viewpager2嵌套xBanner滑动冲突问题

[Dev-AHeng]

xBanner写在viewpager2里, 然后xBanner就不能滑动了, 求大佬解决一下, 有点急！！

[KamiNoYuki]

没错，我也是viewPager2嵌套存在滑动冲突

[uaoan]

我也是，解决不了

[643063150]

没错，我也是viewPager2嵌套存在滑动冲突

`public class NestedScrollableHost extends FrameLayout {
private int touchSlop = 0;
private float initialX = 0f;
private float initialY = 0f;

public NestedScrollableHost(@NonNull Context context) {
    super(context);
    init(context);
}

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

private void init(@NonNull Context context) {
    touchSlop = ViewConfiguration.get(context).getScaledTouchSlop();
}

@Nullable
private ViewPager2 getParentViewPager() {
    ViewParent v = getParent();
    while (v != null && !(v instanceof ViewPager2)) {
        v = v.getParent();
    }
    return (ViewPager2) v;
}

@Nullable
private View getChild() {
    if (getChildCount() > 0) {
        if (getChildAt(0) instanceof XBanner) {
            return ((XBanner) getChildAt(0)).getViewPager();
        } else {
            return getChildAt(0);
        }
    } else {
        return null;
    }
}

private boolean canChildScroll(int orientation, float delta) {
    int direction = -(int) delta;
    View child = getChild();
    boolean result;
    switch (orientation) {
        case 0:
            result = child != null && child.canScrollHorizontally(direction);
            break;
        case 1:
            result = child != null && child.canScrollVertically(direction);
            break;
        default:
            throw new IllegalArgumentException();
    }
    return result;
}

@Override
public boolean onInterceptTouchEvent(@NonNull MotionEvent e) {
    handleInterceptTouchEvent(e);
    return super.onInterceptTouchEvent(e);
}

private void handleInterceptTouchEvent(@NonNull MotionEvent e) {
    ViewPager2 parentViewPager = getParentViewPager();
    if (parentViewPager == null) {
        return;
    }

    int orientation = parentViewPager.getOrientation();

    if (!canChildScroll(orientation, -1f) && !canChildScroll(orientation, 1f)) {
        return;
    }

    if (e.getAction() == MotionEvent.ACTION_DOWN) {
        initialX = e.getX();
        initialY = e.getY();
        getParent().requestDisallowInterceptTouchEvent(true);
    } else if (e.getAction() == MotionEvent.ACTION_MOVE) {
        float dx = e.getX() - initialX;
        float dy = e.getY() - initialY;
        boolean isVpHorizontal = orientation == ViewPager2.ORIENTATION_HORIZONTAL;

        float scaledDx = Math.abs(dx) * (isVpHorizontal ? .5f : 1f);
        float scaledDy = Math.abs(dy) * (isVpHorizontal ? 1f : .5f);

        if (scaledDx > touchSlop || scaledDy > touchSlop) {
            if (isVpHorizontal == (scaledDy > scaledDx)) {
                getParent().requestDisallowInterceptTouchEvent(false);
            } else {
                if (canChildScroll(orientation, isVpHorizontal ? dx : dy)) {
                    getParent().requestDisallowInterceptTouchEvent(true);
                } else {
                    getParent().requestDisallowInterceptTouchEvent(false);
                }
            }
        }
    }
}

}`
包裹住xbanner