| /* |
| * Copyright (C) 2014 The Android Open Source Project |
| * |
| * Licensed under the Apache License, Version 2.0 (the "License"); |
| * you may not use this file except in compliance with the License. |
| * You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| */ |
| |
| package com.android.server.telecom; |
| |
| import android.content.BroadcastReceiver; |
| import android.content.Context; |
| import android.content.Intent; |
| import android.content.IntentFilter; |
| import android.media.AudioManager; |
| |
| import com.android.internal.util.IndentingPrintWriter; |
| |
| import java.util.Collections; |
| import java.util.Set; |
| import java.util.concurrent.ConcurrentHashMap; |
| |
| /** Listens for and caches headset state. */ |
| class WiredHeadsetManager { |
| interface Listener { |
| void onWiredHeadsetPluggedInChanged(boolean oldIsPluggedIn, boolean newIsPluggedIn); |
| } |
| |
| /** Receiver for wired headset plugged and unplugged events. */ |
| private class WiredHeadsetBroadcastReceiver extends BroadcastReceiver { |
| @Override |
| public void onReceive(Context context, Intent intent) { |
| if (intent.getAction().equals(Intent.ACTION_HEADSET_PLUG)) { |
| boolean isPluggedIn = intent.getIntExtra("state", 0) == 1; |
| Log.v(WiredHeadsetManager.this, "ACTION_HEADSET_PLUG event, plugged in: %b", |
| isPluggedIn); |
| onHeadsetPluggedInChanged(isPluggedIn); |
| } |
| } |
| } |
| |
| private final WiredHeadsetBroadcastReceiver mReceiver; |
| private boolean mIsPluggedIn; |
| /** |
| * ConcurrentHashMap constructor params: 8 is initial table size, 0.9f is |
| * load factor before resizing, 1 means we only expect a single thread to |
| * access the map so make only a single shard |
| */ |
| private final Set<Listener> mListeners = Collections.newSetFromMap( |
| new ConcurrentHashMap<Listener, Boolean>(8, 0.9f, 1)); |
| |
| WiredHeadsetManager(Context context) { |
| mReceiver = new WiredHeadsetBroadcastReceiver(); |
| |
| AudioManager audioManager = (AudioManager) context.getSystemService(Context.AUDIO_SERVICE); |
| mIsPluggedIn = audioManager.isWiredHeadsetOn(); |
| |
| // Register for misc other intent broadcasts. |
| IntentFilter intentFilter = new IntentFilter(Intent.ACTION_HEADSET_PLUG); |
| context.registerReceiver(mReceiver, intentFilter); |
| } |
| |
| void addListener(Listener listener) { |
| mListeners.add(listener); |
| } |
| |
| void removeListener(Listener listener) { |
| if (listener != null) { |
| mListeners.remove(listener); |
| } |
| } |
| |
| boolean isPluggedIn() { |
| return mIsPluggedIn; |
| } |
| |
| private void onHeadsetPluggedInChanged(boolean isPluggedIn) { |
| if (mIsPluggedIn != isPluggedIn) { |
| Log.v(this, "onHeadsetPluggedInChanged, mIsPluggedIn: %b -> %b", mIsPluggedIn, |
| isPluggedIn); |
| boolean oldIsPluggedIn = mIsPluggedIn; |
| mIsPluggedIn = isPluggedIn; |
| for (Listener listener : mListeners) { |
| listener.onWiredHeadsetPluggedInChanged(oldIsPluggedIn, mIsPluggedIn); |
| } |
| } |
| } |
| |
| /** |
| * Dumps the state of the {@link WiredHeadsetManager}. |
| * |
| * @param pw The {@code IndentingPrintWriter} to write the state to. |
| */ |
| public void dump(IndentingPrintWriter pw) { |
| pw.println("mIsPluggedIn: " + mIsPluggedIn); |
| } |
| } |