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我不知道我能做些什么来解决这些问题。我正在实现一个 MediaPlayer + Equalizer 应用程序。我的 MediaPlayer 工作正常,但是,我的均衡器有问题:它的某些方法不起作用。

public class MainActivity extends Activity {

    private MediaPlayer mediaPlayer;
    private Equalizer equalizer;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);

        mediaPlayer = new MediaPlayer();
        try {
            mediaPlayer.setDataSource("/sdcard/titanium.mp3");
            mediaPlayer.prepare();
        } catch (IllegalArgumentException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        } catch (SecurityException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        } catch (IllegalStateException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        } catch (IOException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        }
        mediaPlayer.start();

        equalizer = new Equalizer(0, 0);
        equalizer.setEnabled(true);

        int minEQLevel = equalizer.getBandLevelRange()[0];
        int maxEQLevel = equalizer.getBandLevelRange()[1];

        Log.i("kkk", "Valor de minEQLevel" + minEQLevel);
        Log.i("kkk", "Valor de maxEQLevel" + maxEQLevel);

        short numberOfBand = equalizer.getNumberOfBands();
        Log.i("kkk", "Número de bandas = "+numberOfBand);

            /******From here to down the methods don't work *****/

        try {
                    short band = equalizer.getBand(Integer.valueOf(50000));
            Log.i("kkk", "getBand() = "+band);
            short band = 0;
            //int menor = equalizer.getBandFreqRange(band)[0];
            //int maior = equalizer.getBandFreqRange(band)[1];
            //Log.i("kkk", "Menor = "+menor);
            //Log.i("kkk", "Maior = "+maior);
        } catch (IllegalArgumentException e) {
            Log.i("kkk", "Bad parameter value");
        } catch (UnsupportedOperationException e) {
            Log.i("kkk", "get parameter() rejected");
        } catch (IllegalStateException e) {
            Log.i("kkk", "get parameter() called in wrong state");
        }


    }

}

以下方法正常工作: getBandLevelRange(); getNumberOfBands();

以下方法不起作用。我收到消息错误:参数值错误。获取带();getBandFreqRange(); 最后一个被评论,但当它不是也不起作用时。

在 getBand() 方法中,我已经尝试了几个参数值,例如:50000、1000000。AudioFx 库示例中支持的频率。

为什么这些方法不起作用???我原谅设置什么了吗???

tks。

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