Add play and pause functionality

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

@@ -5,6 +5,7 @@ import android.app.NotificationChannel
 import android.app.NotificationManager
 import android.app.Service
 import android.content.Intent
+import android.os.Binder
 import android.os.Build
 import android.os.Handler
 import android.os.IBinder
@@ -87,6 +88,11 @@ class BackgroundMode : Service() {
      */
     private val handler = Handler(Looper.getMainLooper())
 
+    /**
+     * Used for connecting to the AudioPlayerFragment
+     */
+    private val binder = LocalBinder()
+
     /**
      * Setting the required [Notification] for running as a foreground service
      */
@@ -381,7 +387,24 @@ class BackgroundMode : Service() {
         super.onDestroy()
     }
 
-    override fun onBind(p0: Intent?): IBinder? {
+    inner class LocalBinder : Binder() {
-        return null
+        // Return this instance of [BackgroundMode] so clients can call public methods
+        fun getService(): BackgroundMode = this@BackgroundMode
+    }
+
+    override fun onBind(p0: Intent?): IBinder {
+        return binder
+    }
+
+    fun getCurrentPosition() = player?.currentPosition
+
+    fun seekToPosition(position: Long) = player?.seekTo(position)
+
+    fun pause() {
+        player?.pause()
+    }
+
+    fun play() {
+        player?.play()
     }
 }

app/src/main/java/com/github/libretube/ui/fragments/AudioPlayerFragment.kt

@@ -1,12 +1,19 @@
 package com.github.libretube.ui.fragments
 
+import android.content.ComponentName
+import android.content.Context
+import android.content.Intent
+import android.content.ServiceConnection
 import android.os.Bundle
+import android.os.IBinder
 import android.view.LayoutInflater
 import android.view.View
 import android.view.ViewGroup
+import com.github.libretube.R
 import com.github.libretube.api.obj.StreamItem
 import com.github.libretube.databinding.FragmentAudioPlayerBinding
 import com.github.libretube.extensions.toID
+import com.github.libretube.services.BackgroundMode
 import com.github.libretube.ui.base.BaseFragment
 import com.github.libretube.util.ImageHelper
 import com.github.libretube.util.NavigationHelper
@@ -17,6 +24,31 @@ class AudioPlayerFragment : BaseFragment() {
     private val onTrackChangeListener: (StreamItem) -> Unit = {
         updateStreamInfo()
     }
+    private var isPaused: Boolean = false
+
+    private lateinit var playerService: BackgroundMode
+    private var mBound: Boolean = false
+
+    /** Defines callbacks for service binding, passed to bindService()  */
+    private val connection = object : ServiceConnection {
+        override fun onServiceConnected(className: ComponentName, service: IBinder) {
+            // We've bound to LocalService, cast the IBinder and get LocalService instance
+            val binder = service as BackgroundMode.LocalBinder
+            playerService = binder.getService()
+            mBound = true
+        }
+
+        override fun onServiceDisconnected(arg0: ComponentName) {
+            mBound = false
+        }
+    }
+
+    override fun onCreate(savedInstanceState: Bundle?) {
+        super.onCreate(savedInstanceState)
+        Intent(activity, BackgroundMode::class.java).also { intent ->
+            activity?.bindService(intent, connection, Context.BIND_AUTO_CREATE)
+        }
+    }
 
     override fun onCreateView(
         inflater: LayoutInflater,
@@ -42,6 +74,13 @@ class AudioPlayerFragment : BaseFragment() {
 
         PlayingQueue.addOnTrackChangedListener(onTrackChangeListener)
 
+        binding.playPause.setOnClickListener {
+            if (mBound == false) return@setOnClickListener
+            if (isPaused) playerService.play() else playerService.pause()
+            binding.playPause.setIconResource(if (isPaused) R.drawable.ic_pause else R.drawable.ic_play)
+            isPaused = !isPaused
+        }
+
         updateStreamInfo()
     }
 
@@ -61,6 +100,7 @@ class AudioPlayerFragment : BaseFragment() {
     override fun onDestroy() {
         super.onDestroy()
 
+        activity?.unbindService(connection)
         // unregister the listener
         PlayingQueue.removeOnTrackChangedListener(onTrackChangeListener)
     }

app/src/main/java/com/github/libretube/util/PlayingQueue.kt

@@ -68,7 +68,9 @@ object PlayingQueue {
     fun updateCurrent(streamItem: StreamItem) {
         currentStream = streamItem
         onTrackChangedListeners.forEach {
-            it.invoke(streamItem)
+            runCatching {
+                it.invoke(streamItem)
+            }
         }
         if (!contains(streamItem)) queue.add(streamItem)
     }

app/src/main/res/layout/fragment_audio_player.xml

@@ -81,7 +81,7 @@
             android:insetTop="0dp"
             android:insetRight="0dp"
             android:insetBottom="0dp"
-            app:icon="@drawable/ic_play"
+            app:icon="@drawable/ic_pause"
             app:iconSize="24dp"
             app:shapeAppearanceOverlay="@style/ShapeAppearance.Material3.Corner.Full" />