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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.media.RingtoneManager;
     28 import android.net.Uri;
     29 import android.os.IBinder;
     30 import android.telephony.PhoneStateListener;
     31 import android.telephony.TelephonyManager;
     32 
     33 /**
     34  * Play the timer's ringtone. Will continue playing the same alarm until service is stopped.
     35  */
     36 public class TimerRingService extends Service implements AudioManager.OnAudioFocusChangeListener {
     37 
     38     private boolean mPlaying = false;
     39     private MediaPlayer mMediaPlayer;
     40     private TelephonyManager mTelephonyManager;
     41     private int mInitialCallState;
     42 
     43 
     44     private final PhoneStateListener mPhoneStateListener = new PhoneStateListener() {
     45         @Override
     46         public void onCallStateChanged(int state, String ignored) {
     47             // The user might already be in a call when the alarm fires. When
     48             // we register onCallStateChanged, we get the initial in-call state
     49             // which kills the alarm. Check against the initial call state so
     50             // we don't kill the alarm during a call.
     51             if (state != TelephonyManager.CALL_STATE_IDLE
     52                     && state != mInitialCallState) {
     53                 stopSelf();
     54             }
     55         }
     56     };
     57 
     58     @Override
     59     public void onCreate() {
     60         // Listen for incoming calls to kill the alarm.
     61         mTelephonyManager =
     62                 (TelephonyManager) getSystemService(Context.TELEPHONY_SERVICE);
     63         mTelephonyManager.listen(
     64                 mPhoneStateListener, PhoneStateListener.LISTEN_CALL_STATE);
     65         AlarmAlertWakeLock.acquireScreenCpuWakeLock(this);
     66     }
     67 
     68     @Override
     69     public void onDestroy() {
     70         stop();
     71         // Stop listening for incoming calls.
     72         mTelephonyManager.listen(mPhoneStateListener, 0);
     73         AlarmAlertWakeLock.releaseCpuLock();
     74     }
     75 
     76     @Override
     77     public IBinder onBind(Intent intent) {
     78         return null;
     79     }
     80 
     81     @Override
     82     public int onStartCommand(Intent intent, int flags, int startId) {
     83         // No intent, tell the system not to restart us.
     84         if (intent == null) {
     85             stopSelf();
     86             return START_NOT_STICKY;
     87         }
     88 
     89         play();
     90         // Record the initial call state here so that the new alarm has the
     91         // newest state.
     92         mInitialCallState = mTelephonyManager.getCallState();
     93 
     94         return START_STICKY;
     95     }
     96 
     97     // Volume suggested by media team for in-call alarms.
     98     private static final float IN_CALL_VOLUME = 0.125f;
     99 
    100     private void play() {
    101 
    102         if (mPlaying) {
    103             return;
    104         }
    105 
    106         if (Log.LOGV) {
    107             Log.v("TimerRingService.play()");
    108         }
    109 
    110         // TODO: Reuse mMediaPlayer instead of creating a new one and/or use
    111         // RingtoneManager.
    112         mMediaPlayer = new MediaPlayer();
    113         mMediaPlayer.setOnErrorListener(new OnErrorListener() {
    114             @Override
    115             public boolean onError(MediaPlayer mp, int what, int extra) {
    116                 Log.e("Error occurred while playing audio.");
    117                 mp.stop();
    118                 mp.release();
    119                 mMediaPlayer = null;
    120                 return true;
    121             }
    122         });
    123 
    124         try {
    125             // Check if we are in a call. If we are, use the in-call alarm
    126             // resource at a low volume to not disrupt the call.
    127             if (mTelephonyManager.getCallState()
    128                     != TelephonyManager.CALL_STATE_IDLE) {
    129                 Log.v("Using the in-call alarm");
    130                 mMediaPlayer.setVolume(IN_CALL_VOLUME, IN_CALL_VOLUME);
    131                 setDataSourceFromResource(getResources(), mMediaPlayer,
    132                         R.raw.in_call_alarm);
    133             } else {
    134                 AssetFileDescriptor afd = getAssets().openFd("sounds/Timer_Expire.ogg");
    135                 mMediaPlayer.setDataSource(
    136                         afd.getFileDescriptor(), afd.getStartOffset(), afd.getLength());
    137             }
    138             startAlarm(mMediaPlayer);
    139         } catch (Exception ex) {
    140             Log.v("Using the fallback ringtone");
    141             // The alert may be on the sd card which could be busy right
    142             // now. Use the fallback ringtone.
    143             try {
    144                 // Must reset the media player to clear the error state.
    145                 mMediaPlayer.reset();
    146                 setDataSourceFromResource(getResources(), mMediaPlayer,
    147                         R.raw.fallbackring);
    148                 startAlarm(mMediaPlayer);
    149             } catch (Exception ex2) {
    150                 // At this point we just don't play anything.
    151                 Log.e("Failed to play fallback ringtone", ex2);
    152             }
    153         }
    154 
    155         mPlaying = true;
    156     }
    157 
    158     // Do the common stuff when starting the alarm.
    159     private void startAlarm(MediaPlayer player)
    160             throws java.io.IOException, IllegalArgumentException,
    161                    IllegalStateException {
    162         final AudioManager audioManager = (AudioManager)getSystemService(Context.AUDIO_SERVICE);
    163         // do not play alarms if stream volume is 0
    164         // (typically because ringer mode is silent).
    165         if (audioManager.getStreamVolume(AudioManager.STREAM_ALARM) != 0) {
    166             player.setAudioStreamType(AudioManager.STREAM_ALARM);
    167             player.setLooping(true);
    168             player.prepare();
    169             audioManager.requestAudioFocus(
    170                     this, AudioManager.STREAM_ALARM, AudioManager.AUDIOFOCUS_GAIN_TRANSIENT);
    171             player.start();
    172         }
    173     }
    174 
    175     private void setDataSourceFromResource(Resources resources,
    176             MediaPlayer player, int res) throws java.io.IOException {
    177         AssetFileDescriptor afd = resources.openRawResourceFd(res);
    178         if (afd != null) {
    179             player.setDataSource(afd.getFileDescriptor(), afd.getStartOffset(),
    180                     afd.getLength());
    181             afd.close();
    182         }
    183     }
    184 
    185     /**
    186      * Stops timer audio
    187      */
    188     public void stop() {
    189         if (Log.LOGV) Log.v("TimerRingService.stop()");
    190         if (mPlaying) {
    191             mPlaying = false;
    192 
    193             // Stop audio playing
    194             if (mMediaPlayer != null) {
    195                 mMediaPlayer.stop();
    196                 final AudioManager audioManager =
    197                         (AudioManager)getSystemService(Context.AUDIO_SERVICE);
    198                 audioManager.abandonAudioFocus(this);
    199                 mMediaPlayer.release();
    200                 mMediaPlayer = null;
    201             }
    202         }
    203     }
    204 
    205 
    206     @Override
    207     public void onAudioFocusChange(int focusChange) {
    208         // Do nothing
    209     }
    210 }
    211