1 /*
2  * Copyright (C) 2011 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.musicplayer;
18 
19 /**
20  * Represents something that can react to audio focus events. We implement this instead of just
21  * using AudioManager.OnAudioFocusChangeListener because that interface is only available in SDK
22  * level 8 and above, and we want our application to work on previous SDKs.
23  */
24 public interface MusicFocusable {
25     /** Signals that audio focus was gained. */
onGainedAudioFocus()26     public void onGainedAudioFocus();
27 
28     /**
29      * Signals that audio focus was lost.
30      *
31      * @param canDuck If true, audio can continue in "ducked" mode (low volume). Otherwise, all
32      * audio must stop.
33      */
onLostAudioFocus(boolean canDuck)34     public void onLostAudioFocus(boolean canDuck);
35 }
36