application update/upgrade

Hello

What is the best way to upgrade an application without losing the data in the persistent store? It probably should be as easy as downloading the new application and replace the old. But according to some tests that I did, in some situations data in the persistent store is lost after update of the application and the device is restarted. (this happens for example when you use the 4.1 7290 simulator)  So, how the application update process should work in theory (when data is deleted and when not), and how does it work on the real device?

Thank you!

If you pass your own objects such as the com.yourcompany.MyClass in the persistent store that they are deleted when you uninstall your application.

If you use shared classes as java.util.Vector they will remain in persistent memory, even if you uninstall your app.

I do not use common classes only, this is a wrong approach. It is best to save your own class instances.

To preserve your data - do not uninstall the old application, just install the new application on the old application.

Tags: BlackBerry Developers

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