均衡器getBandLevel(i)返回值0

Question

我循环我所有的预设，并希望在那之后使用它们。现在，我调用的第一个getBandLevel方法正在返回一个可接受的值，但循环中的所有其他方法调用都返回0。我哪里错了？

下面是我的循环代码：

m_equalizer.usePreset((short)position);
short numberFrequencyBands = .m_equalizer.getNumberOfBands();
final short lowerEqualizerBandLevel = m_equalizer.getBandLevelRange()[0];

for(short x=0;x<numberFrequencyBands;x++)
{
    SeekBar seekbar= (SeekBar)findViewById((short)x);
    seekbar.setProgress(m_equalizer.getBandLevel((short) x) - lowerEqualizerBandLevel ); //Here is getBandLevel returning me 0 after x is 1
}

编辑:我还检查了其他应用程序是否也提供了0，并且它们dont.They有正确的设置

代码：

public void equalizeSound()
{
   ArrayList<String> equalizePresetNames = new ArrayList<String>();
    ArrayAdapter<String> equalizerPresetSpinnerAdapter = new ArrayAdapter<String>(this,R.layout.custom_spinner_item_small,equalizePresetNames);
    equalizerPresetSpinnerAdapter.setDropDownViewResource(android.R.layout.simple_spinner_dropdown_item);
    Spinner equalizerPresetSpinner = (Spinner)findViewById(R.id.spinner_presets_eq);

    for(short i=0;i< m_equalizer.getNumberOfPresets();++i)
    {
        equalizePresetNames.add(m_equalizer.getPresetName(i));
    }

    equalizerPresetSpinner.setAdapter(equalizerPresetSpinnerAdapter);

    equalizerPresetSpinner.setOnItemSelectedListener(new AdapterView.OnItemSelectedListener() {
        @Override
        public void onItemSelected(AdapterView<?> parent, View view, int position, long id) {
            m_equalizer.usePreset((short)position);
            short numberFrequencyBands = m_equalizer.getNumberOfBands();
            final short lowerEqualizerBandLevel = m_equalizer.getBandLevelRange()[0];

            for(short x=0;x<numberFrequencyBands;x++)
            {
                SeekBar seekbar= (SeekBar)findViewById((short)x);
                seekbar.setProgress(m_equalizer.getBandLevel((short) x) - lowerEqualizerBandLevel );
            }
        }

        @Override
        public void onNothingSelected(AdapterView<?> parent) {

        }
    });
}

Answer 1

您的SeekBar.OnSeekBarChangeListener s的SeekBar正在更改预设值。

在for循环中设置OnSeekBarChangeListener，删除前一个循环：

SeekBar seekbar= (SeekBar)findViewById((short)x);
seekbar.setOnSeekBarChangeListener(null);
seekbar.setProgress(m_equalizer.getBandLevel((short) x) - lowerEqualizerBandLevel );
seekbar.setOnSeekBarChangeListener(yourListenerHere);