Jessica Winblad's List: Programming - Blackberry

• The main issue outside of the complexity of managing memory and laying out the screen components is that
• you want to have a single manageable code base that runs across Blackberry phones so you don't have to contend with several branches of code specific for each phone. You might think that you'd simply import the appropriate Storm touch classes, code the touch interface aspects of your app, compile and run to make your existing code work for 4.7.0. The problem is that shortly after you're done you'll see that your code will run on the Storm simulator but fail miserably for anything below 4.7.0 - the 4.6.x components and below don't recognize imports of classes built for 4.7.0.
• , we will use the preprocessor directives
• configure the Eclipse IDE to provide the preprocessor definition
• JDE_4_7_0
• PREPROCESSOR
• #ifndef statements and multi-line comments to trick Eclipse into allowing the import statements without showing errors when you don't have the 4.7 components installed. As a result these statements will appear as comments in Eclipse but will load appropriately when the JDE_4_7_0 preprocessor definition is loaded
• Note that you must have the #preprocess statement at the top of any file where you're using preprocessor directives.
• Now when you want to run the code using 4.6 or lower components just delete the JDE_4_7_0 preprocessor definition from the project properties and change the installed components to 4.6 or lower
• other issues
• available phone memory which determines the number of persistent/normal object handles available to your program
• the resolution is different between models

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