Best website to learn android development with examples. This site having a lot of examples on material design, jetpack, and recyclerview,kotlin.
Retrofit is an awesome type-safe HTTP client for Android and Java built by awesome folks at Square. Retrofit makes it easy to consume JSON or XML data which is parsed into Plain Old Java Objects (POJOs). Retrofit 2 by default leverages OkHttp as the networking layer and is built on top of it.