Define a context change listener
The following
example assumes that you are creating a private inner class as part of an
application that requires a context change listener.
-
Import the required classes and interfaces.
import net.rim.blackberry.api.bbm.platform.*;
import net.rim.device.api.ui.component.*;
-
Create the framework for the context change service listener,
defining the
accessChanged() method. The
accessErrorCode parameter is one of the fields from
the
BBMPlatformContext class (for example,
ACCESS_BLOCKED_BY_IT_POLICY). The following code sample
displays dialog boxes that informs the user what change has occurred.
class MyBBMPlatformContextListener extends BBMPlatformContextListener
{
public void accessChanged(boolean isAccessAllowed, int accessErrorCode)
{
if(isAccessAllowed)
{
Dialog.inform("Access to the platform context is now allowed.");
}
else
{
Dialog.inform("Access to the platform context is now disallowed because
of error:" + accessErrorCode);
}
}
public void appInvoked(int reason, Object param)
{
/*code for handling different contexts for invocation:
<reason> is a constant in BBMPlatformApplication prepended
with INVOKE, which tells you why this app was invoked and by
whom
<param> is an object representing a custom paramater with
more information about the invocation context*/
}
}
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