How to create a Hello World app in Android Studio

What is a "Hello World!"

I have not investigated properly, but it is probably the most famous app in the world. It is just a simple program to display the string "Hello World!" on the screen.

Create a "Hello World!" App

• Start Android Studio, click the [Start a new Android Studio Project]
  
  

• Type "HelloWorldApp" to [Application name], the other as it is, and click [Next]
  
  
• Click [Next]
  

  
• To make sure that "Blank Activity" is selected, and click [Next]
  

  
• Click [Finish]
  

  

Wait a few minutes, following screen will appear.

• Build and run the app by clicking on the triangle of green at the top of the screen. 
• Click [OK]
  
  
• Wait a few minutes to start the AVD, and unlock the AVD by slide (drag-and-drop) on the screen.
  

  

App is launched, and "Hello World!" is displayed.