为什么我的第一次网络通话失败

Question

我正在从我的服务器请求简单的数据列表。我正在使用改造，我已将 Stetho 设置为网络拦截器来监控网络调用。

正如您在 chrome 检查窗口的屏幕截图中看到的那样。我在初始网络调用后进行的每个网络调用都失败并第二次自动调用服务器并成功。这是网络调用的代码。

网络调用功能

public void getLocalAreasFromServer(int districtId) {

        APIService service = ServiceGenerator.createService(APIService.class, this);
        citiesListCall = service.getCitiesList(districtId);
        citiesListCall.enqueue(new Callback<List<CityItem>>() {
            @Override
            public void onResponse(Call<List<CityItem>> call, Response<List<CityItem>> response) {
                if (response.isSuccessful()) {
                    ArrayAdapter<CityItem> adapter = new ArrayAdapter<>(InsertAndUpdateAddressActivity.this,
                            android.R.layout.simple_spinner_dropdown_item, response.body());
                    adapter.setDropDownViewResource(android.R.layout.simple_spinner_dropdown_item);
                    localAreaSpinner.setAdapter(adapter);

                    if(hasExtra){
                        AddressTable address = getIntent().getParcelableExtra("selected_address");

                        for(CityItem cityObj: response.body()){
                            if(cityObj.getCity_name().equals(address.getLocalArea())){
                                localAreaSpinner.setSelection(adapter.getPosition(cityObj));
                            }
                        }
                    }
                }
            }

            @Override
            public void onFailure(Call<List<CityItem>> call, Throwable t) {
                t.getStackTrace();
            }
        });
    } 

API 服务接口

public interface APIService {

    @GET("get_cities_list")
    Call<List<CityItem>> getCitiesList(@Query("district_id") int district_id);

}

ServiceGenerator类

public class ServiceGenerator {

    private static final String BASE_URL = "https://www.baseURL.com/mobile/";

    private static OkHttpClient.Builder httpClient =
            new OkHttpClient.Builder()
                    .addNetworkInterceptor(new StethoInterceptor())
                    .connectTimeout(30,TimeUnit.SECONDS)
                    .readTimeout(30,TimeUnit.SECONDS)
                    .addInterceptor(new Interceptor() {
                @Override
                public Response intercept(Chain chain) throws IOException {
                    Request original = chain.request();

                    Request request = original.newBuilder()
                            .header("Authorization", "Basic cmdkZXY6cmcxMjM=")
                            .method(original.method(), original.body())
                            .build();

                    return chain.proceed(request);
                }
            });

    private static Retrofit.Builder builder =
            new Retrofit.Builder()
                    .baseUrl(BASE_URL)
                    .addConverterFactory(GsonConverterFactory.create(new GsonBuilder().serializeNulls().create()))
                    .client(httpClient.build());

    private static Retrofit retrofit = builder.build();

    public static <S> S createService(Class<S> serviceClass, Context context) {
        Stetho.initializeWithDefaults(context);
        return retrofit.create(serviceClass);
    }
}

我尝试调试，但从来没有遇到过onFailure 方法。但我可以在 Logcat 中看到以下消息，但它不是从 onFailure 打印的。

java.io.IOException: Address already in use
at android.net.LocalSocketImpl.bindLocal(Native Method)
at android.net.LocalSocketImpl.bind(LocalSocketImpl.java:306)
at android.net.LocalServerSocket.<init>(LocalServerSocket.java:48)
at com.facebook.stetho.server.LocalSocketServer.bindToSocket(LocalSocketServer.java:142)
at com.facebook.stetho.server.LocalSocketServer.listenOnAddress(LocalSocketServer.java:78)
at com.facebook.stetho.server.LocalSocketServer.run(LocalSocketServer.java:74)
at com.facebook.stetho.server.ServerManager$1.run(ServerManager.java:40)

我的应用程序运行良好，用户没有注意到这一点。但我需要知道我做错了什么。

Answer 1

该问题已在 Github here 上报告。

建议的解决方案是将 Stetho 添加到您的 Proguard 规则中：

-keep class com.facebook.stetho.**{ *; }