This Odoo Flutter Backend is a simple example of a book store back-end with Odoo for a flutter app with an API controller.
http://localhost:8080/api/books{ "success":true, "data":[ { "name":"Book name", "description":"dfsdf", "state":"draft", "publish_date":"2020-05-18", "language":"en", "isbn":"23234324", "price":20.0, "author":"Ahmed", "publisher":"Dar", "categories":[ "Arabic / \u0627\u0644\u0652\u0639\u064e\u0631\u064e\u0628\u064a\u0651\u0629" ] } ] }