From bfa9027dc49d7758722bf5a7c819dadb3a5fc13d Mon Sep 17 00:00:00 2001
From: Chaphasilor <ppp.u@web.de>
Date: Wed, 11 Dec 2024 20:56:42 +0100
Subject: [PATCH] add output switcher button to player screen on Android

---
 android/app/build.gradle                      |  1 +
 android/app/src/main/AndroidManifest.xml      |  7 ++-
 .../com/unicornsonlsd/finamp/MainActivity.kt  | 52 ++++++++++++++++++-
 lib/main.dart                                 |  5 +-
 lib/screens/player_screen.dart                | 13 +++++
 .../music_player_background_task.dart         | 46 ++++++++++++++++
 6 files changed, 120 insertions(+), 4 deletions(-)

diff --git a/android/app/build.gradle b/android/app/build.gradle
index 99bf0a8e6..960c5e4bb 100644
--- a/android/app/build.gradle
+++ b/android/app/build.gradle
@@ -72,4 +72,5 @@ flutter {
 
 dependencies {
     implementation 'androidx.appcompat:appcompat:1.3.1'
+    implementation 'androidx.mediarouter:mediarouter:1.7.0'
 }
diff --git a/android/app/src/main/AndroidManifest.xml b/android/app/src/main/AndroidManifest.xml
index 523e12a14..73af1fbd3 100644
--- a/android/app/src/main/AndroidManifest.xml
+++ b/android/app/src/main/AndroidManifest.xml
@@ -22,7 +22,7 @@
     android:allowBackup="false"
     android:fullBackupContent="false"
   >
-    <activity android:name="com.ryanheise.audioservice.AudioServiceActivity" android:launchMode="singleTop" android:theme="@style/LaunchTheme" android:configChanges="orientation|keyboardHidden|keyboard|screenSize|smallestScreenSize|locale|layoutDirection|fontScale|screenLayout|density|uiMode" android:hardwareAccelerated="true" android:windowSoftInputMode="adjustResize" android:exported="true">
+    <activity android:name=".MainActivity" android:launchMode="singleTop" android:theme="@style/LaunchTheme" android:configChanges="orientation|keyboardHidden|keyboard|screenSize|smallestScreenSize|locale|layoutDirection|fontScale|screenLayout|density|uiMode" android:hardwareAccelerated="true" android:windowSoftInputMode="adjustResize" android:exported="true">
       <!-- Specifies an Android theme to apply to this Activity as soon as
                  the Android process has started. This theme is visible to the user
                  while the Flutter UI initializes. After that, this theme continues
@@ -60,6 +60,11 @@
       </intent-filter>
     </receiver>
 
+    <receiver
+        android:name="androidx.mediarouter.media.MediaTransferReceiver"
+        android:exported="true">
+    </receiver>
+
     <meta-data
       android:name="com.google.android.gms.car.application"
       android:resource="@xml/automotive_app_desc" />
diff --git a/android/app/src/main/kotlin/com/unicornsonlsd/finamp/MainActivity.kt b/android/app/src/main/kotlin/com/unicornsonlsd/finamp/MainActivity.kt
index 4eafd82c0..b065f98c7 100644
--- a/android/app/src/main/kotlin/com/unicornsonlsd/finamp/MainActivity.kt
+++ b/android/app/src/main/kotlin/com/unicornsonlsd/finamp/MainActivity.kt
@@ -1,6 +1,54 @@
 package com.unicornsonlsd.finamp
 
+import androidx.annotation.NonNull
+import androidx.mediarouter.app.SystemOutputSwitcherDialogController
+import androidx.mediarouter.media.MediaRouter
+import com.ryanheise.audioservice.AudioServiceActivity
 import io.flutter.embedding.android.FlutterActivity
+import io.flutter.embedding.engine.FlutterEngine
+import io.flutter.plugin.common.MethodChannel
 
-class MainActivity: FlutterActivity() {
-}
\ No newline at end of file
+class MainActivity: AudioServiceActivity() {
+  private val CHANNEL = "com.unicornsonlsd.finamp/output_switcher"
+
+  override fun configureFlutterEngine(@NonNull flutterEngine: FlutterEngine) {
+    super.configureFlutterEngine(flutterEngine)
+    MethodChannel(flutterEngine.dartExecutor.binaryMessenger, CHANNEL).setMethodCallHandler { call, result ->
+      println("calling method: '${call.method}'")
+      if (call.method == "showOutputSwitcherDialog") {
+        showOutputSwitcherDialog()
+        result.success(null)
+      } else if (call.method == "getRoutes") {
+        val router = MediaRouter.getInstance(this)
+        val routes = router.routes
+        routes.forEach { route ->
+          println("Route: ${route.name}, connection state: ${route.connectionState}, system route: ${route.isSystemRoute}, default: ${route.isDefault}, device speaker: ${route.isDeviceSpeaker}, bluetooth: ${route.isBluetooth}, volume: ${route.volume}, provider: ${route.provider.packageName}")
+        }
+      } else if (call.method == "setOutputToDeviceSpeaker") {
+        val router = MediaRouter.getInstance(this)
+        val routes = router.getRoutes()
+        routes.forEach { route ->
+          println("Route: ${route.name}, connection state: ${route.connectionState}, system route: ${route.isSystemRoute}, default: ${route.isDefault}, device speaker: ${route.isDeviceSpeaker}, bluetooth: ${route.isBluetooth}, volume: ${route.volume}, provider: ${route.provider.packageName}")
+        }
+        val deviceSpeakerRoute = routes.first { route -> route.isDeviceSpeaker }
+        router.selectRoute(deviceSpeakerRoute)
+      } else if (call.method == "setOutputToBluetoothDevice") {
+        val router = MediaRouter.getInstance(this)
+        val routes = router.getRoutes()
+        routes.forEach { route ->
+          println("Route: ${route.name}, connection state: ${route.connectionState}, system route: ${route.isSystemRoute}, default: ${route.isDefault}, device speaker: ${route.isDeviceSpeaker}, bluetooth: ${route.isBluetooth}, volume: ${route.volume}, provider: ${route.provider.packageName}")
+        }
+        val bluetoothRoute = routes.first { route -> route.isBluetooth }
+        router.selectRoute(bluetoothRoute)
+      }
+      else {
+        println("Method not found: '${call.method}'")
+        result.notImplemented()
+      }
+    }
+  }
+
+  private fun showOutputSwitcherDialog() {
+    SystemOutputSwitcherDialogController.showDialog(this)
+  }
+}
diff --git a/lib/main.dart b/lib/main.dart
index db117ef8a..e64d853fc 100644
--- a/lib/main.dart
+++ b/lib/main.dart
@@ -1,5 +1,6 @@
 import 'dart:async';
 import 'dart:io';
+import 'dart:ui';
 
 import 'package:audio_service/audio_service.dart';
 import 'package:audio_session/audio_session.dart';
@@ -110,6 +111,8 @@ void main() async {
       flutterLogger.severe(error, error, details.stack);
     };
 
+    DartPluginRegistrant.ensureInitialized();
+
     await findSystemLocale();
     await initializeDateFormatting();
 
@@ -443,7 +446,7 @@ class _FinampState extends ConsumerState<Finamp> with WindowListener {
   }
 
   @override
-  Widget build(BuildContext context) {   
+  Widget build(BuildContext context) {
     return ProviderScope(
       child: GestureDetector(
         onTap: () {
diff --git a/lib/screens/player_screen.dart b/lib/screens/player_screen.dart
index a1e157003..84bae56ba 100644
--- a/lib/screens/player_screen.dart
+++ b/lib/screens/player_screen.dart
@@ -12,6 +12,7 @@ import 'package:finamp/screens/lyrics_screen.dart';
 import 'package:finamp/services/current_track_metadata_provider.dart';
 import 'package:finamp/services/feedback_helper.dart';
 import 'package:finamp/services/finamp_settings_helper.dart';
+import 'package:finamp/services/music_player_background_task.dart';
 import 'package:finamp/services/queue_service.dart';
 import 'package:finamp/services/theme_provider.dart';
 import 'package:flutter/material.dart';
@@ -250,6 +251,18 @@ class _PlayerScreenContent extends ConsumerWidget {
                   ),
                 ),
               ),
+            if (Platform.isAndroid)
+              IconButton(
+                icon: Icon(TablerIcons.cast),
+                onPressed: () {
+                  final audioHandler =
+                      GetIt.instance<MusicPlayerBackgroundTask>();
+                  audioHandler.getRoutes();
+                  // audioHandler.setOutputToDeviceSpeaker();
+                  // audioHandler.setOutputToBluetoothDevice();
+                  audioHandler.showOutputSwitcherDialog();
+                },
+              ),
           ],
         ),
         // Required for sleep timer input
diff --git a/lib/services/music_player_background_task.dart b/lib/services/music_player_background_task.dart
index 1a7547b39..e62eda773 100644
--- a/lib/services/music_player_background_task.dart
+++ b/lib/services/music_player_background_task.dart
@@ -9,6 +9,7 @@ import 'package:finamp/models/finamp_models.dart';
 import 'package:finamp/models/jellyfin_models.dart' as jellyfin_models;
 import 'package:finamp/services/favorite_provider.dart';
 import 'package:finamp/services/jellyfin_api_helper.dart';
+import 'package:flutter/services.dart';
 import 'package:flutter_riverpod/flutter_riverpod.dart';
 import 'package:get_it/get_it.dart';
 import 'package:flutter_gen/gen_l10n/app_localizations.dart';
@@ -60,6 +61,51 @@ class MusicPlayerBackgroundTask extends BaseAudioHandler {
   ValueListenable<Timer?> get sleepTimer => _sleepTimer;
 
   double iosBaseVolumeGainFactor = 1.0;
+  
+  final outputSwitcherChannel =
+      MethodChannel('com.unicornsonlsd.finamp/output_switcher');
+
+  Future<void> showOutputSwitcherDialog() async {
+    try {
+      print("Showing output switcher dialog");
+      await outputSwitcherChannel.invokeMethod('showOutputSwitcherDialog');
+      print("Output switcher dialog shown");
+    } on PlatformException catch (e) {
+      print("Failed to show output switcher dialog: ${e.message}");
+    } catch (e) {
+      print("Failed to show output switcher dialog: $e");
+    }
+  }
+
+  Future<void> getRoutes() async {
+    try {
+      await outputSwitcherChannel.invokeMethod('getRoutes');
+    } on PlatformException catch (e) {
+      print("Failed to get routes: ${e.message}");
+    } catch (e) {
+      print("Failed to get routes: $e");
+    }
+  }
+
+  Future<void> setOutputToDeviceSpeaker() async {
+    try {
+      await outputSwitcherChannel.invokeMethod('setOutputToDeviceSpeaker');
+    } on PlatformException catch (e) {
+      print("Failed to switch output: ${e.message}");
+    } catch (e) {
+      print("Failed to switch output: $e");
+    }
+  }
+
+  Future<void> setOutputToBluetoothDevice() async {
+    try {
+      await outputSwitcherChannel.invokeMethod('setOutputToBluetoothDevice');
+    } on PlatformException catch (e) {
+      print("Failed to switch output: ${e.message}");
+    } catch (e) {
+      print("Failed to switch output: $e");
+    }
+  }
 
   MusicPlayerBackgroundTask() {
     _audioServiceBackgroundTaskLogger.info("Starting audio service");