Android MVP with two fragments sharing the same data

Question

My app has one activity and two fragments. The activity is just used as a fragment container. One of the fragment show data as text. The second fragment shows the same data as a chart. This data come from a remote JSON API. As in MVP we have to replicate the same structure for each view (module, model, presenter, repository...) my app request the data from the JSON API for every fragment, so two times. How can i do to have a more efficient architecture allowing me to respect the MVP ?

See below the code implemented for my both fragments :

Module

@Module
public class PollutionLevelsModule {
    @Provides
        public PollutionLevelsFragmentMVP.Presenter providePollutionLevelsFragmentPresenter(PollutionLevelsFragmentMVP.Model pollutionLevelsModel) {
        return new PollutionLevelsPresenter(pollutionLevelsModel);
    }

    @Provides
    public PollutionLevelsFragmentMVP.Model providePollutionLevelsFragmentModel(Repository repository) {
        return new PollutionLevelsModel(repository);
    }

    @Singleton
    @Provides
    public Repository provideRepo(PollutionApiService pollutionApiService) {
        return new PollutionLevelsRepository(pollutionApiService);
    }
}

Repository

public class PollutionLevelsRepository implements Repository {
    private PollutionApiService pollutionApiService;

    public PollutionLevelsRepository(PollutionApiService pollutionApiService) {
        this.pollutionApiService = pollutionApiService;
    }

    @Override
    public Observable<Aqicn> getDataFromNetwork(String city, String authToken) {
        Observable<Aqicn> aqicn = pollutionApiService.getPollutionObservable(city, authToken);

        return aqicn;
    }
}

http://stackoverflow.com/questions/34257883/mvp-for-activity-with-multiple-fragments?rq=1 — Manish, Apr 17 '17 at 09:14

score 3 · Accepted Answer · answered Apr 17 '17 at 08:43

3

You must use MVP inside your activity so that only one time request is done to JSON API.After that all fragments which register from that activity can able to get that.

answered Apr 17 '17 at 08:43

Jitesh Mohite

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Thank you. So I get the data from the API in my MVP structured activity and send this retrieved data to my both fragments using a Bundle, right ? – Laurent Apr 17 '17 at 09:15
yes, you are right.Other solution is that you can call the method of activity from fragment also to get the response. By both ways it will work fine. – Jitesh Mohite Apr 17 '17 at 09:18
pleased to help you. – Jitesh Mohite Apr 17 '17 at 09:29

Android MVP with two fragments sharing the same data

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