Tools every Android developer must know by heart Series

#1 Retrofit

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1. Retrofit — https://square.github.io/retrofit/

Developed by square Retrofit is a type-safe HTTP client for Android and Java.
It allows developers to develop API requests in a simplified way.

Through annotations a developer can describe there HTTP requests:

• URL parameter replacement and query parameter support
• Object conversion to request body (e.g., JSON, protocol buffers)
• Multipart request body and file upload

Components

1. Request method

Every method must have an HTTP annotation that provides the request method and relative URL. There are eight built-in annotations: HTTP, GET, POST, PUT, PATCH, DELETE, OPTIONS and HEAD.

@GET("users/list")

@POST("users/updateProfile")

2. URL manipulation

A request URL can be updated dynamically using replacement blocks and parameters on the method. A replacement block is an alphanumeric string surrounded by { and }. A corresponding parameter must be annotated with @Path using the same string.

@GET("group/{id}/profile")
Call<List<User>> groupList(@Path("id") int groupId)…