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android - 将数据从活动传递到片段时应用程序崩溃

问题描述

我正在努力将 recyclerview 项目从活动传递到片段，我发现 Bundle 对此很有用，但是在我的片段中，当我尝试检索数据时，应用程序崩溃了，那么我该如何解决呢？

这是我发送数据的活动文件代码

            Bundle bundle = new Bundle();
            bundle.putString("title", title.getText().toString());
            bundle.putString("description", 
            description.getText().toString());
            bundle.putString("date", date.getText().toString());

            UpdatesActivity updatesActivity = new UpdatesActivity();
            updatesActivity.setArguments(bundle);

这是我的片段活动（名为 UpdatesActivity）

private List<Info> infoList = new ArrayList<>();
private InfoAdapter mAdapter;
private Button btnLogOut;
private FirebaseAuth firebaseAuth;
private String title, description, date;

public UpdatesActivity() {
    // Required empty public constructor
}

@Override
public void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
}
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
                         Bundle savedInstanceState) {
    View view = inflater.inflate(R.layout.fragment_updates, container, false);

    RecyclerView recyclerView = (RecyclerView) view.findViewById(R.id.recycler_view);

    title = getArguments().getString("title");
    description = getArguments().getString("description");
    date = getArguments().getString("date");

    mAdapter = new InfoAdapter(infoList);
    recyclerView.setLayoutManager(new LinearLayoutManager(getActivity()));
    recyclerView.setItemAnimator(new DefaultItemAnimator());
    recyclerView.addItemDecoration(new DividerItemDecoration(getActivity(), LinearLayoutManager.VERTICAL));
    recyclerView.setAdapter(mAdapter);

    return view;
    }
}

现在，当我删除用于检索标题、描述和日期的行时，应用程序运行良好，但添加它们时应用程序崩溃。

标签： androidandroid-studioandroid-fragmentsandroid-activity

解决方案

你可以使用这个方法

 private void loadFragment(Fragment fragment) {
        Bundle bundle = new Bundle();
        bundle.putString("title", title.getText().toString());
        bundle.putString("description",
                description.getText().toString());
        bundle.putString("date", date.getText().toString());
        fragment.setArguments(bundle);
        FragmentManager fm = getSupportFragmentManager();
        FragmentTransaction fragmentTransaction = fm.beginTransaction();
        fragmentTransaction.replace(R.id.fragmentContainer, fragment);
        fragmentTransaction.commit(); // save the changes

    }

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