问题描述
如果有喜欢list.onLoadListener任何情况（列表与它的数据填充完成）如何进入名单的第一行？
If there is no event like list.onLoadListener(list is done with its data filling) how to access list's first row?
随着列表重用其一行性能监听器是不存在是可以理解的。但我需要访问列表的第一个项目时，至少有一个项目（第一个项目，位置0）。
As list reuses its row for performance this listener is not there that is understandable. But I need to access list's first item when at least there is one item(first item , position 0).
在设置适配器列表
list.getChildAt(0)
返回我空。那么，我需要把延迟访问的第一个项目？
returns me null. So Do i need to put delay for accessing first item?
我们可以使用列表项的点击访问监听器列表中的项目（在该项目的意见）。我想用项目时我可以肯定的是列表的第一个项目填补。
We can access list items(views in that item) on using list item click listener. I want to use item when I can be sure that list's first item has filled.
我使用TextureView播放视频列表项。因此，一旦名单充满了它的项目我想自动播放第一项的视频。（无需任何点击或用户交互）。
I am playing videos in list item using TextureView. So once list is filled with its item I want to play first item's video automatically.(without any click or user interaction).
下面是我的code： -
Here is my code :-
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.home);
list = (ListView) v.findViewById(R.id.list);
videoListDatas = new ArrayList<VideoListData>();
adapter = new MyVideoListAdapterNew(getActivity(), videoListDatas);
list.setAdapter(adapter);
getVideoList(); //Method which get data from server
}
下面是getVideoList（）方法执行
Here is getVideoList() method implementation
private void getVideoList() {
final MyProgressDialog progressDialog = new MyProgressDialog(context);
new Thread(new Runnable() {
@Override
public void run() {
try {
// Implementation goes here fill array with data
} catch (Exception e) {
e.printStackTrace();
}
runOnUiThread(new Runnable() {
@Override
public void run() {
adapter.notifyDataSetChanged();
progressDialog.dismiss();
}
});
}
}).start();
}
这是我的适配器
public class MyVideoListAdapterNew extends BaseAdapter {
Context context;
private LayoutInflater inflater;
ArrayList<VideoListData> videoListDatas;
public MyVideoListAdapterNew(FragmentActivity fragmentActivity,
ArrayList<VideoListData> videoListDatas) {
context = fragmentActivity;
this.videoListDatas = videoListDatas;
inflater = (LayoutInflater) context
.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
}
@Override
public int getCount() {
// TODO Auto-generated method stub
return videoListDatas.size();
}
@Override
public Object getItem(int position) {
// TODO Auto-generated method stub
return videoListDatas.get(position);
}
@Override
public long getItemId(int position) {
// TODO Auto-generated method stub
return 0;
}
@Override
public View getView(int position, View convertView, ViewGroup parent) {
ViewHolder holder;
if (convertView == null) {
convertView = inflater.inflate(R.layout.myvideo_row, null);
holder = new ViewHolder();
holder.flVideo = (FrameLayout) convertView
.findViewById(R.id.flVideo);
convertView.setTag(holder);
} else {
holder = (ViewHolder) convertView.getTag();
}
try {
//Filling views by getting values from array
} catch (Exception e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
if(position == 0 ){
//Code to play first video automatically
}else{
}
return convertView;
}
private static class ViewHolder {
FrameLayout flVideo;
}
}
我知道code不会帮助很多，但我只是张贴在一些人的建议。
I know code will not help much but I am just posting it on some people's suggestion.
感谢。
推荐答案
我发现从这个线程这种情况的解决方案： -
I found the solution for this situation from this thread :- http://stackoverflow.com/a/6944587/647014
我的要求是尽快完成清单的数据加载访问列表的第一个项目。这样，名单等待，直到它的数据刷新/加载。
My requirement was to accessing list's first item as soon as list completes its data loading. This way list waits till its data is refreshed/loaded.
感谢。
这篇关于访问列表的第一个项目时列表视图在android系统加载的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持！