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RxJava may be a data-focused library, but its definition of “data” is pretty broad and includes things like variables, caches, properties, and even user input events such as clicks and swipes.

This approach typically results in more concise, human-readable code that’s easier to maintain and less prone to errors. RxJava lets you describe what you want to achieve, rather than writing a list of instructions for your application to work through.

There are many benefits to using RxJava in your Android projects, but some of the most important include: RxJava is an open-source, JVM-compatible implementation of the ReactiveX library that’s designed to help you work with asynchronous streams of data in a reactive programming style, and without having to write a ton of callbacks.

An API interface. This is where you describe each Retrofit request that you want to make.īy the end of this tutorial, you’ll have a project that looks something like this: Why Should I Use RxJava for My API Calls?.

A data class. This class represents the responses for each of your app’s API calls.

A Retrofit class. This is where you’ll create a Retrofit instance, add a converter (we’ll be using Gson), and then specify the base URL that your app should use for all of its HTTP requests.

To issue a Retrofit request, we’ll need to create the following: I’ll then use a RecyclerView to display this information in our app. There's no shortage of APIs out there, but to help keep things straightforward, we’ll be using the free Nomics Cryptocurrency & Bitcoin API to retrieve a list of cryptocurrencies and their market prices for the last recorded trade. Conveniently, you can do all of these things with the RxJava library, so we’ll be using Retrofit and RxJava side by side in our project.īy the end of this article, you’ll have created an app that retrieves data from a remote API using Retrofit, converts that data into RxJava’s Observable format, and then manipulates that data using a selection of RxJava and RxAndroid operators and schedulers. Once you’ve retrieved some data, you’ll want to put it to good use! In Android, this often involves forwarding the data to Android’s all-important main UI thread, ready to display in your app’s UI, or transforming the data in some way, such as filtering or combining it.

In this article, I’ll show you how to retrieve data from a remote API, using Retrofit and the free Nomics Cryptocurrency & Bitcoin API. Whether it’s checking for new emails using the Gmail API, searching for events in the local area with the Ticketmaster API, or leveraging the user’s Spotify history to recommend new music, APIs (usually REST APIs) provide access to a wealth of information that you can use in your app.Ĭommunicating with remote servers has become such an important part of modern mobile development that there are countless libraries dedicated to helping you make network calls, but Retrofit is one of the most widely used networking libraries for Android. Today, it’s pretty common for mobile apps to exchange data with remote servers, using web Application Programming Interfaces (APIs).

#Finance toolbar api key code#

#Finance toolbar api key android#

#Finance toolbar api key how to#