1 /*
2  * Copyright (C) 2022 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 android.platform.helpers.media;
18 
19 import android.media.session.MediaSession;
20 import android.media.session.PlaybackState;
21 
22 import java.util.ArrayList;
23 import java.util.List;
24 import java.util.function.Consumer;
25 
26 final class MediaSessionCallback extends MediaSession.Callback {
27     private final List<Consumer<Integer>> mOnMediaStateChangedListeners;
28     private final MockMediaPlayer mPlayer;
29 
MediaSessionCallback(MockMediaPlayer player)30     public MediaSessionCallback(MockMediaPlayer player) {
31         mPlayer = player;
32         mOnMediaStateChangedListeners = new ArrayList<>();
33     }
34 
35     @Override
onPlay()36     public void onPlay() {
37         mPlayer.start();
38         setCurrentMediaState(PlaybackState.STATE_PLAYING);
39     }
40 
41     @Override
onPause()42     public void onPause() {
43         mPlayer.pause();
44         setCurrentMediaState(PlaybackState.STATE_PAUSED);
45     }
46 
47     @Override
onSkipToNext()48     public void onSkipToNext() {
49         mPlayer.pause();
50         setCurrentMediaState(PlaybackState.STATE_SKIPPING_TO_NEXT);
51     }
52 
53     @Override
onSkipToPrevious()54     public void onSkipToPrevious() {
55         mPlayer.pause();
56         setCurrentMediaState(PlaybackState.STATE_SKIPPING_TO_PREVIOUS);
57     }
58 
addOnMediaStateChangedListener(Consumer<Integer> listener)59     public void addOnMediaStateChangedListener(Consumer<Integer> listener) {
60         mOnMediaStateChangedListeners.add(listener);
61     }
62 
setCurrentMediaState(int state)63     private void setCurrentMediaState(int state) {
64         for (Consumer<Integer> listener : mOnMediaStateChangedListeners) {
65             listener.accept(state);
66         }
67     }
68 }
69