How to get a resource value in build.gradle?

Question

The resValue method (or whatever it\'s called) allows you to set a resource value in buildTypes or productFlavors. I

Answer 1

If you are only trying to set the App Label (or other manifest values) you can solve this with manifest placeholders.

android {

    productFlavors {
        Foo {
             applicationId "com.myexample.foo"
             manifestPlaceholders.appName = "Foo"
        }

        Bar {
             applicationId "com.myexample.bar"
             manifestPlaceholders.appName = "Bar"
        }
    }

    buildTypes {
        release {
            manifestPlaceholders.appNameSuffix =""
        }

        debug {
            manifestPlaceholders.appNameSuffix =".Debug"
            applicationIdSuffix ".debug"
        }
    }
}

Then in your Android Manifest you simply use both placeholders for your app name (or other values)

This allow you to install all 4 variants side by side on a single device as well as give them different names in the app drawer / launcher.

EDIT 11/22/2019

Updated how placeholders values are set based on feedback from @javaxian