Steps to Get Api key for Google Maps - Android

1)Find your debug.keystore location of Android.
Window --> Preferences --> Android --> Build 
Then See Default Debug keystore ( debug keystore location)

2)Open your commandprompt
(Start--> run --> cmd --> )

3)Type following code
keytool -list -alias androiddebugkey -ke
ystore "C:\Documents and Settings\Administrator\.android\debug.keystore" -storepass android -keypass android

4)Then key will be displayed like this
androiddebugkey, Nov 22, 2012, PrivateKeyEntry,
Certificate fingerprint (MD5): 25:48:65:B4:79:39:B9:C1:81:2A:28:59:C2:C0:98:7A

5)Open your Browser type this URL.
developers.google.com/maps/documentation/android/v1/maps-api-signup

6)Then Open that page .Accept the Conditions and Paste your MD5 Key(25:48:65:B4:79:39:B9:C1:81:2A:28:59:C2:C0:98:7A)
Click Generate API Key button.

7)It asks to SignUp the Gmail Account.So Sign Up.Then We gain the Maps API key