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I have an app I've built for a client that uses a custom AccountAuthenticator. It works wonderfully and it does what the client wants.

However, that is only the first app in what will be a collection of apps that will be using the same authentication manager, and this is where I'm not sure how to proceed.

I have no way of knowing which apps will be installed by any given user, or the order they may be installed. I do not what to require the user to provide their credentials for each app; that defeats the purpose of having an authentication manager.

From some initial testing it seems that just including the same code in each app will not work.

Should I do something like what is needed to use any of the google play services? Write a function that tests for the presence of an app that just does authentication stuff, and then send the user off to the market to install the app that does the authentication? Or download the apk from our own servers?

Or is there some other way that would avoid having to push the user out of the app?

Adam van den Hoven
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I'm trying to implement the same environment than you, several applications using same account, my final approach is (I don't say it's the best way):

Have a "background" authenticator application, all normal apps will check if this app is installed, otherwise launch google play to download it.

This authenticator application will create the account using AccountManager (tutorial here) and it will not have any launcher activity, will only be launch from another applications to create the account.

Having this authenticator application, the implementation of the other ones seems easy (seen here)

Guillermo Merino
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  • Have you tried including the authenticator classes in each of the apps, defined with the same package names and so on? – Adam van den Hoven Nov 24 '14 at 20:34
  • I think including the authenticator in all apps might work (see https://stackoverflow.com/a/31882428/2170109) but you need to have the same `sharedUserId`, the same apk-signature and have set this up *before* publishing the apps (you cannot change those things afterwards). – hardysim Jul 03 '18 at 12:09