Part of Android Development - ISMIN

Course followed by students of Mines St Etienne, ISMIN - M2 Computer Science.

TP5: HTTP Requests

📝 Goal

The goal is to link the app to a Rest API using Retrofit:

You can either use:

• your own Book Rest API
• a generic one accessible on: https://bookshelf-gme.cleverapps.io/books

Preparatory work:

• Copy everything from previous TP (except the README)

First:

• Add retrofit dependencies (see course slides) to build.gradle
• Add internet permission in AndroidManifest

Then:

• Create a BookService interface

• Add a getAllBooks function with annotations matching the API

• Create an instance of retrofit and instantiate BookService with it in MainActivity

• Call getAllBooks in the onCreate function and display the books returned by the server

• Add a createBook function with annotations matching the API

• Call createBook to post a new book to the server and then display the list of books (including the freshly created one)

Finally:

• Add some Toasts to properly display and handle network errors

🚀 Getting Started

• Start Android Studio
• Select Open an existing Android Studio project and pick this directory

That's it! You can code!