refactor: improve android performances

packages/flutter_background_service/example/android/app/build.gradle

@@ -44,7 +44,7 @@ android {
     defaultConfig {
         // TODO: Specify your own unique Application ID (https://developer.android.com/studio/build/application-id.html).
         applicationId "id.flutter.example"
-        minSdkVersion flutter.minSdkVersion
+        minSdkVersion 19
         targetSdkVersion flutter.targetSdkVersion
         versionCode flutterVersionCode.toInteger()
         versionName flutterVersionName

packages/flutter_background_service/example/android/build.gradle

@@ -26,6 +26,6 @@ subprojects {
     project.evaluationDependsOn(':app')
 }
 
-task clean(type: Delete) {
+tasks.register("clean", Delete) {
     delete rootProject.buildDir
 }

packages/flutter_background_service/example/lib/main.dart

@@ -30,14 +30,16 @@ Future<void> initializeService() async {
   final FlutterLocalNotificationsPlugin flutterLocalNotificationsPlugin =
       FlutterLocalNotificationsPlugin();
 
-  if (Platform.isIOS) {
+  if (Platform.isIOS || Platform.isAndroid) {
     await flutterLocalNotificationsPlugin.initialize(
       const InitializationSettings(
-        iOS: IOSInitializationSettings(),
+        iOS: DarwinInitializationSettings(),
+        android: AndroidInitializationSettings('ic_bg_service_small'),
       ),
     );
   }
 
+
   await flutterLocalNotificationsPlugin
       .resolvePlatformSpecificImplementation<
           AndroidFlutterLocalNotificationsPlugin>()
@@ -139,10 +141,10 @@ void onStart(ServiceInstance service) async {
         );
 
         // if you don't using custom notification, uncomment this
-        // service.setForegroundNotificationInfo(
-        //   title: "My App Service",
-        //   content: "Updated at ${DateTime.now()}",
-        // );
+        service.setForegroundNotificationInfo(
+          title: "My App Service",
+          content: "Updated at ${DateTime.now()}",
+        );
       }
     }
 

packages/flutter_background_service/example/pubspec.yaml

@@ -42,12 +42,12 @@ dependencies:
   flutter_background_service_android: ^4.0.0
   # The following adds the Cupertino Icons font to your application.
   # Use with the CupertinoIcons class for iOS style icons.
-  cupertino_icons: ^1.0.2
-  device_info_plus: ^3.2.2
-  shared_preferences: ^2.0.15
+  cupertino_icons: ^1.0.5
+  device_info_plus: ^9.0.2
+  shared_preferences: ^2.1.2
 
   # optional if you wish to use a custom foreground service notification
-  flutter_local_notifications: ^9.9.1
+  flutter_local_notifications: ^14.1.1
 
 dev_dependencies:
   flutter_test:
@@ -58,7 +58,7 @@ dev_dependencies:
   # activated in the `analysis_options.yaml` file located at the root of your
   # package. See that file for information about deactivating specific lint
   # rules and activating additional ones.
-  flutter_lints: ^1.0.0
+  flutter_lints: ^2.0.1
 
 # For information on the generic Dart part of this file, see the
 # following page: https://dart.dev/tools/pub/pubspec

packages/flutter_background_service_android/android/src/main/java/id/flutter/flutter_background_service/BackgroundService.java

@@ -8,6 +8,7 @@
 import android.app.NotificationManager;
 import android.app.PendingIntent;
 import android.app.Service;
+import android.content.BroadcastReceiver;
 import android.content.Context;
 import android.content.Intent;
 import android.os.Build;
@@ -38,13 +39,13 @@
 import io.flutter.plugin.common.JSONMethodCodec;
 import io.flutter.plugin.common.MethodCall;
 import io.flutter.plugin.common.MethodChannel;
+import io.flutter.plugin.common.PluginRegistry;
 
 public class BackgroundService extends Service implements MethodChannel.MethodCallHandler {
     private static final String TAG = "BackgroundService";
     private static final String LOCK_NAME = BackgroundService.class.getName()
             + ".Lock";
     public static volatile WakeLock lockStatic = null; // notice static
-    final Map<Integer, IBackgroundService> listeners = new HashMap<>();
     AtomicBoolean isRunning = new AtomicBoolean(false);
     private FlutterEngine backgroundEngine;
     private MethodChannel methodChannel;
@@ -56,32 +57,6 @@ public class BackgroundService extends Service implements MethodChannel.MethodCa
     private String notificationChannelId;
     private int notificationId;
     private Handler mainHandler;
-    private final IBackgroundServiceBinder.Stub binder = new IBackgroundServiceBinder.Stub() {
-
-        @Override
-        public void bind(int id, IBackgroundService service) {
-            synchronized (listeners) {
-                listeners.put(id, service);
-            }
-        }
-
-        @Override
-        public void unbind(int id) {
-            synchronized (listeners) {
-                listeners.remove(id);
-            }
-        }
-
-        @Override
-        public void invoke(String data) {
-            try {
-                JSONObject call = new JSONObject(data);
-                receiveData(call);
-            } catch (Exception e) {
-                e.printStackTrace();
-            }
-        }
-    };
 
     synchronized public static PowerManager.WakeLock getLock(Context context) {
         if (lockStatic == null) {
@@ -97,25 +72,20 @@ synchronized public static PowerManager.WakeLock getLock(Context context) {
 
     @Override
     public IBinder onBind(Intent intent) {
-        return binder;
+        return null;
     }
 
     @Override
     public boolean onUnbind(Intent intent) {
-        final int binderId = intent.getIntExtra("binder_id", 0);
-        if (binderId != 0) {
-            synchronized (listeners) {
-                listeners.remove(binderId);
-            }
-        }
-
         return super.onUnbind(intent);
     }
 
     @Override
     public void onCreate() {
         super.onCreate();
 
+        FlutterBackgroundServicePlugin.servicePipe.addListener(listener);
+
         config = new Config(this);
         mainHandler = new Handler(Looper.getMainLooper());
 
@@ -151,9 +121,17 @@ public void onDestroy() {
 
         methodChannel = null;
         dartEntrypoint = null;
+        FlutterBackgroundServicePlugin.servicePipe.removeListener(listener);
         super.onDestroy();
     }
 
+    private final Pipe.PipeListener listener = new Pipe.PipeListener() {
+        @Override
+        public void onReceived(JSONObject object) {
+            receiveData(object);
+        }
+    };
+
     private void createNotificationChannel() {
         if (SDK_INT >= Build.VERSION_CODES.O) {
             CharSequence name = "Background Service";
@@ -223,6 +201,10 @@ private void runService() {
 
             isRunning.set(true);
             backgroundEngine = new FlutterEngine(this);
+
+            // remove FlutterBackgroundServicePlugin (because its only for UI)
+            backgroundEngine.getPlugins().remove(FlutterBackgroundServicePlugin.class);
+
             backgroundEngine.getServiceControlSurface().attachToService(BackgroundService.this, null, config.isForeground());
 
             methodChannel = new MethodChannel(backgroundEngine.getDartExecutor().getBinaryMessenger(), "id.flutter/background_service_android_bg", JSONMethodCodec.INSTANCE);
@@ -234,6 +216,7 @@ private void runService() {
             long backgroundHandle = config.getBackgroundHandle();
             args.add(String.valueOf(backgroundHandle));
 
+
             backgroundEngine.getDartExecutor().executeDartEntrypoint(dartEntrypoint, args);
 
         } catch (UnsatisfiedLinkError e) {
@@ -316,34 +299,15 @@ public void onMethodCall(@NonNull MethodCall call, @NonNull MethodChannel.Result
             if (method.equalsIgnoreCase("stopService")) {
                 isManuallyStopped = true;
                 WatchdogReceiver.remove(this);
-
-                try {
-                    synchronized (listeners) {
-                        for (Integer key : listeners.keySet()) {
-                            IBackgroundService listener = listeners.get(key);
-                            if (listener != null) {
-                                listener.stop();
-                            }
-                        }
-                    }
-                } catch (Exception e) {
-                    e.printStackTrace();
-                }
-
                 stopSelf();
                 result.success(true);
                 return;
             }
 
             if (method.equalsIgnoreCase("sendData")) {
                 try {
-                    synchronized (listeners) {
-                        for (Integer key : listeners.keySet()) {
-                            IBackgroundService listener = listeners.get(key);
-                            if (listener != null) {
-                                listener.invoke(call.arguments.toString());
-                            }
-                        }
+                    if (FlutterBackgroundServicePlugin.mainPipe.hasListener()){
+                        FlutterBackgroundServicePlugin.mainPipe.invoke((JSONObject) call.arguments);
                     }
 
                     result.success(true);