Using Retrofit with Cache

DetailsActivity.java

//-------

private ExampleNetwork mExampleNetwork;

private void getDetails(String id) {
    mExampleNetwork.getCachedDetails(id) // From Cache
        .doFinally(() -> {
            mExampleNetwork
              .getDetails(id) // From Network
              .subscribe(details -> onDetailsReceived(details), this::onError);
        })
        .subscribe(details -> onDetailsReceived(details), this::onError);
}

private void onDetailsReceived(Details details) {
    if (mDetails == null || !mDetails.equals(details)) { // Implement equals with your criteria
        mDetails = details;
        updateUI();
    }
}

//-------