Udacity has a good video course taught by the Android team at Google. Ignore the stuff about $200/month tutor support. All the materials are free. Edit: here's

Udacity has a good video course taught by the Android team at Google. Ignore the stuff about $200/month tutor support. All the materials are free. Edit: here's a link https://www.udacity.com/course/ud853 https://www.udacity.com/course/ud853