I haven’t seen anyone from App Inventor manage this before, which is why I’m posting this.
Insert your textboxes
Set ‘MultiLine’ to true
Insert a Clock component.
Set the following properties for the clock
Instead of going to the next TextBox you could also replace ‘Call TextBox.RequestFocus’ to your own procedure.
AIA File: KeyboardTest.aia (2.1 KB)
APK File: KeyboardTest.apk (2.1 MB)