"C++Builder and Delphi 10.2.3 Tokyo" are supporting mobile devices including Raspi.
Professional Edition is expensive, however Community edition can be downloaded by free.
Development software: Embacadero C++Builder/Delphi 10.2.3Tokyo Community Edition.
If you're a small company or organization without revenue (or up to $5,000 per year in revenue),
you can use the Community Edition. Serial number is sent by Email.
C++Builder and Delphi 10.2.3 works on Windows10.
It is possible to create Windows10 , OS-X , IOS and Android based GUI application.
Target OS can be easily selected by dropdown menu
GUI must be FMX Firemonkey for multiplatform.
Android Studio is no longer necessary for android development.
http://docwiki.embarcadero.com/RADStudi ... roduction
Raspi's OS must be Android things:
Android Things officially supports RaspberryPi3. This is not RTAndroid.
https://developer.android.com/things/ha ... aspberrypi
Delphi and C++Builder on Raspberry Pi & SBC.