You probably need to request API key from Google for your signing certificate.
Can you explain more
and thanks in advance
When you build an app, it's signed with a certificate. Google Maps use that certificate for API key, so you need to add that key and certificate to Google API Console to be able to use the map. More info here:
https://developers.google.com/maps/documentation/android-api/signup
Thank you very much for help, it work now.
its posible load openstreetmaps in traccar manager ??
Please search before asking a question:
https://github.com/tananaev/traccar-manager-android/issues/29
Hello,
If any one can help me with my problem. When I build an Apk directly from the source code with no change to the code, the map doesn't work. But the officiel Apk work just fine.