The Android device as an HTTP client;
To perform network operations in your application, your manifest must include the following permissions:
<uses-permission android:name="android.permission.INTERNET" />
<uses-permission android:name="android.permission.ACCESS_NETWORK_STATE" />Both permissions are normal permissions, which means they're granted at install time and don't need to be requested at runtime.
Retrofit is a REST Client for Java and Android. It makes it relatively easy to retrieve and upload JSON (or other structured data) via a REST based web service. It also makes it relatively easy to upload files to a server.
In this course, we used the OkHttp library to perform network operations.
To do serialization and deserialization of JSON, we used the Gson library.
We used ngrok to expose our local server to the internet, so that we could test our application on a real device, using HTTPS.
Siren was used as media type for the API.
HTTP is the way modern applications network. It’s how we exchange data & media. Doing HTTP efficiently makes your stuff load faster and saves bandwidth.
OkHttp works on Android 5.0+ (API level 21+) and Java 8+.
A coroutine is a concurrency design pattern that you can use on Android to simplify code that executes asynchronously.
To use coroutines in Android, the ViewModel class has a viewModelScope property that you can use to launch coroutines. This property is a predefined CoroutineScope.
With that scope, you can launch a coroutine that runs on the main thread, and you can use the launch function to launch a coroutine that runs on a background thread.