Communicating between 2 AppInventor Apps

[ABG]

I found a working sample at

App1 that start App2 passing it some parameters

In this tutorial, which is in Spanish, App1 sends two numbers (8,4) to App2, it performs the sum 8 + 4 = 12. Returns this value 12, to App1. In this example the two applications are previously active, open. http://kio4.com/appinventor/19B_activystarter.htm [activity9] .

The calling app:

(after return)
Suma.aia (2.6 KB)

The called app:

Calcula.aia (2.9 KB)

I had trouble figuring out why the author was fiddling around with directories and files, until I realized it was for the purpose of identifying the required Package Name needed to call this app from an Activity Starter.

So aside from being in Spanish, this works.