> 本文仿照新浪微博/QQ空间实现了滑动自动播放视频的功能。
>本文来自个人博客：http://www.zhangliwei.date
>如有疑问欢迎讨论,感谢您的关注。
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#### 效果图
---
### 关键代码
#### 1.监听滚动事件
首先要给listview添加setOnScrollListener监听,注意这个监听在recyclerView上是addOnScrollListener，也就是说下面代码同时支持recyclerView。
public int firstVisible=0,visibleCount=0, totalCount=0;
videoList.setOnScrollListener(new AbsListView.OnScrollListener() {
@Override
public void onScrollStateChanged(AbsListView view, int scrollState) {
switch (scrollState) {
case AbsListView.OnScrollListener.SCROLL_STATE_FLING:
Log.e("videoTest", "SCROLL_STATE_FLING");
break;
case AbsListView.OnScrollListener.SCROLL_STATE_IDLE:
Log.e("videoTest", "SCROLL_STATE_IDLE");
autoPlayVideo(view);
break;
case AbsListView.OnScrollListener.SCROLL_STATE_TOUCH_SCROLL:
Log.e("videoTest", "SCROLL_STATE_TOUCH_SCROLL");
break;
default:
break;
}
}
@Override
public void onScroll(AbsListView view, int firstVisibleItem,
int visibleItemCount, int totalItemCount) {
// firstVisibleItem 当前第一个可见的item
// visibleItemCount 当前可见的item个数
if (firstVisible == firstVisibleItem) {
return;
}
firstVisible = firstVisibleItem;
visibleCount = visibleItemCount;
totalCount = totalItemCount;
}
});
监听里会有两个方法，**我们用onScroll方法记录 当前第一个可见Item，以及可见Item总数，用onScrollStateChanged来监听手滑动屏幕的整个过程。** 当onScrollStateChanged 中的scrollState字段值等于SCROLL_STATE_IDLE 时，代表本次滑动完毕并停止滚动🙄感兴趣的朋友可以自行百度另外两个参数的意思，没准对你的需求有帮助🙄。
#### 2.处理视频逻辑
void autoPlayVideo(AbsListView view){
Log.e("videoTest", "firstVisiblePos = " + firstVisible + "visibleItemCount = " + visibleCount);
for (int i = 0; i < visibleCount; i++) {
if (view!=null&&view.getChildAt(i)!=null&&view.getChildAt(i).findViewById(R.id.videoplayer) != null) {
JCVideoPlayerStandard videoPlayerStandard1 = (JCVideoPlayerStandard) view.getChildAt(i).findViewById(R.id.videoplayer);
Rect rect = new Rect();
videoPlayerStandard1.getLocalVisibleRect(rect);
int videoheight3 = videoPlayerStandard1.getHeight();
Log.e("videoTest","i="+i+"==="+"videoheight3:"+videoheight3+"==="+"rect.top:"+rect.top+"==="+"rect.bottom:"+rect.bottom);
if (rect.top==0&&rect.bottom==videoheight3)
{
if (videoPlayerStandard1.currentState == JCVideoPlayer.CURRENT_STATE_NORMAL || videoPlayerStandard1.currentState == JCVideoPlayer.CURRENT_STATE_ERROR) {
Log.e("videoTest", videoPlayerStandard1.currentState + "======================performClick======================");
videoPlayerStandard1.startButton.performClick();
VPApplication.instance.VideoPlaying=videoPlayerStandard1;
}
return;
}
}
}
Log.e("videoTest", "======================releaseAllVideos=====================");
JCVideoPlayer.releaseAllVideos();
VPApplication.instance.VideoPlaying=null;
}
首先是根据总数循环判断 Item 是否有视频，如果有再利用Rect类获取视图在屏幕坐标中的可视区域。基本核心代码就这些是不是非常简单？
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### 项目源码 [autovideoplay](https://github.com/zzzlw/autovideoplayer)
### 技术博客 [Wells'Note](http://zhangliwei.date/)
### 视频播放器依赖
compile 'fm.jiecao:jiecaovideoplayer:4.6.3'
