Errore calcolo tra due orari temporali

Nicola_Imperati · January 9, 2026, 9:03pm

Hi everyone,
I basically want to calculate the difference between two times in terms of hours and minutes, but I can't figure out where I'm going wrong.
Regards
Nicola

TIMAI2 · January 9, 2026, 9:44pm

Here is one way to do it

Nicola_Imperati · January 9, 2026, 10:10pm

I haven't quite figured out your mathematical procedure. However, I wanted to choose the start and end times using the Time Picker.

ewpatton · January 9, 2026, 10:10pm

What version of Android are you running?

TIMAI2 · January 9, 2026, 10:15pm

Nicola_Imperati · January 9, 2026, 10:15pm

Version 15

ewpatton · January 9, 2026, 10:18pm

Hmm..... So the stack trace in your screenshot doesn't include anything related specifically to App Inventor. By chance can you share this AIA with me?

Nicola_Imperati · January 9, 2026, 11:28pm

It still gives me the same error as before

TIMAI2 · January 9, 2026, 11:38pm

Does it happen when you set the first timepicker ?