I have two versions of the same Java class (same name / methods). Since it's Java, both.java files have the same name. I want to configure gradle in such a way that I can build a "debug" version of my application that pulls in one of these files, and a "production" version of my application that pulls in the other one. How would I go about doing this?
This class has only static methods. I don't ever want to make an instance of this class. I additionally don't want to add the overhead of an if
statement in each of the methods on this class to check which version I'm in.
Following @JFabianMeier's answer you could use 4 projects:
Have you tried creating production and debug source directories/sets? According to the docs you can use multiple directories when specifying source directories in your source set. Try dropping the different versions of your class in their respective production/debug source directories.
I haven't tested myself (not sure about the syntax), but this is based on the Gradle's Java compilation documentation .
sourceSets {
// Could also name this production
main {
java {
srcDirs ['src/main/java', 'src/prod/java']
}
}
debug {
java {
srcDirs ['src/main/java', 'src/debug/java']
}
}
}
You could do the following:
Alternatively, you could look into template engines like Velocity which allow you to generate source code during the build depending on variables and then compile it.
Android has a neat feature called Product Flavors. It lets you swap classes at compile time effortlessly and keep your project clean.
This post is very good to get a taste of it: https://android-developers.googleblog.com/2015/12/leveraging-product-flavors-in-android.html
And here is the full documentation: https://developer.android.com/studio/build/build-variants#product-flavors
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