java.lang.NoClassDefFoundError: android.provider.Calendar$Calendars
<p>The native email application which version is 2.3 run in version 4.0, it will show the below exception:</p>

<pre><code>W/dalvikvm( 1308): VFY: unable to resolve static field 31 (CONTENT_URI) in Landroid/provider/Calendar$Calendars;
D/dalvikvm( 1308): VFY: replacing opcode 0x62 at 0x0014
E/AccountManager( 1308): Listener was not previously added
W/dalvikvm( 1308): threadid=13: thread exiting with uncaught exception (group=0x40c391f8)
V/EmailProvider( 1308): EmailProvider.query: uri=content://com.screenshare.email.provider/account/2, match is 2
E/AndroidRuntime( 1308): FATAL EXCEPTION: SyncManager
E/AndroidRuntime( 1308): java.lang.NoClassDefFoundError: android.provider.Calendar$Calendars
E/AndroidRuntime( 1308):        at com.screenshare.exchange.SyncManager$CalendarObserver.&lt;init&gt;(SyncManager.java:704)
E/AndroidRuntime( 1308):        at com.screenshare.exchange.SyncManager.registerCalendarObserver(SyncManager.java:655)
E/AndroidRuntime( 1308):        at com.screenshare.exchange.SyncManager.checkMailboxes(SyncManager.java:2138)
E/AndroidRuntime( 1308):        at com.screenshare.exchange.SyncManager.run(SyncManager.java:1949)
E/AndroidRuntime( 1308):        at java.lang.Thread.run(Thread.java:856)
</code></pre>

<p>Is the Calendar API removed from 4.0?? How to make the 2.3 Email application run successfully in 4.0? Or it can't fix??</p>
