自定义NestedScrollView解决包裹ViewPager

    public class MNestedScrollView extends NestedScrollView {
    private float xDistance, yDistance, xLast, yLast;

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

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

    public MNestedScrollView(@NonNull Context context, @Nullable AttributeSet attrs, int defStyleAttr) {
        super(context, attrs, defStyleAttr);
    }

    @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) {
                    // 返回true，表示当前控件要拦截事件，紧接着事件交给当前控件的onTouchEvent方法来处理。
                    // 返回默认/false，表示不拦截事件，事件最终继续往下分发。
                    return false;
                }
        }
        return super.onInterceptTouchEvent(ev);
    }
}