RecyclerView不刷新onClick

Question

当我在主要活动中调用RecyclerView时，RecyclerView正在被刷新，但是当我使用FloatingActionButton时，它不再起作用，并且它没有给出任何错误。

从MainActivity

protected void onCreate(Bundle savedInstanceState) { 
    super.onCreate(savedInstanceState); 
    setContentView(R.layout.activity_main); 
    Toolbar toolbar = (Toolbar) findViewById(R.id.toolbar); 
    setSupportActionBar(toolbar); 

    //Initially get the events 
    dh.getEvents(); 

    //Initially setting the list fragment 
    EventListFragment eventListFragment = new EventListFragment(); 
    FragmentTransaction fragmentTransaction = getSupportFragmentManager().beginTransaction(); 
    fragmentTransaction.replace(R.id.frame, eventListFragment, "list_fragment"); 
    fragmentTransaction.commit(); 

    FloatingActionButton fab = (FloatingActionButton) findViewById(R.id.fab); 
    fab.setOnClickListener(new View.OnClickListener() { 
     @Override 
     public void onClick(View view) { 
      dh.getEvents(); 
     } 
    }); 
} 

此的onCreate方法是从DataHandaling类getEvents()方法

public void getEvents() { 

    OkHttpClient client = new OkHttpClient(); 

    Request request = new Request.Builder() 
      .url(enviroClass.url() + "/api/events/" + 7) 
      .build(); 

    client.newCall(request) 
      .enqueue(new Callback() { 
       @Override 
       public void onFailure(Call call, IOException e) { 
        e.printStackTrace(); 
       } 

       @Override 
       public void onResponse(Call call, Response response) throws IOException { 
        try { 
         JSONObject eventObject = new JSONObject(response.body().string()); 
         JSONArray eventJsonArray = eventObject.getJSONArray("events"); 
         for (int i = 0; i<eventJsonArray.length(); i++) { 
          eventObject = eventJsonArray.getJSONObject(i); 
          eventObject = eventObject.getJSONObject("event"); 
          eventArray.add(new Event(eventObject.getString("name"), eventObject.getString("address"), eventObject.getString("image"), "100", eventObject.getString("description"), eventObject.getString("start_date"), eventObject.getString("end_date"), eventObject.getInt("id"))); 
         } 
         EventListAdapter adapter = new EventListAdapter(eventArray, null); 
         adapter.notifyDataSetChanged(); 
        } catch (JSONException e) { 
         e.printStackTrace(); 
        } 
       } 
      }); 
} 

UPDATE

这是正在使用

的RecyclerAdapter

public class EventListAdapter extends RecyclerView.Adapter<EventListAdapter.ViewHolder> { 

    DataHandaling dh = new DataHandaling(); 

    private static ArrayList<Event> mValues; 
    private OnListFragmentInteractionListener mListener = null; 

    public EventListAdapter(ArrayList<Event> items, OnListFragmentInteractionListener listener) { 
     if (items != null) { 
      mValues = items; 
     } 
     if (listener != null) { 
      mListener = listener; 
     } 
    } 

    public void swap(ArrayList<Event> eventArray) { 
     mValues.clear(); 

     mValues.addAll(eventArray); 
     notifyDataSetChanged(); 
    } 

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

    @Override 
    public void onBindViewHolder(final ViewHolder holder, final int position) { 
     holder.mItem = mValues.get(position); 
     holder.mIdView.setText(mValues.get(position).getStarTime()); 
     holder.mContentView.setText(mValues.get(position).getName()); 
     Picasso.with(getApplicationContext()).load(mValues.get(position).getImage()).into(holder.mImageView); 

     holder.mView.setOnClickListener(new View.OnClickListener() { 
      @Override 
      public void onClick(View v) { 
       if (null != mListener) { 
        // Notify the active callbacks interface (the activity, if the 
        // fragment is attached to one) that an item has been selected. 
        mListener.onListFragmentInteraction(position); 
       } 
      } 
     }); 
    } 

    @Override 
    public int getItemCount() { 
     return mValues.size(); 
    } 

    public class ViewHolder extends RecyclerView.ViewHolder { 
     public final View mView; 
     public final TextView mIdView; 
     public final TextView mContentView; 
     public final ImageView mImageView; 
     public Event mItem; 

     public ViewHolder(View view) { 
      super(view); 
      mView = view; 
      mIdView = (TextView) view.findViewById(R.id.id); 
      mContentView = (TextView) view.findViewById(R.id.content); 
      mImageView = (ImageView) view.findViewById(R.id.eventImage); 
     } 

     @Override 
     public String toString() { 
      return super.toString() + " '" + mContentView.getText() + "'"; 
     } 
    } 
} 

这是片段onCreateView，其中适配器设置

@Override 
public View onCreateView(LayoutInflater inflater, ViewGroup container, 
         Bundle savedInstanceState) { 
    View view = inflater.inflate(R.layout.fragment_item_list, container, false); 

    // Set the adapter 
    if (view instanceof RecyclerView) { 
     Context context = view.getContext(); 
     RecyclerView recyclerView = (RecyclerView) view; 
     if (mColumnCount <= 1) { 
      recyclerView.setLayoutManager(new LinearLayoutManager(context)); 
     } else { 
      recyclerView.setLayoutManager(new GridLayoutManager(context, mColumnCount)); 
     } 

     recyclerView.setAdapter(new EventListAdapter(dh.getEventArray(), mListener)); 
    } 
    return view; 
} 

Answer 1

如果您创建一个新的适配器，您需要将其设置在RecyclerView

EventListAdapter adapter = new EventListAdapter(eventArray, null); 
myRecyclerView.setAdapter(adapter) 

类DataHandling应有权访问RecyclerView

或者您可以使用以前创建的适配器：

在片段，更改：

recyclerView.setAdapter(new EventListAdapter(dh.getEventArray(), mListener)); 

通过

mAdapter = new EventListAdapter(dh.getEventArray(), mListener) 
recyclerView.setAdapter(mAdapter); 

在getEvents（）：

mAdapter.swap(eventArray); 

这意味着DataHandling类应该有机会获得mAdapter，你可以通过它在构造器中，或者您应该将getEvents()移动到Fragment和de lete DataHandling class