RecyclerView運行良好，但沒有結果

Question

我也跟着上youtube教程ABT RecyclerView，並寫了沒有錯誤的運行，但未按預期的任何幫助，請這方面我的代碼

XML顯示列表的代碼和適配器

custom_list_row.xml

<?xml version="1.0" encoding="utf-8"?> 
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" 
    android:orientation="horizontal" android:layout_width="match_parent" 
    android:layout_height="match_parent"> 
    <ImageView 
     android:id="@+id/img_item" 
     android:layout_width="wrap_content" 
     android:layout_height="wrap_content" 
     android:src="@drawable/ic_launcher"/> 

    <TextView 
     android:id="@+id/title_item" 
     android:layout_width="wrap_content" 
     android:layout_height="wrap_content" 
     android:text="Dummy Text" 
     android:paddingTop="5dp" 
     android:paddingLeft="15dp" 
     android:textColor="#ff281c9b" /> 


</LinearLayout> 

vanguard_news.xml

<?xml version="1.0" encoding="utf-8"?> 

    <android.support.v4.widget.SwipeRefreshLayout xmlns:android="http://schemas.android.com/apk/res/android" 
     android:id="@+id/swipe_container" 
     android:layout_width="match_parent" 
     android:layout_height="match_parent" 
     android:layout_marginTop="56dp"> 

    <android.support.v7.widget.RecyclerView 
     android:id="@+id/feed_list" 
     android:layout_height="match_parent" 
     android:layout_width="wrap_content"> 

    </android.support.v7.widget.RecyclerView> 

    </android.support.v4.widget.SwipeRefreshLayout> 

類代碼

ViewAdapter.class

public class ViewAdapter extends RecyclerView.Adapter <ViewAdapter.MyViewHolder>{ 
    LayoutInflater inflater; 
    List<ReViewInformation> data= Collections.emptyList(); 

    public ViewAdapter(Context context, List<ReViewInformation> data){ 
     inflater=LayoutInflater.from(context); 
    } 

    @Override 
    public MyViewHolder onCreateViewHolder(ViewGroup parent, int viewType) { 
     View view=inflater.inflate(R.layout.custom_list_row,parent, false); 
     MyViewHolder holder = new MyViewHolder(view); 

     return holder; 
    } 

    @Override 
    public void onBindViewHolder(MyViewHolder holder, int position) { 
     ReViewInformation currObj = data.get(position); 
     holder.title.setText(currObj.Title); 
     holder.image.setImageResource(currObj.id); 
    } 

    @Override 
    public int getItemCount() { 
     return 0; 
    } 

    class MyViewHolder extends RecyclerView.ViewHolder{ 
     TextView title; 
     ImageView image; 

     public MyViewHolder(View itemView) { 
      super(itemView); 
      title= (TextView) itemView.findViewById(R.id.title_item); 
      image = (ImageView) itemView.findViewById(R.id.img_item); 

     } 
    } 
} 

ReViewInformation.class

public class ReViewInformation { 
    int id; 
    String Title; 
} 

_1Vanguard_News.class

public class _1Vanguard_News extends Fragment implements OnRefreshListener{ 
    SwipeRefreshLayout swipeLayout; 
    RecyclerView recyclerView; 
    private ViewAdapter adapter; 


    @Override 
    public View onCreateView(LayoutInflater inflater, ViewGroup container, 
      Bundle savedInstanceState) { 
     // TODO Auto-generated method stub 
     View view; 
     view = inflater.inflate(R.layout.vanguard_news, container, false); 

     //view = inflater.inflate(R.layout.principal, container, false); 
     //Recycle list view 
     recyclerView = (RecyclerView) view.findViewById(R.id.feed_list); 
     adapter = new ViewAdapter(getActivity(),getData()); 
     recyclerView.setAdapter(adapter); 
     recyclerView.setLayoutManager(new LinearLayoutManager(getActivity())); 
     //Swipe to refresh view 
     swipeLayout = (SwipeRefreshLayout) view.findViewById(R.id.swipe_container); 
     swipeLayout.setColorSchemeResources(R.color.orange, R.color.green, R.color.blue); 
     swipeLayout.setOnRefreshListener(this); 
     return view; 
    } 

    public static List<ReViewInformation> getData(){ 
     List<ReViewInformation> data= new ArrayList(); 
     int []icons={R.drawable.france,R.drawable.brazil,R.drawable.ic_launcher}; 
     String []titles={"hgjhgbn","hKHk","hgdjgj"}; 
     for(int i = 0; i <3; i++){ 
      ReViewInformation curr = new ReViewInformation(); 
      curr.id = icons[i]; 
      curr.Title = titles[i]; 
      data.add(curr); 
     } 
     return data; 
    } 


    @Override 
    public void onRefresh() { 
     // TODO Auto-generated method stu 
    } 

} 

截屏

有什麼我失蹤？

Answer 1

getItemCount()返回適配器保存的數據集中的項目總數。如果你return 0，其他方法不被調用。更改

List<ReViewInformation> data= Collections.emptyList(); 

public ViewAdapter(Context context, List<ReViewInformation> data){ 
    inflater=LayoutInflater.from(context); 
} 

到

List<ReViewInformation> data; 

public ViewAdapter(Context context, List<ReViewInformation> data){ 
    inflater=LayoutInflater.from(context); 
    this.data = data; 
} 

和

@Override 
public int getItemCount() { 
    if (data == null) { 
     return 0; 
    } 
    return data.size(); 
}