Why AVD won't start?

Question

Android

I created a new project, changed almost nothing, except for the background color. I press run 'app', but it does not start. What's the problem?

Answer 1

I dare to suggest that you are creating a project for Android M?
update android studio to 1.3

Answer 2

Check buildToolsVersion in app/build.gradle. Should be version 22.0.1