ANDROID : How to make an Activity FullScreen

Setting activity to fullscreen mode in android can be done either programmatically or via AndroidManifest.xml file.

A) Programmatically

public class FullScreenActivity extends Activity {
    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
       
        requestWindowFeature(Window.FEATURE_NO_TITLE);
        getWindow().setFlags(WindowManager.LayoutParams.FLAG_FULLSCREEN,
            WindowManager.LayoutParams.FLAG_FULLSCREEN);
        setContentView(R.layout.main);
    }
}

B) Via AndroidManifest.xml

<activity android:name=".FullScreenActivity"
    android:label="@string/app_name"
    android:theme="@android:style/Theme.NoTitleBar.Fullscreen"/>