Free app and License Version Check

I have a free version app and a paid version for it. The paid version simply unlock the functionalities of the free app.

The paid app use t开发者_运维百科he Application Licensing. How can I to check the license by free version? Did you have the same problem?

Thanks a lot.

It is difficult to understand what do you need. The free version will be always licensed by definition. Verbatim from the Dev Guide (emphasis mine):

Application, Android Market client, and server

The licensing service is based on the capability of the Android Market server to determine whether a given user is licensed to use a given application. The server considers a user licensed if the user is recorded to have purchased the application, or if the application is available for free. To properly identify the user and determine the license status, the server requires information about the application and user — the application and the Android Market client work together to assemble the information and pass it to the server.

and below:

Requirements and limitations

Licensing is currently for paid apps only, since free apps are considered licensed for all users. If your application is already published as free, you won't be able to upload a new version that uses licensing.

More and more apps supporting an in-app payment system (micropayment, donations, paywalls, other payment types as a service (Checkout's restriction to some major credit cards). So some apps are not free, they just have another payment system - and no Licensing support...

"...since free apps are considered licensed for all users." matches only for market apps paid using CheckOut.