Android - Barra de titulo

protected void onCreate(Bundle savedInstanceState) {

	super.onCreate(savedInstanceState);

	requestWindowFeature(Window.FEATURE_NO_TITLE);

	setContentView(R.layout.panel_imagen);

public class Panel_imagen extends ActionBarActivity{{

protected void onCreate(Bundle savedInstanceState) {

	super.onCreate(savedInstanceState);

	requestWindowFeature(Window.FEATURE_NO_TITLE);

	setContentView(R.layout.panel_imagen);

// No funciona

}

public class Panel_imagen extends Activity{

protected void onCreate(Bundle savedInstanceState) {

	super.onCreate(savedInstanceState);

	requestWindowFeature(Window.FEATURE_NO_TITLE);

	setContentView(R.layout.panel_imagen);

// Funciona

}

}

}