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      1 /*
      2  * Copyright (C) 2012 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.deskclock;
     18 
     19 import android.app.Service;
     20 import android.content.Context;
     21 import android.content.Intent;
     22 import android.content.res.AssetFileDescriptor;
     23 import android.content.res.Resources;
     24 import android.media.AudioManager;
     25 import android.media.MediaPlayer;
     26 import android.media.MediaPlayer.OnErrorListener;
     27 import android.os.IBinder;
     28 import android.telephony.PhoneStateListener;
     29 import android.telephony.TelephonyManager;
     30 
     31 /**
     32  * Play the timer's ringtone. Will continue playing the same alarm until service is stopped.
     33  */
     34 public class TimerRingService extends Service implements AudioManager.OnAudioFocusChangeListener {
     35 
     36     private boolean mPlaying = false;
     37     private MediaPlayer mMediaPlayer;
     38     private TelephonyManager mTelephonyManager;
     39     private int mInitialCallState;
     40 
     41 
     42     private final PhoneStateListener mPhoneStateListener = new PhoneStateListener() {
     43         @Override
     44         public void onCallStateChanged(int state, String ignored) {
     45             // The user might already be in a call when the alarm fires. When
     46             // we register onCallStateChanged, we get the initial in-call state
     47             // which kills the alarm. Check against the initial call state so
     48             // we don't kill the alarm during a call.
     49             if (state != TelephonyManager.CALL_STATE_IDLE
     50                     && state != mInitialCallState) {
     51                 stopSelf();
     52             }
     53         }
     54     };
     55 
     56     @Override
     57     public void onCreate() {
     58         // Listen for incoming calls to kill the alarm.
     59         mTelephonyManager =
     60                 (TelephonyManager) getSystemService(Context.TELEPHONY_SERVICE);
     61         mTelephonyManager.listen(
     62                 mPhoneStateListener, PhoneStateListener.LISTEN_CALL_STATE);
     63         AlarmAlertWakeLock.acquireScreenCpuWakeLock(this);
     64     }
     65 
     66     @Override
     67     public void onDestroy() {
     68         stop();
     69         // Stop listening for incoming calls.
     70         mTelephonyManager.listen(mPhoneStateListener, 0);
     71         AlarmAlertWakeLock.releaseCpuLock();
     72     }
     73 
     74     @Override
     75     public IBinder onBind(Intent intent) {
     76         return null;
     77     }
     78 
     79     @Override
     80     public int onStartCommand(Intent intent, int flags, int startId) {
     81         // No intent, tell the system not to restart us.
     82         if (intent == null) {
     83             stopSelf();
     84             return START_NOT_STICKY;
     85         }
     86 
     87         play();
     88         // Record the initial call state here so that the new alarm has the newest state.
     89         mInitialCallState = mTelephonyManager.getCallState();
     90 
     91         return START_STICKY;
     92     }
     93 
     94     // Volume suggested by media team for in-call alarms.
     95     private static final float IN_CALL_VOLUME = 0.125f;
     96 
     97     private void play() {
     98 
     99         if (mPlaying) {
    100             return;
    101         }
    102 
    103         LogUtils.v("TimerRingService.play()");
    104 
    105         // TODO: Reuse mMediaPlayer instead of creating a new one and/or use
    106         // RingtoneManager.
    107         mMediaPlayer = new MediaPlayer();
    108         mMediaPlayer.setOnErrorListener(new OnErrorListener() {
    109             @Override
    110             public boolean onError(MediaPlayer mp, int what, int extra) {
    111                 LogUtils.e("Error occurred while playing audio.");
    112                 mp.stop();
    113                 mp.release();
    114                 mMediaPlayer = null;
    115                 return true;
    116             }
    117         });
    118 
    119         try {
    120             // Check if we are in a call. If we are, use the in-call alarm
    121             // resource at a low volume to not disrupt the call.
    122             if (mTelephonyManager.getCallState()
    123                     != TelephonyManager.CALL_STATE_IDLE) {
    124                 LogUtils.v("Using the in-call alarm");
    125                 mMediaPlayer.setVolume(IN_CALL_VOLUME, IN_CALL_VOLUME);
    126                 setDataSourceFromResource(getResources(), mMediaPlayer,
    127                         R.raw.in_call_alarm);
    128             } else {
    129                 AssetFileDescriptor afd = getAssets().openFd("sounds/Timer_Expire.ogg");
    130                 mMediaPlayer.setDataSource(
    131                         afd.getFileDescriptor(), afd.getStartOffset(), afd.getLength());
    132             }
    133             startAlarm(mMediaPlayer);
    134         } catch (Exception ex) {
    135             LogUtils.v("Using the fallback ringtone");
    136             // The alert may be on the sd card which could be busy right
    137             // now. Use the fallback ringtone.
    138             try {
    139                 // Must reset the media player to clear the error state.
    140                 mMediaPlayer.reset();
    141                 setDataSourceFromResource(getResources(), mMediaPlayer,
    142                         R.raw.fallbackring);
    143                 startAlarm(mMediaPlayer);
    144             } catch (Exception ex2) {
    145                 // At this point we just don't play anything.
    146                 LogUtils.e("Failed to play fallback ringtone", ex2);
    147             }
    148         }
    149 
    150         mPlaying = true;
    151     }
    152 
    153     // Do the common stuff when starting the alarm.
    154     private void startAlarm(MediaPlayer player)
    155             throws java.io.IOException, IllegalArgumentException,
    156                    IllegalStateException {
    157         final AudioManager audioManager = (AudioManager)getSystemService(Context.AUDIO_SERVICE);
    158         // do not play alarms if stream volume is 0
    159         // (typically because ringer mode is silent).
    160         if (audioManager.getStreamVolume(AudioManager.STREAM_ALARM) != 0) {
    161             player.setAudioStreamType(AudioManager.STREAM_ALARM);
    162             player.setLooping(true);
    163             player.prepare();
    164             audioManager.requestAudioFocus(
    165                     this, AudioManager.STREAM_ALARM, AudioManager.AUDIOFOCUS_GAIN_TRANSIENT);
    166             player.start();
    167         }
    168     }
    169 
    170     private void setDataSourceFromResource(Resources resources,
    171             MediaPlayer player, int res) throws java.io.IOException {
    172         AssetFileDescriptor afd = resources.openRawResourceFd(res);
    173         if (afd != null) {
    174             player.setDataSource(afd.getFileDescriptor(), afd.getStartOffset(),
    175                     afd.getLength());
    176             afd.close();
    177         }
    178     }
    179 
    180     /**
    181      * Stops timer audio
    182      */
    183     public void stop() {
    184         LogUtils.v("TimerRingService.stop()");
    185         if (mPlaying) {
    186             mPlaying = false;
    187 
    188             // Stop audio playing
    189             if (mMediaPlayer != null) {
    190                 mMediaPlayer.stop();
    191                 final AudioManager audioManager =
    192                         (AudioManager)getSystemService(Context.AUDIO_SERVICE);
    193                 audioManager.abandonAudioFocus(this);
    194                 mMediaPlayer.release();
    195                 mMediaPlayer = null;
    196             }
    197         }
    198     }
    199 
    200 
    201     @Override
    202     public void onAudioFocusChange(int focusChange) {
    203         // Do nothing
    204     }
    205 }
    206