Question

我的均衡器活动班级

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


    verticalSeekbar[0]    =   findViewById(R.id.verticalSeekbar1);
    slider_labels[0]      =   findViewById(R.id.tvFreq1);
    slider_value[0]       =   findViewById(R.id.value1);
    verticalSeekbar[1]    =   findViewById(R.id.verticalSeekbar2);
    slider_labels[1]      =   findViewById(R.id.tvFreq2);
    slider_value[1]       =   findViewById(R.id.value2);
    verticalSeekbar[2]    =   findViewById(R.id.verticalSeekbar3);
    slider_labels[2]      =   findViewById(R.id.tvFreq3);
    slider_value[2]       =   findViewById(R.id.value3);
    verticalSeekbar[3]    =   findViewById(R.id.verticalSeekbar4);
    slider_labels[3]      =   findViewById(R.id.tvFreq4);
    slider_value[3]       =   findViewById(R.id.value4);
    verticalSeekbar[4]    =   findViewById(R.id.verticalSeekbar5);
    slider_labels[4]      =   findViewById(R.id.tvFreq5);
    slider_value[4]       =   findViewById(R.id.value5);


    mEqualizer = new Equalizer(0, mediaPlayer.getAudioSessionId());
    setupEqualizer();
    mEqualizer.setEnabled(true);


    for (short i = 0; i < 5; i++){
        final short equalizerBandIndex = i;

        int freq_range = mEqualizer.getCenterFreq(equalizerBandIndex);

        verticalSeekbar[i].setMax(upperEqualizerBandLevel - lowerEqualizerBandLevel);
        verticalSeekbar[i].setProgress(mEqualizer.getBandLevel(equalizerBandIndex));

        verticalSeekbar[i].setOnSeekBarChangeListener(new SeekBar.OnSeekBarChangeListener() {
            @Override
            public void onProgressChanged(SeekBar seekBar, int progress, boolean b) {
                mEqualizer.setBandLevel(equalizerBandIndex, (short) (progress + lowerEqualizerBandLevel ));
                slider_value[equalizerBandIndex].setText(String.valueOf((progress + lowerEqualizerBandLevel) / 100) + " dB");
            }

            @Override
            public void onStartTrackingTouch(SeekBar seekBar) {

            }

            @Override
            public void onStopTrackingTouch(SeekBar seekBar) {

            }
        });
        slider_labels[i].setText(formatBandLabel(freq_range));

        float scale2 = getResources().getDisplayMetrics().density;
        int dpAsPixels2 = (int) (8*scale2 + 0.5f);


        setupEqSpinner();

    }

}

在for循环中，我将频带数限制为5，因为我只想显示5个频带，所以它与我的xml设计相匹配。

但是我的问题是当我使用时：

Log.i(TAG, "Number of bands: " + mEqualizer.getNumberOfBands());

它返回数字5，所以我的设备支持 5个均衡器频段，对吗？

但是我还有另一个mediaplayer应用程序，它显示7个频段，频率不是 60Hz，230Hz，910Hz，3kHz，14kHz ，而是 50Hz，130Hz，320Hz，800Hz，2kHz，5kHz和12.5kHz。

那么即使均衡器仅支持 5个频段，应用程序也可能显示 7个频段？

谢谢

其他mp3播放器上的Android均衡器频段不同

0 个答案: