Question

用于显示均衡器频段的代码

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

    final short lowerEqualizerBandLevel = mEqualizer.getBandLevelRange()[0];
    final short upperEqualizerBandLevel = mEqualizer.getBandLevelRange()[1];

        //VerticalSeekBar1

        int freq_range0 = mEqualizer.getCenterFreq((short)0);
        verticalSeekbar[0].setMax(upperEqualizerBandLevel - lowerEqualizerBandLevel);
        verticalSeekbar[0].setProgress(mEqualizer.getBandLevel((short)0));
        verticalSeekbar[0].setOnSeekBarChangeListener(new SeekBar.OnSeekBarChangeListener() {
            @Override
            public void onProgressChanged(SeekBar seekBar, int progress, boolean b) {
                mEqualizerBandLevel0 = progress;
                mEqualizer.setBandLevel((short) 0, (short) (progress + lowerEqualizerBandLevel ));
                slider_value[0].setText(String.valueOf((progress + lowerEqualizerBandLevel) / 100 + " dB"));
            }
            @Override
            public void onStartTrackingTouch(SeekBar seekBar) {
            }
            @Override
            public void onStopTrackingTouch(SeekBar seekBar) {
            }
        });
        slider_labels[0].setText(formatBandLabel(freq_range0));

verticalSeekbar [0]：是第一个均衡器频段，我有5个均衡器频段，所以verticalSeekbar [1] ...依此类推，直到[4]。

用于显示设备支持的预设的微调器的代码。

final ArrayList<String> eqPresets = new ArrayList<>();
    ArrayAdapter<String> eqPresetsAdapter = new ArrayAdapter<>(this,R.layout.spinner_item, eqPresets);
    eqPresetsAdapter.setDropDownViewResource(R.layout.spin_item);
    Spinner eqSpinner   =   findViewById(R.id.mPresetsSpinner);
    for (short i = 0; i < mEqualizer.getNumberOfPresets(); i++){
        eqPresets.add(mEqualizer.getPresetName(i));
    }
    eqSpinner.setAdapter(eqPresetsAdapter);

现在我要实现的是创建一个自定义预设，以便保存每个均衡器频段的频段级别。

customPreset = new CustomPreset();
customPreset.setPresetName(input.getText().toString());
customPreset.setmEqualizerBandLevel0(mEqualizerBandLevel0);
customPreset.setmEqualizerBandLevel1(mEqualizerBandLevel1);
customPreset.setmEqualizerBandLevel2(mEqualizerBandLevel2);
customPreset.setmEqualizerBandLevel3(mEqualizerBandLevel3);
customPreset.setmEqualizerBandLevel4(mEqualizerBandLevel4);
customPresets.add(customPreset);

我尝试通过保存所有搜索栏的进度值，然后使用

设置新的频段级别来进行尝试

mEqualizer.setBandLevel((short) 0, (short) (customPresets.get(position).getmEqualizerBandLevel0() + lowerEqualizerBandLevel ));

选择了自定义预设后，但我不知道如何在 Preset Spinner 中显示这些自定义预设，因为微调器的数组列表具有类型字符串，我也无法为字符串添加数组列表对象。

如何为均衡器创建自定义预设？

0 个答案: