Android Exception MapActivity: Couldn't get connection factory client

For using Map,things you need to Keep in mind :

1.Add internet permission in Manifest file

    <uses-permission android:name="android.permission.INTERNET" />

2.Add Library code in Manifest file :

 <uses-library android:name="com.google.android.maps" /> 

1. Extend Map Activity instead of Activity also ensure that your SDK is Google not Android

2. Then generate Map Key using Release Key and not by using Default Android Debug keyCheck this post for creating Key using Release Key.