ViewPager触摸事件与其片段中的可拖动视图冲突

Question

我已经在ViewPager的Fragment中实现了拖动以关闭和缩放视图。现在，它的滑动并不平滑，因为ViewPager和Fragment中的视图的触摸彼此冲突。因此，我编写了一个CustomViewPager类来覆盖' onInterceptTouchEvent '方法，这样我可以检测到它是否为水平滑动并且片段视图尚未缩放或拖动，则ViewPager应该使用触摸以避免冲突并进行滑动流畅。但是我面临的问题是，单击按钮也无法获得操作，因为ViewPager不会将触摸传递给它们，如果我没有在ViewPager中拦截触摸，则ViewPager和片段会发生冲突。我该如何允许孩子点击并消耗其他事件，例如ACTION_MOVE，直到我希望它传递给孩子。

CustomViewPager：

public class DemoViewPager extends ViewPager {
    private final int THRESHOLD = ScreenUtils.dpToPx(20);
    float diffX, diffY;
    private float initialXValue;
    private float initialYValue;
    private MotionEventListener motionEventListener;

    public DemoViewPager(@NonNull Context context) {
        super(context);
    }

    public DemoViewPager(@NonNull Context context, @Nullable AttributeSet attrs) {
        super(context, attrs);
    }

    @Override
    public boolean onInterceptTouchEvent(MotionEvent ev) {


        switch (ev.getAction()) {
            case MotionEvent.ACTION_DOWN:

                initialXValue = ev.getX();
                initialYValue = ev.getY();

                return true;
//                break;
            case MotionEvent.ACTION_MOVE:

                diffX = ev.getX() - initialXValue;
                diffY = ev.getY() - initialYValue;


                boolean isHorizontalSwipe = Math.abs(diffY) < THRESHOLD;
                boolean isDraggable = motionEventListener != null && (motionEventListener.isDragging() || motionEventListener.isZoomed());


                if (!isHorizontalSwipe || isDraggable) {
                    return true;
                }

//                return true;
            break;
            case MotionEvent.ACTION_UP:
            case MotionEvent.ACTION_CANCEL:

                break;
            //return true;
        }

        return super.onInterceptTouchEvent(ev);
    }

    @Override
    public boolean onTouchEvent(MotionEvent ev) {

       switch (ev.getAction()) {
            case MotionEvent.ACTION_DOWN:

                initialXValue = ev.getX();
                initialYValue = ev.getY();

                if (motionEventListener != null)
                    motionEventListener.onMotionEventReceived(ev);

                break;
            case MotionEvent.ACTION_MOVE:

                diffX = ev.getX() - initialXValue;
                diffY = ev.getY() - initialYValue;

                boolean isHorizontalSwipe = Math.abs(diffY) < THRESHOLD;
                boolean isDraggable = motionEventListener != null && (motionEventListener.isDragging() || motionEventListener.isZoomed());


                if (!isHorizontalSwipe || isDraggable) {
                    if (motionEventListener != null)
                        motionEventListener.onMotionEventReceived(ev);

                    if (isDraggable)
                        return false;
                }

                break;

            case MotionEvent.ACTION_UP:
            case MotionEvent.ACTION_CANCEL:
                if (motionEventListener != null)
                    motionEventListener.onMotionEventReceived(ev);

                break;
        }

        return super.onTouchEvent(ev);
    }

    public void setMotionEventListener(MotionEventListener motionEventListener) {
        this.motionEventListener = motionEventListener;
    }

    public interface MotionEventListener {
        void onMotionEventReceived(MotionEvent motionEvent);

        boolean isDragging();

        boolean isZoomed();
    }

}