Android Studio 中的搜索栏

Question

I came across a piece of code,now I am stuck with it.

        SeekBar volumeControl=(SeekBar)findViewById(R.id.volumeSeekBar);
        volumeControl.setOnSeekBarChangeListener(new SeekBar.OnSeekBarChangeListener() {
            @Override
            public void onProgressChanged(SeekBar seekBar, int progress, boolean fromUser) {
                audioManager.setStreamVolume(AudioManager.STREAM_MUSIC,progress,0 );


            }

            @Override
            public void onStartTrackingTouch(SeekBar seekBar) {

            }

            @Override
            public void onStopTrackingTouch(SeekBar seekBar) {

            }
        });

Here I know that volumeControl is a variable of type SeekBar. In the second line of code volume control is set with a function setOnSeekBarChangeListener . I am unable to understand what's written inside the brackets of setOnSeekBarChangeListener . Can anyone please explain it in detail. I am just introduced to java and don't have much knowledge

Answer 1

This is a small piece of code to control volume using a seek bar. Inside the brackets of onSeekBarChangeListener , we declare a new SeekBar.onSeekBarChangeListener which implements three methods :

1. onProgressChanged : This basically tracks the change in the seek bar and then sets the volume according to the amount of change.

2. onStartTrackingTouch : This methods contains the code which should be executed when the touch gesture starts.

3. onStopTrackingTouch : This method contains the code which should be executed which the touch gesture stops.