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Useful files in Android Studio Project

 1)The build/ folder: contains files that Android Studio creates for you. You don’t usually edit anything in this folder.

2)R file: Every Android project needs a file called R.java , which is created for you and it lives in the generated folder. Android uses it to help it keep track of resources in the app

3)The src/ folder: contains source code you write and edit.

4)The java/ folder: contains any Java code you write. Any activities you create live here.

5)res folder:You can find system resources in the res/ folder. The layout/ folder contains layouts, and the values/ folder contains resource files for values such as strings. You can get other types of resources too.

6) AndroidManifestXml:
Every Android app must include a file called AndroidManifest.xml
at its root. The manifest file contains essential information about the app, such as what components it contains, required libraries, and other declarations.

7) MainActivity.java: defines an activity. An activity tells Android how the app should interact with the user.

8) activity_main.xml: defines a layout. A layout tells Android how your app should look.

9) strings.xml: contains string id/ value pairs. It includes strings such as the application name and any default text values. Other files such as layouts and activities can look up text values from here.

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