Android applications are broken down into four main components: activities, services, content providers, and broadcast receivers.

What are the components of an app?

Services. Services are like invisible workers of our app. These components run at the backend, updating your data sources and Activities, triggering Notification, and also broadcast Intents. They also perform some tasks when applications are not active.

What are the key components in Android Architecture *?

Now, we will start with Android Architecture, it comprises of five levels, which are the Linux kernel, Libraries, Application framework, Android runtime, and System applications.