Use the ActivityStarter to display two locations like this Rudi.
Your ActivityStarter is missing several AS blocks (unless you set them in the Properties) .
Make sure you have meaningful data in the Blat1 and Blon1 TinyDB tags. If you have no data, the ActivityStarter uses a blank for the value and that will not work.
Also make sure the Labels are populated with valid data before you use your B11 Button.Click.
This routine will not work if you are not connected to WIFI or a network.
Regards,
Steve
Also make sure you are not using the Emulator. The Eumulator will not display an ActivityStarter map.
Regards,
Steve