Simple Movies app , I will apply every architecture component on a separate branch with steps.

To fetch popular movies, you will use the API from themoviedb.org. If you don’t already have an account, you will need to create one in order to request an API Key.

In your request for a key, state that your usage will be for educational/non-commercial use. You will also need to provide some personal information to complete the request. Once you submit your request, you should receive your key via email shortly after.

You need to insert your API key. Go to a file named Constants.java and find the value of API_KEY. Replace "test" with "YOUR-API-KEY".

public static final String API_KEY = "YOUR-API-KEY";

In order to request popular movies you will want to request data from the /movie/popular documentation. An API Key is required. Once you obtain your key, you append it to your HTTP request as a URL parameter like so: http://api.themoviedb.org/3/movie/popular?api_key=[YOUR_API_KEY]

The Data Binding Library is a support library that allows you to bind UI components in your layouts to data sources in your app using a declarative format rather than programmatically.

• The ViewModel class is designed to separate out view data ownership from UI controller logic.
• The ViewModel class allows data to survive configuration changes such as screen rotations using LiveDate.

is an observable data holder class. Unlike a regular observable, LiveData is lifecycle-aware, meaning it respects the lifecycle of other app components, such as activities, fragments, or services. This awareness ensures LiveData only updates app component observers that are in an active lifecycle state.

Dagger is a fully static, compile-time dependency injection framework for both Java and Android. It is an adaptation of an earlier version created by Square and now maintained by Google.

Type-safe HTTP client for Android and Java by Square, Inc.

For more information please see the website.

Room provides an abstraction layer over SQLite to allow fluent database access while harnessing the full power of SQLite.

Android architecture components are a collection of libraries that help you design robust, testable, and maintainable apps. Start with classes for managing your UI component lifecycle and handling data persistence.