片段中的同步呼叫在第一次启动时没有运行并且获取错误数据

的问题是，也许你正在添加许多条目，因为recyclerview试图重用这些意见，而不是再次重新划分和再次这导致有时看法不一致。这是问题discussed如果您遇到同样的问题，请查看它。 禁用它或者启用它在你的bindViewHolder（）

setIsRecyclable(Boolean enable)

使用和你的第二个问题是，onCreateView（）从另一个片段回来造成加时被称为第二次再次复制数据，因此您需要在添加任何新条目之前清除列表，并且为什么它在第一次运行时不显示，因为您已经在另一个线程中添加了数据并且没有更新适配器。

List<NewsModel> resultList = new ArrayList<>(); 
NewsAdapter adapter ; 
public class NewsFragment extends Fragment { 
@Override 
public View onCreateView(LayoutInflater inflater, ViewGroup container, 
         Bundle savedInstanceState) { 
    View newsView = inflater.inflate(R.layout.fragment_news, container, false); 
    RecyclerView newsRecyclerView = (RecyclerView) newsView.findViewById(R.id.news_list); 
    LinearLayoutManager layoutManager = new LinearLayoutManager(getActivity()); 
    newsRecyclerView.setLayoutManager(layoutManager); 
    adapter = new NewsAdapter(resultList); 
    newsRecyclerView.setAdapter(adapter); 
    getNews(); 
    return newsView; 
} 
    private void getNews(){ 
     AsyncTask<Void,Void,String> asyncTask = new AsyncTask<Void, Void, String>() { 
      @Override 
      protected String doInBackground(final Void... voids) { 
       String resultString = null; 
       OkHttpClient client = new OkHttpClient(); 
       Request request = new Request.Builder() 
         .url("http://www.career.fudan.edu.cn/jsp/career_talk_list.jsp?count=50&list=true") 
         .build(); 
       Response response = null; 
       try { 
        response = client.newCall(request).execute(); 
        resultString = response.body().string(); 
       } catch (IOException e) { 
        e.printStackTrace(); 
       } 
       return resultString; 
      } 
      @Override 
      protected void onPostExecute(final String resultString) { 
       super.onPostExecute(resultString); 
       resultList.clear(); 
       resultList.addAll(getResult(resultString)); 
       adapter.notifyDataSetChanged(); 
      } 
     }.execute(); 
    } 

线程将改变一些延迟resultList，但在此之前，已经通过旧数据。 请尝试以下...

public class NewsFragment extends Fragment { 
@Override 
public View onCreateView(LayoutInflater inflater, ViewGroup container, 
         Bundle savedInstanceState) { 
    View newsView = inflater.inflate(R.layout.fragment_news, container, false); 
    RecyclerView newsRecyclerView = (RecyclerView) newsView.findViewById(R.id.news_list); 
    LinearLayoutManager layoutManager = new LinearLayoutManager(getActivity()); 
    newsRecyclerView.setLayoutManager(layoutManager); 
    getNews(newsRecyclerView); 
    return newsView; 
} 
private void getNews(final RecyclerView newsRecyclerView){ 
    new Thread(new Runnable() { 
     @Override 
     public void run() { 
      try { 
       OkHttpClient client = new OkHttpClient(); 
       Request request = new Request.Builder() 
         .url("http://www.career.fudan.edu.cn/jsp/career_talk_list.jsp?count=50&list=true") 
         .build(); 
       Response response = client.newCall(request).execute(); 
       String resultString = response.body().string(); 
       List<NewsModel> resultList = getResult(resultString); 
       NewsAdapter adapter = new NewsAdapter(resultList); 
       newsRecyclerView.setAdapter(adapter); 
      } catch (Exception e) { 
       e.printStackTrace(); 
      } 
     } 
    }).start(); 
} 
private List<NewsModel> getResult(final String response) { 
    XXXXXXXXX 
    return List; 
} 

主要模式是坏的。 此代码最简单的方法是在适配器下载并调用notifyDataSetChanged（）时设置（不添加）适配器中的项目 - 所有单元格都将重绘。

所以使适配器字段，添加方法适配器使用setData（）和：

... 
Response response = client.newCall(request).execute(); 
String resultString = response.body().string(); 
resultList = getResult(resultString); 
new Handler(Looper.getMainLooper()).postDelayed(new Runnable() { 
     @Override 
     public void run() { 
      adapter.setData(results); 
      adapter.notifyDataSetChanged(); 
     } 
    });