我正在處理流式無線電應用程序。一切工作正常,除了改變均衡器效果不會影響聲音。Android - 均衡器usePreset不工作(音效無變化)
通過調用usePreset(預設)更改均衡器效果不會對聲音效果進行任何更改。
即使沒有錯誤,爲什麼usePreset不會更改聲音效果。
我用4.0.3在samsung galaxy sII中測試過。
public void startPlayer() {
//
// Check whether we can acquire the audio focus
// to start the player
//
if (!requestAudioFocus()) {
return;
}
if (null != mAudioPlayer) {
if (mAudioPlayer.isPlaying()) {
mAudioPlayer.stop();
}
mAudioPlayer.reset();
} else {
mAudioPlayer = new MediaPlayer();
mAudioPlayer.reset();
}
try {
notifyProgressUpdate(PLAYER_INITIALIZING);
try {
mEqualizer = new Equalizer(0, mAudioPlayer.getAudioSessionId());
mEqualizer.setEnabled(true);
Log.d(TAG,
"Audio Session ID " + mAudioPlayer.getAudioSessionId()
+ "Equalizer " + mEqualizer + " Preset "
+ mEqualizer.getCurrentPreset());
} catch (Exception ex) {
mEqualizer = null;
}
mAudioPlayer.setAudioStreamType(AudioManager.STREAM_MUSIC);
mAudioPlayer.setDataSource(mCurrentTrack.getStreamURL());
//
// Add the Listener to track the player status
//
mAudioPlayer.setOnCompletionListener(this);
mAudioPlayer.setOnBufferingUpdateListener(this);
mAudioPlayer.setOnPreparedListener(this);
mAudioPlayer.setOnInfoListener(this);
mAudioPlayer.setOnErrorListener(this);
notifyProgressUpdate(PLAYER_BUFFERING);
mAudioPlayer.prepareAsync();
} catch (IllegalArgumentException e) {
e.printStackTrace();
} catch (SecurityException e) {
e.printStackTrace();
} catch (IllegalStateException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
}
}
//Get the available presets from the equalizer
public String[] getEqualizerPresets() {
String[] presets = null;
short noOfPresets = -1;
if (null != mEqualizer) {
noOfPresets = mEqualizer.getNumberOfPresets();
presets = new String[noOfPresets];
for (short index = 0; index < noOfPresets; index++) {
presets[index] = mEqualizer.getPresetName(index);
}
}
return presets;
}
//Set the user preferred presets
public void setEqualizerPreset(int position) {
if (null != mEqualizer) {
Log.d(TAG, "setting equlizer effects " + position);
Log.d(TAG, "Equalizer " + mEqualizer + " set Preset " + position);
mEqualizer.usePreset((short)position);
Log.d(TAG, "Equalizer " + mEqualizer + " current Preset "
+ mEqualizer.getCurrentPreset());
}
}
感謝您的幫助以發現問題。
編輯 此問題尚未解決。我沒有找到解釋均衡器預設使用的示例代碼。
對使用預設歡迎的代碼示例的任何引用。
你解決這個問題? – Wayne 2013-07-02 04:38:58
你能爲我提供一些教程嗎? – 2013-08-19 10:39:46