Screen: Hello World!

[Scott Ferguson]

The Screen component is the container for the app in App Inventor. It can execute blocks when the app starts, sense an orientation change of the device and display a Title for the app among other features.

In this exercise we will have the app screen display a welcome message in the title bar.

Create a new project named lrn_scn_hello.

Screen Designer:

Change Screen1's Title property to Hello World!.

Now test the project with the emulator or your connected device.

The screen should have your new title:

Challenge: Set BackgroundColor to Dark Gray. Press Ctrl+F11 in the emulator or rotate the connected device. What happens? What happens if you change the ScreenOrientation to Landscape and try to rotate the emulator or device?