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 android.util.Log; 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 mReceiver; 30 private boolean mIsPluggedIn; 31 private Listener mListener; 32 private Context mContext; 33 WiredHeadsetManager(Context context)34 WiredHeadsetManager(Context context) { 35 mContext = context; 36 mReceiver = new WiredHeadsetBroadcastReceiver(); 37 38 AudioManager audioManager = (AudioManager) context.getSystemService(Context.AUDIO_SERVICE); 39 mIsPluggedIn = audioManager.isWiredHeadsetOn(); 40 } 41 setListener(Listener listener)42 void setListener(Listener listener) { 43 mListener = listener; 44 } 45 isPluggedIn()46 boolean isPluggedIn() { 47 return mIsPluggedIn; 48 } 49 registerReceiver()50 void registerReceiver() { 51 // Register for misc other intent broadcasts. 52 IntentFilter intentFilter = new IntentFilter(Intent.ACTION_HEADSET_PLUG); 53 mContext.registerReceiver(mReceiver, intentFilter); 54 } 55 unregisterReceiver()56 void unregisterReceiver() { 57 mContext.unregisterReceiver(mReceiver); 58 } 59 onHeadsetPluggedInChanged(boolean isPluggedIn)60 private void onHeadsetPluggedInChanged(boolean isPluggedIn) { 61 if (mIsPluggedIn != isPluggedIn) { 62 Log.v(TAG, "onHeadsetPluggedInChanged, mIsPluggedIn: " + mIsPluggedIn + " -> " + isPluggedIn); 63 boolean oldIsPluggedIn = mIsPluggedIn; 64 mIsPluggedIn = isPluggedIn; 65 if (mListener != null) { 66 mListener.onWiredHeadsetPluggedInChanged(oldIsPluggedIn, mIsPluggedIn); 67 } 68 } 69 } 70 71 interface Listener { 72 onWiredHeadsetPluggedInChanged(boolean oldIsPluggedIn, boolean newIsPluggedIn)73 void onWiredHeadsetPluggedInChanged(boolean oldIsPluggedIn, boolean newIsPluggedIn); 74 } 75 76 /** Receiver for wired headset plugged and unplugged events. */ 77 private class WiredHeadsetBroadcastReceiver extends BroadcastReceiver { 78 79 @Override onReceive(Context context, Intent intent)80 public void onReceive(Context context, Intent intent) { 81 if (AudioManager.ACTION_HEADSET_PLUG.equals(intent.getAction())) { 82 boolean isPluggedIn = intent.getIntExtra("state", 0) == 1; 83 Log.v(TAG, "ACTION_HEADSET_PLUG event, plugged in: " + isPluggedIn); 84 onHeadsetPluggedInChanged(isPluggedIn); 85 } 86 } 87 } 88 } 89