A></B>(<A target="_top" HREF="http://developer.android.com/reference/android/content/Context.html?is-external=true" title="class or interface in android.content">Context</A>&nbsp;context,
            <A target="_top" HREF="http://developer.android.com/reference/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</A>&nbsp;channel)</CODE>

<BR>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Cancels a previous call to subscribe.</TD>
</TR>
</TABLE>
&nbsp;<A NAME=