Retrofit2 dont send request (no logging with OkHttp)

Question

I'm trying to use Retrofit2 with RxJava2, here is Api:

public class App extends Application {

    final String SERVER_ENDPOINT = "https://api.vk.com";

    private Retrofit mRetrofit;
    private static ImageService mImageService;
    HttpLoggingInterceptor httpLoggingInterceptor;

    @Override
    public void onCreate() {

        super.onCreate();
        httpLoggingInterceptor = new HttpLoggingInterceptor();
        httpLoggingInterceptor.setLevel(HttpLoggingInterceptor.Level.BODY);
        OkHttpClient okHttpClient = createClient();
        mRetrofit = new Retrofit.Builder()
                .baseUrl(SERVER_ENDPOINT)
                .client(okHttpClient)
                .addConverterFactory(GsonConverterFactory.create())
                .addCallAdapterFactory(RxJava2CallAdapterFactory.create())
                .build();
        mImageService = mRetrofit.create(ImageService.class);
    }

    private OkHttpClient createClient() {

        OkHttpClient.Builder builder = new OkHttpClient.Builder();
        builder.addInterceptor(httpLoggingInterceptor);
        return builder.build();
    }

    public static ImageService getImageService() {

        return mImageService;
    }
}

That is service interface:

public interface ImageService {

    @GET("/method/photos.get")
    Observable<GetPhotoResponse> getImages(
            @Query("owner_id") int owner_id,
            @Query("album_id") String album_id,
            @Query("count") int count,
            @Query("v") String version);
}

When I'm calling method getImages(), no OkHttp logging appears in logcat. And pictures dont downloading to the imageviews

There is gradle.build:

//RxJava2
    compile "io.reactivex.rxjava2:rxjava:2.1.0"
    //Retrofit2
    compile 'com.squareup.retrofit2:retrofit:2.2.0'
    compile 'com.squareup.retrofit2:adapter-rxjava2:2.2.0'
    compile 'com.squareup.retrofit2:converter-gson:2.2.0'
    //Okhttp
    compile 'com.squareup.okhttp3:okhttp:3.6.0'
    compile 'com.squareup.okhttp3:logging-interceptor:3.6.0'
    //Glide
    compile 'com.github.bumptech.glide:glide:3.7.0'
    //Gson
    compile 'com.google.code.gson:gson:2.7'
    //RecyclerView
    compile 'com.android.support:recyclerview-v7:25.3.0'

What's wrong with it?? Need help!

The code, where I call method in Interactor:

public Observable<GetPhotoResponse> downloadImages() {

        Log.d("tag", "downloadImages: ");
        return downloadImagesFromVK()
                .doOnNext(getPhotoResponse -> {
                    Log.d("tag", "downloadImages: YESSS");
                })
                .doOnComplete(() -> {
                    Log.d("tag", "downloadImages: COMPLETE");
                })
                .doOnError(throwable -> {
                    Log.d("tag", "downloadImages: ERROR");
                });
    }

    public Observable<GetPhotoResponse> downloadImagesFromVK() {

        return imageService.getImages(
                VkConstants.OWNER_ID,
                VkConstants.ALBUM_ID,
                VkConstants.COUNT,
                VkConstants.VK_API_VERSION);
    }

Presenter:

public void startDownloadImages() {

        mMainView.showProgressBar();

        mInteractor.downloadImages()
                .doOnNext(getPhotoResponse -> {
                    mMainView.setImagesToView(mInteractor
                            .getUrlsListMaxSize(getPhotoResponse));
                })
                .doOnError(throwable -> mMainView.showConnectionProblemError());
    }

when I run the app, only "downloadImages: " appears in logcat — Koroqe, May 02 '17 at 22:46

score 3 · Accepted Answer · answered May 02 '17 at 23:47

doOnNext and doOnError are side effects of your subscription, that still needs to happen. The chain returns an Observable that needs to be subscribed.

Try to replace your code with something like

mInteractor.downloadImages()
                .subscribeOn(Schedulers.io())
                .observeOn(AndroidSchedulers.mainThread())
                .subscribe(getPhotoResponse -> {
                    mMainView.setImagesToView(mInteractor
                            .getUrlsListMaxSize(getPhotoResponse));
                }, e -> mMainView.showConnectionProblemError());

`

The subscription is where the magic happens and the observable is triggered to do its stuff.

Retrofit2 dont send request (no logging with OkHttp)

1 Answers1