adds different vibration when cash recognitions is successfull or fai…

…lure

android/app/src/main/AndroidManifest.xml

@@ -9,6 +9,7 @@
     <uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE"/> -->
     <uses-permission android:name="android.permission.INTERNET" />
     <uses-permission android:name="android.permission.CAMERA"/>
+    <uses-permission android:name="android.permission.VIBRATE"/>
     <application
         android:name="io.flutter.app.FlutterApplication"
         android:label="Drishti Nepal"

lib/main.dart

@@ -1,9 +1,11 @@
+import 'package:drishti/src/utils/haptic_feedback.dart';
 import 'package:flutter/material.dart';
 import 'package:flutter/widgets.dart';
 import 'package:drishti/src/home/home_screen.dart';
 
 void main() {
   WidgetsFlutterBinding.ensureInitialized();
+  HapticFeedback.ensureInitialized();
   runApp(MyApp());
 }
 

lib/src/cash_recognition/classifier.dart

@@ -1,3 +1,5 @@
+import 'package:drishti/src/utils/haptic_feedback.dart';
+import 'package:flutter_vibrate/flutter_vibrate.dart';
 import 'package:tflite/tflite.dart';
 import 'dart:async';
 import 'package:drishti/src/utils/media_player.dart';
@@ -29,10 +31,16 @@ Future<void> classifyImage(String imagePath) async {
     Note noteObj = Note(label: note);
     await DatabaseHelper.instance.insert(noteObj);
     playAudio(note);
+    if(HapticFeedback.canVibrate){
+      Vibrate.feedback(FeedbackType.success);
+    }
   }
   // else play [wrong.mp3]
   else {
     await MediaPlayer.playAudio(audiofile + 'wrong.mp3');
+    if(HapticFeedback.canVibrate){
+      Vibrate.feedback(FeedbackType.error);
+    }
   }
 }
 

lib/src/utils/haptic_feedback.dart

@@ -0,0 +1,12 @@
+import 'package:flutter_vibrate/flutter_vibrate.dart';
+
+class HapticFeedback{
+  static bool canVibrate;
+
+  /// makes sure whether vibration is supported or not
+  /// this function runs only once preventing method call from being
+  /// called again and again.
+  static Future<void> ensureInitialized() async{
+      canVibrate = await Vibrate.canVibrate;
+  }
+}

pubspec.lock

@@ -151,6 +151,13 @@ packages:
     description: flutter
     source: sdk
     version: "0.0.0"
+  flutter_vibrate:
+    dependency: "direct main"
+    description:
+      name: flutter_vibrate
+      url: "https://pub.dartlang.org"
+    source: hosted
+    version: "1.1.0"
   flutter_web_plugins:
     dependency: transitive
     description: flutter
@@ -428,5 +435,5 @@ packages:
     source: hosted
     version: "2.2.1"
 sdks:
-  dart: ">=2.12.0-0.0 <3.0.0"
+  dart: ">=2.12.0-259.8.beta <3.0.0"
   flutter: ">=1.22.2"

pubspec.yaml

@@ -31,6 +31,7 @@ dependencies:
   # The following adds the Cupertino Icons font to your application.
   # Use with the CupertinoIcons class for iOS style icons.
   cupertino_icons: ^1.0.0
+  flutter_vibrate: ^1.1.0
 
 dev_dependencies:
   google_fonts: