Android Recycleview App崩溃

Question

我正在尝试创建循环视图，我也在我的应用中使用标签布局。我一步一步地按照教程，但我不知道为什么它会崩溃。这是代码。我猜这个部分有问题：

hostname -s

每当我更改返回0时，应用程序都会运行，但@Override public int getItemCount() { return herosList.size(); }

中不会显示任何内容

recycleview

RecycleAdapter.java

public class Heros {
    public String name;
    public int img;

}

Answer 1

尝试更改

 manager=new LinearLayoutManager(G.context);

要

manager=new LinearLayoutManager(getActivity());

Answer 2

检查它可能会对你有所帮助         public class PageFragment extends Fragment {     public static final String ARG_PAGE =＆＃34; ARG_PAGE＆＃34;;

private int mPage;
RecyclerView recyclerView;
LinearLayoutManager manager;
String[] names={"abs","vline","chest"};

ArrayList<Heros> passName;
RecycleAdapter adapter;
public static PageFragment newInstance(int page) {
    Bundle args = new Bundle();
    args.putInt(ARG_PAGE, page);
    PageFragment fragment = new PageFragment();
    fragment.setArguments(args);
    return fragment;
}

@Override
public void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    mPage = getArguments().getInt(ARG_PAGE);
}

@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
                         Bundle savedInstanceState) {
    passName=new ArrayList<>();


    View view = inflater.inflate(R.layout.fragment_page, container,
            false);
    recyclerView=(RecyclerView)view.findViewById(R.id.rec);
    manager=new LinearLayoutManager(G.context);
    recyclerView.setLayoutManager(manager);
    recyclerView.setHasFixedSize(true);
    for (int i=0;i<3;i++){
        Heros heros=new Heros();
        heros.name=names[i];
        passName.add(heros);
    }
 RecyclerView.LayoutManager mLayoutManager = new LinearLayoutManager(this);
                recyclerView.setLayoutManager(mLayoutManager);
adapter = new RecycleAdapter(this,passName);
    recyclerView.setAdapter(adapter);
    return view;
}

}

Answer 3

当你在getItemCount()中返回0时，它表示RecyclerView中有0个项目。这就是你无法在RecyclerView中看到任何内容的原因。

然而，您遇到的问题可能是由于适配器接收到错误的数据......