update dart DMT dart file

MainAppDMT/lib/main.dart

+import 'dart:io';
+import 'package:flutter/material.dart';
+import 'package:image_picker/image_picker.dart';
+import 'package:tflite/tflite.dart';
+
+void main() => runApp(MaterialApp(
+      home: MyApp(),
+    ));
+
+class MyApp extends StatefulWidget {
+  @override
+  _MyAppState createState() => _MyAppState();
+}
+
+class _MyAppState extends State<MyApp> {
+  List _outputs;
+  File _image;
+  bool _loading = false;
+
+  @override
+  void initState() {
+    super.initState();
+    _loading = true;
+
+    loadModel().then((value) {
+      setState(() {
+        _loading = false;
+      });
+    });
+  }
+
+  @override
+  Widget build(BuildContext context) {
+    return Scaffold(
+      appBar: AppBar(
+        title: const Text('Draw A Person Test'),
+      ),
+      body: _loading
+          ? Container(
+              alignment: Alignment.center,
+              child: CircularProgressIndicator(),
+            )
+          : Container(
+              width: MediaQuery.of(context).size.width,
+              child: Column(
+                crossAxisAlignment: CrossAxisAlignment.center,
+                mainAxisAlignment: MainAxisAlignment.center,
+                children: [
+                  _image == null ? Container() : Image.file(_image),
+                  SizedBox(
+                    height: 20,
+                  ),
+                  _outputs != null
+                      ? Text(
+                          "${_outputs[0]["label"]}",
+                          style: TextStyle(
+                            color: Colors.black,
+                            fontSize: 20.0,
+                            background: Paint()..color = Colors.white,
+                          ),
+                        )
+                      : Container()
+                ],
+              ),
+            ),
+      floatingActionButton: FloatingActionButton(
+        onPressed: pickImage,
+        child: Icon(Icons.image),
+      ),
+    );
+  }
+
+  pickImage() async {
+    var image = await ImagePicker.pickImage(source: ImageSource.gallery);
+    if (image == null) return null;
+    setState(() {
+      _loading = true;
+      _image = image;
+    });
+    classifyImage(image);
+  }
+
+  classifyImage(File image) async {
+    var output = await Tflite.runModelOnImage(
+      path: image.path,
+      numResults: 2,
+      threshold: 0.5,
+      imageMean: 127.5,
+      imageStd: 127.5,
+    );
+    setState(() {
+      _loading = false;
+      _outputs = output;
+    });
+  }
+
+  loadModel() async {
+    await Tflite.loadModel(
+      model: "assets/model_unquant.tflite",
+      labels: "assets/labels.txt",
+    );
+  }
+
+  @override
+  void dispose() {
+    Tflite.close();
+    super.dispose();
+  }
+}