Android Java SeekBar

SeekBar is a UI component in Android for selecting a value from a range of values. In this tutorial, we will learn how to use SeekBar in Java Android.

Creating a SeekBar

To create a SeekBar, we first need to add the following code in the XML layout file:

<SeekBar
    android:id="@+id/seek_bar"
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:max="100"
    android:progress="50"/>

We can customize the SeekBar by changing the max value, progress value, and layout_width and layout_height attributes.

After adding the SeekBar to the layout file, we need to reference it in the Java file using findViewById() method:

SeekBar seekBar = findViewById(R.id.seek_bar);

Listening to SeekBar Changes

We can listen to the SeekBar changes using setOnSeekBarChangeListener() method. We can override the methods onProgressChanged(), onStartTrackingTouch(), and onStopTrackingTouch() to listen to the SeekBar changes:

seekBar.setOnSeekBarChangeListener(new SeekBar.OnSeekBarChangeListener() {
    @Override
    public void onProgressChanged(SeekBar seekBar, int progress, boolean fromUser) {
        // Do something when the SeekBar progress is changed
    }

    @Override
    public void onStartTrackingTouch(SeekBar seekBar) {
        // Do something when user starts touching the SeekBar
    }

    @Override
    public void onStopTrackingTouch(SeekBar seekBar) {
        // Do something when user stops touching the SeekBar
    }
});

Retrieving SeekBar Value

To retrieve the current value of the SeekBar, we can use the getProgress() method:

int seekBarValue = seekBar.getProgress();

Conclusion

In this tutorial, we learned how to use SeekBar in Java Android. We learned how to create a SeekBar, listen to its changes, and retrieve its value. SeekBar is an essential component for inputting values from the user in Android applications.