3. Hello World Android Application

3. Hello World Android Application

Let's start our first android app. Click on Android studio icon in your android studio bin folder. You will get below screen.

Now, Click on ‘Start a new Android Studio Project’.

Give your application name and package name and click on next button.

Select form factors as per your requirement and click on next button. It will install requested components and will navigate you to add activity window.

As of now, Just select ‘Empty activity’ and click on next button.

Customize the activity name and layout name as per your wish and click on finish button, it will show you default project structure.

When you run this on virtual device, you will see it as shown below:

Project structure details:

java:

This contains the .java source files for your project.

gen:

contains the .R file, a compiler-generated file that references all the resources found in your project. You should not modify this file.

res/drawable-hdpi

This is a directory for drawable objects that are designed for high-density screens.

res/layout

This is a directory for files that define your app's user interface.

res/values

This is a directory for other various XML files that contain a collection of resources, such as strings and colors definitions.

AndroidManifest.xml

This is the manifest file which describes the fundamental characteristics of the app and defines each of its components.   

Happy Learning!!!