SlidingMenu+ViewPage+ViewPage嵌套(类似网易 ) 滑动时冲突问题解决

最新推荐文章于 2020-03-03 11:38:12 发布

原创最新推荐文章于 2020-03-03 11:38:12 发布 · 966 阅读

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CC 4.0 BY-SA版权

本文详细解析了滑动视图如何通过onInterceptTouchEvent方法实现触摸事件拦截，包括事件处理流程和关键逻辑。

SlidingView onInterceptTouchEvent代码

public boolean onInterceptTouchEvent(MotionEvent ev) {
		System.out.println("SlidingView onInterceptTouchEvent");
	
		final int action = ev.getAction();
		final float x = ev.getX();
		final float y = ev.getY();

		switch (action) {
		case MotionEvent.ACTION_DOWN:
			mIsAlreadySetViewState = false;
			mLastMotionX = x;
			mLastMotionY = y;
			mIsBeingDragged = false;
			break;

		case MotionEvent.ACTION_MOVE:
			final float dx = x - mLastMotionX;
			final float xDiff = Math.abs(dx);
			final float yDiff = Math.abs(y - mLastMotionY);
			if(askChild(this,ev,  dx)){
			      return false;
			}
			if (xDiff > mTouchSlop && xDiff > yDiff) {
				mIsBeingDragged = true;
				mLastMotionX = x;
			}
			break;

		}
		return mIsBeingDragged;
	}

ViewPage onInterceptTouchEvent代码

@Override
	public boolean onInterceptTouchEvent(MotionEvent ev) {
		System.out.println("MyViewPage onInterceptTouchEvent");
		System.out.println(ev.getY()+"a");
		if(ev.getY()<320){
			System.out.println("ev.getY()<320");
			getParent().requestDisallowInterceptTouchEvent(true);  
			return false;//true viewPage可以使用
		}
		final int action = ev.getAction();
		final float x = ev.getX();
		switch (action) {
			case MotionEvent.ACTION_DOWN:
				mLastMotionX = x;
				break;
			case MotionEvent.ACTION_MOVE:
				final float dx = x - mLastMotionX;
				System.out.println(ev.getY()+"b");
				if(/*dx>0&&*/getCurrentItem()==0) {
					System.out.println("getCurrentItem()==0");
					System.out.println(ev.getY()+"a");
					if(ev.getY()<320){
						System.out.println("ev.getY()<320");
						getParent().requestDisallowInterceptTouchEvent(true);  
						return false;//true viewPage可以使用
					}
					else{
						if(dx>0)
						return false;
					}
				}
				break;
		}
		return true;
	}

用于图片展示的ViewPage 不需要重写
完整代码 http://download.youkuaiyun.com/detail/lj102800/7028939