android - 使用 JsonReader.setLenient(true) 在第 1 行第 1 列路径 $ 接受格式错误的 JSON

Question

这是什么错误？我怎样才能解决这个问题？我的应用程序正在运行，但无法加载数据。这是我的错误:使用 JsonReader.setLenient(true) 在第 1 行第 1 列路径 $

接受格式错误的 JSON

这是我的 fragment :

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.LayoutManager layoutManager = new LinearLayoutManager(getActivity().getApplicationContext());
    recyclerView.setHasFixedSize(true);
    recyclerView.setLayoutManager(layoutManager);
    data = new ArrayList<Deatails>();
    adapter = new DataAdapter(getActivity(), data);
    recyclerView.setAdapter(adapter);

    new Thread()
    {
        public void run()
        {
            getActivity().runOnUiThread(new Runnable() {
                @Override
                public void run() {
                    loadJSON();
                }
            });

        }
    }
    .start();
}

private void loadJSON() {
    if (isNetworkConnected()){

        HttpLoggingInterceptor interceptor = new HttpLoggingInterceptor();
        interceptor.setLevel(HttpLoggingInterceptor.Level.BODY);
        OkHttpClient client = new OkHttpClient.Builder()
                .addInterceptor(interceptor)
                .retryOnConnectionFailure(true)
                .connectTimeout(15, TimeUnit.SECONDS)
                .build();

        Gson gson = new GsonBuilder()
                .setLenient()
                .create();
        
        Retrofit retrofit = new Retrofit.Builder()
                .baseUrl("http://www.memaraneha.ir/")
                .client(client)
                .addConverterFactory(GsonConverterFactory.create(gson))
                .build();
        
        RequestInterface request = retrofit.create(RequestInterface.class);
        Call<JSONResponse> call = request.getJSON();
        final ProgressDialog progressDialog = new ProgressDialog(getActivity());
        progressDialog.show();
        call.enqueue(new Callback<JSONResponse>() {
            @Override
            public void onResponse(Call<JSONResponse> call, Response<JSONResponse> response) {
                progressDialog.dismiss();
                JSONResponse jsonResponse = response.body();
                data.addAll(Arrays.asList(jsonResponse.getAndroid()));
                adapter.notifyDataSetChanged();
            }
            @Override
            public void onFailure(Call<JSONResponse> call, Throwable t) {
                progressDialog.dismiss();
                Log.d("Error", t.getMessage());
            }
        });
    }
    else {
        Toast.makeText(getActivity().getApplicationContext(), "Internet is disconnected", Toast.LENGTH_LONG).show();}
}
private boolean isNetworkConnected() {
    ConnectivityManager cm = (ConnectivityManager) getActivity().getSystemService(Context.CONNECTIVITY_SERVICE);
    NetworkInfo ni = cm.getActiveNetworkInfo();
    if (ni == null) {
        // There are no active networks.
        return false;
    } else
        return true;
}
}

请求接口(interface):

public interface RequestInterface {

@GET("Erfan/news.php")
Call<JSONResponse> getJSON();
}

更新(阅读下面的文字并找到您的问题)

• 大多数时候，此错误与您的 json 无关，但可能是 不正确的 http 请求，例如缺少或不正确的 header ，首先使用 postman 检查您的请求以验证服务器响应和服务器响应 header 。如果没有问题，则错误主要来自您编写的 http 请求，也可能是因为服务器响应不是 json(在某些情况下响应可能是 html)。

Answer 1

这是一个众所周知的问题，基于 this回答你可以添加 setLenient:

Gson gson = new GsonBuilder()
        .setLenient()
        .create();

Retrofit retrofit = new Retrofit.Builder()
        .baseUrl(BASE_URL)
        .client(client)
        .addConverterFactory(GsonConverterFactory.create(gson))
        .build();

现在，如果您将其添加到您的 retrofit，它会给您另一个错误:

com.google.gson.JsonSyntaxException: java.lang.IllegalStateException: Expected BEGIN_OBJECT but was STRING at line 1 column 1 path $

这是另一个众所周知的错误，您可以找到答案 here (此错误表示您的服务器响应格式不正确)；所以改变服务器响应以返回一些东西:

{
    android:[
        { ver:"1.5", name:"Cupcace", api:"Api Level 3" }
        ...
    ]
}

为了更好地理解，请将您的回复与 Github api 进行比较.

建议:要了解您的 request/response 发生了什么，请在 retrofit 中添加 HttpLoggingInterceptor。

基于 this回答您的 ServiceHelper 将是:

private ServiceHelper() {
        httpClient = new OkHttpClient.Builder();
        HttpLoggingInterceptor interceptor = new HttpLoggingInterceptor();
        interceptor.setLevel(HttpLoggingInterceptor.Level.BODY);
        httpClient.interceptors().add(interceptor);
        Retrofit retrofit = createAdapter().build();
        service = retrofit.create(IService.class);
    }

另外别忘了补充:

compile 'com.squareup.okhttp3:logging-interceptor:3.3.1'