안드로이드 - onDraw 사용하기 예제

public class RenderViewTest extends Activity {

class RenderView extends View{

Random rand = new Random();

public RenderView(Context context) {

super(context);

}

protected void onDraw(Canvas canvas){

canvas.drawRGB(rand.nextInt(256), rand.nextInt(256), rand.nextInt(256));

invalidate();

}

}

@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(new RenderView(this));

}

}