1 /* 2 * Copyright (C) 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.googlecode.android_scripting.facade.media; 18 19 import android.app.Service; 20 import android.content.Context; 21 import android.media.AudioManager; 22 import android.media.AudioManager.OnAudioFocusChangeListener; 23 24 import com.googlecode.android_scripting.facade.EventFacade; 25 import com.googlecode.android_scripting.facade.FacadeManager; 26 import com.googlecode.android_scripting.jsonrpc.RpcReceiver; 27 import com.googlecode.android_scripting.rpc.Rpc; 28 29 public class AudioManagerFacade extends RpcReceiver { 30 31 private final Service mService; 32 private final EventFacade mEventFacade; 33 private final AudioManager mAudio; 34 private final OnAudioFocusChangeListener mFocusChangeListener; 35 private boolean mIsFocused; 36 37 public AudioManagerFacade(FacadeManager manager) { 38 super(manager); 39 mService = manager.getService(); 40 mEventFacade = manager.getReceiver(EventFacade.class); 41 mAudio = (AudioManager) mService.getSystemService(Context.AUDIO_SERVICE); 42 mFocusChangeListener = new OnAudioFocusChangeListener() { 43 public void onAudioFocusChange(int focusChange) { 44 if (focusChange == AudioManager.AUDIOFOCUS_LOSS_TRANSIENT_CAN_DUCK) { 45 mIsFocused = false; 46 } else if (focusChange == AudioManager.AUDIOFOCUS_GAIN) { 47 mIsFocused = true; 48 } 49 } 50 }; 51 } 52 53 @Rpc(description = "Checks whether any music is active.") 54 public Boolean audioIsMusicActive() { 55 return mAudio.isMusicActive(); 56 } 57 58 @Rpc(description = "Checks whether A2DP audio routing to the Bluetooth headset is on or off.") 59 public Boolean audioIsBluetoothA2dpOn() { 60 return mAudio.isBluetoothA2dpOn(); 61 } 62 63 @Rpc(description = "Request audio focus for sl4a.") 64 public Boolean audioRequestAudioFocus() { 65 int status = mAudio.requestAudioFocus(mFocusChangeListener, 66 AudioManager.STREAM_MUSIC, 67 AudioManager.AUDIOFOCUS_GAIN_TRANSIENT_MAY_DUCK); 68 if (status == AudioManager.AUDIOFOCUS_REQUEST_GRANTED) { 69 mIsFocused = true; 70 return true; 71 } 72 mIsFocused = false; 73 return false; 74 } 75 76 @Rpc(description = "Whether sl4a has the audio focus or not.") 77 public Boolean audioIsFocused() { 78 return mIsFocused; 79 } 80 81 @Override 82 public void shutdown() { 83 mAudio.abandonAudioFocus(mFocusChangeListener); 84 } 85 } 86
