Button btn = (Button) findViewById(R.id.button);

		Bitmap pressBmp = BitmapFactory.decodeResource(getResources(), R.drawable.press);
		Bitmap checkBmp = BitmapFactory.decodeResource(getResources(), R.drawable.check);
		Bitmap normalBmp = BitmapFactory.decodeResource(getResources(), R.drawable.normal);

		Drawable pressDraw = new BitmapDrawable(getResources(), pressBmp);
		Drawable checkDraw = new BitmapDrawable(getResources(), checkBmp);
		Drawable normalDraw = new BitmapDrawable(getResources(), normalBmp);

		StateListDrawable drawable = new StateListDrawable();
		drawable.addState(new int[]{android.R.attr.state_pressed}, pressDraw);
		drawable.addState(new int[]{android.R.attr.state_selected}, checkDraw);
		drawable.addState(new int[]{}, normalDraw);

		btn.setBackground(drawable);