when I use log("xxx") I can see the output in the B4A logs-window.
But how is it when I use my app on a real device :
is the log command ignored on a real device or can I see the output somewhere?
(I have Galaxy a S3...and I have an option for "USB debugging"...but I think that this is not what I need...)
Basic4android Log keyword sends a message to the system logs. Search Google Play for Log Viewer. There are several apps that allow you to see the system logs from the device. All Basic4android logs are tagged with B4A.
Note that starting from Android 4.1 applications can only see their own logs.