當外層豎向滑動ScrollView裡面巢狀橫向的滑動佈局時，會發先內層橫向滑動很卡頓

原因：左右滑動操作被外層的scrollView處理掉了

解決：只要讓scrollview對左右滑動事件不監聽，讓其子控制元件處理左右滑動事件 即可，需要重寫scrollview的onInterceptTouchEvent方法，如下：

public class VerticalScrollView extends ScrollView {
    private float xDistance, yDistance, xLast, yLast;

    public VerticalScrollView(Context context) {
        super
 
(context);
    }

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

    public VerticalScrollView(Context context, AttributeSet attrs, int defStyle) {
        super(context, attrs, defStyle);
    }

    @Override
public boolean onInterceptTouchEvent(MotionEvent ev) {
        switch 
 
(ev.getAction()) {
            case MotionEvent.ACTION_DOWN:
                xDistance = yDistance = 0f;
                xLast = ev.getX();
                yLast = ev.getY();
                break;
            case MotionEvent.ACTION_MOVE:
                final float curX = ev.getX();
                final float 
 
curY = ev.getY();

                xDistance += Math.abs(curX - xLast);
                yDistance += Math.abs(curY - yLast);
                xLast = curX;
                yLast = curY;

                if (xDistance > yDistance) {
                    return false;
                }
        }
        return super.onInterceptTouchEvent(ev);
    }
}