如何让可移动和可调整大小的画布绘制Android？

public class MyView extends View {
    private Paint paint;
    private float canvasTranslateX;
    private float canvasTranslateY;
    private float canvasScale;

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

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

    private void init() {
        paint = new Paint();
        paint.setColor(Color.RED);
        canvasTranslateX = 0;
        canvasTranslateY = 0;
        canvasScale = 1;
    }

    @Override
    protected void onDraw(Canvas canvas) {
        super.onDraw(canvas);

        // 移动画布
        canvas.translate(canvasTranslateX, canvasTranslateY);

        // 缩放画布
        canvas.scale(canvasScale, canvasScale);

        // 绘制图形和内容
        canvas.drawRect(0, 0, getWidth(), getHeight(), paint);
        // 其他绘制操作...

    }

    @Override
    public boolean onTouchEvent(MotionEvent event) {
        switch (event.getAction()) {
            case MotionEvent.ACTION_MOVE:
                // 根据手指移动距离调整画布的位置
                canvasTranslateX += event.getX() - event.getHistoricalX(0);
                canvasTranslateY += event.getY() - event.getHistoricalY(0);
                invalidate();
                break;
        }
        return true;
    }

    @Override
    protected void onSizeChanged(int w, int h, int oldw, int oldh) {
        super.onSizeChanged(w, h, oldw, oldh);

        // 根据新的视图宽度和高度调整画布的大小
        float scaleX = (float) w / oldw;
        float scaleY = (float) h / oldh;
        canvasScale *= Math.min(scaleX, scaleY);
        invalidate();
    }
}