How to support multiple android version in your code?

Question

Take accessing contacts in android android.jar for versions 1.6 has People.CONTENT_URI for invoking contacts related info whereas in later versions we need to have api suppo

Answer 1

• If you don't really need the new functionnalities, and really have to support old Android versions, drop it. Build your app for the oldest version, and don't bother with this kind of thing.
• In the other case, you can detect the version using Build, and use reflection to load the classes you need. An example of that can be found in the source code of the K9Mail app