android 2.2 google map error
<p>I used google.map api to develop a project which works well on android 2.1. But when I run the same project on android 2.2, it encountered some errors. The shown errors are</p>

<blockquote>
  <p>--  AndroidRuntime FATAL EXCEPTION:main
  --  AndroidRuntime java.lang.NoClassDefFoundError:android.net.NetworkConnectivityListener</p>
  
  <p>--  AndroidRuntime at com.google.android.maps.MapActivity.onCreate(MapActivity.java:199)</p>
</blockquote>

<p>I don't know where is the problem? Can anyone help me? 
I will apreciate it very much!</p>
