Shapes Identification part - development

ShapesClassification/ShapesClassification/.gitignore

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

ShapesClassification/ShapesClassification/app/.gitignore

+/build

ShapesClassification/ShapesClassification/app/build.gradle

+apply plugin: 'com.android.application'
+
+android {
+    compileSdkVersion 30
+    defaultConfig {
+        applicationId "scit.shapesclassification"
+        minSdkVersion 23
+        targetSdkVersion 30
+        versionCode 1
+        versionName "1.0"
+        testInstrumentationRunner 'androidx.test.runner.AndroidJUnitRunner'
+    }
+    buildTypes {
+        release {
+            minifyEnabled false
+            proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro'
+        }
+    }
+
+    aaptOptions {
+        noCompress "tflite"
+        noCompress "lite"
+    }
+}
+
+repositories {
+    maven {
+        url 'https://google.bintray.com/tensorflow'
+    }
+    google()
+}
+
+
+
+dependencies {
+    implementation fileTree(dir: 'libs', include: ['*.jar'])
+    implementation 'androidx.appcompat:appcompat:1.0.0'
+    implementation 'com.google.android.material:material:1.0.0'
+    implementation 'androidx.constraintlayout:constraintlayout:1.1.3'
+    testImplementation 'junit:junit:4.12'
+    androidTestImplementation 'androidx.test.ext:junit:1.1.1'
+    androidTestImplementation 'androidx.test.espresso:espresso-core:3.1.0'
+
+    implementation 'org.tensorflow:tensorflow-lite:+'
+
+}
+

ShapesClassification/ShapesClassification/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

ShapesClassification/ShapesClassification/app/src/androidTest/java/scit/shapesclassification/ExampleInstrumentedTest.java

+package scit.shapesclassification;
+
+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.getTargetContext();
+
+        assertEquals("jtheiner.drawingclassification", appContext.getPackageName());
+    }
+}

ShapesClassification/ShapesClassification/app/src/main/AndroidManifest.xml

+<?xml version="1.0" encoding="utf-8"?>
+<manifest xmlns:android="http://schemas.android.com/apk/res/android"
+    package="scit.shapesclassification">
+
+    <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/AppTheme">MainActivity
+        <activity android:name=".MainActivity"></activity>
+        <activity android:name=".DashboardActivity">
+            <intent-filter>
+                <action android:name="android.intent.action.MAIN" />
+
+                <category android:name="android.intent.category.LAUNCHER" />
+            </intent-filter>
+        </activity>
+        <activity
+            android:name=".MatchShapes"
+            android:label="Match shapes"
+            android:parentActivityName=".MainActivity" />
+    </application>
+
+</manifest>
\ No newline at end of file

ShapesClassification/ShapesClassification/app/src/main/assets/shape3/labels.csv

+0,circle
+1,square
+2,triangle

ShapesClassification/ShapesClassification/app/src/main/java/scit/shapesclassification/DashboardActivity.java

+package scit.shapesclassification;
+
+import androidx.appcompat.app.AppCompatActivity;
+
+import android.content.Intent;
+import android.os.Bundle;
+import android.view.View;
+import android.widget.ImageButton;
+
+public class DashboardActivity extends AppCompatActivity {
+
+    ImageButton ImgButton;
+
+    @Override
+    protected void onCreate(Bundle savedInstanceState) {
+        super.onCreate(savedInstanceState);
+        setContentView(R.layout.activity_dashboard);
+
+        ImageButton Btnshapesmatch = (ImageButton) findViewById(R.id.btn2);
+
+        Btnshapesmatch.setOnClickListener(new View.OnClickListener() {
+            @Override
+            public void onClick(View view) {
+                Intent intent = new Intent(getApplicationContext(),MatchShapes.class);
+                startActivity(intent);
+            }
+        });
+
+        ImageButton Btnshapeidentification = (ImageButton) findViewById(R.id.Btn1);
+
+        Btnshapeidentification.setOnClickListener(new View.OnClickListener() {
+            @Override
+            public void onClick(View view) {
+                Intent intent = new Intent(getApplicationContext(),MainActivity.class);
+                startActivity(intent);
+            }
+        });
+    }
+}
\ No newline at end of file

ShapesClassification/ShapesClassification/app/src/main/java/scit/shapesclassification/MainActivity.java

+package scit.shapesclassification;
+
+
+import android.app.Dialog;
+import android.content.DialogInterface;
+import android.graphics.Bitmap;
+import android.graphics.Color;
+import android.graphics.drawable.ColorDrawable;
+import android.os.Bundle;
+import androidx.appcompat.app.AppCompatActivity;
+import android.util.Log;
+import android.view.View;
+import android.view.ViewGroup;
+import android.view.Window;
+import android.widget.ImageView;
+import android.widget.RelativeLayout;
+import android.widget.TextView;
+
+import java.io.IOException;
+import java.util.Random;
+
+import scit.shapesclassification.classification.ImageClassifier;
+import scit.shapesclassification.classification.Result;
+
+
+public class MainActivity extends AppCompatActivity {
+
+    private View mainView;
+    private PaintView paintView; // custom drawing view
+    private ImageClassifier classifier; // complete image classification
+
+    TextView textViewResult;
+    TextView textViewDraw;
+
+    @Override
+    protected void onCreate(Bundle savedInstanceState) {
+        super.onCreate(savedInstanceState);
+        setContentView(R.layout.activity_main);
+
+        paintView = (PaintView) findViewById(R.id.paintView);
+        paintView.init(); // initial drawing view
+
+        textViewResult = (TextView) findViewById(R.id.txt_result_label);
+        textViewDraw = (TextView) findViewById(R.id.txt_draw_label);
+
+
+        // instantiate classifier
+        try {
+            this.classifier = new ImageClassifier(this);
+        } catch (IOException e) {
+            Log.e("MainActivity", "Cannot initialize tfLite model!", e);
+            e.printStackTrace();
+        }
+
+        this.mainView = this.findViewById(R.id.activity_main).getRootView();
+
+        resetView();
+    }
+
+
+    public void onClearClick(View view) {
+        Log.i("MainActivity", "Clear sketch event triggers");
+        paintView.clear();
+
+    }
+
+    public void onDetectClick(View view) {
+        Log.i("MainActivity", "Detect sketch event triggers");
+        if (classifier == null) {
+            Log.e("MainActivity", "Cannot initialize tfLite model!");
+            return;
+        }
+
+
+        Bitmap sketch = paintView.getNormalizedBitmap(); // get resized bitmap
+
+        //showImage(paintView.scaleBitmap(40, sketch));
+
+        // create the result
+        Result result = classifier.classify(sketch);
+
+
+        // render results
+        textViewResult.setText("");
+        for (int index : result.getTopK()) {
+            textViewResult.setText(
+                    textViewResult.getText()
+                    +"\n"
+                    +classifier.getLabel(index)
+                    + " ("
+                    + String.format("%.02f", classifier.getProbability(index) * 100)
+                    + "%)"
+            );
+        }
+
+        int expectedIndex = classifier.getExpectedIndex();
+        if (result.getTopK().contains(expectedIndex)) {
+            mainView.setBackgroundColor(Color.rgb(78,175,36));
+        } else {
+            mainView.setBackgroundColor(Color.rgb(204, 0,0));
+        }
+
+
+    }
+
+
+    public void onNextClick(View view) {
+        resetView();
+    }
+
+    // debug: ImageView with rescaled 28x28 bitmap
+    private void showImage(Bitmap bitmap) {
+        Dialog builder = new Dialog(this);
+        builder.requestWindowFeature(Window.FEATURE_NO_TITLE);
+        builder.getWindow().setBackgroundDrawable(
+                new ColorDrawable(android.graphics.Color.TRANSPARENT));
+        builder.setOnDismissListener(new DialogInterface.OnDismissListener() {
+            @Override
+            public void onDismiss(DialogInterface dialogInterface) {
+            }
+        });
+
+        ImageView imageView = new ImageView(this);
+        imageView.setImageBitmap(bitmap);
+        builder.addContentView(imageView, new RelativeLayout.LayoutParams(
+                ViewGroup.LayoutParams.MATCH_PARENT,
+                ViewGroup.LayoutParams.MATCH_PARENT));
+        builder.show();
+    }
+
+
+    private void resetView() {
+        mainView.setBackgroundColor(Color.WHITE);
+        paintView.clear();
+        textViewResult.setText("");
+
+        // get a random label and set as expected class
+        classifier.setExpectedIndex(new Random().nextInt(classifier.getNumberOfClasses()));
+        textViewDraw.setText("අදින්න ... " + classifier.getLabel(classifier.getExpectedIndex()));
+
+    }
+
+
+
+
+}
\ No newline at end of file

ShapesClassification/ShapesClassification/app/src/main/java/scit/shapesclassification/MatchShapes.java

+package scit.shapesclassification;
+
+import android.content.Context;
+import android.content.Intent;
+import android.graphics.Canvas;
+import android.graphics.Color;
+import android.graphics.Paint;
+import android.graphics.Point;
+import android.os.Bundle;
+import android.view.LayoutInflater;
+import android.view.MotionEvent;
+import android.view.View;
+import android.view.ViewGroup;
+import android.widget.Button;
+import android.widget.RelativeLayout;
+import android.widget.TableLayout;
+import android.widget.TableRow;
+import android.widget.Toast;
+
+import androidx.appcompat.app.AppCompatActivity;
+import androidx.drawerlayout.widget.DrawerLayout;
+
+import java.util.ArrayList;
+
+public class MatchShapes extends AppCompatActivity {
+    public TableLayout t1;
+    public TableRow tr1;
+    public TableRow tr2;
+    public TableRow tr3;
+    public TableRow tr4;
+    public RelativeLayout r1;
+
+    @Override
+    protected void onCreate(Bundle savedInstanceState) {
+        super.onCreate(savedInstanceState);
+        setContentView(R.layout.activity_match_shapes);
+
+        t1 = findViewById(R.id.tableLayout1);
+        tr1 = (TableRow) findViewById(R.id.tableRow1);
+        tr2 = (TableRow) findViewById(R.id.tableRow2);
+        tr3 = (TableRow) findViewById(R.id.tableRow3);
+        tr4 = (TableRow) findViewById(R.id.tableRow4);
+        r1 = findViewById(R.id.RelativeLayout2);
+
+
+        Button btnRedo = findViewById(R.id.btnRedo);
+
+        btnRedo.setOnClickListener(new View.OnClickListener() {
+            @Override
+            public void onClick(View view) {
+                recreate();
+            }
+        });
+
+    }
+
+    @Override
+    public void onWindowFocusChanged(boolean hasFocus) {
+        super.onWindowFocusChanged(hasFocus);
+
+        RelativeLayout rl = findViewById(R.id.RelativeLayout2);
+        DrawPanel drawingPanel = new DrawPanel(getApplicationContext());
+        drawingPanel.setLayoutParams(new DrawerLayout.LayoutParams(rl.getWidth(), rl.getHeight()));
+        rl.addView(drawingPanel);
+
+    }
+
+
+    public class DrawPanel extends View {
+        private Paint paint;
+        int ans = 0;
+        String temp1 = "";
+        String temp2 = "";
+
+        private ArrayList<Point> points;
+
+        private ArrayList<ArrayList<Point>> strokes;
+
+        public DrawPanel(Context context) {
+            super(context);
+
+            points = new ArrayList<>();
+            strokes = new ArrayList<>();
+            paint = createPaint();
+
+        }
+
+        @Override
+        public void onDraw(Canvas c) {
+            super.onDraw(c);
+
+            for (ArrayList<Point> obj : strokes) {
+                drawStroke(obj, c);
+            }
+
+            drawStroke(points, c);
+
+        }
+
+        public void clearCanvas(){
+
+            invalidate();
+        }
+
+
+        @Override
+        public boolean onTouchEvent(MotionEvent event) {
+
+
+            if (event.getActionMasked() == MotionEvent.ACTION_MOVE) {
+                points.add(new Point((int) event.getX(), (int) event.getY()));
+                if (temp1.equals("")) {
+                    temp1 = getColor((int) event.getX(), (int) event.getY());
+                }
+                System.out.println("[start] " + temp1);
+
+                invalidate();
+            }
+
+            if (event.getActionMasked() == MotionEvent.ACTION_UP) {
+
+                temp2 = getColor((int) event.getX(), (int) event.getY());
+                System.out.println("[end] " + temp2);
+                if (temp1.equals(temp2) && !temp1.equals("")) {
+                        ans++;
+                    LayoutInflater inflater = getLayoutInflater();
+                    View toastLayout = inflater.inflate(R.layout.custom_toast1,(ViewGroup)findViewById(R.id.toast_root));
+                    Toast toast = new Toast(getApplicationContext());
+                    toast.setDuration(Toast.LENGTH_SHORT);
+                    toast.setView(toastLayout);
+                    toast.show();//correct answer
+                } else {
+                    LayoutInflater inflater = getLayoutInflater();
+                    View toastLayout = inflater.inflate(R.layout.custom_toast2,(ViewGroup)findViewById(R.id.toast_root2));
+                    Toast toast = new Toast(getApplicationContext());
+                    toast.setDuration(Toast.LENGTH_SHORT);
+                    toast.setView(toastLayout);
+                    toast.show();//incorrect answer
+                }
+
+
+
+                temp1 = "";
+                temp2 = "";
+
+                this.strokes.add(points);
+                points = new ArrayList<>();
+                invalidate();
+
+            }
+
+            return true;
+        }
+
+        public String getColor(int x, int y) {
+            for (int r = 0; r < t1.getChildCount(); r++) {
+                int y0 = (int) t1.getChildAt(r).getY();
+                int height = y0 + t1.getChildAt(r).getHeight();
+
+                if (y >= y0 && y < height) {
+
+                    for (int i = 0; i < 3; i += 2) {
+                        int x1 = (int) tr1.getChildAt(i).getX() - 50;
+                        int width = x1 + tr1.getChildAt(i).getWidth() + 50;
+                        if (x >= x1 && x < width) {
+
+                            return (String) (((TableRow) t1
+                                    .getChildAt(r))
+                                    .getChildAt(i)).getTag();
+                        }
+                    }
+                }
+            }
+            return "";
+        }
+
+        private void drawStroke(ArrayList<Point> stroke, Canvas c) {
+            if (stroke.size() > 0) {
+                Point p0 = stroke.get(0);
+                for (int i = 1; i < stroke.size(); i++) {
+                    Point p1 = stroke.get(i);
+                    c.drawLine(p0.x, p0.y, p1.x, p1.y, paint);
+                    p0 = p1;
+
+                }
+            }
+        }
+
+        private Paint createPaint() {
+            Paint temp = new Paint();
+            temp.setStyle(Paint.Style.STROKE);
+            temp.setAntiAlias(true);
+            temp.setColor(Color.BLACK);
+            temp.setStrokeWidth((float) 11);
+            temp.setStrokeCap(Paint.Cap.ROUND);
+
+            return temp;
+        }
+    }
+}

ShapesClassification/ShapesClassification/app/src/main/java/scit/shapesclassification/PaintView.java

+package scit.shapesclassification;
+
+
+
+import android.content.Context;
+import android.graphics.Bitmap;
+import android.graphics.Canvas;
+import android.graphics.Color;
+import android.graphics.Paint;
+import android.graphics.Path;
+import android.util.AttributeSet;
+import android.view.MotionEvent;
+import android.view.View;
+
+
+import java.util.ArrayList;
+
+import scit.shapesclassification.classification.ImageClassifier;
+
+
+/**
+  Custom view class to draw sketches using bitmaps
+ */
+public class PaintView extends View {
+
+
+    public static int BRUSH_SIZE = 50;
+    public static final int DEFAULT_COLOR = Color.WHITE;
+    public static final int DEFAULT_BG_COLOR = Color.BLACK;
+    private static final float TOUCH_TOLERANCE = 4;
+
+    // original size of PaintView
+    public int WIDTH;
+    public int HEIGHT;
+
+    private float mX, mY;
+    private Path mPath;
+    private Paint mPaint;
+    private ArrayList<PenPath> paths = new ArrayList<>();
+    private Bitmap mBitmap;
+    private Canvas mCanvas;
+    private Paint mBitmapPaint = new Paint(Paint.DITHER_FLAG);
+
+    public PaintView(Context context) {
+        this(context, null);
+    }
+
+    public PaintView(Context context, AttributeSet attrs) {
+        super(context, attrs);
+        mPaint = new Paint();
+        mPaint.setAntiAlias(true);
+        mPaint.setDither(true);
+        mPaint.setColor(DEFAULT_COLOR);
+        mPaint.setStyle(Paint.Style.STROKE);
+        mPaint.setStrokeJoin(Paint.Join.ROUND);
+        mPaint.setStrokeCap(Paint.Cap.ROUND);
+        mPaint.setXfermode(null);
+        mPaint.setAlpha(0xff);
+    }
+
+    public void init() {
+        this.WIDTH = this.getLayoutParams().width;
+        this.HEIGHT = this.getLayoutParams().height;
+        mBitmap = Bitmap.createBitmap(WIDTH, HEIGHT , Bitmap.Config.ARGB_8888);
+        mCanvas = new Canvas(mBitmap);
+    }
+
+    public void clear() {
+        paths.clear();
+        invalidate();
+    }
+
+    @Override
+    protected void onDraw(Canvas canvas) {
+        canvas.save();
+        mCanvas.drawColor(DEFAULT_BG_COLOR);
+
+        for (PenPath fp : paths) {
+            mPaint.setColor(fp.color);
+            mPaint.setStrokeWidth(fp.strokeWidth);
+            mPaint.setMaskFilter(null);
+            mCanvas.drawPath(fp.path, mPaint);
+        }
+
+        canvas.drawBitmap(mBitmap, 0, 0, mBitmapPaint);
+        canvas.restore();
+    }
+
+    private void touchStart(float x, float y) {
+        mPath = new Path();
+        PenPath fp = new PenPath(DEFAULT_COLOR, BRUSH_SIZE, mPath);
+        paths.add(fp);
+        mPath.reset();
+        mPath.moveTo(x, y);
+        mX = x;
+        mY = y;
+    }
+
+    private void touchMove(float x, float y) {
+        float dx = Math.abs(x - mX);
+        float dy = Math.abs(y - mY);
+
+        if (dx >= TOUCH_TOLERANCE || dy >= TOUCH_TOLERANCE) {
+            mPath.quadTo(mX, mY, (x + mX) / 2, (y + mY) / 2);
+            mX = x;
+            mY = y;
+        }
+    }
+
+    private void touchUp() {
+        mPath.lineTo(mX, mY);
+    }
+
+    @Override
+    public boolean onTouchEvent(MotionEvent event) {
+        float x = event.getX();
+        float y = event.getY();
+
+        switch(event.getAction()) {
+            case MotionEvent.ACTION_DOWN :
+                touchStart(x, y);
+                invalidate();
+                break;
+            case MotionEvent.ACTION_MOVE :
+                touchMove(x, y);
+                invalidate();
+                break;
+            case MotionEvent.ACTION_UP :
+                touchUp();
+                invalidate();
+                break;
+        }
+
+        return true;
+    }
+
+    public Bitmap getmBitmap() {
+        return this.mBitmap;
+    }
+
+    // scale given bitmap by a factor and return a new bitmap
+    public Bitmap scaleBitmap(int scaleFactor, Bitmap bitmap) {
+        return Bitmap.createScaledBitmap(bitmap, (int)(bitmap.getWidth()*scaleFactor), (int)(bitmap.getHeight()*scaleFactor), true);
+    }
+
+    // scale original bitmap down to network size (28x28)
+    public Bitmap getNormalizedBitmap() {
+        float scaleFactor = ImageClassifier.DIM_IMG_SIZE_HEIGHT / (float) mBitmap.getHeight();
+        // todo: cut empty space around sketch
+        return Bitmap.createScaledBitmap(mBitmap, (int)(mBitmap.getWidth()*scaleFactor), (int)(mBitmap.getHeight()*scaleFactor), true);
+
+    }
+
+}
\ No newline at end of file

ShapesClassification/ShapesClassification/app/src/main/java/scit/shapesclassification/PenPath.java

+package scit.shapesclassification;
+
+import android.graphics.Path;
+
+public class PenPath {
+
+    public int color;
+    public int strokeWidth;
+    public Path path;
+
+    public PenPath(int color, int strokeWidth, Path path) {
+        this.color = color;
+        this.strokeWidth = strokeWidth;
+        this.path = path;
+    }
+}
\ No newline at end of file

ShapesClassification/ShapesClassification/app/src/main/java/scit/shapesclassification/classification/ImageClassifier.java

+package scit.shapesclassification.classification;
+
+import android.app.Activity;
+import android.graphics.Bitmap;
+import android.util.Log;
+
+import org.tensorflow.lite.Interpreter;
+
+import java.io.IOException;
+import java.nio.ByteBuffer;
+import java.nio.ByteOrder;
+import java.nio.MappedByteBuffer;
+import java.util.ArrayList;
+
+
+
+public class ImageClassifier {
+
+    private static final String MODEL_FILE = "shape3/model.tflite";
+    private static final String LABELS_FILE = "shape3/labels.csv";
+
+    private static final int DIM_BATCH_SIZE = 1;
+    public static final int DIM_IMG_SIZE_HEIGHT = 28;
+    public static final int DIM_IMG_SIZE_WIDTH = 28;
+    private static final int DIM_PIXEL_SIZE = 1;
+
+    private ArrayList<String> labels; // list of all labels
+    private ByteBuffer imgData = null; // models input format
+    private Interpreter tflite; // the model
+    private int[] imagePixels = new int[DIM_IMG_SIZE_HEIGHT * DIM_IMG_SIZE_WIDTH];
+    private final float[][] result; // depending on models architecture (possible multiple output)
+
+    private int expectedIndex; // random label index which is to be drawn
+
+    public ImageClassifier(Activity activity) throws IOException {
+
+        // load model
+        MappedByteBuffer modelBuffered = ModelInput.loadModelFile(activity, MODEL_FILE);
+        Log.i("ImageClassifier", "" + modelBuffered.isLoaded());
+        this.tflite = new Interpreter(modelBuffered);
+
+        // load labels
+        this.labels = ModelInput.readLabels(activity, LABELS_FILE);
+        this.result = new float[1][labels.size()];
+
+        // allocate memory for model input
+        this.imgData = ByteBuffer.allocateDirect(4 * DIM_BATCH_SIZE * DIM_IMG_SIZE_HEIGHT * DIM_IMG_SIZE_WIDTH * DIM_PIXEL_SIZE);
+        this.imgData.order(ByteOrder.nativeOrder());
+
+        Log.i("ImageClassifier", "Successfully created a Tensorflow Lite sketch classifier.");
+    }
+
+    public Result classify(Bitmap bitmap) {
+        convertBitmapToByteBuffer(bitmap); // flatten bitmap to byte array
+        tflite.run(imgData, result); // classify task
+        return new Result(result[0], labels); // create the result
+    }
+
+    private void convertBitmapToByteBuffer(Bitmap bitmap) {
+        if (imgData == null) {
+            return;
+        }
+        imgData.rewind();
+
+        bitmap.getPixels(imagePixels, 0, bitmap.getWidth(), 0, 0, bitmap.getWidth(), bitmap.getHeight());
+
+        int pixel = 0;
+        for (int i = 0; i < DIM_IMG_SIZE_WIDTH; ++i) {
+            for (int j = 0; j < DIM_IMG_SIZE_HEIGHT; ++j) {
+                final int color = imagePixels[pixel++];
+                imgData.putFloat((((color >> 16) & 0xFF) + ((color >> 8) & 0xFF) + (color & 0xFF)) / 3.0f / 255.0f);
+            }
+        }
+    }
+
+
+    public void setExpectedIndex(int index) {
+        this.expectedIndex = index;
+    }
+
+
+    public int getExpectedIndex() {
+        return expectedIndex;
+    }
+
+    public float getProbability(int index) {
+        return result[0][index];
+    }
+
+    public String getLabel(int index) {
+        return labels.get(index);
+    }
+
+    public int getNumberOfClasses() {
+        return labels.size();
+    }
+}

ShapesClassification/ShapesClassification/app/src/main/java/scit/shapesclassification/classification/ModelInput.java

+package scit.shapesclassification.classification;
+
+import android.app.Activity;
+import android.content.res.AssetFileDescriptor;
+import android.content.res.AssetManager;
+
+import java.io.BufferedReader;
+import java.io.FileInputStream;
+import java.io.IOException;
+import java.io.InputStream;
+import java.io.InputStreamReader;
+import java.nio.MappedByteBuffer;
+import java.nio.channels.FileChannel;
+import java.util.ArrayList;
+
+
+/**
+ to read TensorFlow model and labels from file
+ */
+abstract class ModelInput {
+
+    /*
+     Reads the compressed model as MappedByteBuffer from file.
+
+     */
+    public static MappedByteBuffer loadModelFile(Activity activity, String modelFile) throws IOException {
+        AssetManager assetManager = activity.getAssets();
+        AssetFileDescriptor fileDescriptor = assetManager.openFd(modelFile);
+        FileInputStream inputStream = new FileInputStream(fileDescriptor.getFileDescriptor());
+        FileChannel fileChannel = inputStream.getChannel();
+        long startOffset = fileDescriptor.getStartOffset();
+        long declaredLength = fileDescriptor.getDeclaredLength();
+        return fileChannel.map(FileChannel.MapMode.READ_ONLY, startOffset, declaredLength);
+    }
+
+    /*
+      Read labels from file to an array list of labels.
+      This list represents the mapping from index position to label.
+     */
+    public static ArrayList readLabels(Activity activity, String labelsFile) {
+        AssetManager assetManager = activity.getAssets();
+        ArrayList<String> result = new ArrayList<>();
+        try {
+            InputStream is = assetManager.open(labelsFile);
+            BufferedReader br = new BufferedReader(new InputStreamReader(is));
+            String line;
+            while ((line = br.readLine()) != null) {
+                String[] splitted  = line.split(",");
+                result.add(splitted[1]);
+            }
+
+            return result;
+        } catch (IOException ex) {
+            throw new IllegalStateException("Cannot read labels from " + labelsFile + " " + ex);
+        }
+    }
+}

ShapesClassification/ShapesClassification/app/src/main/java/scit/shapesclassification/classification/Result.java

+package scit.shapesclassification.classification;
+
+import android.util.Log;
+
+import java.util.ArrayList;
+import java.util.LinkedList;
+import java.util.List;
+
+/**
+  Readable representation of the models output vector.
+  Contains label, label position in result vector and probability.
+ */
+public class Result {
+    private String label;
+    private int labelPosition;
+    private float probability;
+    private List<Integer> topK; // contains the index
+
+    public Result(float[] result, ArrayList<String> labels) {
+        this.labelPosition = argmax(result); // set index position
+        this.probability = result[labelPosition]; // set probability
+        this.label = labels.get(labelPosition); // search for label
+        this.topK = getTopkLabels(1, result);
+
+    }
+
+    // find the index with the maximum probability
+    private int argmax(float[] result) {
+        float maxProb = 0.0f;
+        int maxIndex = -1;
+        for (int i = 0; i < result.length; i++) {
+            if (result[i] > maxProb) {
+                maxProb = result[i];
+                maxIndex = i;
+            }
+        }
+        if (maxIndex == -1) {
+            Log.e("Result class", "argmax found no maximum");
+        }
+        return maxIndex;
+    }
+
+
+    // returns the top k labels with probability
+    private List<Integer> getTopkLabels(int k, float[] result) {
+        List<Integer> topK = new LinkedList<>();
+        for (int kk = 0; kk < k; kk++) {
+            float maxProb = 0.0f;
+            int maxIndex = -1;
+            for (int i = 0; i < result.length; i++) {
+                if (!topK.contains(i)) {
+                    if (result[i] > maxProb) {
+                        maxProb = result[i];
+                        maxIndex = i;
+                    }
+                }
+            }
+            topK.add(maxIndex);
+        }
+
+        return topK;
+    }
+
+    public String getLabel() { return this.label; }
+
+    public float getProbbability() {
+        return this.probability;
+    }
+
+    public List<Integer> getTopK() {
+        return this.topK;
+    }
+
+    public int getLabelPosition() {
+        return this.labelPosition;
+    }
+}

ShapesClassification/ShapesClassification/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:viewportHeight="108"
+    android:viewportWidth="108">
+    <path
+        android:fillType="evenOdd"
+        android:pathData="M32,64C32,64 38.39,52.99 44.13,50.95C51.37,48.37 70.14,49.57 70.14,49.57L108.26,87.69L108,109.01L75.97,107.97L32,64Z"
+        android:strokeColor="#00000000"
+        android:strokeWidth="1">
+        <aapt:attr name="android:fillColor">
+            <gradient
+                android:endX="78.5885"
+                android:endY="90.9159"
+                android:startX="48.7653"
+                android:startY="61.0927"
+                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="M66.94,46.02L66.94,46.02C72.44,50.07 76,56.61 76,64L32,64C32,56.61 35.56,50.11 40.98,46.06L36.18,41.19C35.45,40.45 35.45,39.3 36.18,38.56C36.91,37.81 38.05,37.81 38.78,38.56L44.25,44.05C47.18,42.57 50.48,41.71 54,41.71C57.48,41.71 60.78,42.57 63.68,44.05L69.11,38.56C69.84,37.81 70.98,37.81 71.71,38.56C72.44,39.3 72.44,40.45 71.71,41.19L66.94,46.02ZM62.94,56.92C64.08,56.92 65,56.01 65,54.88C65,53.76 64.08,52.85 62.94,52.85C61.8,52.85 60.88,53.76 60.88,54.88C60.88,56.01 61.8,56.92 62.94,56.92ZM45.06,56.92C46.2,56.92 47.13,56.01 47.13,54.88C47.13,53.76 46.2,52.85 45.06,52.85C43.92,52.85 43,53.76 43,54.88C43,56.01 43.92,56.92 45.06,56.92Z"
+        android:strokeColor="#00000000"
+        android:strokeWidth="1" />
+</vector>

ShapesClassification/ShapesClassification/app/src/main/res/drawable/ic_dashboard_black_24dp.xml

+<vector xmlns:android="http://schemas.android.com/apk/res/android"
+    android:width="24dp"
+    android:height="24dp"
+    android:viewportHeight="24.0"
+    android:viewportWidth="24.0">
+    <path
+        android:fillColor="#FF000000"
+        android:pathData="M3,13h8L11,3L3,3v10zM3,21h8v-6L3,15v6zM13,21h8L21,11h-8v10zM13,3v6h8L21,3h-8z" />
+</vector>

ShapesClassification/ShapesClassification/app/src/main/res/drawable/ic_home_black_24dp.xml

+<vector xmlns:android="http://schemas.android.com/apk/res/android"
+    android:width="24dp"
+    android:height="24dp"
+    android:viewportHeight="24.0"
+    android:viewportWidth="24.0">
+    <path
+        android:fillColor="#FF000000"
+        android:pathData="M10,20v-6h4v6h5v-8h3L12,3 2,12h3v8z" />
+</vector>

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

+<?xml version="1.0" encoding="utf-8"?>
+<vector xmlns:android="http://schemas.android.com/apk/res/android"
+    android:width="108dp"
+    android:height="108dp"
+    android:viewportHeight="108"
+    android:viewportWidth="108">
+    <path
+        android:fillColor="#26A69A"
+        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>

ShapesClassification/ShapesClassification/app/src/main/res/drawable/ic_notifications_black_24dp.xml

+<vector xmlns:android="http://schemas.android.com/apk/res/android"
+    android:width="24dp"
+    android:height="24dp"
+    android:viewportHeight="24.0"
+    android:viewportWidth="24.0">
+    <path
+        android:fillColor="#FF000000"
+        android:pathData="M12,22c1.1,0 2,-0.9 2,-2h-4c0,1.1 0.89,2 2,2zM18,16v-5c0,-3.07 -1.64,-5.64 -4.5,-6.32L13.5,4c0,-0.83 -0.67,-1.5 -1.5,-1.5s-1.5,0.67 -1.5,1.5v0.68C7.63,5.36 6,7.92 6,11v5l-2,2v1h16v-1l-2,-2z" />
+</vector>

ShapesClassification/ShapesClassification/app/src/main/res/layout/activity_dashboard.xml

+<?xml version="1.0" encoding="utf-8"?>
+<RelativeLayout 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:id="@+id/RelativeLayout1"
+    android:layout_width="match_parent"
+    android:layout_height="match_parent"
+    tools:context=".MainActivity">
+
+    <androidx.constraintlayout.widget.ConstraintLayout
+        android:layout_width="match_parent"
+        android:layout_height="match_parent"
+        android:background="#1B9CFC">
+
+        <ImageButton
+            android:id="@+id/Btn1"
+            android:layout_width="123dp"
+            android:layout_height="113dp"
+            android:background="#ffffff"
+            app:layout_constraintBottom_toBottomOf="parent"
+            app:layout_constraintEnd_toEndOf="parent"
+            app:layout_constraintHorizontal_bias="0.489"
+            app:layout_constraintStart_toStartOf="parent"
+            app:layout_constraintTop_toTopOf="parent"
+            app:layout_constraintVertical_bias="0.228"
+            app:srcCompat="@drawable/s2" />
+
+        <ImageButton
+            android:id="@+id/btn2"
+            android:layout_width="118dp"
+            android:layout_height="114dp"
+            android:background="#ffffff"
+            app:layout_constraintBottom_toBottomOf="parent"
+            app:layout_constraintEnd_toEndOf="parent"
+            app:layout_constraintHorizontal_bias="0.498"
+            app:layout_constraintStart_toStartOf="parent"
+            app:layout_constraintTop_toTopOf="parent"
+            app:layout_constraintVertical_bias="0.664"
+            app:srcCompat="@drawable/s1" />
+
+        <TextView
+            android:id="@+id/t1"
+            android:layout_width="307dp"
+            android:layout_height="62dp"
+            android:fontFamily="casual"
+            android:text="Shapes Matching"
+            android:textAlignment="center"
+            android:textColor="#ffffff"
+            android:textSize="30dp"
+            app:layout_constraintBottom_toBottomOf="parent"
+            app:layout_constraintEnd_toEndOf="parent"
+            app:layout_constraintStart_toStartOf="parent"
+            app:layout_constraintTop_toTopOf="parent"
+            app:layout_constraintVertical_bias="0.869" />
+
+        <TextView
+            android:id="@+id/t2"
+            android:layout_width="319dp"
+            android:layout_height="44dp"
+            android:fontFamily="casual"
+            android:text="Shapes Identification"
+            android:textAlignment="center"
+            android:textColor="#ffffff"
+            android:textSize="30dp"
+            app:layout_constraintBottom_toBottomOf="parent"
+            app:layout_constraintEnd_toEndOf="parent"
+            app:layout_constraintHorizontal_bias="0.434"
+            app:layout_constraintStart_toStartOf="parent"
+            app:layout_constraintTop_toTopOf="parent"
+            app:layout_constraintVertical_bias="0.433" />
+
+
+    </androidx.constraintlayout.widget.ConstraintLayout>
+
+</RelativeLayout>
\ No newline at end of file

ShapesClassification/ShapesClassification/app/src/main/res/layout/activity_main.xml

+<?xml version="1.0" encoding="utf-8"?>
+<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
+    xmlns:tools="http://schemas.android.com/tools"
+    android:id="@+id/activity_main"
+    android:layout_width="match_parent"
+    android:layout_height="match_parent"
+    tools:context="scit.shapesclassification.MainActivity">
+
+    <scit.shapesclassification.PaintView
+        android:id="@+id/paintView"
+        android:layout_width="380dp"
+        android:layout_height="380dp"
+        android:layout_alignParentTop="true"
+        android:layout_centerHorizontal="true"
+        android:layout_marginTop="49dp" />
+
+    <Button
+        android:id="@+id/btn_detect"
+        android:layout_width="match_parent"
+        android:layout_height="wrap_content"
+        android:layout_above="@+id/btn_next"
+        android:layout_alignParentStart="true"
+        android:onClick="onDetectClick"
+        android:text="හඳුනා ගන්න" />
+
+    <Button
+        android:id="@+id/btn_next"
+        android:layout_width="130dp"
+        android:layout_height="wrap_content"
+        android:layout_alignParentBottom="true"
+        android:layout_alignParentEnd="true"
+        android:onClick="onNextClick"
+        android:text="ඊලඟ හැඩය" />
+
+    <Button
+        android:id="@+id/btn_clear3"
+        android:layout_width="130dp"
+        android:layout_height="wrap_content"
+        android:layout_alignParentBottom="true"
+        android:layout_alignParentStart="true"
+        android:onClick="onClearClick"
+        android:text="ඉවත් කරන්න" />
+
+    <TextView
+        android:id="@+id/txt_draw_label"
+        android:layout_width="match_parent"
+        android:layout_height="wrap_content"
+        android:layout_alignParentStart="true"
+        android:layout_alignParentTop="true"
+        android:layout_marginTop="13dp"
+        android:text="අදින්න"
+        android:textAlignment="center"
+        android:textColor="@android:color/background_dark"
+        android:textSize="18sp" />
+
+    <TextView
+        android:id="@+id/txt_result_label"
+        android:layout_width="wrap_content"
+        android:layout_height="wrap_content"
+        android:layout_alignParentBottom="true"
+        android:layout_centerHorizontal="true"
+        android:layout_marginBottom="105dp"
+        android:text="TextView" />
+</RelativeLayout>
\ No newline at end of file

ShapesClassification/ShapesClassification/app/src/main/res/layout/activity_match_shapes.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=".MatchShapes">
+
+    <RelativeLayout
+        android:id="@+id/RelativeLayout2"
+        android:layout_width="402dp"
+        android:layout_height="530dp"
+        app:layout_constraintEnd_toEndOf="parent"
+        app:layout_constraintStart_toStartOf="parent"
+        app:layout_constraintTop_toTopOf="parent">
+
+
+        <TableLayout
+            android:id="@+id/tableLayout1"
+            android:layout_width="match_parent"
+            android:layout_height="match_parent">
+
+            <TableRow
+                android:id="@+id/tableRow1"
+                android:layout_width="match_parent"
+                android:layout_height="wrap_content"
+                android:layout_marginBottom="20dp">
+
+                <ImageView
+                    android:id="@+id/idACol1"
+                    android:layout_width="80dp"
+                    android:layout_height="80dp"
+                    android:scaleType="fitXY"
+                    android:src="@drawable/cir"
+                    android:tag="Circle" />
+
+                <TextView
+                    android:id="@+id/textView1"
+                    android:layout_width="160dp"
+                    android:layout_height="80dp"
+                    android:text="" />
+
+                <ImageView
+                    android:id="@+id/idACol2"
+                    android:layout_width="80dp"
+                    android:layout_height="80dp"
+                    android:scaleType="fitXY"
+                    android:src="@drawable/tri"
+                    android:tag="Triangle" />
+
+            </TableRow>
+
+            <TableRow
+                android:id="@+id/tableRow2"
+                android:layout_width="fill_parent"
+                android:layout_height="fill_parent"
+                android:layout_marginBottom="20dp">
+
+                <ImageView
+                    android:id="@+id/idBCol1"
+                    android:layout_width="80dp"
+                    android:layout_height="80dp"
+                    android:scaleType="fitXY"
+                    android:src="@drawable/squ"
+                    android:tag="Square" />
+
+                <TextView
+                    android:id="@+id/textView2"
+                    android:layout_width="239dp"
+                    android:layout_height="80dp"
+                    android:text="" />
+
+                <ImageView
+                    android:id="@+id/idBCol2"
+                    android:layout_width="80dp"
+                    android:layout_height="80dp"
+                    android:scaleType="fitXY"
+                    android:src="@drawable/cir"
+                    android:tag="Circle" />
+
+            </TableRow>
+
+            <TableRow
+                android:id="@+id/tableRow3"
+                android:layout_width="match_parent"
+                android:layout_height="match_parent"
+                android:layout_marginBottom="20dp">
+
+                <ImageView
+                    android:id="@+id/idCCol1"
+                    android:layout_width="80dp"
+                    android:layout_height="80dp"
+                    android:scaleType="fitXY"
+                    android:src="@drawable/tri"
+                    android:tag="Triangle" />
+
+                <TextView
+                    android:id="@+id/textView3"
+                    android:layout_width="160dp"
+                    android:layout_height="80dp"
+                    android:text="" />
+
+                <ImageView
+                    android:id="@+id/idCCol3"
+                    android:layout_width="80dp"
+                    android:layout_height="80dp"
+                    android:scaleType="fitXY"
+                    android:src="@drawable/squ"
+                    android:tag="Square" />
+
+            </TableRow>
+
+
+            <TableRow
+                android:id="@+id/tableRow4"
+                android:layout_width="match_parent"
+                android:layout_height="match_parent"
+                android:layout_marginBottom="20dp">
+
+                <ImageView
+                    android:id="@+id/idDCol1"
+                    android:layout_width="80dp"
+                    android:layout_height="80dp"
+                    android:scaleType="fitXY"
+                    android:src="@drawable/eli"
+                    android:tag="Ellipse" />
+
+                <TextView
+                    android:id="@+id/textView4"
+                    android:layout_width="match_parent"
+                    android:layout_height="80dp"
+                    android:text="" />
+
+                <ImageView
+                    android:id="@+id/idDCol3"
+                    android:layout_width="80dp"
+                    android:layout_height="80dp"
+                    android:scaleType="fitXY"
+                    android:src="@drawable/rect"
+                    android:tag="Rectangle" />
+
+            </TableRow>
+
+            <TableRow
+                android:id="@+id/tableRow5"
+                android:layout_width="match_parent"
+                android:layout_height="match_parent"
+                android:layout_marginBottom="20dp">
+
+                <ImageView
+                    android:id="@+id/idECol1"
+                    android:layout_width="80dp"
+                    android:layout_height="80dp"
+                    android:scaleType="fitXY"
+                    android:src="@drawable/rect"
+                    android:tag="Rectangle" />
+
+                <TextView
+                    android:id="@+id/textView5"
+                    android:layout_width="match_parent"
+                    android:layout_height="80dp"
+                    android:text="" />
+
+                <ImageView
+                    android:id="@+id/idECol2"
+                    android:layout_width="80dp"
+                    android:layout_height="80dp"
+                    android:scaleType="fitXY"
+                    android:src="@drawable/eli"
+                    android:tag="Ellipse" />
+
+            </TableRow>
+
+        </TableLayout>
+
+    </RelativeLayout>
+
+    <Button
+        android:id="@+id/btnRedo"
+        android:layout_width="wrap_content"
+        android:layout_height="wrap_content"
+        android:layout_marginTop="4dp"
+        android:text="උත්සාහ කරන්න"
+        app:layout_constraintEnd_toEndOf="parent"
+        app:layout_constraintStart_toStartOf="parent"
+        app:layout_constraintTop_toBottomOf="@id/RelativeLayout2"
+        tools:ignore="MissingConstraints" />
+
+</androidx.constraintlayout.widget.ConstraintLayout>

ShapesClassification/ShapesClassification/app/src/main/res/layout/custom_toast1.xml

+<?xml version="1.0" encoding="utf-8"?>
+<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
+    android:orientation="vertical" android:layout_width="match_parent"
+    android:layout_height="match_parent"
+    android:id="@+id/toast_root">
+
+    <TextView
+        android:layout_width="wrap_content"
+        android:layout_height="wrap_content"
+        android:layout_gravity="center"
+        android:background="#a55eea"
+        android:padding="15dp"
+        android:text="පිළිතුර නිවැරදිය !!!"
+        android:textColor="#f5f6fa"
+        android:textSize="20sp" />
+
+
+</LinearLayout>
\ No newline at end of file

ShapesClassification/ShapesClassification/app/src/main/res/layout/custom_toast2.xml

+<?xml version="1.0" encoding="utf-8"?>
+<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
+    android:orientation="vertical" android:layout_width="match_parent"
+    android:layout_height="match_parent"
+    android:id="@+id/toast_root2">
+
+    <TextView
+        android:layout_width="wrap_content"
+        android:layout_height="wrap_content"
+        android:layout_gravity="center"
+        android:background="#a55eea"
+        android:padding="15dp"
+        android:text="පිළිතුර වැරදිය !!!"
+        android:textColor="#f5f6fa"
+        android:textSize="20sp" />
+
+</LinearLayout>
\ No newline at end of file

ShapesClassification/ShapesClassification/app/src/main/res/menu/navigation.xml

+<?xml version="1.0" encoding="utf-8"?>
+<menu xmlns:android="http://schemas.android.com/apk/res/android">
+
+    <item
+        android:id="@+id/navigation_home"
+        android:icon="@drawable/ic_home_black_24dp"
+        android:title="@string/title_home" />
+
+    <item
+        android:id="@+id/navigation_dashboard"
+        android:icon="@drawable/ic_dashboard_black_24dp"
+        android:title="@string/title_dashboard" />
+
+    <item
+        android:id="@+id/navigation_notifications"
+        android:icon="@drawable/ic_notifications_black_24dp"
+        android:title="@string/title_notifications" />
+
+</menu>

ShapesClassification/ShapesClassification/app/src/main/res/mipmap-anydpi-v26/ic_launcher.xml

+<?xml version="1.0" encoding="utf-8"?>
+<adaptive-icon xmlns:android="http://schemas.android.com/apk/res/android">
+    <background android:drawable="@drawable/ic_launcher_background" />
+    <foreground android:drawable="@drawable/ic_launcher_foreground" />
+</adaptive-icon>
\ No newline at end of file

ShapesClassification/ShapesClassification/app/src/main/res/mipmap-anydpi-v26/ic_launcher_round.xml

+<?xml version="1.0" encoding="utf-8"?>
+<adaptive-icon xmlns:android="http://schemas.android.com/apk/res/android">
+    <background android:drawable="@drawable/ic_launcher_background" />
+    <foreground android:drawable="@drawable/ic_launcher_foreground" />
+</adaptive-icon>
\ No newline at end of file

ShapesClassification/ShapesClassification/app/src/main/res/values/colors.xml

+<?xml version="1.0" encoding="utf-8"?>
+<resources>
+    <color name="colorPrimary">#3F51B5</color>
+    <color name="colorPrimaryDark">#303F9F</color>
+    <color name="colorAccent">#FF4081</color>
+    <color name="lightgray">#ededed</color>
+</resources>

ShapesClassification/ShapesClassification/app/src/main/res/values/dimens.xml

+<resources>
+    <!-- Default screen margins, per the Android Design guidelines. -->
+    <dimen name="activity_horizontal_margin">16dp</dimen>
+    <dimen name="activity_vertical_margin">16dp</dimen>
+</resources>

ShapesClassification/ShapesClassification/app/src/main/res/values/ids.xml

+<?xml version="1.0" encoding="utf-8"?>
+<resources>
+
+</resources>
\ No newline at end of file

ShapesClassification/ShapesClassification/app/src/main/res/values/strings.xml

+<resources>
+    <string name="app_name">SCIT - Shapes</string>
+    <string name="title_home">Home</string>
+    <string name="title_dashboard">Dashboard</string>
+    <string name="title_notifications">Notifications</string>
+</resources>

ShapesClassification/ShapesClassification/app/src/main/res/values/styles.xml

+<resources>
+
+    <!-- Base application theme. -->
+    <style name="AppTheme" parent="Theme.AppCompat.Light.DarkActionBar">
+        <!-- Customize your theme here. -->
+        <item name="colorPrimary">@color/colorPrimary</item>
+        <item name="colorPrimaryDark">@color/colorPrimaryDark</item>
+        <item name="colorAccent">@color/colorAccent</item>
+    </style>
+
+</resources>

ShapesClassification/ShapesClassification/app/src/test/java/scit/shapesclassification/ExampleUnitTest.java

+package scit.shapesclassification;
+
+import org.junit.Test;
+
+import static org.junit.Assert.*;
+
+/**
+ * Example local unit test, which will execute on the development machine (host).
+ *
+ * @see <a href="http://d.android.com/tools/testing">Testing documentation</a>
+ */
+public class ExampleUnitTest {
+    @Test
+    public void addition_isCorrect() {
+        assertEquals(4, 2 + 2);
+    }
+}
\ No newline at end of file

ShapesClassification/ShapesClassification/build.gradle

+// Top-level build file where you can add configuration options common to all sub-projects/modules.
+
+
+
+
+buildscript {
+
+    repositories {
+        google()
+        jcenter()
+    }
+    dependencies {
+        classpath 'com.android.tools.build:gradle:3.2.0'
+        // NOTE: Do not place your application dependencies here; they belong
+        // in the individual module build.gradle files
+    }
+}
+
+
+
+allprojects {
+    repositories {
+        google()
+        jcenter()
+    }
+}
+
+
+
+task clean(type: Delete) {
+    delete rootProject.buildDir
+}

ShapesClassification/ShapesClassification/gradle.properties

+# Project-wide Gradle settings.
+# IDE (e.g. Android Studio) users:
+# Gradle settings configured through the IDE *will override*
+# any settings specified in this file.
+# For more details on how to configure your build environment visit
+# http://www.gradle.org/docs/current/userguide/build_environment.html
+# Specifies the JVM arguments used for the daemon process.
+# The setting is particularly useful for tweaking memory settings.
+android.enableJetifier=true
+android.useAndroidX=true
+org.gradle.jvmargs=-Xmx1536m
+# When configured, Gradle will run in incubating parallel mode.
+# This option should only be used with decoupled projects. More details, visit
+# http://www.gradle.org/docs/current/userguide/multi_project_builds.html#sec:decoupled_projects
+# org.gradle.parallel=true

ShapesClassification/ShapesClassification/gradle/wrapper/gradle-wrapper.properties

+#Mon May 28 16:24:27 CEST 2018
+distributionBase=GRADLE_USER_HOME
+distributionPath=wrapper/dists
+zipStoreBase=GRADLE_USER_HOME
+zipStorePath=wrapper/dists
+distributionUrl=https\://services.gradle.org/distributions/gradle-4.6-all.zip

ShapesClassification/ShapesClassification/gradlew

+#!/usr/bin/env sh
+
+##############################################################################
+##
+##  Gradle start up script for UN*X
+##
+##############################################################################
+
+# Attempt to set APP_HOME
+# Resolve links: $0 may be a link
+PRG="$0"
+# Need this for relative symlinks.
+while [ -h "$PRG" ] ; do
+    ls=`ls -ld "$PRG"`
+    link=`expr "$ls" : '.*-> \(.*\)$'`
+    if expr "$link" : '/.*' > /dev/null; then
+        PRG="$link"
+    else
+        PRG=`dirname "$PRG"`"/$link"
+    fi
+done
+SAVED="`pwd`"
+cd "`dirname \"$PRG\"`/" >/dev/null
+APP_HOME="`pwd -P`"
+cd "$SAVED" >/dev/null
+
+APP_NAME="Gradle"
+APP_BASE_NAME=`basename "$0"`
+
+# Add default JVM options here. You can also use JAVA_OPTS and GRADLE_OPTS to pass JVM options to this script.
+DEFAULT_JVM_OPTS=""
+
+# Use the maximum available, or set MAX_FD != -1 to use that value.
+MAX_FD="maximum"
+
+warn () {
+    echo "$*"
+}
+
+die () {
+    echo
+    echo "$*"
+    echo
+    exit 1
+}
+
+# OS specific support (must be 'true' or 'false').
+cygwin=false
+msys=false
+darwin=false
+nonstop=false
+case "`uname`" in
+  CYGWIN* )
+    cygwin=true
+    ;;
+  Darwin* )
+    darwin=true
+    ;;
+  MINGW* )
+    msys=true
+    ;;
+  NONSTOP* )
+    nonstop=true
+    ;;
+esac
+
+CLASSPATH=$APP_HOME/gradle/wrapper/gradle-wrapper.jar
+
+# Determine the Java command to use to start the JVM.
+if [ -n "$JAVA_HOME" ] ; then
+    if [ -x "$JAVA_HOME/jre/sh/java" ] ; then
+        # IBM's JDK on AIX uses strange locations for the executables
+        JAVACMD="$JAVA_HOME/jre/sh/java"
+    else
+        JAVACMD="$JAVA_HOME/bin/java"
+    fi
+    if [ ! -x "$JAVACMD" ] ; then
+        die "ERROR: JAVA_HOME is set to an invalid directory: $JAVA_HOME
+
+Please set the JAVA_HOME variable in your environment to match the
+location of your Java installation."
+    fi
+else
+    JAVACMD="java"
+    which java >/dev/null 2>&1 || die "ERROR: JAVA_HOME is not set and no 'java' command could be found in your PATH.
+
+Please set the JAVA_HOME variable in your environment to match the
+location of your Java installation."
+fi
+
+# Increase the maximum file descriptors if we can.
+if [ "$cygwin" = "false" -a "$darwin" = "false" -a "$nonstop" = "false" ] ; then
+    MAX_FD_LIMIT=`ulimit -H -n`
+    if [ $? -eq 0 ] ; then
+        if [ "$MAX_FD" = "maximum" -o "$MAX_FD" = "max" ] ; then
+            MAX_FD="$MAX_FD_LIMIT"
+        fi
+        ulimit -n $MAX_FD
+        if [ $? -ne 0 ] ; then
+            warn "Could not set maximum file descriptor limit: $MAX_FD"
+        fi
+    else
+        warn "Could not query maximum file descriptor limit: $MAX_FD_LIMIT"
+    fi
+fi
+
+# For Darwin, add options to specify how the application appears in the dock
+if $darwin; then
+    GRADLE_OPTS="$GRADLE_OPTS \"-Xdock:name=$APP_NAME\" \"-Xdock:icon=$APP_HOME/media/gradle.icns\""
+fi
+
+# For Cygwin, switch paths to Windows format before running java
+if $cygwin ; then
+    APP_HOME=`cygpath --path --mixed "$APP_HOME"`
+    CLASSPATH=`cygpath --path --mixed "$CLASSPATH"`
+    JAVACMD=`cygpath --unix "$JAVACMD"`
+
+    # We build the pattern for arguments to be converted via cygpath
+    ROOTDIRSRAW=`find -L / -maxdepth 1 -mindepth 1 -type d 2>/dev/null`
+    SEP=""
+    for dir in $ROOTDIRSRAW ; do
+        ROOTDIRS="$ROOTDIRS$SEP$dir"
+        SEP="|"
+    done
+    OURCYGPATTERN="(^($ROOTDIRS))"
+    # Add a user-defined pattern to the cygpath arguments
+    if [ "$GRADLE_CYGPATTERN" != "" ] ; then
+        OURCYGPATTERN="$OURCYGPATTERN|($GRADLE_CYGPATTERN)"
+    fi
+    # Now convert the arguments - kludge to limit ourselves to /bin/sh
+    i=0
+    for arg in "$@" ; do
+        CHECK=`echo "$arg"|egrep -c "$OURCYGPATTERN" -`
+        CHECK2=`echo "$arg"|egrep -c "^-"`                                 ### Determine if an option
+
+        if [ $CHECK -ne 0 ] && [ $CHECK2 -eq 0 ] ; then                    ### Added a condition
+            eval `echo args$i`=`cygpath --path --ignore --mixed "$arg"`
+        else
+            eval `echo args$i`="\"$arg\""
+        fi
+        i=$((i+1))
+    done
+    case $i in
+        (0) set -- ;;
+        (1) set -- "$args0" ;;
+        (2) set -- "$args0" "$args1" ;;
+        (3) set -- "$args0" "$args1" "$args2" ;;
+        (4) set -- "$args0" "$args1" "$args2" "$args3" ;;
+        (5) set -- "$args0" "$args1" "$args2" "$args3" "$args4" ;;
+        (6) set -- "$args0" "$args1" "$args2" "$args3" "$args4" "$args5" ;;
+        (7) set -- "$args0" "$args1" "$args2" "$args3" "$args4" "$args5" "$args6" ;;
+        (8) set -- "$args0" "$args1" "$args2" "$args3" "$args4" "$args5" "$args6" "$args7" ;;
+        (9) set -- "$args0" "$args1" "$args2" "$args3" "$args4" "$args5" "$args6" "$args7" "$args8" ;;
+    esac
+fi
+
+# Escape application args
+save () {
+    for i do printf %s\\n "$i" | sed "s/'/'\\\\''/g;1s/^/'/;\$s/\$/' \\\\/" ; done
+    echo " "
+}
+APP_ARGS=$(save "$@")
+
+# Collect all arguments for the java command, following the shell quoting and substitution rules
+eval set -- $DEFAULT_JVM_OPTS $JAVA_OPTS $GRADLE_OPTS "\"-Dorg.gradle.appname=$APP_BASE_NAME\"" -classpath "\"$CLASSPATH\"" org.gradle.wrapper.GradleWrapperMain "$APP_ARGS"
+
+# by default we should be in the correct project dir, but when run from Finder on Mac, the cwd is wrong
+if [ "$(uname)" = "Darwin" ] && [ "$HOME" = "$PWD" ]; then
+  cd "$(dirname "$0")"
+fi
+
+exec "$JAVACMD" "$@"

ShapesClassification/ShapesClassification/gradlew.bat

+@if "%DEBUG%" == "" @echo off
+@rem ##########################################################################
+@rem
+@rem  Gradle startup script for Windows
+@rem
+@rem ##########################################################################
+
+@rem Set local scope for the variables with windows NT shell
+if "%OS%"=="Windows_NT" setlocal
+
+set DIRNAME=%~dp0
+if "%DIRNAME%" == "" set DIRNAME=.
+set APP_BASE_NAME=%~n0
+set APP_HOME=%DIRNAME%
+
+@rem Add default JVM options here. You can also use JAVA_OPTS and GRADLE_OPTS to pass JVM options to this script.
+set DEFAULT_JVM_OPTS=
+
+@rem Find java.exe
+if defined JAVA_HOME goto findJavaFromJavaHome
+
+set JAVA_EXE=java.exe
+%JAVA_EXE% -version >NUL 2>&1
+if "%ERRORLEVEL%" == "0" goto init
+
+echo.
+echo ERROR: JAVA_HOME is not set and no 'java' command could be found in your PATH.
+echo.
+echo Please set the JAVA_HOME variable in your environment to match the
+echo location of your Java installation.
+
+goto fail
+
+:findJavaFromJavaHome
+set JAVA_HOME=%JAVA_HOME:"=%
+set JAVA_EXE=%JAVA_HOME%/bin/java.exe
+
+if exist "%JAVA_EXE%" goto init
+
+echo.
+echo ERROR: JAVA_HOME is set to an invalid directory: %JAVA_HOME%
+echo.
+echo Please set the JAVA_HOME variable in your environment to match the
+echo location of your Java installation.
+
+goto fail
+
+:init
+@rem Get command-line arguments, handling Windows variants
+
+if not "%OS%" == "Windows_NT" goto win9xME_args
+
+:win9xME_args
+@rem Slurp the command line arguments.
+set CMD_LINE_ARGS=
+set _SKIP=2
+
+:win9xME_args_slurp
+if "x%~1" == "x" goto execute
+
+set CMD_LINE_ARGS=%*
+
+:execute
+@rem Setup the command line
+
+set CLASSPATH=%APP_HOME%\gradle\wrapper\gradle-wrapper.jar
+
+@rem Execute Gradle
+"%JAVA_EXE%" %DEFAULT_JVM_OPTS% %JAVA_OPTS% %GRADLE_OPTS% "-Dorg.gradle.appname=%APP_BASE_NAME%" -classpath "%CLASSPATH%" org.gradle.wrapper.GradleWrapperMain %CMD_LINE_ARGS%
+
+:end
+@rem End local scope for the variables with windows NT shell
+if "%ERRORLEVEL%"=="0" goto mainEnd
+
+:fail
+rem Set variable GRADLE_EXIT_CONSOLE if you need the _script_ return code instead of
+rem the _cmd.exe /c_ return code!
+if  not "" == "%GRADLE_EXIT_CONSOLE%" exit 1
+exit /b 1
+
+:mainEnd
+if "%OS%"=="Windows_NT" endlocal
+
+:omega

ShapesClassification/ShapesClassification/settings.gradle

+include ':app'