Common code for different android flavors

Question

I am building 4 different flavors of my Android app.

I have a class Customization.java that is the same for 3 of them and different for 1.

Since

Answer 1

I use this to override codes for 5 years, just add a piece of code to your build.gradle.

For lastest gradle plugin(>=3.4.0):

android {
    ......
    applicationVariants.configureEach { ApplicationVariant variant ->
        AndroidSourceSet flavorSourceSet = android.sourceSets.findByName(variant.productFlavors[0].name);
        if (flavorSourceSet != null) {
            String flavorPath = flavorSourceSet.java.srcDirs[0].path;
            variant.javaCompileProvider.configure { task ->
                task.exclude { FileTreeElement elem ->
                    !elem.isDirectory() && !elem.file.parent.startsWith(flavorPath) &&
                        new File(flavorPath, elem.path).exists();
            }
        }
    }
}

For older gradle plugin:

android {
    ......
    applicationVariants.all { ApplicationVariant variant ->
        AndroidSourceSet flavorSourceSet = android.sourceSets.findByName(variant.productFlavors[0].name);
        if (flavorSourceSet != null) {
            variant.javaCompiler.doFirst {
                String flavorPath = flavorSourceSet.java.srcDirs[0].path;
                variant.javaCompiler.exclude { FileTreeElement elem ->
                    !elem.isDirectory() && !elem.file.parent.startsWith(flavorPath) &&
                            new File(flavorPath, elem.path).exists();
                }
            }
        }
    }

It'll find duplicate classes in the Main sourceset and then exclude it during compile to avoid class duplicate error.