SeekBar in Android

In this tutorial, we will learn how to use SeekBar in Android. The Seekbar is a child class of AbsSeekBar class. Seekbar is kind of progress bar and Seekbar allow users to move thumb of Seekbar from left or right. For example, in media players, you can move the song forward or backwards by moving a Seekbar. Here we will learn how to add SeekBar in the XML layout file and how to get change listener of SeekBar in android Java file.

XML Code:

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:padding="16dp"
    android:orientation="vertical"
    android:gravity="center"
    tools:context=".MainActivity">

    <TextView
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="0"
        android:layout_marginBottom="15dp"
        android:id="@+id/textView"
        android:textSize="18sp"/>

   <SeekBar
       android:layout_width="match_parent"
       android:layout_height="wrap_content"
       android:id="@+id/seekBar"/>

</LinearLayout>

Output:

After creating this XML layout file we will move to our Java file In this file we will use seekbar change listener to track the change in seekbar.

Java Code:

public class MainActivity extends AppCompatActivity {

    SeekBar seekBar;
    TextView textView;
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        seekBar=(SeekBar)findViewById(R.id.seekBar);
        textView=(TextView)findViewById(R.id.textView);

        textView.setTextColor(Color.BLACK);

        seekBar.setOnSeekBarChangeListener(new SeekBar.OnSeekBarChangeListener() {
            @Override
            public void onProgressChanged(SeekBar seekBar, int progress, boolean fromUser) {
                textView.setText(progress+"");
            }

            @Override
            public void onStartTrackingTouch(SeekBar seekBar) {
                textView.setTextColor(Color.GREEN);
            }

            @Override
            public void onStopTrackingTouch(SeekBar seekBar) {
                textView.setTextColor(Color.BLACK);
            }
        });

    }
}