Question

我已经学习Android已经有3个星期的时间了，而且我已经花了一整天的时间才能克服这个问题。我用Dagger 2，Retrofit和RxJava设置了mvp项目。一切都按预期工作，但是当我发出get请求时，我得到的observable有2个空字段。

这是我要求的json（无法发布链接）gist.githubusercontent.com/TonyNikolov/89720ae547e479fb9e92c81ef4b33bef/raw/dcabde67e7fe9032cff702cc24f0cfe208b7402e/superheroes.json

但是响应可观察的是这个http：// imgur.com/a/oHxFV

如您所见，字段“imageUrl”和“secretIdentity”为空，但“name”和“id”是正确的。这适用于每个对象。

点击here for full github project

这就是我的NetModule的样子

@Module
public class NetModule {
String mBaseUrl;

public NetModule(String mBaseUrl) {
    this.mBaseUrl = mBaseUrl;
}

@Provides
@Singleton
SharedPreferences providesSharedPreferences(Application application) {
    return PreferenceManager.getDefaultSharedPreferences(application);
}

@Provides
@Singleton
Cache provideHttpCache(Application application) {
    int cacheSize = 10 * 1024 * 1024;
    Cache cache = new Cache(application.getCacheDir(), cacheSize);
    return cache;
}

@Provides
@Singleton
Gson provideGson() {
    GsonBuilder gsonBuilder = new GsonBuilder();
        gsonBuilder.setFieldNamingPolicy(FieldNamingPolicy.LOWER_CASE_WITH_UNDERSCORES);
    return gsonBuilder.create();
}

@Provides
@Singleton
OkHttpClient provideOkhttpClient(Cache cache) {
    OkHttpClient.Builder client = new OkHttpClient.Builder();
    client.cache(cache);
    return client.build();
}

@Provides
@Singleton
Retrofit provideRetrofit(Gson gson, OkHttpClient okHttpClient) {
    Retrofit retrofit = new Retrofit.Builder()
            .addConverterFactory(GsonConverterFactory.create(gson))
            .addCallAdapterFactory(RxJavaCallAdapterFactory.create())
            .baseUrl(mBaseUrl)
            .client(okHttpClient)
            .build();
    return retrofit;
}

}

这是SuperheroesListPresenter

public class SuperheroesListPresenter implements    PresenterContract.SuperheroesListPresenter {

Retrofit retrofit;
ViewContract.SuperheroesList mView;

@Inject
SuperheroesListPresenter(Retrofit retrofit, ViewContract.SuperheroesList mView) {
    this.retrofit = retrofit;
    this.mView = mView;
}


@Override
public void loadSuperheroes() {
    retrofit.create(superheroService.class).getSuperheroesList().subscribeOn(Schedulers.io())
            .observeOn(AndroidSchedulers.mainThread())
            .unsubscribeOn(Schedulers.io())
            .subscribe(new Observer<List<Superhero>>() {

                @Override
                public void onCompleted() {
                    mView.showComplete();
                }

                @Override
                public void onError(Throwable e) {
                    mView.showError(e.getMessage());
                }

                @Override
                public void onNext(List<Superhero> posts) {
                    mView.showSuperheroes(posts);
                }
            });
}


private interface superheroService {
    @GET("/TonyNikolov/89720ae547e479fb9e92c81ef4b33bef/raw/dcabde67e7fe9032cff702cc24f0cfe208b7402e/superheroes.json")
    Observable<List<Superhero>> getSuperheroesList();
}
}

这是超级英雄级

public class Superhero {

public String name;
public String imageUrl;
public String secretIdentity;
public int id;

Superhero(String name, String imageUrl, String secretIdentity, int id) {
    this.name = name;
    this.secretIdentity = secretIdentity;
    this.imageUrl = imageUrl;
    this.id = id;

}

public String getName() {
    return this.name;
}

public void setName(String name) {
    this.name = name;
}

public String getSecretIdentity() {
    return this.secretIdentity;
}

public void setSecretIdentity(String secretIdentity) {
    this.secretIdentity = secretIdentity;
}

public String getImageUrl() {
    return this.imageUrl;
}

public void setImageUrl(String imageUrl) {
    this.imageUrl = imageUrl;
}

public int getId() {
    return this.id;
}

public void setId(int id) {
    this.id = id;
}
}

我知道我应该在构造函数中使用setter，但我花了8个小时试图处理这个问题，并且我改变了很多代码试图找到问题。

Answer 1

就我而言，我有一些名为imageURL之类的字段，发现

gsonBuilder.setFieldNamingPolicy(FieldNamingPolicy.IDENTITY);

解决了这个问题。

Android RxJava / Gson / Retrofit将某些字段返回为null，否则返回null

1 个答案: