Normal activity jump to mapactivity error

When you click a control from a normal activity to jump to an inherited Mapactivity class mymapactivity, an error occurs.

Log information:

E/androidruntime (15631): FATAL exception:main
E/androidruntime (15631): java.lang.NoClassDefFoundError:xxx.xxx.MyMapActivity

Original related code:

<pre name= "code" class= "java" ><application        android:name= "Com.etnet.android.MyApplication"        android:icon= "@drawable/launcher"        android:label= "@string/app_name" >        <activity android:name=            " Xxx.xxx.CompanySiteActivity "/></application>

Intent Intent = new Intent (this,mymapactivity.class); startactivity (Intent);

Workaround:

Add one to the manifest file: <uses-library android:name= "Com.google.android.maps"/>

The relevant code after the change:

<application        android:name= "com.etnet.android.MyApplication"        android:icon= "@drawable/launcher"        Android:label= "@string/app_name" >        <uses-library android:name= "Com.google.android.maps"/>        < Activity            android:name= "xxx.xxx.CompanySiteActivity"/></application>

Reference from:

http://blog.csdn.net/cj_guangtou/article/details/6452803

Normal activity jumps to mapactivity error