Example of adding custom action icon for android auto

android/app/src/main/java/com/audiobookshelf/app/player/MediaSessionCallback.kt

@@ -7,8 +7,10 @@ import android.os.Handler
 import android.os.Looper
 import android.os.Message
 import android.support.v4.media.session.MediaSessionCompat
+import android.support.v4.media.session.PlaybackStateCompat
 import android.util.Log
 import android.view.KeyEvent
+import com.audiobookshelf.app.R
 import com.audiobookshelf.app.data.LibraryItemWrapper
 import com.audiobookshelf.app.data.PodcastEpisode
 import java.util.*
@@ -217,4 +219,12 @@ class MediaSessionCallback(var playerNotificationService:PlayerNotificationServi
     }
   }
 
+  // Example Using a custom action in android auto
+//  override fun onCustomAction(action: String?, extras: Bundle?) {
+//    super.onCustomAction(action, extras)
+//
+//    if ("com.audiobookshelf.app.PLAYBACK_RATE" == action) {
+//
+//    }
+//  }
 }

android/app/src/main/java/com/audiobookshelf/app/player/PlayerNotificationService.kt

@@ -16,9 +16,11 @@ import android.util.Log
 import androidx.annotation.RequiresApi
 import androidx.core.app.NotificationCompat
 import androidx.core.content.ContextCompat
+import androidx.core.content.res.ResourcesCompat
 import androidx.media.MediaBrowserServiceCompat
 import androidx.media.utils.MediaConstants
 import com.audiobookshelf.app.BuildConfig
+import com.audiobookshelf.app.R
 import com.audiobookshelf.app.data.*
 import com.audiobookshelf.app.data.DeviceInfo
 import com.audiobookshelf.app.device.DeviceManager
@@ -66,7 +68,7 @@ class PlayerNotificationService : MediaBrowserServiceCompat()  {
   private lateinit var ctx:Context
   private lateinit var mediaSessionConnector: MediaSessionConnector
   private lateinit var playerNotificationManager: PlayerNotificationManager
-  private lateinit var mediaSession: MediaSessionCompat
+  lateinit var mediaSession: MediaSessionCompat
   private lateinit var transportControls:MediaControllerCompat.TransportControls
 
   lateinit var mediaManager: MediaManager
@@ -262,6 +264,18 @@ class PlayerNotificationService : MediaBrowserServiceCompat()  {
     mediaSessionConnector.setQueueNavigator(queueNavigator)
     mediaSessionConnector.setPlaybackPreparer(MediaSessionPlaybackPreparer(this))
 
+    // Example adding custom action with icon in android auto
+//    mediaSessionConnector.setCustomActionProviders(object : MediaSessionConnector.CustomActionProvider {
+//      override fun onCustomAction(player: Player, action: String, extras: Bundle?) {
+//      }
+//      override fun getCustomAction(player: Player): PlaybackStateCompat.CustomAction? {
+//        var icon = R.drawable.exo_icon_rewind
+//       return PlaybackStateCompat.CustomAction.Builder(
+//         "com.audiobookshelf.app.PLAYBACK_RATE", "Playback Rate", icon)
+//         .build()
+//      }
+//    })
+
     mediaSession.setCallback(MediaSessionCallback(this))
 
     initializeMPlayer()