Java Development

[mario_n]

Hi,

My Blackberry app is finished and works fine on Blackberry devices with OS 6, or OS 7.

But, my client wants app to be functional on Blackberry devices with OS 5.

When app is downloaded and started on device with OS 5, (example Blackberry 9550), then following message in debugger appears:

Thread [net_rim_bb_ribbon_app(85)id=126808064] (Suspended (exception RuntimeException))
ApplicationEntryPoint.run() line: 401
ApplicationEntry.invoke() line: 559

[0.0] Class 'net.rim.device.api.ui.menu.ContextMenuProvider' not found.[0.0]
[0.0] Linker error: 'VerifyError' for app
[0.0] VM:CLRCv=0
[0.0] Error starting app: Class 'net.rim.device.api.ui.menu.ContextMenuProvider' not found.

Where to start, and how to fix this backward incompatibility?

Thanks

[Dionysus]

You are going to have to preprocess your code as contextmenuprovider is only supported in OS6 and up.

[Dionysus · Accepted solution]

Have a look at the following link:

http://docs.blackberry.com/en/developers/deliverables/21065/Specifying_preprocessor_directives_65763...

and search the forum for examples.

[simon_hain]

In addition, note that an application should be compiled with a JRE version the same or smaller than the OS it should run on.

For OS 5, you have to compile it with JRE 5 (or lower).

[mario_n]

Thank you all..