cameraProviderFuture.addListener(new Runnable() {
+            @Override
+            public void run() {
+                try {
+
+                    ProcessCameraProvider cameraProvider = cameraProviderFuture.get();
+                    bindPreview(cameraProvider);
+
+                } catch (ExecutionException | InterruptedException e) {
+                    // No errors need to be handled for this Future.
+                    // This should never be reached.
+                }
+            }
+        }, ContextCompat.getMainExecutor(this));
+    }
+
+    void bindPreview(@NonNull ProcessCameraProvider cameraProvider) {
+
+        Preview preview = new Preview.Builder()
+                .build();
+
+        CameraSelector cameraSelector = new CameraSelector.Builder()
+                .requireLensFacing(CameraSelector.LENS_FACING_FRONT)
+                .build();
+
+        ImageAnalysis imageAnalysis = new ImageAnalysis.Builder()
+                .build();
+
+        ImageCapture.Builder builder = new ImageCapture.Builder();
+
+        HdrImageCaptureExtender hdrImageCaptureExtender = HdrImageCaptureExtender.create(builder);
+
+        if (hdrImageCaptureExtender.isExtensionAvailable(cameraSelector)) {
+
+            hdrImageCaptureExtender.enableExtension(cameraSelector);
+        }
+
+        final ImageCapture imageCapture = builder
+                .setTargetRotation(this.getWindowManager().getDefaultDisplay().getRotation())
+                .build();
+
+        preview.setSurfaceProvider(mPreviewView.createSurfaceProvider());
+
+        Camera camera = cameraProvider.bindToLifecycle((LifecycleOwner) this, cameraSelector, preview, imageAnalysis, imageCapture);
+
+    }
+
+}
\ No newline at end of file

ELearningApp/app/src/main/java/com/symbol/elearningapp/Utils/AppPreference.java

+package com.symbol.elearningapp.Utils;
+
+import android.content.Context;
+import android.content.SharedPreferences;
+import android.widget.Toast;
+import com.symbol.elearningapp.R;
+
+
+public class AppPreference {
+    private SharedPreferences sharedPreferences;
+    private SharedPreferences.Editor editor;
+    private Context context;
+
+    public AppPreference(Context context){
+        this.context = context;
+        sharedPreferences = context.getSharedPreferences(String.valueOf(R.string.s_pref_file), Context.MODE_PRIVATE);
+        editor = sharedPreferences.edit();
+    }
+
+    public void showToast(String message){
+        Toast.makeText(context, message, Toast.LENGTH_LONG).show();
+    }
+
+    public void settype(String name){
+        editor.putString(String.valueOf(R.string.s_pref_type), name);
+        editor.commit();
+    }
+
+    public String gettype(){
+        return sharedPreferences.getString(String.valueOf(R.string.s_pref_type), "user");
+    }
+
+}
\ No newline at end of file

ELearningApp/app/src/main/java/com/symbol/elearningapp/Utils/Constant.java

+package com.symbol.elearningapp.Utils;
+
+public class Constant {
+
+    public static class baseUrl {
+        public final static String BASE_URL = "https://e-education600.herokuapp.com";
+    }
+
+
+}

ELearningApp/app/src/main/java/com/symbol/elearningapp/service/AttendanceDetail.java

+package com.symbol.elearningapp.service;
+
+import com.google.gson.annotations.Expose;
+import com.google.gson.annotations.SerializedName;
+
+public class AttendanceDetail {
+
+        @SerializedName("userId")
+        @Expose
+        private String userId;
+        @SerializedName("detectedTime")
+        @Expose
+        private String detectedTime;
+        @SerializedName("fullTime")
+        @Expose
+        private String fullTime;
+        @SerializedName("subject")
+        @Expose
+        private String subject;
+
+        public AttendanceDetail(String userId, String detectedTime, String fullTime, String subject) {
+            this.userId = userId;
+            this.detectedTime = detectedTime;
+            this.fullTime = fullTime;
+            this.subject = subject;
+        }
+
+        public String getUserId() {
+            return userId;
+        }
+
+        public void setUserId(String userId) {
+            this.userId = userId;
+        }
+
+        public String getDetectedTime() {
+            return detectedTime;
+        }
+
+        public void setDetectedTime(String detectedTime) {
+            this.detectedTime = detectedTime;
+        }
+
+        public String getFullTime() {
+            return fullTime;
+        }
+
+        public void setFullTime(String fullTime) {
+            this.fullTime = fullTime;
+        }
+
+        public String getSubject() {
+            return subject;
+        }
+
+        public void setSuject(String suject) {
+            this.subject = suject;
+        }
+
+
+}

ELearningApp/app/src/main/java/com/symbol/elearningapp/service/ChartData.java

+package com.symbol.elearningapp.service;
+
+import com.google.gson.annotations.Expose;
+import com.google.gson.annotations.SerializedName;
+
+public class ChartData {
+    @SerializedName("real")
+    @Expose
+    private Integer real;
+    @SerializedName("detected")
+    @Expose
+    private Integer detected;
+
+    public Integer getReal() {
+        return real;
+    }
+
+    public void setReal(Integer real) {
+        this.real = real;
+    }
+
+    public Integer getDetected() {
+        return detected;
+    }
+
+    public void setDetected(Integer detected) {
+        this.detected = detected;
+    }
+
+}
\ No newline at end of file

ELearningApp/app/src/main/java/com/symbol/elearningapp/service/ClassDetail.java

+package com.symbol.elearningapp.service;
+
+import com.google.gson.annotations.Expose;
+import com.google.gson.annotations.SerializedName;
+
+import java.util.List;
+
+public class ClassDetail {
+
+    @SerializedName("id")
+    @Expose
+    private String id;
+    @SerializedName("subject")
+    @Expose
+    private String subject;
+    @SerializedName("date")
+    @Expose
+    private String date;
+    @SerializedName("classTime")
+    @Expose
+    private String classTime;
+    @SerializedName("listStd")
+    @Expose
+    private List<StudentDetails> listStd = null;
+
+
+    public ClassDetail(String id, String subject, String date, String classTime, List<StudentDetails> listStd) {
+        this.id = id;
+        this.subject = subject;
+        this.date = date;
+        this.classTime = classTime;
+        this.listStd = listStd;
+    }
+
+    public String getId() {
+        return id;
+    }
+
+    public void setId(String id) {
+        this.id = id;
+    }
+
+    public String getSubject() {
+        return subject;
+    }
+
+    public void setSubject(String subject) {
+        this.subject = subject;
+    }
+
+    public String getDate() {
+        return date;
+    }
+
+    public void setDate(String date) {
+        this.date = date;
+    }
+
+    public String getClassTime() {
+        return classTime;
+    }
+
+    public void setClassTime(String classTime) {
+        this.classTime = classTime;
+    }
+
+    public List<StudentDetails> getListStd() {
+        return listStd;
+    }
+
+    public void setListStd(List<StudentDetails> listStd) {
+        this.listStd = listStd;
+    }
+
+}

ELearningApp/app/src/main/java/com/symbol/elearningapp/service/RetrofitClient.java

+package com.symbol.elearningapp.service;
+
+import android.util.Log;
+
+import com.google.gson.Gson;
+import com.google.gson.GsonBuilder;
+
+import retrofit2.Retrofit;
+import retrofit2.converter.gson.GsonConverterFactory;
+import retrofit2.converter.scalars.ScalarsConverterFactory;
+
+public class RetrofitClient {
+
+    public static Retrofit getApiClient(String baseUrl){
+        Gson gson = new GsonBuilder()
+                .setLenient()
+                .create();
+
+        Retrofit retrofit = new Retrofit.Builder()
+                .baseUrl(baseUrl)
+                .addConverterFactory(ScalarsConverterFactory.create())
+                .addConverterFactory(GsonConverterFactory.create(gson))
+                .build();
+
+        return retrofit;
+    }
+}

ELearningApp/app/src/main/java/com/symbol/elearningapp/service/ServiceApi.java

+package com.symbol.elearningapp.service;
+
+
+
+import java.util.List;
+
+import retrofit2.Call;
+import retrofit2.http.Body;
+import retrofit2.http.DELETE;
+import retrofit2.http.GET;
+import retrofit2.http.POST;
+import retrofit2.http.PUT;
+import retrofit2.http.Path;
+import retrofit2.http.Query;
+import retrofit2.http.Url;
+
+
+public interface ServiceApi {
+
+    @POST("/login")
+    Call<String> login(@Body User  body);
+
+    @GET("/class")
+    Call<List<ClassDetail>> classDetails();
+
+    @POST("/class")
+    Call<ClassDetail> addClassDetail(@Body ClassDetail  body);
+
+    @PUT("/class")
+    Call<String> updateUser(@Body ClassDetail  body);
+
+    @DELETE("/class")
+    Call<String> deleteUser(@Query("id") String id);
+
+    @POST("/atd")
+    Call<AttendanceDetail> addAttendance(@Body AttendanceDetail  body);
+
+    @GET()
+    Call<ChartData> getAttendance(@Url String url);
+
+    @GET()
+    Call<List<StudentDetails>> getStudents(@Url String url);
+
+
+
+}

ELearningApp/app/src/main/java/com/symbol/elearningapp/service/StudentDetails.java

+package com.symbol.elearningapp.service;
+
+import com.google.gson.annotations.Expose;
+import com.google.gson.annotations.SerializedName;
+
+public class StudentDetails {
+
+        @SerializedName("id")
+        @Expose
+        private String id;
+        @SerializedName("student_name")
+        @Expose
+        private String studentName;
+
+        public String getId() {
+            return id;
+        }
+
+        public void setId(String id) {
+            this.id = id;
+        }
+
+        public String getStudentName() {
+            return studentName;
+        }
+
+        public void setStudentName(String studentName) {
+            this.studentName = studentName;
+        }
+
+    }
+

ELearningApp/app/src/main/java/com/symbol/elearningapp/service/User.java

+package com.symbol.elearningapp.service;
+
+import com.google.gson.annotations.Expose;
+import com.google.gson.annotations.SerializedName;
+
+public class User {
+
+    private String role;
+    private String username;
+    private String password;
+
+    public User(String role, String username, String password) {
+        this.role = role;
+        this.username = username;
+        this.password = password;
+    }
+
+    public User(String username, String password) {
+        this.username = username;
+        this.password = password;
+    }
+
+    public String getRole() {
+        return role;
+    }
+
+    public void setRole(String role) {
+        this.role = role;
+    }
+
+    public String getUsername() {
+        return username;
+    }
+
+    public void setUsername(String username) {
+        this.username = username;
+    }
+
+    public String getPassword() {
+        return password;
+    }
+
+    public void setPassword(String password) {
+        this.password = password;
+    }
+
+}
\ No newline at end of file

ELearningApp/app/src/main/res/anim/downtoup.xml

+<?xml version="1.0" encoding="utf-8"?>
+<set xmlns:android="http://schemas.android.com/apk/res/android">
+    <translate android:toYDelta="0%p"
+        android:fromYDelta="100%p"
+        android:duration="3000"/>
+</set>
\ No newline at end of file

ELearningApp/app/src/main/res/anim/uptodown.xml

+<?xml version="1.0" encoding="utf-8"?>
+<set xmlns:android="http://schemas.android.com/apk/res/android">
+    <translate android:duration="2000"
+        android:fromYDelta="-100%p"
+        android:fromXDelta="0%p"/>
+</set>

ELearningApp/app/src/main/res/drawable-v24/grey_back_curved.xml

+<?xml version="1.0" encoding="utf-8"?>
+<shape xmlns:android="http://schemas.android.com/apk/res/android">
+<solid android:color="@color/button_grey"/>
+<corners android:radius="10dp"/>
+</shape>
\ No newline at end of file

ELearningApp/app/src/main/res/drawable-v24/ic_launcher_foreground.xml

+<vector xmlns:android="http://schemas.android.com/apk/res/android"
+    xmlns:aapt="http://schemas.android.com/aapt"
+    android:width="108dp"
+    android:height="108dp"
+    android:viewportWidth="108"
+    android:viewportHeight="108">
+    <path android:pathData="M31,63.928c0,0 6.4,-11 12.1,-13.1c7.2,-2.6 26,-1.4 26,-1.4l38.1,38.1L107,108.928l-32,-1L31,63.928z">
+        <aapt:attr name="android:fillColor">
+            <gradient
+                android:endX="85.84757"
+                android:endY="92.4963"
+                android:startX="42.9492"
+                android:startY="49.59793"
+                android:type="linear">
+                <item
+                    android:color="#44000000"
+                    android:offset="0.0" />
+                <item
+                    android:color="#00000000"
+                    android:offset="1.0" />
+            </gradient>
+        </aapt:attr>
+    </path>
+    <path
+        android:fillColor="#FFFFFF"
+        android:fillType="nonZero"
+        android:pathData="M65.3,45.828l3.8,-6.6c0.2,-0.4 0.1,-0.9 -0.3,-1.1c-0.4,-0.2 -0.9,-0.1 -1.1,0.3l-3.9,6.7c-6.3,-2.8 -13.4,-2.8 -19.7,0l-3.9,-6.7c-0.2,-0.4 -0.7,-0.5 -1.1,-0.3C38.8,38.328 38.7,38.828 38.9,39.228l3.8,6.6C36.2,49.428 31.7,56.028 31,63.928h46C76.3,56.028 71.8,49.428 65.3,45.828zM43.4,57.328c-0.8,0 -1.5,-0.5 -1.8,-1.2c-0.3,-0.7 -0.1,-1.5 0.4,-2.1c0.5,-0.5 1.4,-0.7 2.1,-0.4c0.7,0.3 1.2,1 1.2,1.8C45.3,56.528 44.5,57.328 43.4,57.328L43.4,57.328zM64.6,57.328c-0.8,0 -1.5,-0.5 -1.8,-1.2s-0.1,-1.5 0.4,-2.1c0.5,-0.5 1.4,-0.7 2.1,-0.4c0.7,0.3 1.2,1 1.2,1.8C66.5,56.528 65.6,57.328 64.6,57.328L64.6,57.328z"
+        android:strokeWidth="1"
+        android:strokeColor="#00000000" />
+</vector>
\ No newline at end of file

ELearningApp/app/src/main/res/drawable-v24/white_curved.xml

+<?xml version="1.0" encoding="utf-8"?>
+<shape xmlns:android="http://schemas.android.com/apk/res/android">
+<solid android:color="@color/white"/>
+<corners android:radius="10dp"/>
+</shape>
\ No newline at end of file

ELearningApp/app/src/main/res/drawable/darkgrey_back_curved.xml

+<?xml version="1.0" encoding="utf-8"?>
+<shape xmlns:android="http://schemas.android.com/apk/res/android">
+<solid android:color="@color/colorPrimaryDark"/>
+<corners android:radius="10dp"/>
+</shape>
\ No newline at end of file

ELearningApp/app/src/main/res/drawable/ic_launcher_background.xml

+<?xml version="1.0" encoding="utf-8"?>
+<vector
+    android:height="108dp"
+    android:width="108dp"
+    android:viewportHeight="108"
+    android:viewportWidth="108"
+    xmlns:android="http://schemas.android.com/apk/res/android">
+    <path android:fillColor="#3DDC84"
+          android:pathData="M0,0h108v108h-108z"/>
+    <path android:fillColor="#00000000" android:pathData="M9,0L9,108"
+          android:strokeColor="#33FFFFFF" android:strokeWidth="0.8"/>
+    <path android:fillColor="#00000000" android:pathData="M19,0L19,108"
+          android:strokeColor="#33FFFFFF" android:strokeWidth="0.8"/>
+    <path android:fillColor="#00000000" android:pathData="M29,0L29,108"
+          android:strokeColor="#33FFFFFF" android:strokeWidth="0.8"/>
+    <path android:fillColor="#00000000" android:pathData="M39,0L39,108"
+          android:strokeColor="#33FFFFFF" android:strokeWidth="0.8"/>
+    <path android:fillColor="#00000000" android:pathData="M49,0L49,108"
+          android:strokeColor="#33FFFFFF" android:strokeWidth="0.8"/>
+    <path android:fillColor="#00000000" android:pathData="M59,0L59,108"
+          android:strokeColor="#33FFFFFF" android:strokeWidth="0.8"/>
+    <path android:fillColor="#00000000" android:pathData="M69,0L69,108"
+          android:strokeColor="#33FFFFFF" android:strokeWidth="0.8"/>
+    <path android:fillColor="#00000000" android:pathData="M79,0L79,108"
+          android:strokeColor="#33FFFFFF" android:strokeWidth="0.8"/>
+    <path android:fillColor="#00000000" android:pathData="M89,0L89,108"
+          android:strokeColor="#33FFFFFF" android:strokeWidth="0.8"/>
+    <path android:fillColor="#00000000" android:pathData="M99,0L99,108"
+          android:strokeColor="#33FFFFFF" android:strokeWidth="0.8"/>
+    <path android:fillColor="#00000000" android:pathData="M0,9L108,9"
+          android:strokeColor="#33FFFFFF" android:strokeWidth="0.8"/>
+    <path android:fillColor="#00000000" android:pathData="M0,19L108,19"
+          android:strokeColor="#33FFFFFF" android:strokeWidth="0.8"/>
+    <path android:fillColor="#00000000" android:pathData="M0,29L108,29"
+          android:strokeColor="#33FFFFFF" android:strokeWidth="0.8"/>
+    <path android:fillColor="#00000000" android:pathData="M0,39L108,39"
+          android:strokeColor="#33FFFFFF" android:strokeWidth="0.8"/>
+    <path android:fillColor="#00000000" android:pathData="M0,49L108,49"
+          android:strokeColor="#33FFFFFF" android:strokeWidth="0.8"/>
+    <path android:fillColor="#00000000" android:pathData="M0,59L108,59"
+          android:strokeColor="#33FFFFFF" android:strokeWidth="0.8"/>
+    <path android:fillColor="#00000000" android:pathData="M0,69L108,69"
+          android:strokeColor="#33FFFFFF" android:strokeWidth="0.8"/>
+    <path android:fillColor="#00000000" android:pathData="M0,79L108,79"
+          android:strokeColor="#33FFFFFF" android:strokeWidth="0.8"/>
+    <path android:fillColor="#00000000" android:pathData="M0,89L108,89"
+          android:strokeColor="#33FFFFFF" android:strokeWidth="0.8"/>
+    <path android:fillColor="#00000000" android:pathData="M0,99L108,99"
+          android:strokeColor="#33FFFFFF" android:strokeWidth="0.8"/>
+    <path android:fillColor="#00000000" android:pathData="M19,29L89,29"
+          android:strokeColor="#33FFFFFF" android:strokeWidth="0.8"/>
+    <path android:fillColor="#00000000" android:pathData="M19,39L89,39"
+          android:strokeColor="#33FFFFFF" android:strokeWidth="0.8"/>
+    <path android:fillColor="#00000000" android:pathData="M19,49L89,49"
+          android:strokeColor="#33FFFFFF" android:strokeWidth="0.8"/>
+    <path android:fillColor="#00000000" android:pathData="M19,59L89,59"
+          android:strokeColor="#33FFFFFF" android:strokeWidth="0.8"/>
+    <path android:fillColor="#00000000" android:pathData="M19,69L89,69"
+          android:strokeColor="#33FFFFFF" android:strokeWidth="0.8"/>
+    <path android:fillColor="#00000000" android:pathData="M19,79L89,79"
+          android:strokeColor="#33FFFFFF" android:strokeWidth="0.8"/>
+    <path android:fillColor="#00000000" android:pathData="M29,19L29,89"
+          android:strokeColor="#33FFFFFF" android:strokeWidth="0.8"/>
+    <path android:fillColor="#00000000" android:pathData="M39,19L39,89"
+          android:strokeColor="#33FFFFFF" android:strokeWidth="0.8"/>
+    <path android:fillColor="#00000000" android:pathData="M49,19L49,89"
+          android:strokeColor="#33FFFFFF" android:strokeWidth="0.8"/>
+    <path android:fillColor="#00000000" android:pathData="M59,19L59,89"
+          android:strokeColor="#33FFFFFF" android:strokeWidth="0.8"/>
+    <path android:fillColor="#00000000" android:pathData="M69,19L69,89"
+          android:strokeColor="#33FFFFFF" android:strokeWidth="0.8"/>
+    <path android:fillColor="#00000000" android:pathData="M79,19L79,89"
+          android:strokeColor="#33FFFFFF" android:strokeWidth="0.8"/>
+</vector>

ELearningApp/app/src/main/res/drawable/ic_launcher_bg.xml

+<?xml version="1.0" encoding="utf-8"?>
+<vector
+    android:height="108dp"
+    android:width="108dp"
+    android:viewportHeight="108"
+    android:viewportWidth="108"
+    xmlns:android="http://schemas.android.com/apk/res/android">
+    <path android:fillColor="#FAFAFA"
+          android:pathData="M0,0h108v108h-108z"/>
+    <path android:fillColor="#00000000" android:pathData="M9,0L9,108"
+          android:strokeColor="#33FFFFFF" android:strokeWidth="0.8"/>
+    <path android:fillColor="#00000000" android:pathData="M19,0L19,108"
+          android:strokeColor="#33FFFFFF" android:strokeWidth="0.8"/>
+    <path android:fillColor="#00000000" android:pathData="M29,0L29,108"
+          android:strokeColor="#33FFFFFF" android:strokeWidth="0.8"/>
+    <path android:fillColor="#00000000" android:pathData="M39,0L39,108"
+          android:strokeColor="#33FFFFFF" android:strokeWidth="0.8"/>
+    <path android:fillColor="#00000000" android:pathData="M49,0L49,108"
+          android:strokeColor="#33FFFFFF" android:strokeWidth="0.8"/>
+    <path android:fillColor="#00000000" android:pathData="M59,0L59,108"
+          android:strokeColor="#33FFFFFF" android:strokeWidth="0.8"/>
+    <path android:fillColor="#00000000" android:pathData="M69,0L69,108"
+          android:strokeColor="#33FFFFFF" android:strokeWidth="0.8"/>
+    <path android:fillColor="#00000000" android:pathData="M79,0L79,108"
+          android:strokeColor="#33FFFFFF" android:strokeWidth="0.8"/>
+    <path android:fillColor="#00000000" android:pathData="M89,0L89,108"
+          android:strokeColor="#33FFFFFF" android:strokeWidth="0.8"/>
+    <path android:fillColor="#00000000" android:pathData="M99,0L99,108"
+          android:strokeColor="#33FFFFFF" android:strokeWidth="0.8"/>
+    <path android:fillColor="#00000000" android:pathData="M0,9L108,9"
+          android:strokeColor="#33FFFFFF" android:strokeWidth="0.8"/>
+    <path android:fillColor="#00000000" android:pathData="M0,19L108,19"
+          android:strokeColor="#33FFFFFF" android:strokeWidth="0.8"/>
+    <path android:fillColor="#00000000" android:pathData="M0,29L108,29"
+          android:strokeColor="#33FFFFFF" android:strokeWidth="0.8"/>
+    <path android:fillColor="#00000000" android:pathData="M0,39L108,39"
+          android:strokeColor="#33FFFFFF" android:strokeWidth="0.8"/>
+    <path android:fillColor="#00000000" android:pathData="M0,49L108,49"
+          android:strokeColor="#33FFFFFF" android:strokeWidth="0.8"/>
+    <path android:fillColor="#00000000" android:pathData="M0,59L108,59"
+          android:strokeColor="#33FFFFFF" android:strokeWidth="0.8"/>
+    <path android:fillColor="#00000000" android:pathData="M0,69L108,69"
+          android:strokeColor="#33FFFFFF" android:strokeWidth="0.8"/>
+    <path android:fillColor="#00000000" android:pathData="M0,79L108,79"
+          android:strokeColor="#33FFFFFF" android:strokeWidth="0.8"/>
+    <path android:fillColor="#00000000" android:pathData="M0,89L108,89"
+          android:strokeColor="#33FFFFFF" android:strokeWidth="0.8"/>
+    <path android:fillColor="#00000000" android:pathData="M0,99L108,99"
+          android:strokeColor="#33FFFFFF" android:strokeWidth="0.8"/>
+    <path android:fillColor="#00000000" android:pathData="M19,29L89,29"
+          android:strokeColor="#33FFFFFF" android:strokeWidth="0.8"/>
+    <path android:fillColor="#00000000" android:pathData="M19,39L89,39"
+          android:strokeColor="#33FFFFFF" android:strokeWidth="0.8"/>
+    <path android:fillColor="#00000000" android:pathData="M19,49L89,49"
+          android:strokeColor="#33FFFFFF" android:strokeWidth="0.8"/>
+    <path android:fillColor="#00000000" android:pathData="M19,59L89,59"
+          android:strokeColor="#33FFFFFF" android:strokeWidth="0.8"/>
+    <path android:fillColor="#00000000" android:pathData="M19,69L89,69"
+          android:strokeColor="#33FFFFFF" android:strokeWidth="0.8"/>
+    <path android:fillColor="#00000000" android:pathData="M19,79L89,79"
+          android:strokeColor="#33FFFFFF" android:strokeWidth="0.8"/>
+    <path android:fillColor="#00000000" android:pathData="M29,19L29,89"
+          android:strokeColor="#33FFFFFF" android:strokeWidth="0.8"/>
+    <path android:fillColor="#00000000" android:pathData="M39,19L39,89"
+          android:strokeColor="#33FFFFFF" android:strokeWidth="0.8"/>
+    <path android:fillColor="#00000000" android:pathData="M49,19L49,89"
+          android:strokeColor="#33FFFFFF" android:strokeWidth="0.8"/>
+    <path android:fillColor="#00000000" android:pathData="M59,19L59,89"
+          android:strokeColor="#33FFFFFF" android:strokeWidth="0.8"/>
+    <path android:fillColor="#00000000" android:pathData="M69,19L69,89"
+          android:strokeColor="#33FFFFFF" android:strokeWidth="0.8"/>
+    <path android:fillColor="#00000000" android:pathData="M79,19L79,89"
+          android:strokeColor="#33FFFFFF" android:strokeWidth="0.8"/>
+</vector>

ELearningApp/app/src/main/res/layout/activity_attendence.xml

+<?xml version="1.0" encoding="utf-8"?>
+<LinearLayout
+    xmlns:android="http://schemas.android.com/apk/res/android"
+    xmlns:tools="http://schemas.android.com/tools"
+    android:layout_width="match_parent"
+    android:layout_height="match_parent"
+    android:orientation="vertical"
+    android:background="@drawable/appbackground"
+    tools:context=".MainActivity">
+
+    <LinearLayout
+        android:layout_width="match_parent"
+        android:layout_height="0dp"
+        android:layout_weight="1">
+        <Spinner
+            android:id="@+id/spinner1"
+            android:layout_width="match_parent"
+            android:layout_height="wrap_content"
+            android:background="@android:drawable/btn_dropdown"
+            android:spinnerMode="dropdown"/>
+
+    </LinearLayout>
+    <LinearLayout
+        android:layout_width="match_parent"
+        android:layout_height="0dp"
+        android:layout_weight="1">
+        <TextView
+            android:id="@+id/tvsubject"
+            android:layout_width="0dp"
+            android:layout_weight="3"
+            android:layout_height="match_parent"
+            android:gravity="center"
+            android:textStyle="bold"
+            android:text="Absent"
+            android:textSize="@dimen/_15ssp"/>
+    </LinearLayout>
+
+
+    <LinearLayout
+        android:layout_width="match_parent"
+        android:layout_height="0dp"
+        android:layout_weight="2">
+
+
+
+    <org.eazegraph.lib.charts.PieChart
+        xmlns:app="http://schemas.android.com/apk/res-auto"
+        android:id="@+id/piechart"
+        android:layout_width="match_parent"
+        android:layout_height="match_parent"
+        android:padding="6dp"
+        android:layout_weight="1"
+        android:layout_marginTop="15dp"
+        android:layout_marginLeft="15dp"
+        android:layout_marginBottom="15dp" />
+    </LinearLayout>
+    <LinearLayout
+        android:layout_width="match_parent"
+        android:layout_height="0dp"
+        android:orientation="horizontal"
+        android:layout_weight="1">
+        <LinearLayout
+            android:layout_width="0dp"
+            android:layout_height="match_parent"
+
+            android:layout_weight="1"/>
+        <LinearLayout
+            android:layout_width="0dp"
+            android:layout_height="match_parent"
+            android:layout_weight="1"
+            android:orientation="vertical">
+
+            <LinearLayout
+                android:layout_width="match_parent"
+                android:layout_height="0dp"
+                android:orientation="horizontal"
+                android:layout_weight="1">
+
+                <LinearLayout
+                    android:layout_width="0dp"
+                    android:layout_weight="1"
+                    android:gravity="center"
+                    android:layout_height="match_parent">
+                    <View
+                        android:layout_width="@dimen/_20sdp"
+                        android:layout_height="@dimen/_20sdp"
+                        android:background="@color/button_green"
+                        android:layout_marginLeft="20dp"
+                        android:layout_marginRight="20dp" />
+                </LinearLayout>
+                <TextView
+                    android:layout_width="0dp"
+                    android:layout_weight="3"
+                    android:layout_height="match_parent"
+                    android:gravity="center"
+                    android:textStyle="bold"
+                    android:text="Present"
+                    android:textSize="@dimen/_12ssp"/>
+            </LinearLayout>
+            <LinearLayout
+                android:layout_width="match_parent"
+                android:layout_height="0dp"
+                android:orientation="horizontal"
+                android:layout_weight="1">
+
+                <LinearLayout
+                    android:layout_width="0dp"
+                    android:layout_weight="1"
+                    android:gravity="center"
+                    android:layout_height="match_parent">
+                    <View
+                        android:layout_width="@dimen/_20sdp"
+                        android:layout_height="@dimen/_20sdp"
+                        android:background="@color/colorAccent"
+                        android:layout_marginLeft="20dp"
+                        android:layout_marginRight="20dp" />
+                </LinearLayout>
+                <TextView
+                    android:layout_width="0dp"
+                    android:layout_weight="3"
+                    android:layout_height="match_parent"
+                    android:gravity="center"
+                    android:textStyle="bold"
+                    android:text="Absent"
+                    android:textSize="@dimen/_12ssp"/>
+
+            </LinearLayout>
+        </LinearLayout>
+
+        <LinearLayout
+            android:layout_width="0dp"
+            android:layout_height="match_parent"
+
+            android:layout_weight="1"/>
+    </LinearLayout>
+    <LinearLayout
+        android:layout_marginStart="@dimen/_20sdp"
+        android:layout_marginEnd="@dimen/_20sdp"
+        android:layout_width="match_parent"
+        android:layout_height="0dp"
+        android:layout_weight="1"
+        android:orientation="horizontal">
+        <LinearLayout
+            android:layout_width="0dp"
+            android:layout_height="match_parent"
+            android:orientation="vertical"
+            android:gravity="center"
+            android:layout_weight="1">
+            <TextView
+                android:layout_width="match_parent"
+                android:layout_weight="1"
+                android:layout_height="0dp"
+                android:gravity="center"
+                android:textStyle="bold"
+                android:text="Total Sessions"
+                android:textSize="@dimen/_12ssp"/>
+            <TextView
+                android:background="@color/white"
+                android:id="@+id/tvTotal"
+                android:layout_width="match_parent"
+                android:layout_weight="1"
+                android:layout_height="0dp"
+                android:gravity="center"
+                android:textStyle="bold"
+                android:text="0"
+                android:textSize="@dimen/_12ssp"/>
+
+        </LinearLayout>
+        <LinearLayout
+            android:layout_width="0dp"
+            android:layout_height="match_parent"
+            android:orientation="vertical"
+            android:gravity="center"
+            android:layout_weight="1">
+            <TextView
+                android:layout_width="match_parent"
+                android:layout_weight="1"
+                android:layout_height="0dp"
+                android:gravity="center"
+                android:textStyle="bold"
+                android:text="Present"
+                android:textSize="@dimen/_12ssp"/>
+            <TextView
+                android:background="@color/white"
+                android:id="@+id/tvPresent"
+                android:layout_width="match_parent"
+                android:layout_weight="1"
+                android:layout_height="0dp"
+                android:gravity="center"
+                android:textStyle="bold"
+                android:text="0"
+                android:textSize="@dimen/_12ssp"/>
+        </LinearLayout>
+        <LinearLayout
+            android:layout_width="0dp"
+            android:layout_height="match_parent"
+            android:orientation="vertical"
+            android:gravity="center"
+            android:layout_weight="1">
+            <TextView
+                android:layout_width="match_parent"
+                android:layout_weight="1"
+                android:layout_height="0dp"
+                android:gravity="center"
+                android:textStyle="bold"
+                android:text="Absent"
+                android:textSize="@dimen/_12ssp"/>
+            <TextView
+                android:background="@color/white"
+                android:id="@+id/tvAbsent"
+                android:layout_width="match_parent"
+                android:layout_weight="1"
+                android:layout_height="0dp"
+                android:gravity="center"
+                android:textStyle="bold"
+                android:text="0"
+                android:textSize="@dimen/_12ssp"/>
+        </LinearLayout>
+
+
+    </LinearLayout>
+    <LinearLayout
+        android:layout_width="match_parent"
+        android:layout_height="0dp"
+        android:layout_weight="1"/>
+
+
+</LinearLayout>
\ No newline at end of file

ELearningApp/app/src/main/res/layout/activity_class_add.xml

+<?xml version="1.0" encoding="utf-8"?>
+<androidx.constraintlayout.widget.ConstraintLayout xmlns:android="http://schemas.android.com/apk/res/android"
+    xmlns:app="http://schemas.android.com/apk/res-auto"
+    xmlns:tools="http://schemas.android.com/tools"
+    android:layout_width="match_parent"
+    android:layout_height="match_parent"
+    android:background="@drawable/appbackground"
+    tools:context=".ClassEditActivity">
+
+    <LinearLayout
+        android:id="@+id/linearLayout"
+        android:layout_width="match_parent"
+        android:layout_height="wrap_content"
+        android:layout_margin="@dimen/_30sdp"
+        android:background="@drawable/white_curved"
+        android:padding="@dimen/_5sdp"
+        app:layout_constraintBottom_toBottomOf="parent"
+        app:layout_constraintEnd_toEndOf="parent"
+        app:layout_constraintHorizontal_bias="0.5"
+        app:layout_constraintStart_toStartOf="parent"
+        app:layout_constraintTop_toTopOf="parent">
+
+        <LinearLayout
+            android:layout_width="0dp"
+            android:layout_height="match_parent"
+            android:layout_weight="2"
+            android:orientation="vertical">
+
+            <TextView
+                android:layout_width="match_parent"
+                android:layout_height="0dp"
+                android:layout_weight="1"
+                android:text="Subject"
+                android:gravity="center"
+                android:textSize="@dimen/_14ssp"
+                android:textStyle="bold" />
+
+            <TextView
+                android:layout_width="match_parent"
+                android:layout_height="0dp"
+                android:layout_weight="1"
+                android:text="Date"
+                android:gravity="center"
+                android:textSize="@dimen/_14ssp"
+                android:textStyle="bold" />
+
+            <TextView
+                android:layout_width="match_parent"
+                android:layout_height="0dp"
+                android:layout_weight="1"
+                android:text="Class Time"
+                android:gravity="center"
+                android:textSize="@dimen/_14ssp"
+                android:textStyle="bold" />
+
+
+        </LinearLayout>
+
+        <LinearLayout
+            android:layout_width="0dp"
+            android:layout_height="match_parent"
+            android:layout_weight="2"
+            android:orientation="vertical">
+
+            <EditText
+                android:id="@+id/etsubject"
+                android:layout_width="match_parent"
+                android:layout_height="0dp"
+                android:maxLines="1"
+                android:layout_weight="1"
+                android:gravity="center_vertical"
+                android:textSize="@dimen/_14ssp" />
+
+            <EditText
+                android:id="@+id/etdate"
+                android:layout_width="match_parent"
+                android:layout_height="0dp"
+                android:layout_weight="1"
+                android:clickable="false"
+                android:cursorVisible="false"
+                android:focusable="false"
+                android:focusableInTouchMode="false"
+                android:gravity="center_vertical"
+                android:textSize="@dimen/_14ssp" />
+
+            <EditText
+                android:id="@+id/etclasstime"
+                android:layout_width="match_parent"
+                android:layout_height="0dp"
+                android:layout_weight="1"
+                android:clickable="false"
+                android:cursorVisible="false"
+                android:focusable="false"
+                android:focusableInTouchMode="false"
+                android:gravity="center_vertical"
+                android:textSize="@dimen/_14ssp" />
+
+
+        </LinearLayout>
+    </LinearLayout>
+
+    <com.google.android.material.button.MaterialButton
+        android:id="@+id/btn_add"
+        android:layout_width="match_parent"
+        android:layout_height="wrap_content"
+        android:layout_marginLeft="@dimen/_50sdp"
+        android:layout_marginRight="@dimen/_50sdp"
+        android:stateListAnimator="@null"
+        android:text="ADD"
+        android:textAllCaps="false"
+        android:textColor="@color/white"
+        app:backgroundTint="@color/colorPrimaryAccentBlue"
+        app:cornerRadius="7dp"
+        app:layout_constraintEnd_toEndOf="parent"
+        app:layout_constraintHorizontal_bias="0.5"
+        app:layout_constraintStart_toStartOf="parent"
+        app:layout_constraintTop_toBottomOf="@+id/linearLayout" />
+</androidx.constraintlayout.widget.ConstraintLayout>
\ No newline at end of file

ELearningApp/app/src/main/res/layout/activity_class_detail_activty.xml

+<?xml version="1.0" encoding="utf-8"?>
+<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
+    xmlns:app="http://schemas.android.com/apk/res-auto"
+    xmlns:tools="http://schemas.android.com/tools"
+    android:layout_width="match_parent"
+    android:layout_height="match_parent"
+    android:background="@drawable/appbackground"
+    android:orientation="vertical"
+    tools:context=".ClassDetailActivty">
+
+    <com.google.android.material.button.MaterialButton
+        android:id="@+id/btn_add"
+        android:layout_width="match_parent"
+        android:layout_height="wrap_content"
+        android:letterSpacing="0"
+        android:stateListAnimator="@null"
+        android:text="ADD"
+        android:textAllCaps="false"
+        android:textColor="@color/white"
+        app:backgroundTint="@color/colorPrimaryAccentBlue"
+        app:cornerRadius="7dp" />
+
+    <androidx.recyclerview.widget.RecyclerView
+        android:id="@+id/rvDetails"
+        android:layout_width="match_parent"
+        android:layout_height="0dp"
+        android:layout_marginTop="@dimen/_2sdp"
+        android:layout_weight="15" />
+</LinearLayout>
\ No newline at end of file

ELearningApp/app/src/main/res/layout/activity_class_edit.xml

+<?xml version="1.0" encoding="utf-8"?>
+<androidx.constraintlayout.widget.ConstraintLayout xmlns:android="http://schemas.android.com/apk/res/android"
+    xmlns:app="http://schemas.android.com/apk/res-auto"
+    xmlns:tools="http://schemas.android.com/tools"
+    android:layout_width="match_parent"
+    android:layout_height="match_parent"
+    android:background="@drawable/appbackground"
+    tools:context=".ClassEditActivity">
+
+    <LinearLayout
+        android:layout_width="match_parent"
+        android:layout_height="wrap_content"
+        app:layout_constraintBottom_toBottomOf="parent"
+        app:layout_constraintEnd_toEndOf="parent"
+        app:layout_constraintHorizontal_bias="0.5"
+        android:layout_margin="@dimen/_30sdp"
+        android:padding="@dimen/_5sdp"
+        android:background="@drawable/grey_back_curved"
+        app:layout_constraintStart_toStartOf="parent"
+        app:layout_constraintTop_toTopOf="parent">
+
+        <LinearLayout
+            android:layout_width="0dp"
+            android:layout_height="match_parent"
+            android:layout_weight="2"
+            android:orientation="vertical">
+            <TextView
+                android:layout_width="match_parent"
+                android:layout_weight="1"
+                android:layout_height="0dp"
+                android:textStyle="bold"
+                android:text="Subject"
+                android:gravity="center"
+                android:textSize="@dimen/_14ssp"/>
+            <TextView
+                android:layout_width="match_parent"
+                android:layout_weight="1"
+                android:layout_height="0dp"
+                android:textStyle="bold"
+                android:gravity="center"
+                android:text="Date"
+                android:textSize="@dimen/_14ssp"/>
+            <TextView
+                android:layout_width="match_parent"
+                android:layout_weight="1"
+                android:layout_height="0dp"
+                android:textStyle="bold"
+                android:gravity="center"
+                android:text="Class Time"
+                android:textSize="@dimen/_14ssp"/>
+            <TextView
+                android:layout_width="match_parent"
+                android:layout_weight="1"
+                android:layout_height="0dp"
+                android:textStyle="bold"
+                android:gravity="center"
+                android:text="Students"
+                android:textSize="@dimen/_14ssp"/>
+            <com.google.android.material.button.MaterialButton
+                android:id="@+id/btn_Delete"
+                android:layout_width="match_parent"
+                android:layout_weight="1"
+                android:layout_height="0dp"
+                android:letterSpacing="0"
+                android:stateListAnimator="@null"
+                android:text="DELETE"
+                android:textAllCaps="false"
+                android:textColor="@color/white"
+                android:textSize="@dimen/_10ssp"
+                app:backgroundTint="@color/colorAccent"
+                app:cornerRadius="7dp" />
+
+        </LinearLayout>
+        <LinearLayout
+            android:layout_width="0dp"
+            android:layout_height="match_parent"
+            android:layout_weight="2"
+            android:orientation="vertical">
+            <EditText
+                android:id="@+id/etsubject1"
+                android:layout_width="match_parent"
+                android:layout_height="0dp"
+                android:maxLines="1"
+                android:layout_weight="1"
+                android:gravity="center_vertical"
+                android:textSize="@dimen/_14ssp" />
+
+            <EditText
+                android:id="@+id/etdate1"
+                android:layout_width="match_parent"
+                android:layout_height="0dp"
+                android:layout_weight="1"
+                android:clickable="false"
+                android:cursorVisible="false"
+                android:focusable="false"
+                android:focusableInTouchMode="false"
+                android:gravity="center_vertical"
+                android:textSize="@dimen/_14ssp" />
+
+            <EditText
+                android:id="@+id/etclasstime1"
+                android:layout_width="match_parent"
+                android:layout_height="0dp"
+                android:layout_weight="1"
+                android:clickable="false"
+                android:cursorVisible="false"
+                android:focusable="false"
+                android:focusableInTouchMode="false"
+                android:gravity="center_vertical"
+                android:textSize="@dimen/_14ssp" />
+            <com.google.android.material.button.MaterialButton
+                android:id="@+id/btn_add"
+                android:layout_width="match_parent"
+                android:layout_height="0dp"
+                android:layout_weight="1"
+                android:letterSpacing="0"
+                android:stateListAnimator="@null"
+                android:text="Add Students"
+                android:textAllCaps="false"
+                android:textColor="@color/white"
+                app:backgroundTint="@color/button_green"
+                app:cornerRadius="7dp" />
+            <com.google.android.material.button.MaterialButton
+                android:id="@+id/btn_edit"
+                android:layout_width="match_parent"
+                android:layout_height="0dp"
+                android:layout_weight="1"
+                android:letterSpacing="0"
+                android:stateListAnimator="@null"
+                android:text="EDIT"
+                android:textAllCaps="false"
+                android:textColor="@color/white"
+                app:backgroundTint="@color/colorPrimaryAccentBlue"
+                app:cornerRadius="7dp" />
+
+        </LinearLayout>
+    </LinearLayout>
+
+</androidx.constraintlayout.widget.ConstraintLayout>
\ No newline at end of file

ELearningApp/app/src/main/res/layout/activity_home.xml

+<?xml version="1.0" encoding="utf-8"?>
+<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
+    xmlns:app="http://schemas.android.com/apk/res-auto"
+    xmlns:tools="http://schemas.android.com/tools"
+    android:layout_width="match_parent"
+    android:layout_height="match_parent"
+    android:background="@drawable/appbackground"
+    android:orientation="vertical"
+    tools:context=".HomeActivity">
+    <LinearLayout
+        android:layout_width="match_parent"
+        android:layout_height="0dp"
+        android:layout_weight="1"/>
+    <LinearLayout
+        android:layout_width="match_parent"
+        android:layout_height="0dp"
+        android:orientation="horizontal"
+        android:layout_weight="2"
+        android:padding="@dimen/_5sdp">
+        <LinearLayout
+            android:id="@+id/llbutton1"
+            android:layout_width="0dp"
+            android:layout_height="match_parent"
+            android:layout_weight="1">
+
+            <LinearLayout
+                android:layout_width="match_parent"
+                android:layout_height="match_parent"
+                android:background="@drawable/white_curved"
+                android:orientation="vertical"
+                android:gravity="center"
+                android:padding="@dimen/_5sdp"
+                android:layout_margin="@dimen/_3sdp">
+                <ImageView
+                    android:id="@+id/ivbutton1"
+                    android:layout_width="match_parent"
+                    android:layout_height="0dp"
+                    android:layout_weight="2"
+                    android:layout_gravity="center"
+                    android:scaleType="fitCenter"
+                    />
+
+                <com.google.android.material.button.MaterialButton
+                    android:id="@+id/ttbutton1"
+                    android:layout_width="match_parent"
+                    android:layout_height="0dp"
+                    android:layout_weight="1"
+                    android:gravity="center"
+                    android:letterSpacing="0"
+                    android:stateListAnimator="@null"
+                    android:text="Login"
+                    android:textAllCaps="false"
+                    android:textColor="@color/white"
+                    app:backgroundTint="@color/colorPrimaryAccentBlue"
+                    app:cornerRadius="7dp" />
+
+            </LinearLayout>
+        </LinearLayout>
+
+        <LinearLayout
+            android:id="@+id/llbutton2"
+            android:layout_width="0dp"
+            android:layout_height="match_parent"
+            android:layout_weight="1">
+
+            <LinearLayout
+
+                android:layout_width="match_parent"
+                android:layout_height="match_parent"
+                android:background="@drawable/white_curved"
+                android:orientation="vertical"
+                android:gravity="center"
+                android:padding="@dimen/_5sdp"
+                android:layout_margin="@dimen/_3sdp">
+                <ImageView
+                    android:id="@+id/ivbutton2"
+                    android:layout_width="match_parent"
+                    android:layout_height="0dp"
+                    android:layout_weight="2"
+                    android:layout_gravity="center"
+                    android:scaleType="fitCenter" />
+
+                <com.google.android.material.button.MaterialButton
+                    android:id="@+id/ttbutton2"
+                    android:layout_width="match_parent"
+                    android:layout_height="0dp"
+                    android:layout_weight="1"
+                    android:gravity="center"
+                    android:letterSpacing="0"
+                    android:stateListAnimator="@null"
+                    android:text="Login"
+                    android:textAllCaps="false"
+                    android:textColor="@color/white"
+                    app:backgroundTint="@color/colorPrimaryAccentBlue"
+                    app:cornerRadius="7dp" />
+
+            </LinearLayout>
+    </LinearLayout>
+    </LinearLayout>
+    <LinearLayout
+        android:layout_width="match_parent"
+        android:layout_height="0dp"
+        android:orientation="horizontal"
+        android:layout_weight="2"
+        android:padding="@dimen/_5sdp">
+
+        <LinearLayout
+            android:id="@+id/llbutton3"
+            android:layout_width="0dp"
+            android:layout_height="match_parent"
+            android:layout_weight="1">
+
+            <LinearLayout
+                android:layout_width="match_parent"
+                android:layout_height="match_parent"
+                android:background="@drawable/white_curved"
+                android:orientation="vertical"
+                android:gravity="center"
+                android:padding="@dimen/_5sdp"
+                android:layout_margin="@dimen/_3sdp">
+                <ImageView
+                    android:id="@+id/ivbutton3"
+                    android:layout_width="match_parent"
+                    android:layout_height="0dp"
+                    android:layout_weight="2"
+                    android:layout_gravity="center"
+                    android:scaleType="fitCenter" />
+
+                <com.google.android.material.button.MaterialButton
+                    android:id="@+id/ttbutton3"
+                    android:layout_width="match_parent"
+                    android:layout_height="0dp"
+                    android:layout_weight="1"
+                    android:gravity="center"
+                    android:letterSpacing="0"
+                    android:stateListAnimator="@null"
+                    android:text="Login"
+                    android:textAllCaps="false"
+                    android:textColor="@color/white"
+                    app:backgroundTint="@color/colorPrimaryAccentBlue"
+                    app:cornerRadius="7dp" />
+
+            </LinearLayout>
+    </LinearLayout>
+        <LinearLayout
+            android:id="@+id/llbutton4"
+            android:layout_width="0dp"
+            android:layout_height="match_parent"
+            android:layout_weight="1">
+            <LinearLayout
+                android:layout_width="match_parent"
+                android:layout_height="match_parent"
+                android:background="@drawable/white_curved"
+                android:orientation="vertical"
+                android:gravity="center"
+                android:padding="@dimen/_5sdp"
+                android:layout_margin="@dimen/_3sdp">
+                <ImageView
+                    android:id="@+id/ivbutton4"
+                    android:layout_width="match_parent"
+                    android:layout_height="0dp"
+                    android:layout_weight="2"
+                    android:layout_gravity="center"
+                    android:scaleType="fitCenter"/>
+
+                <com.google.android.material.button.MaterialButton
+                    android:id="@+id/ttbutton4"
+                    android:layout_width="match_parent"
+                    android:layout_height="0dp"
+                    android:layout_weight="1"
+                    android:gravity="center"
+                    android:letterSpacing="0"
+                    android:stateListAnimator="@null"
+                    android:text="Login"
+                    android:textAllCaps="false"
+                    android:textColor="@color/white"
+                    app:backgroundTint="@color/colorPrimaryAccentBlue"
+                    app:cornerRadius="7dp" />
+
+            </LinearLayout>
+    </LinearLayout>
+    </LinearLayout>
+
+    <LinearLayout
+        android:layout_width="match_parent"
+        android:layout_height="0dp"
+        android:layout_weight="1"/>
+
+
+</LinearLayout>
\ No newline at end of file

ELearningApp/app/src/main/res/layout/activity_tutor_join.xml

+<?xml version="1.0" encoding="utf-8"?>
+<androidx.constraintlayout.widget.ConstraintLayout xmlns:android="http://schemas.android.com/apk/res/android"
+    xmlns:app="http://schemas.android.com/apk/res-auto"
+    xmlns:tools="http://schemas.android.com/tools"
+    android:layout_width="match_parent"
+    android:layout_height="match_parent"
+    tools:context=".TutorJoinActivity">
+    <androidx.camera.view.PreviewView
+        android:id="@+id/previewView"
+        android:layout_width="fill_parent"
+        android:layout_height="fill_parent"
+        app:layout_constraintBottom_toBottomOf="parent"
+        app:layout_constraintEnd_toEndOf="parent"
+        app:layout_constraintHorizontal_bias="0.5"
+        app:layout_constraintStart_toStartOf="parent"
+        app:layout_constraintTop_toTopOf="parent" />
+</androidx.constraintlayout.widget.ConstraintLayout>
\ No newline at end of file