ChangeImageWhenButtonClick

public class Sample extends MainScreen
{
	private Bitmap bitmap,bitmapHover;
	private BitmapField bitmapField;
	private boolean isClick=false;
	public Sample()
	{
		createGUI();
	}

	private void createGUI()
	{
		bitmap=Bitmap.getBitmapResource("btn_news.png");
		bitmapHover=Bitmap.getBitmapResource("btn_news_h.png");

		bitmapField=new BitmapField(bitmap,Field.FIELD_HCENTER|Field.FOCUSABLE)
		{
			protected boolean navigationClick(int status, int time)
			{
				if(isClick)
					bitmapField.setBitmap(bitmap);

				else
					bitmapField.setBitmap(bitmapHover);

				isClick=isClick ? false :true;
				return super.navigationClick(status, time);
			}
		};
		add(bitmapField);

		add(new LabelField("Click the above Image", Field.FOCUSABLE|Field.FIELD_HCENTER));
	}
}