我的 LinearLayoutManager
有一个错误,当我运行这段代码时它说
error: incompatible types: NotificationFragment cannot be converted to Context
这是我的代码 NotificationFragment.java
public class NotificationFragment extends Fragment {
private RecyclerView recyclerView;
private NotificationAdapter adapter;
private ArrayList<NotificationModel> notificationModelArrayList;
@Nullable
@Override
public View onCreateView(LayoutInflater inflater, @Nullable ViewGroup container, @Nullable Bundle savedInstanceState) {
return inflater.inflate(R.layout.fragment_notification,container,false);
addData();
recyclerView = (RecyclerView) getView().findViewById(R.id.recycler_view);
adapter = new NotificationAdapter(notificationModelArrayList);
RecyclerView.LayoutManager layoutManager = new LinearLayoutManager(NotificationFragment.this);
recyclerView.setLayoutManager(layoutManager);
recyclerView.setAdapter(adapter);
}
void addData(){
notificationModelArrayList = new ArrayList<>();
notificationModelArrayList.add(new NotificationModel("Event 1", "1 January 2019", "Surabaya"));
notificationModelArrayList.add(new NotificationModel("Event 2", "1 January 2019", "Surabaya"));
notificationModelArrayList.add(new NotificationModel("Event 3", "1 January 2019", "Surabaya"));
notificationModelArrayList.add(new NotificationModel("Event 4", "1 January 2019", "Surabaya"));
}
}
出现错误
RecyclerView.LayoutManager layoutManager = new LinearLayoutManager(NotificationFragment.this);
希望你能帮助我,谢谢。
最佳答案
您不能将 Fragment
转换为 Context
。
编辑这一行:
RecyclerView.LayoutManager layoutManager = new LinearLayoutManager(NotificationFragment.this);
到:
RecyclerView.LayoutManager layoutManager = new LinearLayoutManager(getContext());
或
RecyclerView.LayoutManager layoutManager = new LinearLayoutManager(getActivity());
请记住在使用前为 getContext()
或 getActivity()
检查 null。
对于下面评论中的新问题,只需将 return 语句置于函数末尾即可:
@Nullable
@Override
public View onCreateView(LayoutInflater inflater, @Nullable ViewGroup container, @Nullable Bundle savedInstanceState) {
View view = inflater.inflate(R.layout.fragment_notification,container,false);
addData();
recyclerView = (RecyclerView) view.findViewById(R.id.recycler_view);
adapter = new NotificationAdapter(notificationModelArrayList);
RecyclerView.LayoutManager layoutManager = new LinearLayoutManager(NotificationFragment.this);
recyclerView.setLayoutManager(layoutManager);
recyclerView.setAdapter(adapter);
return view;
}
关于java - LinearLayoutManager 不能在 Fragment 中使用,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/54003985/