取得 MD5

keytool -list -alias androiddebugkey \
-keystore <path_to_debug_keystore>.keystore \
-storepass android -keypass android

把
<path_to_debug_keystore>.keystore
改成

Windows Vista: C:\Users\<user>\.android\debug.keystore
Windows XP: C:\Documents and Settings\<user>\.android\debug.keystore
OS X and Linux: ~/.android/debug.keystore

如我的mac
keytool -list -alias androiddebugkey -keystore ~/.android/debug.keystore -storepass android -keypass android

取得 api key
http://code.google. com/android/maps-api-signup.html
把 MD5 填入
勾選同意，點下”取得 api key ”


完成

reference:
http://code.google.com/android/add-ons/google-apis/mapkey.html