1 /* 2 * Copyright (C) 2015 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 package com.android.dialer.app.voicemail; 17 18 import android.content.BroadcastReceiver; 19 import android.content.Context; 20 import android.content.Intent; 21 import android.content.IntentFilter; 22 import android.media.AudioManager; 23 import com.android.dialer.common.LogUtil; 24 25 /** Listens for and caches headset state. */ 26 class WiredHeadsetManager { 27 28 private static final String TAG = WiredHeadsetManager.class.getSimpleName(); 29 private final WiredHeadsetBroadcastReceiver receiver; 30 private boolean isPluggedIn; 31 private Listener listener; 32 private Context context; 33 WiredHeadsetManager(Context context)34 WiredHeadsetManager(Context context) { 35 this.context = context; 36 receiver = new WiredHeadsetBroadcastReceiver(); 37 38 AudioManager audioManager = (AudioManager) context.getSystemService(Context.AUDIO_SERVICE); 39 isPluggedIn = audioManager.isWiredHeadsetOn(); 40 } 41 setListener(Listener listener)42 void setListener(Listener listener) { 43 this.listener = listener; 44 } 45 isPluggedIn()46 boolean isPluggedIn() { 47 return isPluggedIn; 48 } 49 registerReceiver()50 void registerReceiver() { 51 // Register for misc other intent broadcasts. 52 IntentFilter intentFilter = new IntentFilter(Intent.ACTION_HEADSET_PLUG); 53 context.registerReceiver(receiver, intentFilter); 54 } 55 unregisterReceiver()56 void unregisterReceiver() { 57 context.unregisterReceiver(receiver); 58 } 59 onHeadsetPluggedInChanged(boolean isPluggedIn)60 private void onHeadsetPluggedInChanged(boolean isPluggedIn) { 61 if (this.isPluggedIn != isPluggedIn) { 62 LogUtil.v( 63 TAG, 64 "onHeadsetPluggedInChanged, mIsPluggedIn: " + this.isPluggedIn + " -> " + isPluggedIn); 65 boolean oldIsPluggedIn = this.isPluggedIn; 66 this.isPluggedIn = isPluggedIn; 67 if (listener != null) { 68 listener.onWiredHeadsetPluggedInChanged(oldIsPluggedIn, this.isPluggedIn); 69 } 70 } 71 } 72 73 interface Listener { 74 onWiredHeadsetPluggedInChanged(boolean oldIsPluggedIn, boolean newIsPluggedIn)75 void onWiredHeadsetPluggedInChanged(boolean oldIsPluggedIn, boolean newIsPluggedIn); 76 } 77 78 /** Receiver for wired headset plugged and unplugged events. */ 79 private class WiredHeadsetBroadcastReceiver extends BroadcastReceiver { 80 81 @Override onReceive(Context context, Intent intent)82 public void onReceive(Context context, Intent intent) { 83 if (AudioManager.ACTION_HEADSET_PLUG.equals(intent.getAction())) { 84 boolean isPluggedIn = intent.getIntExtra("state", 0) == 1; 85 LogUtil.v(TAG, "ACTION_HEADSET_PLUG event, plugged in: " + isPluggedIn); 86 onHeadsetPluggedInChanged(isPluggedIn); 87 } 88 } 89 } 90 } 91