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Handling lists with RxJava and Retrofit in android


Handling lists with RxJava and Retrofit in android

By : user2949558
Date : November 17 2020, 01:00 AM
this one helps. RxJava has added flatMapIterable. So you don't need flattenList now. E.g.,
code :
  Observable<UserWrapper> o =
       getUserSettings()
       .doOnNext(this::saveUser)
       .flatMap(user -> getItems(user.getUserName())
                        .flatMapIterable(items -> items)
                        .flatMap(item -> getItemInfo(item.getId()))
                        .doOnNext(this::saveItem)
                        .toList()
                        .map(ignored -> user))
        .flatMap(user -> getFriends(user.getUserName())
                         .flatMapIterable(friends -> friends)
                         .doOnNext(this::saveFriend)
                         .toList()
                         .map(ignored -> user)
        );
    o.subscribe(...);


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Android rxJava Error handling with retrofit

Android rxJava Error handling with retrofit


By : user2991156
Date : March 29 2020, 07:55 AM
hope this fix your issue It looks like you may be running into an issue has been fixed as of RxJava 1.0:
TrampolineScheduler NullPointerException
Retrofit 2 + Rxjava handling error

Retrofit 2 + Rxjava handling error


By : Cordova Labs
Date : March 29 2020, 07:55 AM
will help you I found a solution, I have a application class that Creates a Retrofit and then i just created a ResponseBody and converted using responseBodyConverter(,)
code :
                @Override
                public void onError(Throwable e) {
                    if (e instanceof HttpException) {
                        ResponseBody body = ((HttpException) e).response().errorBody();

                        Converter<ResponseBody, Error> errorConverter =
                            application.getRetrofit().responseBodyConverter(Error.class, new Annotation[0]);
                    // Convert the error body into our Error type.
                        try {
                            Error error = errorConverter.convert(body);
                            Log.i("","ERROR: " + error.message);
                            mLoginView.errorText(error.message);
                        } catch (IOException e1) {
                        e1.printStackTrace();
                        }
                     }



                static class Error{
                String message;
                }
Handling different flows with RxJava and Retrofit

Handling different flows with RxJava and Retrofit


By : Abdallah Omar
Date : March 29 2020, 07:55 AM
To fix the issue you can do I use a Data wrapper class for passing things between the different layers of the application. For your case I'd have something like:
code :
public class Data<T> {

    public static final int LOADING = 0;
    public static final int SUCCESS = 1;
    public static final int NO_CHANGE = 2;
    public static final int ERROR = 3;

    public final int status;
    public final T result;
    public final DataError error;

    public Data(int status, T result, DataError error) {
        this.status = status;
        this.result = result;
        this.error = error;
    }
}
public static <R> Data<R> success(R result) {
    return new Data<>(SUCCESS, result, null);
}

public static <R> Data<R> noChange(R result) {
    return new Data<>(NO_CHANGE, result , null);
}
public Observable<Data<List<Dog>>> getAllDogs() {
    mRetrofitService.getAllDogsFromServerSide()
        .map(new Func1<Response<List<Dog>>, Data<List<Dog>>>() {
            @Override
            public Data<List<Dog>> call(Response<List<Dog>> serverSideResponse) {

                if (serverSideResponse.getCode() == 304) {
                    return Data.noChange(serverSideResponse.getBody());
                } else {
                    return Data.success(serverSideResponse.getBody());
                }
            }
        })
}
public void onNext(Data<List<Dog>> data) {

    if (result.status == SUCCESS)
        mDogDao.saveAllDogs(data.result)
        callback.showDogsOnUI(data.result);
        return;
    }

    if (result.status == NO_CHANGE) {
        callback.showDogsOnUI(data.result);
        return;
    }

    if (result.status == ERROR) {
        //...
    }
}
Android Kotlin RxJava Retrofit - Json object that has lists as attributes expected BEGIN_ARRAY but was BEGIN_OBJECT

Android Kotlin RxJava Retrofit - Json object that has lists as attributes expected BEGIN_ARRAY but was BEGIN_OBJECT


By : Satish Pati
Date : March 29 2020, 07:55 AM
I hope this helps you . If the API created by conventions than persons/{personId} should return Person object instead of list of Persons. So I assume you should replace
code :
@GET("persons/{personId}")
fun getPerson(@Path("personId") id: Int): Observable<List<Person>>
@GET("persons/{personId}")
fun getPerson(@Path("personId") id: Int): Observable<Person>
Error Handling of Rxjava in mvvm using retrofit

Error Handling of Rxjava in mvvm using retrofit


By : user3674735
Date : March 29 2020, 07:55 AM
fixed the issue. Will look into that further I am calling one api which gives Http status code 400 , man, you're asking for many questions in 1.
code :
fun getWordCountList() {
courseRepository.wordCount()?.subscribe { resource -> getWordCountLiveData().postValue(resource) }
}
.subscribe({
    successResponse -> // handle success
}, 
{ error -> // handle error
})
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