Android Question B4A BT_Printer - How to print from code module?

mmanso

Active Member
Licensed User
Longtime User
Hi all,

I'm using Star-Dust's BT_printer library to print to a bluetooth printer.

I've declared:

B4X:
Dim Printer As BT_Printer

in Main's Globals section.

Everything is working, I connect to the printer I want, all this in Main Activity.

In the same project I've a service that calls a code module that starts an HttpServer that has an Api to accept print commands from remote machines...

My question is, being that server implemented on a code module, how can I use the Printer defined on the Main activity?

Thanks.
 

Star-Dust

Expert
Licensed User
You tried passing the Printer variable as a parameter to the service.

You can also try to declare the Printer variable in the Starter service module and get it from the activity or other services
 
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mmanso

Active Member
Licensed User
Longtime User
I tried, but I get this warning from the IDE

screenshot_2020-12-19 18_26_00.png
 
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Star-Dust

Expert
Licensed User
You tried passing the Printer variable as a parameter to the service.

You can also use the Call command in the service to invoke methods of the activity where you enter printer commands.
 
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mmanso

Active Member
Licensed User
Longtime User
Thanks... didn't remember about the CallSub (I'm new to B4x).

Will follow that route.

Thanks.
 
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