One frustrating element of our work life as Android developers is that we're often dependent of APIs. APIs can be unfinished, broken, or just slow, which all stall app development. It can be frustrating if we're trying to polish some UI elements, but cannot finish the work because of an …

We've tailored our 80+ tutorials on Retrofit to the Android platform. The snippets and examples are usually specifically written for Android apps. But that doesn't do Retrofit justice. Retrofit supports any regular Java project, not just on the Android platform. Even though you can implement the vast majority of our …

In the past weeks, you read an introduction to Retrofit call adapters and how to integrate various first-party call adapters (RxJava 1.x, RxJava 2.x, Guava). In another tutorial, you've learned how to implement a custom call adapter. In that tutorial, you implemented a custom call adapter, which separates …

Call adapters are a powerful tool for Retrofit developers. You've learned the basics of Retrofit call adapters in our introduction to call adapters tutorial. We've also published a tutorial on how to integrate RxJava 1.x flow interfaces to your Retrofit callbacks. In this tutorial, you'll learn how to integrate …

Retrofit is mainly used to interact with well-defined REST APIs. Nevertheless, you can also use Retrofit to crawl HTML sources of websites. In this tutorial, you'll explore how to utilize jspoon and Retrofit to automatically extract content from Wikipedia. In a practical example you'll understand the basic functionality of jspoon …

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 …

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 …