Question

让app从服务器获取图像和文本然后在卡片视图中显示并有另一个应用程序具有不同的选项卡和哪些选项卡从Fragment扩展

所以想把我的第一个应用程序放在哪个第二个应用程序选项卡中。像这样：

所以粘贴我的主要活动代码来自片段中的第一个应用程序，但有错误：

public class news extends Fragment {

    private RecyclerView recyclerView;
    private ArrayList<Deatails> data;
    private DataAdapter adapter;


    private View myFragmentView;
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {

    myFragmentView= inflater.inflate(R.layout.news, container, false);
      initViews();
    return myFragmentView;
}

    private void initViews() {

        recyclerView = (RecyclerView)myFragmentView.findViewById(R.id.card_recycler_view);
        recyclerView.setHasFixedSize(true);
        RecyclerView.LayoutManager layoutManager = new LinearLayoutManager(getApplicationContext());
        recyclerView.setLayoutManager(layoutManager);
        loadJSON();
    }

    private void loadJSON() {

            Retrofit retrofit = new Retrofit.Builder()
                    .baseUrl("http://memaraneha.ir/")
                    .addConverterFactory(GsonConverterFactory.create())
                    .build();
            RequestInterface request = retrofit.create(RequestInterface.class);
            Call<JSONResponse> call = request.getJSON();

            final ProgressDialog progressDialog = new ProgressDialog(this);
            progressDialog.show();

            call.enqueue(new Callback<JSONResponse>() {
                @Override
                public void onResponse(Call<JSONResponse> call, Response<JSONResponse> response) {
                    progressDialog.dismiss();

                    JSONResponse jsonResponse = response.body();
                    data = new ArrayList<>(Arrays.asList(jsonResponse.getAndroid()));
                    adapter = new DataAdapter(MainActivity.this, data);
                    recyclerView.setAdapter(adapter);
                }

                @Override
                public void onFailure(Call<JSONResponse> call, Throwable t) {
                    progressDialog.dismiss();
                    Log.d("Error", t.getMessage());
                }
            });
    }
}

这是我的错误：

,,,,

Answer 1

您应该使用<section class="Sidebar"> <h1 class="HeadOne">Name</h1> <ul> <li> <a href="file:///C:/Users/hen/Desktop/Camp/assignments/Basic-Portfolio/portfolio.html">Portfolio</a>  </li> <li> <a class="contact" href="file:///C:/Users/hen/Desktop/Camp/assignments/Basic-Portfolio/contact.html">Contact</a> </li> <li> <a class="blue" href="file:///C:/Users/hen/Desktop/Camp/assignments/Basic-Portfolio/index.html">About</a> </li> </ul> </section> <section class="main"> <div class="mainDiv"> <h1 class="mainDivH1">About Me</h1> <img id="Profile" src="assets/images/PortfolioPicture.jpg" alt="Mad Hatter" /> <p>Content.....</p> <p class="p2">Content.....</p> </div> <div class="DivConnect"> <h2 class="ConnectHeader"> Connect with Me </h2> <ol class="ConnectList"> <li class="connectLI"> <a href="https://www.facebook.com/" target="_blank"> <img id="facebook" src="assets/images/1474864409_facebook.png" alt="face" /> </a> </li> <li class="connectLI"> <a href="https://twitter.com/?lang=en" target="_blank"> <img id="twitter" src="assets/images/1474864502_Twitter_icon.png" alt="twitt" /> </a> </li> <li class="connectLI"> <a href="https://www.linkedin.com/" target="_blank"> <img id="linked" src="assets/images/1474864458_linkedin_circle_black.png" alt="linkedin" /> </a> </li> </ol> </div> </section> <footer class=f oot> © Copyright 2016 Anonymous </footer>内的View链接。

内部片段

Fragment

您不能只将活动中的粘贴代码复制到您的片段中。您需要从片段视图中启动findViewById。

private View myFragmentView;

    @Override
    public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
    myFragmentView = inflater.inflate(R.layout.news, container, false);
    return myFragmentView;
}

您无法在片段的myFragmentView.findViewById(R.id.addYourViewHere);方法之前运行init方法。

Answer 2

当您使用片段时，您必须覆盖它的onCreateView方法。

示例：

public class FavFragment extends Fragment {

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

    mRecyclerView = (RecyclerView) v.findViewById(R.id.my_recycler_view);
    layoutEmpty = (RelativeLayout) v.findViewById(R.id.layoutEmpty);
    btnShowOnMap = (FloatingActionButton) v.findViewById(R.id.btnShowOnMap);
    fabRoulette = (FloatingActionButton) v.findViewById(R.id.fabRoulette);
    mainView = v.findViewById(R.id.mainView);


    return v;
}

Answer 3

我解决了我的问题所以它正确的代码为人们所用：

Parent.a_value

片段不起作用并且有错误

3 个答案: