我正在使用以下代码来播放声音。在 ICS 之前一切正常。但在 ICS 和更高版本上听不到声音。没有错误，但是听不到声音。
编辑:请注意，以下代码由广播接收器触发。 BroadCast 接收器调用异步任务。在异步任务的后处理方法中，调用了以下方法。
可能是什么错误？
public static void playSound(final Context context, final int volume,
Uri uri, final int stream, int maxTime, int tickTime) {
//stopPlaying();
/*
if (stream < 0 || stream > 100) {
throw new IllegalArgumentException(
"volume must be between 0 and 100 .Current volume "
+ volume);
}*/
final AudioManager mAudioManager = (AudioManager) context
.getSystemService(Context.AUDIO_SERVICE);
int deviceLocalVolume = getDeviceVolume(volume,
mAudioManager.getStreamMaxVolume(stream));
Log.d(TAG,
"device max volume = "
+ mAudioManager.getStreamMaxVolume(stream)
+ " for streamType " + stream);
Log.d(TAG, "playing sound " + uri.toString()
+ " with device local volume " + deviceLocalVolume);
final int oldVolume = mAudioManager.getStreamVolume(stream);
// set the volume to what we want it to be. In this case it's max volume
// for the alarm stream.
Log.d(Constants.APP_TAG, "setting device local volume to " + deviceLocalVolume);
mAudioManager.setStreamVolume(stream, deviceLocalVolume,
AudioManager.FLAG_REMOVE_SOUND_AND_VIBRATE);
final MediaPlayer mediaPlayer = new MediaPlayer();
golbalMMediaPlayer = mediaPlayer;
try {
final OnPreparedListener OnPreparedListener = new OnPreparedListener() {
@Override
public void onPrepared(final MediaPlayer mp) {
Log.d(TAG, "onMediaPlayercompletion listener");
mp.start();
countDownTimer.start();
}
};
mediaPlayer.setDataSource(context.getApplicationContext(), uri);
mediaPlayer.setAudioStreamType(stream);
mediaPlayer.setLooping(false);
mediaPlayer.setOnPreparedListener(OnPreparedListener);
mediaPlayer.setOnCompletionListener(new OnCompletionListener() {
@Override
public void onCompletion(MediaPlayer mp) {
Log.d(Constants.APP_TAG, "Entered onCompletion listener of mediaplayer");
mAudioManager.setStreamVolume(stream, oldVolume,
AudioManager.FLAG_REMOVE_SOUND_AND_VIBRATE);
try{
if(mediaPlayer != null && mediaPlayer.isPlaying()){
mediaPlayer.release();
}
}catch(Exception ex){
Log.e(Constants.APP_TAG, "error on oncompletion listener" ,ex);
}
}
});
CountDownTimer timer = new CountDownTimer(maxTime*1000, tickTime*1000) {
@Override
public void onTick(long millisUntilFinished) {
Log.d(TAG, "tick while playing sound ");
}
@Override
public void onFinish() {
Log.d(TAG, "timer finished");
stopPlaying();
}
};
countDownTimer = timer;
mediaPlayer.prepareAsync();
} catch (Exception e) {
Log.e(TAG, "problem while playing sound", e);
} finally {
}
}
日志:
:07-01 00:00:00.030: D/beephourly(9500): device max volume = 7 for streamType 5
07-01 00:00:00.030: D/beephourly(9500): playing sound content://media/internal/audio/media/166 with device local volume 7
07-01 00:00:00.030: D/beephourly(9500): setting device local volume to 7
07-01 00:00:00.080: D/beephourly(9500): vibrating with pattern = [J@428bae20
07-01 00:00:00.090: D/beephourly(9500): will show normal notification
07-01 00:00:00.100: D/beephourly(9500): notification is enabled
07-01 00:00:00.100: D/usersettings(9500): hr = 0
07-01 00:00:00.110: D/beephourly(9500): onMediaPlayercompletion listener
07-01 00:00:00.451: D/beephourly(9500): tick while playing sound
07-01 00:00:20.460: D/beephourly(9500): timer finished
07-01 00:00:20.460: D/beephourly(9500): got request to stop playing
07-01 00:00:20.460: D/beephourly(9500): cancelling countdowntimer
07-01 00:00:20.460: D/beephourly(9500): releasing mediaplayer now
最佳答案
试试这个:
播放声音
public class PlaySound extends Activity implements OnTouchListener {
private SoundPool soundPool;
private int soundID;
boolean loaded = false;
/** Called when the activity is first created. */
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
View view = findViewById(R.id.textView1);
view.setOnTouchListener(this);
// Set the hardware buttons to control the music
this.setVolumeControlStream(AudioManager.STREAM_MUSIC);
// Load the sound
soundPool = new SoundPool(10, AudioManager.STREAM_MUSIC, 0);
soundPool.setOnLoadCompleteListener(new OnLoadCompleteListener() {
@Override
public void onLoadComplete(SoundPool soundPool, int sampleId,
int status) {
loaded = true;
}
});
soundID = soundPool.load(this, R.raw.sound1, 1);
}
@Override
public boolean onTouch(View v, MotionEvent event) {
if (event.getAction() == MotionEvent.ACTION_DOWN) {
// Getting the user sound settings
AudioManager audioManager = (AudioManager) getSystemService(AUDIO_SERVICE);
float actualVolume = (float) audioManager
.getStreamVolume(AudioManager.STREAM_MUSIC);
float maxVolume = (float) audioManager
.getStreamMaxVolume(AudioManager.STREAM_MUSIC);
float volume = actualVolume / maxVolume;
// Is the sound loaded already?
if (loaded) {
soundPool.play(soundID, volume, volume, 1, 0, 1f);
Log.e("Test", "Played sound");
}
}
return false;
}
}
布局文件:
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical" >
<TextView
android:id="@+id/textView1"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:text="Click on the screen to start playing" >
</TextView>
</LinearLayout>
来源链接:http://www.vogella.com/tutorials/AndroidMedia/article.html#sound
关于java - 声音不在 android > Ice Cream Sandwich 中播放，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/24496671/