如何在Android Studio中绘制多个矩形并移动它们(通过触摸)，而无需对每个矩形进行单独编程

public class CustomView extends View {
    private Rect[] rects;

    public CustomView(Context context) {
        super(context);
        init();
    }

    public CustomView(Context context, AttributeSet attrs) {
        super(context, attrs);
        init();
    }

    private void init() {
        // 初始化矩形数组
        rects = new Rect[3];
        rects[0] = new Rect(100, 100, 200, 200);
        rects[1] = new Rect(300, 300, 400, 400);
        rects[2] = new Rect(500, 500, 600, 600);
    }

    @Override
    protected void onDraw(Canvas canvas) {
        super.onDraw(canvas);
        
        // 绘制矩形
        for (Rect rect : rects) {
            canvas.drawRect(rect, new Paint());
        }
    }

    @Override
    public boolean onTouchEvent(MotionEvent event) {
        // 处理触摸事件，移动矩形
        switch (event.getAction()) {
            case MotionEvent.ACTION_MOVE:
                // 获取触摸点的坐标
                float x = event.getX();
                float y = event.getY();
                
                // 移动矩形
                for (Rect rect : rects) {
                    rect.offset((int) x, (int) y);
                }
                
                // 重绘View
                invalidate();
                break;
        }
        
        return true;
    }
}

public class MainActivity extends AppCompatActivity {
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        
        // 设置布局文件
        setContentView(R.layout.activity_main);
        
        // 获取自定义View组件
        CustomView customView = findViewById(R.id.custom_view);
    }
}

<com.example.app.CustomView
    android:id="@+id/custom_view"
    android:layout_width="match_parent"
    android:layout_height="match_parent" />