We are the Berlin Google Developer Group (GDG) focused on Android development. Go here to join the Android Developers Group Slack team: https://adg-berlin.herokuapp.com/ Do you want to offer a presentation? form here (https://goo.gl/forms/LKVnBINiIcyeeEfy2) To contact the organizers write to gdg-berlin-android-orga@googlegroups.com . Disclaimer: GDG Berlin Android is an independent group; our activities and the opinions expressed here should in no way be linked to Google, the corporation.