Sample SchedulerProvider interface https://hackernoon.com/yet-another-mvp-article-part-4-rxjava-and-rxandroid-knows-how-to-response-cde42ccc4958

AppSchedulerProvider.java

package com.mirhoseini.marvel.util;

import javax.inject.Inject;

import rx.Scheduler;
import rx.android.schedulers.AndroidSchedulers;
import rx.schedulers.Schedulers;

public class AppSchedulerProvider implements SchedulerProvider {
    @Inject
    public AppSchedulerProvider() {
    }

    @Override
    public Scheduler mainThread() {
        return AndroidSchedulers.mainThread();
    }

    @Override
    public Scheduler backgroundThread() {
        return Schedulers.io();
    }
}

SchedulerProvider.java

package com.mirhoseini.marvel.util;

import rx.Scheduler;

public interface SchedulerProvider {
    
    Scheduler mainThread();
    
    Scheduler backgroundThread();
    
}