which component are necessary for a new Android Project?

components are important for a new Android project

App components are the essential building blocks of Android applications. Every component is an entry point through which the system or a user can enter your app. Some components rely upon others.
There are four different types of app components:

• Activities: An activity is the entry point for communicating with the user. It represents a single screen with a user interface.


• Services: A service is a general-purpose entry point for having an app running in the background for all kinds of purposes. It is a component that runs in the background to execute long-running transactions or to perform work for remote processes.


• Broadcast receivers: A broadcast receiver is a component that facilitates the system to deliver events to the app outside of a regular user flow, allowing the app to respond to system-wide broadcast announcements.


• Content providers: A content provider manages a shared set of app data that you can store in the file system, on the web, in a SQLite database, or on any other persistent storage location that your app can access. 

Each type serves a different purpose and has a different life cycle that determines how the component is created and destroyed.

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components are important for a new Android project

Hey! Here you can read all the essential building blocks and components. 

https://www.javatpoint.com/android-core-building-blocks