Realizei todos os passos, mas está dando o seguinte erro:
12-28 15:51:48.725 22465-23508/br.com.caelum.agenda E/Google Maps Android API: Authorization failure. Please see https://developers.google.com/maps/documentation/android/start for how to correctly set up the map. 12-28 15:51:48.730 22465-23508/br.com.caelum.agenda E/Google Maps Android API: In the Google Developer Console (https://console.developers.google.com) 12-28 15:51:48.730 22465-23508/br.com.caelum.agenda E/Google Maps Android API: Ensure that the "Google Maps Android API v2" is enabled. 12-28 15:51:48.730 22465-23508/br.com.caelum.agenda E/Google Maps Android API: Ensure that the following Android Key exists: 12-28 15:51:48.730 22465-23508/br.com.caelum.agenda E/Google Maps Android API: API Key: AIzaSyCfpYvlJ1Vskk3WOFgheKDCoymU-WX64rk 12-28 15:51:48.730 22465-23508/br.com.caelum.agenda E/Google Maps Android API: Android Application (;): B7:7E:17:D0:D0:38:3D:7B:C7:65:9A:B9:74:D2:B5:A5:06:D1:BB:01;br.com.caelum.agenda
Estou utilizando o Android Studio 1.4