我正在开发流媒体广播应用程序。一切正常，除了改变均衡器效果不会影响声音。

调用usePreset(preset)改变均衡器效果不会对音效做任何改变。

虽然没有报错，为什么usePreset没有改变音效。

我已经在带有 4.0.3 的 samsung galaxy sII 中进行了测试。

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());
        }
    }

感谢您帮助确定问题。

编辑 这个问题还没有解决。我没有找到任何解释均衡器预设用法的示例代码。

任何对使用 Preset welcome 的代码示例的引用。

最佳答案

this is a fully source code for equalizer,希望对你有帮助

关于Android - 均衡器 usePreset 不工作(音效无变化)，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/16476156/