Eclipse project layout for Android with premium features

Question

I am about to embark on a project for android that will have a free version and a premium version.

In VC++ land you would do this by adding preprocessor tags around the premium sections (or where the code would enter a premium section).

I could have two projects with separate source trees, but a bug in one would require a fix in the other.

However in Java you don't have a preprocessor so how do I go about this? Say you have a screen with an additional button that is the premium feature how would that be handled?

I will be using Eclipse as my IDE so Eclipse-centric answer appreciated.

Answer 1

If it's just a about buttons or other View-components you could simply hide them in the "lite" version, like

public static final boolean LITE_VERSION = true;

... 

if (LITE_VERSION) {
   premiumButton.setVisibility(View.INVISIBLE);
}

Answer 2

I would rather put the advanced things in another jar and use IOC to query for these rather than rely on a if(bool) for this.

For you lite version, you just don't distribute the premium jars.

Answer 3

Take a look at this http://stackoverflow.com/questions/3062946/how-can-i-use-the-paid-version-of-my-app-as-a-key-to-the-free-version