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      1 /*
      2  * Copyright 2017 The Android Open Source Project
      3  *
      4  * Licensed under the Apache License, Version 2.0 (the "License");
      5  * you may not use this file except in compliance with the License.
      6  * You may obtain a copy of the License at
      7  *
      8  *     http://www.apache.org/licenses/LICENSE-2.0
      9  *
     10  * Unless required by applicable law or agreed to in writing, software
     11  * distributed under the License is distributed on an "AS IS" BASIS,
     12  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
     13  * See the License for the specific language governing permissions and
     14  * limitations under the License.
     15  */
     16 
     17 package com.example.android.mediasession.service;
     18 
     19 import android.support.v4.media.session.PlaybackStateCompat;
     20 import android.support.v4.media.session.MediaSessionCompat;
     21 
     22 import com.example.android.mediasession.service.players.MediaPlayerAdapter;
     23 
     24 /**
     25  * Listener to provide state updates from {@link MediaPlayerAdapter} (the media player)
     26  * to {@link MusicService} (the service that holds our {@link MediaSessionCompat}.
     27  */
     28 public abstract class PlaybackInfoListener {
     29 
     30     public abstract void onPlaybackStateChange(PlaybackStateCompat state);
     31 
     32     public void onPlaybackCompleted() {
     33     }
     34 }