add media session & update exo player to 2.14.0

app/build.gradle

@@ -11,7 +11,7 @@ android {
         minSdkVersion 23
         targetSdkVersion 30
         versionCode 4180 //00.04.100
-        versionName "0.4.2-alpha1"
+        versionName "0.4.2-alpha2"
 
         testInstrumentationRunner "androidx.test.runner.AndroidJUnitRunner"
         resValue "string", "build_time", buildTime()
@@ -55,10 +55,11 @@ dependencies {
 
     implementation 'com.google.android.material:material:1.3.0'
     implementation 'com.google.code.gson:gson:2.8.7'
-    implementation 'com.google.android.exoplayer:exoplayer-core:2.13.3'
-    implementation 'com.google.android.exoplayer:exoplayer-hls:2.13.3'
-    implementation 'com.google.android.exoplayer:exoplayer-dash:2.13.3'
-    implementation 'com.google.android.exoplayer:exoplayer-ui:2.13.3'
+    implementation 'com.google.android.exoplayer:exoplayer-core:2.14.0'
+    implementation 'com.google.android.exoplayer:exoplayer-hls:2.14.0'
+    implementation 'com.google.android.exoplayer:exoplayer-dash:2.14.0'
+    implementation 'com.google.android.exoplayer:exoplayer-ui:2.14.0'
+    implementation 'com.google.android.exoplayer:extension-mediasession:2.14.0'
 
     implementation 'org.jsoup:jsoup:1.13.1'
     implementation 'com.github.bumptech.glide:glide:4.12.0'

app/src/main/java/org/mosad/teapod/ui/activity/player/PlayerActivity.kt

@@ -26,9 +26,7 @@ import com.google.android.exoplayer2.ui.StyledPlayerControlView
 import com.google.android.exoplayer2.util.Util
 import kotlinx.android.synthetic.main.activity_player.*
 import kotlinx.android.synthetic.main.player_controls.*
-import kotlinx.coroutines.Dispatchers
 import kotlinx.coroutines.launch
-import kotlinx.coroutines.withContext
 import org.mosad.teapod.R
 import org.mosad.teapod.preferences.Preferences
 import org.mosad.teapod.ui.components.EpisodesListPlayer
@@ -187,7 +185,7 @@ class PlayerActivity : AppCompatActivity() {
      * set play when ready and listeners
      */
     private fun initExoPlayer() {
-        model.player.addListener(object : Player.EventListener {
+        model.player.addListener(object : Player.Listener {
             override fun onPlaybackStateChanged(state: Int) {
                 super.onPlaybackStateChanged(state)
 
@@ -208,7 +206,7 @@ class PlayerActivity : AppCompatActivity() {
                 }
             }
         })
-
+        
         // start playing the current episode, after all needed player components have been initialized
         model.playEpisode(model.currentEpisode, true)
     }
@@ -256,30 +254,26 @@ class PlayerActivity : AppCompatActivity() {
 
         timerUpdates = Timer().scheduleAtFixedRate(0, 500) {
             lifecycleScope.launch {
-                var btnNextEpIsVisible: Boolean
-                var controlsVisible: Boolean
+                val btnNextEpIsVisible = button_next_ep.isVisible
+                val controlsVisible = controller.isVisible
 
-                withContext(Dispatchers.Main) {
-                    if (model.player.duration > 0) {
-                        remainingTime = model.player.duration - model.player.currentPosition
-                        remainingTime = if (remainingTime < 0) 0 else remainingTime
-                    }
-                    btnNextEpIsVisible = button_next_ep.isVisible
-                    controlsVisible = controller.isVisible
+                if (model.player.duration > 0) {
+                    remainingTime = model.player.duration - model.player.currentPosition
+                    remainingTime = if (remainingTime < 0) 0 else remainingTime
                 }
 
                 if (remainingTime in 1..20000) {
                     // if the next ep button is not visible, make it visible. Don't show in pip mode
                     if (!btnNextEpIsVisible && model.nextEpisode != null && Preferences.autoplay && !isInPiPMode()) {
-                        withContext(Dispatchers.Main) { showButtonNextEp() }
+                        showButtonNextEp()
                     }
                 } else if (btnNextEpIsVisible) {
-                    withContext(Dispatchers.Main) { hideButtonNextEp() }
+                    hideButtonNextEp()
                 }
 
                 // if controls are visible, update them
                 if (controlsVisible) {
-                    withContext(Dispatchers.Main) { updateControls() }
+                    updateControls()
                 }
             }
         }

app/src/main/java/org/mosad/teapod/ui/activity/player/PlayerViewModel.kt

@@ -2,12 +2,15 @@ package org.mosad.teapod.ui.activity.player
 
 import android.app.Application
 import android.net.Uri
+import android.support.v4.media.session.MediaSessionCompat
+import android.support.v4.media.session.PlaybackStateCompat
 import android.util.Log
 import androidx.lifecycle.AndroidViewModel
 import androidx.lifecycle.viewModelScope
 import com.google.android.exoplayer2.C
 import com.google.android.exoplayer2.MediaItem
 import com.google.android.exoplayer2.SimpleExoPlayer
+import com.google.android.exoplayer2.ext.mediasession.MediaSessionConnector
 import com.google.android.exoplayer2.source.MediaSource
 import com.google.android.exoplayer2.source.hls.HlsMediaSource
 import com.google.android.exoplayer2.upstream.DefaultDataSourceFactory
@@ -23,6 +26,7 @@ import org.mosad.teapod.util.Media
 import java.util.*
 import kotlin.collections.ArrayList
 
+
 /**
  * PlayerViewModel handles all stuff related to media/episodes.
  * When currentEpisode is changed the player will start playing it (not initial media),
@@ -31,10 +35,13 @@ import kotlin.collections.ArrayList
 class PlayerViewModel(application: Application) : AndroidViewModel(application) {
 
     val player = SimpleExoPlayer.Builder(application).build()
-    val dataSourceFactory = DefaultDataSourceFactory(application, Util.getUserAgent(application, "Teapod"))
+    private val dataSourceFactory = DefaultDataSourceFactory(application, Util.getUserAgent(application, "Teapod"))
+    private val mediaSession = MediaSessionCompat(application, "TEAPOD_PLAYER_SESSION")
+
+    lateinit var mStateBuilder: PlaybackStateCompat
 
     val currentEpisodeChangedListener = ArrayList<() -> Unit>()
-    val preferredLanguage = if (Preferences.preferSecondary) Locale.JAPANESE else Locale.GERMAN
+    private val preferredLanguage = if (Preferences.preferSecondary) Locale.JAPANESE else Locale.GERMAN
 
     var media: Media = Media(-1, "", DataTypes.MediaType.OTHER)
         internal set
@@ -45,13 +52,30 @@ class PlayerViewModel(application: Application) : AndroidViewModel(application)
     var currentLanguage: Locale = Locale.ROOT
         internal set
 
+    init {
+        initMediaSession()
+    }
+
     override fun onCleared() {
         super.onCleared()
+
+        mediaSession.release()
         player.release()
 
         Log.d(javaClass.name, "Released player")
     }
 
+    /**
+     * set the media session to active
+     * create a media session connector to set title and description
+     */
+    private fun initMediaSession() {
+        val mediaSessionConnector = MediaSessionConnector(mediaSession)
+        mediaSessionConnector.setPlayer(player)
+
+        mediaSession.isActive = true
+    }
+
     fun loadMedia(mediaId: Int, episodeId: Int) {
         runBlocking {
             media = AoDParser.getMediaById(mediaId)
@@ -115,6 +139,9 @@ class PlayerViewModel(application: Application) : AndroidViewModel(application)
         }
     }
 
+    /**
+     * change the players media source and start playback
+     */
     fun playMedia(source: MediaSource, replace: Boolean = false, seekPosition: Long = 0) {
         if (replace || player.contentDuration == C.TIME_UNSET) {
             player.setMediaSource(source)