Java Development

[heather_1]

Here is my problem: I am trying to load an app I have written on a device. The app works fine on the simulator, but when I load it on the device, I get a nullPointerException. I would like to debug on the device if possible, but I get errors when I try to run the app while it is connected to my computer because I am also using a SQLite database. Any suggestions?

[peter_strange]

If you put "debug "in the Search box, you will get a number of useful KB articles including this one:

http://supportforums.blackberry.com/t5/Java-Development/How-Do-I-Debug-on-a-Live-Device/ta-p/446842

[LoganSix]

The SD Card on my 9930 is not accessible when connected. So, after you start the debugging, you have to Disconnect the SD Card so that the application can access it.

[peter_strange]

When you connect, the device normally puts up a prompt asking if you want to access the SD Card as mass storage, or if you are connecting for charge only.  Charge only is good enough to do debugging, which I think means your SD Card is accessible.  Or am I wrong.  Can't say I have specifically tested this, just this is how I thought it would work. 

[LoganSix]

No, "Charge Only" does not work.  The device still uses the Desktop Manager to sync and the Debug syncs.

Also, it seems that if you adjust the SD Card connection before debugging, then the debugging goes haywire.

Currently, I'm having an issue that I can write the database (because it is showing a size of 5 KB when I look throught he windows explorer), but I can't read from it.  But, I won't hijack this thread with that issue.

[peter_strange]

Shut down, Desktop Manager - it is grabbing the device.

You can check if your debugging will work by going into the Media Application, pressing menu, and selecting Explore.  You should see the internal card (if your device has one) and the media card.  If the media explorer can see it, with the device connected, you should be able to debug.

[LoganSix]

Yes, that did it.  My desktop manager didn't open this morning and that kept it from messing up the SD Card connection.