Question about backward compatibility

I read that the code is compatible to the top which means that an application written with the api 4.5 should run on later models of the phone.  On the other hand, I've also seen code like this.

#ifdef ABOVE_4_6
Phone number = callInfo.getPhoneNumber ();
#else
Phone number = callInfo.getDisplayPhoneNumber ();
#endif

Someone who indicates that different code is necessary for different API:s. could this elaborate a little bit? Currently

I have the same source for 4.5, 4.6, 4.7, 5, and 6, but in several places, I precompiler statements like the one above.

For the retail world, it's a bit heavy duty 5 different executables.  Or is it possible to code so that the correct API use is decided when running rather than at compile time

It is not possible to choose the right when running (at least not now) API. If you try to install a COD with 6.0 on a device running 4.5 APIs, it wouldn't install or hang on commissioning. The "towards the high compatibility" which is spoken is to mean that if you did a soft for 4.2.1 that will work on 6.1. Preprocessor is the best way to go since, at least for Eclipse, when you change the version of the API, it automatically sets the preprocessor for this version of the API.

Tags: BlackBerry Developers

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