fixed bluetooth for android and refactored some files

flutter_provisioning_for_iot/android/app/build.gradle

@@ -58,6 +58,9 @@ android {
             // TODO: Add your own signing config for the release build.
             // Signing with the debug keys for now, so `flutter run --release` works.
             signingConfig signingConfigs.debug
+            // needed to fix bluetooth scan
+            shrinkResources false
+            minifyEnabled false
         }
     }
 }
@@ -67,5 +70,5 @@ flutter {
 }
 
 dependencies {
-    implementation "org.jetbrains.kotlin:kotlin-stdlib-jdk7:$kotlin_version"
+    implementation "org.jetbrains.kotlin:kotlin-stdlib-jdk8:$kotlin_version"
 }

flutter_provisioning_for_iot/android/app/src/main/AndroidManifest.xml

@@ -3,8 +3,11 @@
     package="com.example.flutter_provisioning_for_iot">
     <uses-permission android:name="android.permission.INTERNET"/>
     <uses-permission android:name="android.permission.BLUETOOTH" />
+    <uses-permission android:name="android.permission.BLUETOOTH_SCAN" />
     <uses-permission android:name="android.permission.BLUETOOTH_ADMIN" />
     <uses-permission android:name="android.permission.ACCESS_FINE_LOCATION"/>
+    <!-- Needed to communicate with already-paired Bluetooth devices. (Android 12 upwards)-->
+    <uses-permission android:name="android.permission.BLUETOOTH_CONNECT" />
    <application
         android:label="flutter_provisioning_for_iot"
         android:name="${applicationName}"

flutter_provisioning_for_iot/lib/BluetoothTest.dart

@@ -1,44 +0,0 @@
-import 'package:flutter_blue/flutter_blue.dart';
-import 'package:flutter/material.dart';
-import 'dart:async';
-import 'dart:math';
-
-import 'Sidebar.dart';
-
-class BluetoothTest extends StatefulWidget {
-  const BluetoothTest({super.key});
-
-  @override
-  State<BluetoothTest> createState() => _BluetoothTest();
-}
-
-class _BluetoothTest extends State<BluetoothTest> {
-  FlutterBlue flutterBlue = FlutterBlue.instance;
-  @override
-  Widget build(BuildContext context) {
-    return Scaffold(
-      appBar: AppBar(
-        title: const Text("Bluetooth Test"),
-      ),
-      body: Center(
-        child: TextButton(
-          onPressed: () {
-            var subscription = flutterBlue.scanResults.listen((results) {
-              // do something with scan results
-              for (ScanResult r in results) {
-                String scan = '"${r.device.name} found! rssi: ${r.rssi}"';
-                debugPrint(scan);
-              }
-            });
-            // Stop scanning
-            flutterBlue.stopScan();
-
-          }, child: const Text("Scan Devices"),
-        ),
-      ),
-      drawer: const Sidebar(),// This trailing comma makes auto-formatting nicer for build methods.
-    );
-  }
-}
-
-

flutter_provisioning_for_iot/lib/bluetooth_test.dart

@@ -0,0 +1,49 @@
+import 'package:flutter_blue/flutter_blue.dart';
+import 'package:flutter/material.dart';
+
+import 'sidebar.dart';
+
+class BluetoothTest extends StatefulWidget {
+  const BluetoothTest({super.key});
+
+  @override
+  State<BluetoothTest> createState() => _BluetoothTest();
+}
+
+class _BluetoothTest extends State<BluetoothTest> {
+  @override
+  Widget build(BuildContext context) {
+    return Scaffold(
+      appBar: AppBar(
+        title: const Text("Bluetooth Test"),
+      ),
+      body: Center(
+        child: TextButton(
+          onPressed: () async {
+
+              FlutterBlue flutterBlue = FlutterBlue.instance;
+              flutterBlue.startScan(timeout: const Duration(seconds: 4));
+
+              flutterBlue.scanResults.listen((results) async {
+                // do something with scan results
+                for (ScanResult r in results) {
+                  String scan = '"scan: ${r.device.name} found! rssi: ${r
+                      .rssi}"';
+                  debugPrint(scan);
+                  if(r.device.name == "Crusher ANC") {
+                    await r.device.connect();
+                  }
+                }
+              });
+              // Stop scanning
+              flutterBlue.stopScan();
+
+          }, child: const Text("Scan Devices"),
+        ),
+      ),
+      drawer: const Sidebar(),// This trailing comma makes auto-formatting nicer for build methods.
+    );
+  }
+}
+
+

flutter_provisioning_for_iot/lib/main.dart

@@ -1,6 +1,5 @@
 import 'package:flutter/material.dart';
-import 'package:flutter_blue/flutter_blue.dart';
-import 'package:flutter_provisioning_for_iot/MainPage.dart';
+import 'package:flutter_provisioning_for_iot/main_page.dart';
 
 void main() {
   runApp(const MainPage());

flutter_provisioning_for_iot/lib/main_page.dart

@@ -1,6 +1,5 @@
 import 'package:flutter/material.dart';
-import 'package:flutter_provisioning_for_iot/Sidebar.dart';
-import 'package:flutter_blue/flutter_blue.dart';
+import 'package:flutter_provisioning_for_iot/sidebar.dart';
 
 class MainPage extends StatelessWidget {
   const MainPage({super.key});
@@ -59,7 +58,7 @@ class _MyHomePageState extends State<MyHomePage> {
             ),
             Text(
               '$_counter',
-              style: Theme.of(context).textTheme.headline4,
+              style: Theme.of(context).textTheme.headlineMedium,
             ),
           ],
         ),

flutter_provisioning_for_iot/lib/settings.dart

@@ -2,7 +2,7 @@ import 'package:flutter/material.dart';
 import 'package:flutter/services.dart';
 import 'package:shared_preferences/shared_preferences.dart';
 
-import 'Sidebar.dart';
+import 'sidebar.dart';
 
 class Settings extends StatefulWidget {
   const Settings({Key? key}) : super(key: key);

flutter_provisioning_for_iot/lib/sidebar.dart

@@ -1,7 +1,7 @@
 import 'package:flutter/material.dart';
-import 'package:flutter_provisioning_for_iot/BluetoothTest.dart';
-import 'MainPage.dart';
-import 'Settings.dart';
+import 'package:flutter_provisioning_for_iot/bluetooth_test.dart';
+import 'main_page.dart';
+import 'settings.dart';
 
 class Sidebar extends StatelessWidget {
   const Sidebar({Key? key}) : super(key: key);