Retrofit has the fantastic capability of automatically mapping server responses, no matter if XML, JSON or protocol buffers, to Java objects. This is super convenient for us developers. Of course, if you want, you can always skip the mapping and work with the raw server response. However, in rare cases …

In the first Retrofit caching tutorial we've given you an overview on how caching works and what steps are necessary to enable it for Retrofit. We've skipped one important information: how can you detect whether a response came from the cache, the server, or even both? In this tutorial, you'll …

Every app developer has been in this scenario: the API has a weird or problematic behavior, but the backend developer or evil boss decides to fix it by a hack on the mobile app, instead of getting down to the root of the problem. In our introduction to response caching …

Internet servers and browsers have developed an advanced caching system to reduce the used bandwidth and make viewing websites much faster. However, when developing mobile apps we started to forget about these things. While image libraries like Picasso or Glide provide caching when loading and displaying images, Retrofit does not …

In a previous tutorial you've learned how to download files with Retrofit. Depending on the use case and size of the file, you should consider displaying a download progress to the user. Your users appreciate seeing an informative download status view, instead of being in the dark and not knowing …

In a previous tutorial, you've learned how to log requests and responses in Retrofit using an OkHttp interceptor. The interceptor is set up in a few minutes, but has the disadvantage of logging everything to the Android log, which is not the easiest way to access the complex information. In …

After publishing four tutorials specifically tailored to uploading files with Retrofit 2, we're still not done yet. In this tutorial we'll go a step further and show you how to show progress updates in the UI when the app is uploading files with Retrofit 2. This can be very useful …

In the previous Gson blog posts, we've always read and written JSON from and to fully allocated memory objects. We assumed that the application already has the entire JSON file in memory. In this blog post, we'll explore Gson's support in cases that isn't possible. Gson makes it easy to …