MediaStyleNotification.java

import android.support.v4.app.NotificationCompat;
import android.support.v4.content.ContextCompat;
import android.support.v4.media.app.NotificationCompat.MediaStyle;

//...

// You only need to create the channel on API 26+ devices
if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.O) {
  createChannel();
}
NotificationCompat.Builder notificationBuilder =
       new NotificationCompat.Builder(mContext, CHANNEL_ID);
notificationBuilder
       .setStyle(
               new MediaStyle()
                       .setMediaSession(token)
                       .setShowCancelButton(true)
                       .setCancelButtonIntent(
                           MediaButtonReceiver.buildMediaButtonPendingIntent(
                               mContext, PlaybackStateCompat.ACTION_STOP)))
       .setColor(ContextCompat.getColor(mContext, R.color.notification_bg))
       .setSmallIcon(R.drawable.ic_stat_image_audiotrack)
       .setVisibility(NotificationCompat.VISIBILITY_PUBLIC)
       .setOnlyAlertOnce(true)
       .setContentIntent(createContentIntent())
       .setContentTitle(“Album”)
       .setContentText(“Artist”)
       .setSubText(“Song Name”)
       .setLargeIcon(MusicLibrary.getAlbumBitmap(mContext, description.getMediaId()))
       .setDeleteIntent(MediaButtonReceiver.buildMediaButtonPendingIntent(
               mService, PlaybackStateCompat.ACTION_STOP));