Let’s be clear, RIM should be ashamed of the way their developer toolkit looks. The documentation is sparse at best, their own ide JDE looks and works like something from the 70s, and their Eclipse plugin refuses to work with actual devices and crashes on Simulator hot swaps. I am not even mentioning the fact that the UI has to be built in code like in the DOS days. Seriously? No GUI builders? In 2010? Sheesh. Now to the tip of today: How to make a folder on a SD Card.
Sounds simple right? Open a FileConnection, call a mkdir() method? Nope. IO Exceptions, Cannot access root file system and other not very helpful messages (all that is in addition to the fact that you cannot work with both debugger and SD card at the same time. very convenient).
Basically, the hidden gem is – you must have a trailing slash at the end of your path. Otherwise – no mkdir() for you!
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