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
17package com.android.music;
18
19import android.content.BroadcastReceiver;
20import android.content.Context;
21import android.content.Intent;
22import android.media.AudioManager;
23import android.os.Handler;
24import android.os.Message;
25import android.view.KeyEvent;
26
27/**
28 *
29 */
30public 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