javaandroidequalizer

How to make a layout for the equalizer?


This is my code i use to setup a 5 band Equalizer, but i would like to have a Layout which supports the number of equalizer bands supported by the device.

For now i have hardcoded the size of Equalizer bands because i'm not sure how to create a Layout for a non constant value of equalizer bands.

This is the code i would like to use:

equalizer.getNumberOfBands(); //it tells you the number of equalizer in device.

But what if a device supports +10 equalizer bands, how can i fit those bands on the screen?

Code for creating Equalizer

private void setupEqualizer(){

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

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

    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();
}

Solution

  • You need to use Vertical SeekBar as told by Nilesh

    equalizer.getNumberOfBands() // it tells the number of equalizer ..
    

    Create a LinearLayout(Horizontal) and add Vertical Seekbar to it in a for loop (numberOfBands)..