android - Localizing string resources added via build.gradle using "resValue"

Question

This is in continuation to an answer which helped me on this post

We can add the string resource as follows from build.gradle:

productFlavors {
    main{
        resValue "string", "app_name", "InTouch Messenger"
    }

    googlePlay{
        resValue "string", "app_name", "InTouch Messenger: GPE Edition"
    }
}

It works like a charm and serves the purpose of having different app names per flavor. (with the original app_name string resource deleted from strings.xml file.

But, how do we add localized strings for this string resource added from build.gradle ?

Is there an additional parameter we can pass specifying the locale? OR Possible to do it using a gradle task?

Note: I cannot do this using strings.xml (not feasible because of several ways in which my project is structured)

Answer 1

My other answer about the generated resources may be an overkill for you use case though. Base what I currently know about your project I think this one is a better fit: (not that you can still combine this with generated resources)

src/flavor1/res/values/strings.xml

<string name="app_name_base">InTouch Messenger"</string>
<string name="app_name_gpe">InTouch Messenger: GPE Edition"</string>

src/flavor1/res/values-hu/strings.xml

<string name="app_name_base">InTouch üzenetküld?"</string>
<string name="app_name_gpe">InTouch üzenetküld?: GPE Változat"</string>

src/flavor2/res/values/strings.xml

<string name="app_name_base">Whatever Messenger"</string>
<string name="app_name_gpe">Whatever Messenger: GPE Edition"</string>

src/flavor2/res/values-hu/strings.xml`

<string name="app_name_base">Whatever üzenetküld?"</string>
<string name="app_name_gpe">Whatever üzenetküld?: GPE Változat"</string>

build.gradle

android {
    sourceSets {
        [flavor1, flavor3].each {
            it.res.srcDirs = ['src/flavor1/res']
        }
        [flavor2, flavor4].each {
            it.res.srcDirs = ['src/flavor2/res']
        }
    }
    productFlavors { // notice the different numbers than sourceSets
        [flavor1, flavor2].each {
            it.resValue "string", "app_name", "@string/app_name_base"
        }
        [flavor3, flavor4].each {
            it.resValue "string", "app_name", "@string/app_name_gpe"
        }
    }
}

This means that flavor1/2 will have an extra unused app_name_gpe string resource, but that'll be taken care of by aapt:

android {
    buildTypes {
        release {
            shrinkResources true // http://tools.android.com/tech-docs/new-build-system/resource-shrinking
        }