move the background mode to a service

app/src/main/AndroidManifest.xml

@@ -283,6 +283,10 @@
             android:name=".services.UpdateService"
             android:enabled="true"
             android:exported="false" />
+
+        <service android:name=".services.BackgroundMode"
+            android:enabled="true"
+            android:exported="false" />
     </application>
 
 </manifest>

app/src/main/java/com/github/libretube/Globals.kt

@@ -1,5 +1,7 @@
 package com.github.libretube
 
+import android.content.Intent
+
 /**
  * Global variables can be stored here
  */
@@ -13,4 +15,7 @@ object Globals {
 
     // for downloads
     var IS_DOWNLOAD_RUNNING = false
+
+    // background mode intent
+    var backgroundModeIntent: Intent? = null
 }

app/src/main/java/com/github/libretube/dialogs/VideoOptionsDialog.kt

@@ -2,13 +2,15 @@ package com.github.libretube.dialogs
 
 import android.app.Dialog
 import android.content.Context
+import android.content.Intent
 import android.os.Bundle
 import android.widget.ArrayAdapter
 import android.widget.Toast
 import androidx.fragment.app.DialogFragment
+import com.github.libretube.Globals
 import com.github.libretube.R
 import com.github.libretube.preferences.PreferenceHelper
-import com.github.libretube.util.BackgroundMode
+import com.github.libretube.services.BackgroundMode
 import com.google.android.material.dialog.MaterialAlertDialogBuilder
 
 /**
@@ -43,13 +45,16 @@ class VideoOptionsDialog(private val videoId: String, context: Context) : Dialog
                     optionsList
                 )
             ) { _, which ->
-                // For now, this checks the position of the option with the position that is in the
-                // list. I don't like it, but we will do like this for now.
                 when (optionsList[which]) {
-                    // This for example will be the "Background mode" option
+                    // Start the background mode
                     context?.getString(R.string.playOnBackground) -> {
-                        BackgroundMode.getInstance()
+                        if (Globals.backgroundModeIntent != null) {
-                            .playOnBackgroundMode(requireContext(), videoId)
+                            activity?.stopService(Globals.backgroundModeIntent)
+                        }
+                        val intent = Intent(context, BackgroundMode::class.java)
+                        intent.putExtra("videoId", videoId)
+                        Globals.backgroundModeIntent = intent
+                        activity?.startService(intent)
                     }
                     // Add Video to Playlist Dialog
                     context?.getString(R.string.addToPlaylist) -> {

app/src/main/java/com/github/libretube/fragments/PlayerFragment.kt

@@ -58,7 +58,7 @@ import com.github.libretube.obj.Streams
 import com.github.libretube.obj.Subscribe
 import com.github.libretube.preferences.PreferenceHelper
 import com.github.libretube.preferences.PreferenceKeys
-import com.github.libretube.util.BackgroundMode
+import com.github.libretube.services.BackgroundMode
 import com.github.libretube.util.ConnectionHelper
 import com.github.libretube.util.CronetHelper
 import com.github.libretube.util.DescriptionAdapter
@@ -528,12 +528,13 @@ class PlayerFragment : Fragment() {
             exoPlayer.pause()
 
             // start the background mode
-            BackgroundMode
+            if (Globals.backgroundModeIntent != null) {
-                .getInstance()
+                activity?.stopService(Globals.backgroundModeIntent)
-                .playOnBackgroundMode(
+            }
-                    requireContext(),
+            val intent = Intent(context, BackgroundMode::class.java)
-                    videoId!!
+            intent.putExtra("videoId", videoId)
-                )
+            Globals.backgroundModeIntent = intent
+            activity?.startService(intent)
         }
 
         binding.playerScrollView.viewTreeObserver

app/src/main/java/com/github/libretube/services/BackgroundMode.kt

@@ -1,11 +1,16 @@
-package com.github.libretube.util
+package com.github.libretube.services
 
 import android.app.NotificationManager
+import android.app.Service
 import android.content.Context
+import android.content.Intent
+import android.os.IBinder
 import android.support.v4.media.session.MediaSessionCompat
 import com.github.libretube.obj.Streams
 import com.github.libretube.preferences.PreferenceHelper
 import com.github.libretube.preferences.PreferenceKeys
+import com.github.libretube.util.DescriptionAdapter
+import com.github.libretube.util.RetrofitInstance
 import com.google.android.exoplayer2.C
 import com.google.android.exoplayer2.ExoPlayer
 import com.google.android.exoplayer2.MediaItem
@@ -17,9 +22,9 @@ import kotlinx.coroutines.launch
 import kotlinx.coroutines.runBlocking
 
 /**
- * Loads the selected video audio in background mode with a notification area.
+ * Loads the selected videos audio in background mode with a notification area.
  */
-class BackgroundMode {
+class BackgroundMode : Service() {
     /**
      * The response that gets when called the Api.
      */
@@ -54,6 +59,43 @@ class BackgroundMode {
     /**
      * Initializes the [player] with the [MediaItem].
      */
+    override fun onStartCommand(intent: Intent?, flags: Int, startId: Int): Int {
+        val videoId = intent?.getStringExtra("videoId")!!
+        val seekToPosition = intent.getLongExtra("seekToPosition", 0L)
+        playOnBackgroundMode(this, videoId, seekToPosition)
+        return super.onStartCommand(intent, flags, startId)
+    }
+
+    /**
+     * Gets the video data and prepares the [player].
+     */
+    private fun playOnBackgroundMode(
+        c: Context,
+        videoId: String,
+        seekToPosition: Long = 0
+    ) {
+        runBlocking {
+            val job = launch {
+                response = RetrofitInstance.api.getStreams(videoId)
+            }
+            // Wait until the job is done, to load correctly later in the player
+            job.join()
+
+            initializePlayer(c)
+            initializePlayerNotification(c)
+
+            player?.apply {
+                playWhenReady = playWhenReadyPlayer
+                prepare()
+            }
+
+            if (seekToPosition != 0L) player?.seekTo(seekToPosition)
+        }
+    }
+
+    /**
+     * create the player
+     */
     private fun initializePlayer(c: Context) {
         audioAttributes = AudioAttributes.Builder()
             .setUsage(C.USAGE_MEDIA)
@@ -147,42 +189,7 @@ class BackgroundMode {
         mediaSessionConnector.setPlayer(player)
     }
 
-    /**
+    override fun onBind(p0: Intent?): IBinder? {
-     * Gets the video data and prepares the [player].
+        TODO("Not yet implemented")
-     */
-    fun playOnBackgroundMode(
-        c: Context,
-        videoId: String,
-        seekToPosition: Long = 0
-    ) {
-        runBlocking {
-            val job = launch {
-                response = RetrofitInstance.api.getStreams(videoId)
-            }
-            // Wait until the job is done, to load correctly later in the player
-            job.join()
-
-            initializePlayer(c)
-            initializePlayerNotification(c)
-
-            player?.apply {
-                playWhenReady = playWhenReadyPlayer
-                prepare()
-            }
-
-            if (!seekToPosition.equals(0)) player?.seekTo(seekToPosition)
-        }
-    }
-
-    /**
-     * Creates a singleton of this class, to not create a new [player] every time.
-     */
-    companion object {
-        private var INSTANCE: BackgroundMode? = null
-
-        fun getInstance(): BackgroundMode {
-            if (INSTANCE == null) INSTANCE = BackgroundMode()
-            return INSTANCE!!
-        }
     }
 }