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/*
* Copyright (C) 2007 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.cyngn.eleven;
import android.content.Context;
import android.content.Intent;
import android.media.AudioManager;
import android.os.Handler;
import android.os.Message;
import android.os.PowerManager;
import android.os.PowerManager.WakeLock;
import android.support.v4.content.WakefulBroadcastReceiver;
import android.util.Log;
import android.view.KeyEvent;
import com.cyngn.eleven.ui.activities.HomeActivity;
/**
* Used to control headset playback.
* Single press: pause/resume
* Double press: next track
* Triple press: previous track
* Long press: voice search
*/
public class MediaButtonIntentReceiver extends WakefulBroadcastReceiver {
private static final boolean DEBUG = false;
private static final String TAG = "MediaButtonIntentReceiver";
private static final int MSG_LONGPRESS_TIMEOUT = 1;
private static final int MSG_HEADSET_DOUBLE_CLICK_TIMEOUT = 2;
private static final int LONG_PRESS_DELAY = 1000;
private static final int DOUBLE_CLICK = 800;
private static WakeLock mWakeLock = null;
private static int mClickCounter = 0;
private static long mLastClickTime = 0;
private static boolean mDown = false;
private static boolean mLaunched = false;
private static Handler mHandler = new Handler() {
/**
* {@inheritDoc}
*/
@Override
public void handleMessage(final Message msg) {
switch (msg.what) {
case MSG_LONGPRESS_TIMEOUT:
if (DEBUG) Log.v(TAG, "Handling longpress timeout, launched " + mLaunched);
if (!mLaunched) {
final Context context = (Context)msg.obj;
final Intent i = new Intent();
i.setClass(context, HomeActivity.class);
i.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK | Intent.FLAG_ACTIVITY_CLEAR_TOP);
context.startActivity(i);
mLaunched = true;
}
break;
case MSG_HEADSET_DOUBLE_CLICK_TIMEOUT:
final int clickCount = msg.arg1;
final String command;
if (DEBUG) Log.v(TAG, "Handling headset click, count = " + clickCount);
switch (clickCount) {
case 1: command = MusicPlaybackService.CMDTOGGLEPAUSE; break;
case 2: command = MusicPlaybackService.CMDNEXT; break;
case 3: command = MusicPlaybackService.CMDPREVIOUS; break;
default: command = null; break;
}
if (command != null) {
final Context context = (Context)msg.obj;
startService(context, command);
}
break;
}
releaseWakeLockIfHandlerIdle();
}
};
/**
* {@inheritDoc}
*/
@Override
public void onReceive(final Context context, final Intent intent) {
if (DEBUG) Log.v(TAG, "Received intent: " + intent);
final String intentAction = intent.getAction();
if (AudioManager.ACTION_AUDIO_BECOMING_NOISY.equals(intentAction)) {
startService(context, MusicPlaybackService.CMDPAUSE);
} else if (Intent.ACTION_MEDIA_BUTTON.equals(intentAction)) {
final KeyEvent event = (KeyEvent)intent.getParcelableExtra(Intent.EXTRA_KEY_EVENT);
if (event == null) {
return;
}
final int keycode = event.getKeyCode();
final int action = event.getAction();
final long eventtime = event.getEventTime();
String command = null;
switch (keycode) {
case KeyEvent.KEYCODE_MEDIA_STOP:
command = MusicPlaybackService.CMDSTOP;
break;
case KeyEvent.KEYCODE_HEADSETHOOK:
case KeyEvent.KEYCODE_MEDIA_PLAY_PAUSE:
command = MusicPlaybackService.CMDTOGGLEPAUSE;
break;
case KeyEvent.KEYCODE_MEDIA_NEXT:
command = MusicPlaybackService.CMDNEXT;
break;
case KeyEvent.KEYCODE_MEDIA_PREVIOUS:
command = MusicPlaybackService.CMDPREVIOUS;
break;
case KeyEvent.KEYCODE_MEDIA_PAUSE:
command = MusicPlaybackService.CMDPAUSE;
break;
case KeyEvent.KEYCODE_MEDIA_PLAY:
command = MusicPlaybackService.CMDPLAY;
break;
}
if (command != null) {
if (action == KeyEvent.ACTION_DOWN) {
if (mDown) {
if (MusicPlaybackService.CMDTOGGLEPAUSE.equals(command)
|| MusicPlaybackService.CMDPLAY.equals(command)) {
if (mLastClickTime != 0
&& eventtime - mLastClickTime > LONG_PRESS_DELAY) {
acquireWakeLockAndSendMessage(context,
mHandler.obtainMessage(MSG_LONGPRESS_TIMEOUT, context), 0);
}
}
} else if (event.getRepeatCount() == 0) {
// Only consider the first event in a sequence, not the repeat events,
// so that we don't trigger in cases where the first event went to
// a different app (e.g. when the user ends a phone call by
// long pressing the headset button)
// The service may or may not be running, but we need to send it
// a command.
if (keycode == KeyEvent.KEYCODE_HEADSETHOOK) {
if (eventtime - mLastClickTime >= DOUBLE_CLICK) {
mClickCounter = 0;
}
mClickCounter++;
if (DEBUG) Log.v(TAG, "Got headset click, count = " + mClickCounter);
mHandler.removeMessages(MSG_HEADSET_DOUBLE_CLICK_TIMEOUT);
Message msg = mHandler.obtainMessage(
MSG_HEADSET_DOUBLE_CLICK_TIMEOUT, mClickCounter, 0, context);
long delay = mClickCounter < 3 ? DOUBLE_CLICK : 0;
if (mClickCounter >= 3) {
mClickCounter = 0;
}
mLastClickTime = eventtime;
acquireWakeLockAndSendMessage(context, msg, delay);
} else {
startService(context, command);
}
mLaunched = false;
mDown = true;
}
} else {
mHandler.removeMessages(MSG_LONGPRESS_TIMEOUT);
mDown = false;
}
if (isOrderedBroadcast()) {
abortBroadcast();
}
releaseWakeLockIfHandlerIdle();
}
}
}
private static void startService(Context context, String command) {
final Intent i = new Intent(context, MusicPlaybackService.class);
i.setAction(MusicPlaybackService.SERVICECMD);
i.putExtra(MusicPlaybackService.CMDNAME, command);
i.putExtra(MusicPlaybackService.FROM_MEDIA_BUTTON, true);
startWakefulService(context, i);
}
private static void acquireWakeLockAndSendMessage(Context context, Message msg, long delay) {
if (mWakeLock == null) {
Context appContext = context.getApplicationContext();
PowerManager pm = (PowerManager) appContext.getSystemService(Context.POWER_SERVICE);
mWakeLock = pm.newWakeLock(PowerManager.PARTIAL_WAKE_LOCK, "Eleven headset button");
mWakeLock.setReferenceCounted(false);
}
if (DEBUG) Log.v(TAG, "Acquiring wake lock and sending " + msg.what);
// Make sure we don't indefinitely hold the wake lock under any circumstances
mWakeLock.acquire(10000);
mHandler.sendMessageDelayed(msg, delay);
}
private static void releaseWakeLockIfHandlerIdle() {
if (mHandler.hasMessages(MSG_LONGPRESS_TIMEOUT)
|| mHandler.hasMessages(MSG_HEADSET_DOUBLE_CLICK_TIMEOUT)) {
if (DEBUG) Log.v(TAG, "Handler still has messages pending, not releasing wake lock");
return;
}
if (mWakeLock != null) {
if (DEBUG) Log.v(TAG, "Releasing wake lock");
mWakeLock.release();
mWakeLock = null;
}
}
}
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