'How to migrate android module to androidx?

This android project has lots of modules, when I do Refactor->Migrate to androidx, source codes from module "app" upgraded,

but codes from modules are never migrated...

Now have to fix it buy lots of manual replacement. Any idea how to migrate these modules? Thanks for your help.

Solution 1:^[1]

Check if you added this code android.useAndroidX=true in gradle.properties.for more details please refer this link

Anyway, thanks, I solved it by doing migration first on a refresh copy without doing anything to gradle versions.

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Solution	Source
Solution 1	Rohini
Solution 2	alex j