我有一個奇怪的問題。我在MediaPlayer
中使用prepareAsync方法,但我聲明的偵聽器永遠不會被解僱。我嘗試從互聯網(廣播電臺)流式傳輸實況.mp3
。我爲偵聽器使用了一種內聯方法,但我也試圖在沒有任何成功的情況下實現該接口。下面是我的代碼的一部分:AndroId MediaPlayer prepareAsync方法
在構件部分:
String url = "http://<my_url>.mp3";
MediaPlayer mediaPlayer = new MediaPlayer();
在活動onCreate()
:
ToggleButton playButton = (ToggleButton) findViewById(R.id.playToggleButton);
playButton.setOnClickListener(this);
playButton.clearFocus();
playButton.setClickable(false);
mediaPlayer.setOnPreparedListener(new OnPreparedListener() {
public void onPrepared(MediaPlayer mp) {
ToggleButton playButton = (ToggleButton) findViewById(R.id.playToggleButton);
playButton.setClickable(true);
mp.start();
}
});
preparePlayer();
然後,這裏的preparePlayer()
方法:
private void preparePlayer() {
if (mediaPlayer == null) {
mediaPlayer = new MediaPlayer();
}
mediaPlayer.setAudioStreamType(AudioManager.STREAM_MUSIC);
try {
mediaPlayer.setDataSource(url);
mediaPlayer.prepareAsync();
} catch (IllegalArgumentException e) {
Toast.makeText(
MyStreamActivity.this,
getResources().getString(R.string.erreurIllegalArgument),
Toast.LENGTH_LONG).show();
e.printStackTrace();
} catch (IllegalStateException e) {
Toast.makeText(
MyStreamActivity.this,
getResources().getString(R.string.erreurIllegalState),
Toast.LENGTH_LONG).show();
e.printStackTrace();
} catch (IOException e) {
Toast.makeText(
MyStreamActivity.this,
getResources().getString(R.string.erreurIO),
Toast.LENGTH_LONG).show();
e.printStackTrace();
}
}
和(只是備案)時,onDetroy()
在那裏我做清潔:
private void releaseMediaPlayer() {
if (mediaPlayer != null) {
if(mediaPlayer.isPlaying()) {
mediaPlayer.stop();
}
mediaPlayer.release();
mediaPlayer = null;
}
}
@Override
protected void onDestroy() {
super.onDestroy();
releaseMediaPlayer();
}
做日誌說什麼發生或有什麼錯誤?你有互聯網許可嗎? – zapl 2012-04-24 22:57:22