Other developers may refer to these same classes as something-Client. So I tend to call my classes, something-Service. Typically an app just calls a subset of the endpoints in an API. I feel this is incorrect, as an API refers to the complete set of endpoints exposed by the host for communicating with its particular software. In some developer code samples, you will see that the Retrofit interface class is labelled as something-API. We will store the JSON response in a List of Repo objects. So we will use a GET request to obtain the JSON data with the remaining half of the request “/users/ parameter using String user).Ĥ. Remember that our target endpoint is : “”. In our Retrofit Interface class above, we have done the following:Ģ. String ENDPOINT = reposForUser String user) Then we will define our interface for accessing the GitHub API. The second step is to add the permission to access the internet to your manifest file. For example, if you were interested in using Jackson or XML to parse your data, the following libraries are also available: compile '2:converter-jackson:2.1.0'Ĭompile '2:converter-simplexml:2.1.0' There are a number of other converters available with Retrofit2. The first line pulls in the Retrofit2 library and the second line is there because we are using GSON to parse the returned data in our app. To get started with using Retrofit2, we will add the following 2 lines to the app’s adle file. I have left the posts up as they do provide a good understanding of reasoning behind the use of the MVVM pattern. That and the replacement of Java with Kotlin, means the code examples shown are no longer applicable. UPDATE : Shortly after starting this series, Android development underwent a major shift with Google releasing Android Architecture Components which provided a standard boilerplate for designing Android apps. Retrofit2 is another great product from Square Open Source ( note that Retrofit2 uses OKHttp3 to make the actual network calls). We will be using the popular Retrofit2 library to handle the networking calls for our app. Now that we have defined our model, the next step is define our network calls.
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