Copy the SDK debug certificate located in the default folder of
“C:\Documents and Settings\<username>\.android\debug.keystore” and paste in C:\ drive. Now path of the file will become “C:\debug.keystore”.
We need to extract its MD5 fingerprint using the Keytool.exe application included in JDK. This fingerprint is needed to apply for the free Google Maps key. You can usually find the Keytool.exe from the “C:\Program Files\Java\<JDK_version_number>\bin” directory.
Open Command Prompt, change your current directory using the following commands,
“cd C:\Program Files\Java\<JDK_version_number>\bin”
and type the following command in command prompt to extract the MD5 fingerprint.
keytool.exe -list -alias androiddebugkey -keystore “C:\debug.keystore” -storepass android -keypass android
Copy this MD5 certificate fingerprint. Now open the web browser and head to http://code.google.com/android/maps-api-signup.html . Follow the instructions on the page to complete the application and obtain the Google Maps API key.