Question

我正在尝试从Firebase获取特定数据。在客户端使用REST API和Retrofit 2。

这是我在Firebase上的JSON结构：

{
"profiles" : {
"-KAG0XPBVNNF_RT55lwV" : {
  "GCMTocken" : "rtdjhsrfjt546456",
  "firstName" : "P",
  "gender" : 1,
  "lastName" : "Strongman",
  "likes" : 0,
  "nickname" : "drake1",
  "uid" : "facebook:957484"
}
}
}

请求界面：

@GET("/profiles.json")
Observable<Profile> getProfile(@Query("orderBy") String key, @Query("equalTo") String uid);

根据这个要求，我总是得到：

java.lang.IllegalArgumentException: No Retrofit annotation found. (parameter #1) 
for method FirebaseAPI.getProfile

修改

我需要这个请求：

https://incandescent-torch-4.firebaseio.com/profiles.json?orderBy="uid"&equalTo="facebook:95748485767896"

我的改造设置：

String BASE_FIREBASE_URL = "https://incandescent-torch-4.firebaseio.com";

OkHttpClient okHttpClient = new OkHttpClient.Builder()
            .addInterceptor(new HttpLoggingInterceptor().setLevel(HttpLoggingInterceptor.Level.BODY))
            .build();

    Retrofit retrofit = new Retrofit.Builder()
            .baseUrl(Constants.BASE_FIREBASE_URL)
            .client(okHttpClient)
            .addCallAdapterFactory(RxJavaCallAdapterFactory.create())
            .addConverterFactory(GsonConverterFactory.create())
            .build();
    restAPI = retrofit.create(FirebaseAPI.class);

来自RxJava的请求：

RestFirebaseClient.getInstance().getProfile(authData.getUid())
                        .subscribeOn(Schedulers.newThread())
                        .observeOn(AndroidSchedulers.mainThread())
                        .subscribe(new Subscriber<Profile>() {
                            @Override
                            public void onCompleted() {

                            }

                            @Override
                            public void onError(Throwable e) {

                            }

                            @Override
                            public void onNext(Profile profile) {

                            }
                        });

Answer 1

I observe in your code request @GET request just put "/" & make sure in you url you have to remove "/" at the end of url like - 
like this - 

Retrofit retrofit = new Retrofit.Builder()
                    .baseUrl("https://incandescent-torch-4.firebaseio.com")
                    .addConverterFactory(GsonConverterFactory.create())
                    .build();

@GET("/profiles.json")
Observable<Profile> getProfile(@Query("orderBy") String key, @Query("equalTo") String uid);

这包含在改造的documentation中。

Answer 2

向Gradle添加Retrofit 2依赖：

compile 'com.squareup.retrofit2:retrofit:2.0.0-beta3'
compile 'com.squareup.retrofit2:converter-jackson:2.0.0-beta3'
compile 'com.squareup.okhttp3:logging-interceptor:3.0.0-RC1'

初始化改造：

OkHttpClient client = new OkHttpClient.Builder()
                .addInterceptor(new HttpLoggingInterceptor()
                        .setLevel(HttpLoggingInterceptor.Level.BODY))
                .addInterceptor(new TokenInterceptor())
                .addInterceptor(new AuthenticationInterceptor())
                .build();

Retrofit retrofit = new Retrofit.Builder()
                .baseUrl("http://your_url/")
                .addConverterFactory(JacksonConverterFactory.create())
                .client(client)
                .build();

创建改造服务，例如：

import retrofit2.Call;
import retrofit2.http.GET;

public interface ProfileService {

    @GET("profile")
    Call<User> get();
}

我使用@GET("profile")，最后网址为：http://your_url/profile

您可以尝试将Observable<Profile>更改为Call<Profile>并从.json

删除@GET("profiles.json")

改造2未找到注释

2 个答案: