Seek Bar

Seek Bar : A SeekBar is an extension of ProgressBar that adds a draggable thumb. The user can touch the thumb and drag left or right to set the current progress level or use the arrow keys. Placing focusable widgets to the left or right of a SeekBar is discouraged.

Clients of the SeekBar can attach a SeekBar.OnSeekBarChangeListener to be notified of the user's actions.

SeekBar.OnSeekBarChangeListener :

A callback that notifies clients when the progress level has been changed. This includes changes that were initiated by the user through a touch gesture or arrow key/trackball as well as changes that were initiated programmatically.

Methods:

onProgressChanged(SeekBar seekBar, int progress, boolean fromUser) : Notification that the progress level has changed.

onStartTrackingTouch(SeekBar seekBar): Notification that the user has started a touch gesture.

onStopTrackingTouch(SeekBar seekBar) :Notification that the user has finished a touch gesture.

MainActivity.java : 

public class MainActivity extends Activity {

SeekBar seek;

      

       @Override

       protected void onCreate(Bundle savedInstanceState) {

              // TODO Auto-generated method stub

              super.onCreate(savedInstanceState);

              setContentView(R.layout.activity_main);

              seek = (SeekBar) findViewById(R.id.seekBar1);

              seek.setOnSeekBarChangeListener(new OnSeekBarChangeListener() {

                    

                     @Override

                     public void onStopTrackingTouch(SeekBar seek) {

                           Toast.makeText(MainActivity.this, "App is loaded", Toast.LENGTH_LONG).show();

                          

                     }

                    

                     @Override

                     public void onStartTrackingTouch(SeekBar seek) {

                           Toast.makeText(MainActivity.this, "App will be loaded soon", Toast.LENGTH_LONG).show();

                          

                     }

                    

                     @Override

                     public void onProgressChanged(SeekBar seek, int progress, boolean fromUser) {

                            Toast.makeText(MainActivity.this, "Seekbar Value : " + progress, Toast.LENGTH_SHORT).show();

                          

                     }

              });

       }

       @Override

       public boolean onCreateOptionsMenu(Menu menu) {

              // Inflate the menu; this adds items to the action bar if it is present.

              getMenuInflater().inflate(R.menu.main, menu);

              return true;

       }

}

In activity_main.xml :

<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"

    xmlns:tools="http://schemas.android.com/tools"

    android:layout_width="match_parent"

    android:layout_height="match_parent"

    android:paddingBottom="@dimen/activity_vertical_margin"

    android:paddingLeft="@dimen/activity_horizontal_margin"

    android:paddingRight="@dimen/activity_horizontal_margin"

    android:paddingTop="@dimen/activity_vertical_margin"

    tools:context=".MainActivity" >

    <SeekBar

        android:id="@+id/seekBar1"

        android:layout_width="match_parent"

        android:layout_height="wrap_content"

        android:layout_alignParentLeft="true"

        android:layout_alignParentTop="true"

        android:layout_marginTop="107dp" />

</RelativeLayout>

Now run the application.