•
net.rim.device.api.collection.CollectionListener
4.
Implement the
CollectionEventSource.removeCollectionListener()
method, using the
ListenerUtilities.removeListener()
method to remove a
CollectionListener
from the
Vector
that contains
SyncCollection
listeners for the BlackBerry® device application. In the following code
sample, we implement
CollectionEventSource.removeCollectionListener()
to invoke
ListenerUtilities.removeListener()
to remove a listener from the
Vector
that contains listeners
public void removeCollectionListener(Object listener)
{_listeners = ListenerUtilities.removeListener( _listeners, listener );
}
Notify the system when a collection changes
1.
Import the
net.rim.device.api.collection.CollectionListener
interface.
2.
To notify the system when an element is added to a
SyncCollection
, invoke
CollectionListener.elementAdded()
.
for( int i=0; i<_listeners.size(); i++ )
{
CollectionListener cl = (CollectionListener)_listeners.elementAt( i );
cl.elementAdded( this, object );
}
return true;
}
3.
To notify the system when an element in a
SyncCollection
is replaced, invoke
CollectionListener.elementUpdated()
.
4.
Invoke
CollectionListener.elementRemoved()
.
Runtime storage
BlackBerry® devices use a runtime store as a central location in which BlackBerry Java® Applications can share runtime objects.
By default, only BlackBerry Java Applications that Research In Motion digitally signs can access data in the runtime store. Contact
RIM for information about how to control access to your data.
The runtime store is not persistent. When you restart the BlackBerry device, the data in the runtime store clears.
Retrieve the runtime store
1.
Import the
net.rim.device.api.system.RuntimeStore
class.
2.
Invoke
RuntimeStore.getRuntimeStore()
.
RuntimeStore store = RuntimeStore.getRuntimeStore();
Development Guide
Runtime storage
51
