Sample ClientModule HttpCacheInterceptors https://hackernoon.com/yet-another-mvp-article-part-3-calling-apis-using-retrofit-23757f4eee05

ClientModule.java

@Provides
@Singleton
public Cache provideCache(@Named("cacheDir") File cacheDir, @Named("cacheSize") long cacheSize) {
    Cache cache = null;

    try {
        cache = new Cache(new File(cacheDir.getPath(), HTTP_CACHE_PATH), cacheSize);
    } catch (Exception e) {
        e.printStackTrace();
    }

    return cache;
}

@Singleton
@Provides
@Named("cacheInterceptor")
public Interceptor provideCacheInterceptor(@Named("cacheMaxAge") int maxAgeMin) {
    return chain -> {
        Response response = chain.proceed(chain.request());

        CacheControl cacheControl = new CacheControl.Builder()
                .maxAge(maxAgeMin, TimeUnit.MINUTES)
                .build();

        return response.newBuilder()
                .header(CACHE_CONTROL, cacheControl.toString())
                .build();
    };
}

@Singleton
@Provides
@Named("offlineInterceptor")
public Interceptor provideOfflineCacheInterceptor(StateManager stateManager, @Named("cacheMaxStale") int maxStaleDay) {
    return chain -> {
        Request request = chain.request();

        if (!stateManager.isConnect()) {
            CacheControl cacheControl = new CacheControl.Builder()
                    .maxStale(maxStaleDay, TimeUnit.DAYS)
                    .build();

            request = request.newBuilder()
                    .cacheControl(cacheControl)
                    .build();
        }

        return chain.proceed(request);
    };
}