Android apps usually interact with REST APIs, which often use JSON as a data format. We've focused almost all of our tutorials on sending JSON or XML requests, and converting JSON or XML responses. We briefly explored other data formats in our introduction to converters tutorial, but didn't go into …

Glide 4.x has introduced a new feature: the generated API. You've learned the basics of this new feature in our generated API tutorial. One upside of the generated API is that it's easy to extend. This allows you to centralize implementation patterns in your app. In this tutorial you'll …

A lot of professionally made apps use a bug tracking service, which collects errors and crashes of all users and lets us, as the developers, further improve the app by fixing the issues. The default Retrofit request callbacks offer an onFailure() method, which throws a variety of possible errors in …

In the last tutorial we've introduced Retrofit call adapters. In this tutorial, you'll benefit from learning how to implement a custom call adapter, and you'll see how to separate the onResponse callback into more useful callbacks. By the end of the tutorial, you won't need to write this boilerplate code …

In the last two years we've written 24 Picasso tutorials, which describe every little feature of Picasso. We would love to write more, but unfortunately there has been no new release of Picasso in over two years. The latest version at the time of writing is still 2.5.2. …

You've learned about the upsides of Retrofit call adapters in our introduction to call adapters. We've also mentioned that you can use provided first-party call adapters to integrate a variety of flow frameworks. In this tutorial, you'll learn how to integrate Retrofit's request callbacks into your RxJava 1.x flow. …

It's time to kick off a brand-new Retrofit topic and mini series: call adapters. In this first introductory tutorial you'll learn what call adapters are and how you can utilize them in Retrofit. {{outline}} Call Adapter Basics — What Are They? Before we can dive into call adapters, we need to …

In a previous tutorial, you've learned how to load images for a Grid- and ListView. You've upped the UI quality in the advanced ListView tutorial with the holder pattern and rounded images. Unfortunately, even with the holder pattern, a ListView can cause performance issues. Google's RecyclerView has the intention of …