In this blog post of our Retrofit launch sequence we'll show you one of the most requested topics: how to download files. We'll give you all the insight and snippets you need to use Retrofit to download everything, from tiny .png's to large .zip files. If this is your first …

Retrofit 2 finally comes with an additional annotation for dynamic urls. What was a hackaround in Retrofit 1 is now just a single @Url annotation for the endpoint declaration. This post will show you how to make use of dynamic endpoint urls for individual requests. {{video}} {{outline}} Use-Case Scenarios There …

Adding request parameters can be kind of pain in the a** if your service methods allows multiple query parameters which also can be optional. We’ve published an article describing how to use optional query parameters. Today, we’re going to simplify the handling of multiple query parameters by introducing …

Adding query parameters to single requests is straight forward. You’re using the @Query annotation for your parameter declaration within the interface methods. This tells Retrofit to translate the provided query parameter name and value to the request and append the fields to the url. Recently, we’ve been asked …

You’ve already learned how to add custom request header using Retrofit. This post specifically touches the details on adding request headers using Retrofit 2 and the OkHttp interceptor. Interceptors are a good way to statically change requests executed with the specific service client which has the interceptor assigned. {{outline} …

There are multiple ways to send data from your client to a server. This post continues the first article on how to use form-urlencoded requests with Retrofit to transmit data with your request. If the API you’re going to request accepts a simple JSON payload for processing, this approach …

Multiple methods exist to send data to your server. You may already know how to send data within the request body or how to make use of multipart/form-data to upload files using Retrofit. If not and you’re interested, follow the lead :) There’s another type available to send …

Last week we’ve learned about CoreOS’ components and technologies within the ecosystem. This week, we’re directly diving into the practical part and get our hands dirty. If you read the first post, you already know that CoreOS is an operating system geared towards high-availability. Setting up a cluster …