Java android移除一个矩形并绘制图像的其余部分

public class CustomView extends View {
    private Bitmap image;
    private Rect rect;
    private Paint paint;

    public CustomView(Context context) {
        super(context);
        image = BitmapFactory.decodeResource(getResources(), R.drawable.image);
        rect = new Rect(100, 100, 400, 400);
        paint = new Paint();
        paint.setColor(Color.RED);
        paint.setStrokeWidth(5);
    }

    @Override
    protected void onDraw(Canvas canvas) {
        super.onDraw(canvas);
        
        // 绘制图像
        canvas.drawBitmap(image, 0, 0, null);
        
        // 绘制矩形
        canvas.drawRect(rect, paint);
        
        // 移除矩形并绘制图像的其余部分
        canvas.clipRect(rect, Region.Op.DIFFERENCE);
        canvas.drawBitmap(image, 0, 0, null);
    }
}