Consume an API, Web Service with Retrofit on Android

Tutorial to create a Pokédex app from scratch. The app uses Retrofit library to consume an API on Android. In addition to using Glide to download images.

What you'll learn

Consume an API or Web Service with Retrofit
Use a RecyclerView component in grid mode
Handle RecyclerView events

What you'll need

Know how to obtain images with Glide

Introduction

API (0:22)

pokeapi.co

Google Chrome Extension (1:10)

JSON Formatter

Images (1:47)

URL to obtain the images of the pokemon by their number.

~~https://pokeapi.co/media/sprites/pokemon/25.png~~

Update: The previous URL stopped working but you can get the image directly from the repository like this:

https://raw.githubusercontent.com/PokeAPI/sprites/master/sprites/pokemon/25.png

Pikachu is the pokemon number 25.

Retrofit

2:02: Dependency to use Retrofit in the module build.gradle

~~compile 'com.squareup.retrofit2:retrofit:2.1.0'~~

Update: compile is deprecated and there are new versions.

implementation 'com.squareup.retrofit2:retrofit:2.7.1'

Release numbers, more information and Retrofit documentation:

The Code

Repository Download

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The master branch was updated with the migration of AndroidX and the update of gradle tools. If you want to see exactly the same version of the video, it is in the video branch.