notifyDataSetChanged上RecyclerView

Question

我有一个recyclerView和customAdaprer。我传递一个对象（earthquakeList）的列表recycleradapter然后我就setAdapter：

protected void onCreate(Bundle savedInstanceState) { 
    super.onCreate(savedInstanceState); 
    setContentView(R.layout.activity_main); 
    ButterKnife.bind(this); 
    earthquakeList = new ArrayList<>(); 
    adapter = new RecyclerViewAdapter(earthquakeList); 
    recyclerView.setAdapter(adapter); 
} 

我上的onResume方法创建的AsyncTask：

@Override 
protected void onResume() { 
    super.onResume(); 
    // Kick off an {@link AsyncTask} to perform the network request 
    new EarthQuakeAsyncTask().execute(); 
} 

中的AsyncTask

我的课我从一个新的列表我反对说，我从互联网上获得，当我更换新表与旧名单，并呼吁notifyDataSetChanged，recyclerView仍然没有显示？ 我调试我的应用程序，并从网上获取对象。 我做这样的列表视图但recylerview似乎传出。

我更换新的列表中选择一个喜欢的打击旧列表：

private class EarthQuakeAsyncTask extends AsyncTask<Void, Void, List<Earthquake>> { 
    @Override 
    protected List<Earthquake> doInBackground(Void... urls) { 

     // Create URL object 
     URL url = HttpRequest.createUrl(USGS_REQUEST_URL); 

     // perform HTTP request to the URL and receive a JSON response back 
     String jsonResponse = ""; 
     try { 
      jsonResponse = HttpRequest.makeHttpRequest(url); 
     } catch (IOException e) { 
      e.printStackTrace(); 
     } 
     List<Earthquake> earthquakes = HttpRequest.extractFeaturesFromJson(jsonResponse); 
     return earthquakes; 
    } 

    @Override 
    protected void onPostExecute(List<Earthquake> earthquakeList) { 
     super.onPostExecute(earthquakeList); 
     MainActivity.this.earthquakeList.clear(); 
     MainActivity.this.earthquakeList.addAll(earthquakeList); 
     adapter.notifyDataSetChanged(); 

    } 

究竟是什么我错了吗？

************************编辑******************** 这是适配器：

public class RecyclerViewAdapter extends RecyclerView.Adapter<RecyclerViewAdapter.MyHolder> { 

List<Earthquake> earthquakes; 


public RecyclerViewAdapter(List<Earthquake> earthquakes) { 
    this.earthquakes = earthquakes; 
} 


@Override 
public MyHolder onCreateViewHolder(ViewGroup parent, int viewType) { 
    View view = LayoutInflater.from(parent.getContext()).inflate(
      R.layout.earthquak_list_item, parent, false); 
    MyHolder myHolder = new MyHolder(view); 
    return myHolder; 
} 

@Override 
public void onBindViewHolder(MyHolder holder, int position) { 

    Earthquake earthquake = earthquakes.get(position); 
    holder.magnitude.setText(earthquake.getmMagnitude()); 
    holder.location.setText(earthquake.getmLocation()); 
    holder.time.setText(earthquake.getmDate()); 

} 

@Override 
public int getItemCount() { 
    return (null != earthquakes ? earthquakes.size() : 0); 
} 

public void setItems(List<Earthquake> earthquakeList) { 
    this.earthquakes = earthquakeList; 

} 


public class MyHolder extends RecyclerView.ViewHolder { 

    @BindView(R.id.magnitude) 
    TextView magnitude; 

    @BindView(R.id.location) 
    TextView location; 

    @BindView(R.id.date) 
    TextView time; 

    public MyHolder(View itemView) { 
     super(itemView); 
     ButterKnife.bind(this, itemView); 
    } 
} 

Answer 1

行动，我忘了把布局管理为recyclerView。

这是正确的代码：

protected void onCreate(Bundle savedInstanceState) { 
    super.onCreate(savedInstanceState); 
    setContentView(R.layout.activity_main); 
    ButterKnife.bind(this); 
    earthquakeList = new ArrayList<>(); 
    layoutManager = new LinearLayoutManager(this); 
    recyclerView.setLayoutManager(layoutManager); 
    adapter = new RecyclerViewAdapter(earthquakeList); 
    recyclerView.setAdapter(adapter); 

}