@Override
public boolean dispatchTouchEvent(MotionEvent ev) {
    switch (ev.getAction()) {
        case MotionEvent.ACTION_DOWN:
            y = ev.getY();
x = ev.getX();
getParent().requestDisallowInterceptTouchEvent(true);
            break;
        case MotionEvent.ACTION_MOVE:
            if (Math.abs
 
(ev.getX() - x) > Math.abs(ev.getY() - y))
                getParent().requestDisallowInterceptTouchEvent(true);
            else
getParent().requestDisallowInterceptTouchEvent(false);
            break;
        case MotionEvent.ACTION_UP:
        case MotionEvent.ACTION_CANCEL:
            getParent().requestDisallowInterceptTouchEvent(false
 
);
            break;
        default:
            break;
}

重寫ViewPage 覆蓋以上方法