Application Manager Example

The Application Manager component is an example user interface for managing existing applications. The component enables the user to perform various actions on installed MIDlet suites. It provides the ability to perform the following tasks:

• Show a list of installed applications
• Show information about an application
• Show the Sun copyright.
• Delete a MIDlet suite
• Invoke a selected MIDlet
• Modify a MIDlet suite's security permission level

Detailed Design

The example application manager is implemented as three MIDlets in the com.sun.midp.appmanager package. All of the MIDlets use the MIDletSuiteStorage class in the com.sun.midp.midletsuite package to access persistent application storage services.

The Manager class implements application selection. For maximum code reuse, the application information and security settings are implemented in the AppInfo and AppSettings classes. The Manager always has at least one application, the example Discovery Application. The figure below shows the dependencies between classes.

To highlight a newly-installed MIDlet suite on startup (a user-experience feature), the Manager checks the RMS record store of the internal suite, find any MIDlet suite identifiers (suiteIDs) written by the Graphical Installer MIDlet. If it finds a suiteID, the Manager highlights the corresponding MIDlet suite, then erases the suiteID from the record store.