解决横向滑动ViewPager时，上下偏移会失去焦点

[android]代码库

//是因为ListView和ViewPager滑动事件冲突，重写一个ListView就可以了
public class MyListView extends ListView {
    private GestureDetector mGestureDetector;
    View.OnTouchListener mGestureListener;
    public MyListView (Context context) {
        super (context);
    }
    public MyListView (Context context, AttributeSet attrs) {
        super (context, attrs);
        mGestureDetector = new GestureDetector (new YScrollDetector() );
        setFadingEdgeLength (0);
    }
    public MyListView (Context context, AttributeSet attrs, int defStyle) {
        super (context, attrs, defStyle);
    }
    @Override
    public boolean onInterceptTouchEvent (MotionEvent ev) {
        return super.onInterceptTouchEvent (ev) && mGestureDetector.onTouchEvent (ev);
    }
    class YScrollDetector extends SimpleOnGestureListener {
        @Override
        public boolean onScroll (MotionEvent e1, MotionEvent e2, float distanceX, float distanceY) {
            if (distanceY != 0 && distanceX != 0) {

            }
            if (Math.abs (distanceY) >= Math.abs (distanceX) ) {
                return true;
            }
            return false;
        }
    }
}