解决SwipeRefreshLayout拦截ViewPager的滑动冲突

/**
 * Created by shengqf
 * Email : [email protected]
 * date : 2020/2/20
 * describe : 解决SwipeRefreshLayout拦截ViewPager的滑动冲突
 */
public class ViewPagerSwipeRefreshLayout extends SwipeRefreshLayout {
    
    

    private float mStartX = 0;
    private float mStartY = 0;

    //ViewPager是否被拖动
    private boolean mIsVpDrag;

    //判断滑动的最小距离
    private int mTouchSlop;

    public ViewPagerSwipeRefreshLayout(@NonNull Context context) {
    
    
        super(context, null);
    }

    public ViewPagerSwipeRefreshLayout(@NonNull Context context, @Nullable AttributeSet attrs) {
    
    
        super(context, attrs);
        mTouchSlop = ViewConfiguration.get(context).getScaledTouchSlop();
    }

    @Override
    public boolean onInterceptTouchEvent(MotionEvent ev) {
    
    
        int action = ev.getAction();
        switch (action) {
    
    
            case MotionEvent.ACTION_DOWN:
                mStartX = ev.getX();
                mStartY = ev.getY();
                mIsVpDrag = false;
                break;
            case MotionEvent.ACTION_MOVE:
                //如果ViewPager正在被拖拽，则不拦截ViewPager事件
                if (mIsVpDrag) {
    
    
                    return false;
                }
                float endX = ev.getX();
                float endY = ev.getY();
                float distanceX = Math.abs(endX - mStartX);
                float distanceY = Math.abs(endY - mStartY);
                //如果X方向的位移大于Y方向的位移，则不拦截ViewPager的事件
                if (distanceX > mTouchSlop && distanceX > distanceY) {
    
    
                    mIsVpDrag = true;
                    return false;
                }
                break;
            case MotionEvent.ACTION_UP:
            case MotionEvent.ACTION_CANCEL:
                mIsVpDrag = false;
                break;
        }
        return super.onInterceptTouchEvent(ev);
    }
}