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      1 /*
      2  * Copyright (C) 2007 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.android.music;
     18 
     19 import android.content.BroadcastReceiver;
     20 import android.content.Context;
     21 import android.content.Intent;
     22 import android.media.AudioManager;
     23 import android.os.Handler;
     24 import android.os.Message;
     25 import android.view.KeyEvent;
     26 
     27 /**
     28  *
     29  */
     30 public class MediaButtonIntentReceiver extends BroadcastReceiver {
     31     private static final int MSG_LONGPRESS_TIMEOUT = 1;
     32     private static final int LONG_PRESS_DELAY = 1000;
     33 
     34     private static long mLastClickTime = 0;
     35     private static boolean mDown = false;
     36     private static boolean mLaunched = false;
     37 
     38     private static Handler mHandler = new Handler() {
     39         @Override
     40         public void handleMessage(Message msg) {
     41             switch (msg.what) {
     42                 case MSG_LONGPRESS_TIMEOUT:
     43                     if (!mLaunched) {
     44                         Context context = (Context) msg.obj;
     45                         Intent i = new Intent();
     46                         i.putExtra("autoshuffle", "true");
     47                         i.setClass(context, MusicBrowserActivity.class);
     48                         i.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK | Intent.FLAG_ACTIVITY_CLEAR_TOP);
     49                         context.startActivity(i);
     50                         mLaunched = true;
     51                     }
     52                     break;
     53             }
     54         }
     55     };
     56 
     57     @Override
     58     public void onReceive(Context context, Intent intent) {
     59         String intentAction = intent.getAction();
     60         if (AudioManager.ACTION_AUDIO_BECOMING_NOISY.equals(intentAction)) {
     61             Intent i = new Intent(context, MediaPlaybackService.class);
     62             i.setAction(MediaPlaybackService.SERVICECMD);
     63             i.putExtra(MediaPlaybackService.CMDNAME, MediaPlaybackService.CMDPAUSE);
     64             context.startService(i);
     65         } else if (Intent.ACTION_MEDIA_BUTTON.equals(intentAction)) {
     66             KeyEvent event = (KeyEvent) intent.getParcelableExtra(Intent.EXTRA_KEY_EVENT);
     67 
     68             if (event == null) {
     69                 return;
     70             }
     71 
     72             int keycode = event.getKeyCode();
     73             int action = event.getAction();
     74             long eventtime = event.getEventTime();
     75 
     76             // single quick press: pause/resume.
     77             // double press: next track
     78             // long press: start auto-shuffle mode.
     79 
     80             String command = null;
     81             switch (keycode) {
     82                 case KeyEvent.KEYCODE_MEDIA_STOP:
     83                     command = MediaPlaybackService.CMDSTOP;
     84                     break;
     85                 case KeyEvent.KEYCODE_HEADSETHOOK:
     86                 case KeyEvent.KEYCODE_MEDIA_PLAY_PAUSE:
     87                     command = MediaPlaybackService.CMDTOGGLEPAUSE;
     88                     break;
     89                 case KeyEvent.KEYCODE_MEDIA_NEXT:
     90                     command = MediaPlaybackService.CMDNEXT;
     91                     break;
     92                 case KeyEvent.KEYCODE_MEDIA_PREVIOUS:
     93                     command = MediaPlaybackService.CMDPREVIOUS;
     94                     break;
     95                 case KeyEvent.KEYCODE_MEDIA_PAUSE:
     96                     command = MediaPlaybackService.CMDPAUSE;
     97                     break;
     98                 case KeyEvent.KEYCODE_MEDIA_PLAY:
     99                     command = MediaPlaybackService.CMDPLAY;
    100                     break;
    101             }
    102 
    103             if (command != null) {
    104                 if (action == KeyEvent.ACTION_DOWN) {
    105                     if (mDown) {
    106                         if ((MediaPlaybackService.CMDTOGGLEPAUSE.equals(command)
    107                                     || MediaPlaybackService.CMDPLAY.equals(command))
    108                                 && mLastClickTime != 0
    109                                 && eventtime - mLastClickTime > LONG_PRESS_DELAY) {
    110                             mHandler.sendMessage(
    111                                     mHandler.obtainMessage(MSG_LONGPRESS_TIMEOUT, context));
    112                         }
    113                     } else if (event.getRepeatCount() == 0) {
    114                         // only consider the first event in a sequence, not the repeat events,
    115                         // so that we don't trigger in cases where the first event went to
    116                         // a different app (e.g. when the user ends a phone call by
    117                         // long pressing the headset button)
    118 
    119                         // The service may or may not be running, but we need to send it
    120                         // a command.
    121                         Intent i = new Intent(context, MediaPlaybackService.class);
    122                         i.setAction(MediaPlaybackService.SERVICECMD);
    123                         if (keycode == KeyEvent.KEYCODE_HEADSETHOOK
    124                                 && eventtime - mLastClickTime < 300) {
    125                             i.putExtra(MediaPlaybackService.CMDNAME, MediaPlaybackService.CMDNEXT);
    126                             context.startService(i);
    127                             mLastClickTime = 0;
    128                         } else {
    129                             i.putExtra(MediaPlaybackService.CMDNAME, command);
    130                             context.startService(i);
    131                             mLastClickTime = eventtime;
    132                         }
    133 
    134                         mLaunched = false;
    135                         mDown = true;
    136                     }
    137                 } else {
    138                     mHandler.removeMessages(MSG_LONGPRESS_TIMEOUT);
    139                     mDown = false;
    140                 }
    141                 if (isOrderedBroadcast()) {
    142                     abortBroadcast();
    143                 }
    144             }
    145         }
    146     }
    147 }
    148