Retrofit2

Every method of an interface represents one possible API call.

A Retrofit 2 Converter. Factory for Kotlin serialization. Add a converter factory when building your Retrofit instance using the asConverterFactory extension function:. Response body types e. Because Kotlin serialization is so flexible in the types it supports, these converters assume that they can handle all types. If you are mixing this converter with another, you must add this instance last to allow the other converters a chance to see their types.

Retrofit2

The Retrofit class generates an implementation of the GitHubService interface. The relative URL of the resource is specified in the annotation. A request URL can be updated dynamically using replacement blocks and parameters on the method. A corresponding parameter must be annotated with Path using the same string. The object will also be converted using a converter specified on the Retrofit instance. If no converter is added, only RequestBody can be used. Form-encoded data is sent when FormUrlEncoded is present on the method. Each key-value pair is annotated with Field containing the name and the object providing the value. Multipart requests are used when Multipart is present on the method. Parts are declared using the Part annotation. Multipart parts use one of Retrofit 's converters or they can implement RequestBody to handle their own serialization.

A DialogFragment is used to enter the credentials for authentication, retrofit2. The source code to retrofit2 Retrofit, its samples, and this website is available on GitHub.

All rights reserved. Skip navigation links. Uses of Package retrofit2. An invocation of a Retrofit method that sends a request to a webserver and returns a response. Adapts a Call with response type R into the type of T. Creates CallAdapter instances based on the return type of the service interface methods. Creates Converter instances based on a type and target usage.

Additionally, it provides functionality for multipart request body and file uploads. Now we can build the interface for the API that will actually fetch the data from the server. Now we will make a little wrapper class for our API to keep the Retrofit initialization code wrapped up nicely. Calling enqueue tells Retrofit to make that call on a background thread and return the result to the callback that we're creating here. However, you don't need your own model class.

Retrofit2

Calls may be executed synchronously with execute , or asynchronously with enqueue retrofit2. In either case the call can be canceled at any time with cancel. A call that is busy writing its request or reading its response may receive a IOException ; this is working as designed.

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Six sibling modules adapt popular serialization libraries for your convenience. This exercise assumes that you are familiar with Gradle and Buildship for Eclipse. The above method only adds the credentials, if you request your user details. A request URL can be updated dynamically using replacement blocks and parameters on the method. The Retrofit class generates an implementation of the GitHubService interface. As you can see here , the owner of a repository is a separate JSON object within the repository response and therefore it normally needs a corresponding Java class for de serialization. If the value is null, the header will be omitted. Releases 1 1. You may again noticed the usage of the Credentials class for Basic authentication. The relative URL of the resource is specified in the annotation. So does the request to get the user details. Because Kotlin serialization is so flexible in the types it supports, these converters assume that they can handle all types. That means, that they have no enclosing element and are listed one after another within the XML response. Bundle ; import android.

It's time to kick off a brand-new Retrofit topic and mini series: call adapters.

When submitting code, please make every effort to follow existing conventions and style in order to keep the code as readable as possible. The object will also be converted using a converter specified on the Retrofit instance. If you would like to contribute code you can do so through GitHub by forking the repository and sending a pull request. You signed in with another tab or window. Create the following two data classes called GithubIssue and GithubRepo. Several converters are already available for various serialization formats. Create a class with a main -method to start the controller. An invocation of a Retrofit method that sends a request to a webserver and returns a response. To handle the authentication for every call, add a Interceptor to the OkHttpClient. In dept blog series about Retrofit. A corresponding parameter must be annotated with Path using the same string. POST ; import retrofit2. In this exercise you use the Retrofit REST library to query StackOverflow for questions based on tags The implementation also allows to the answers to posted questions.