CODEWITHSUNDEEP
androidsharedpreferencestrial
user1655806
user1655806

Reputation: 396

upgrade trial to full version

I want to publish a trial of my app. In this app, the user has to save a lot of values in the sharedPreferences. If he decides to buy the full version, would the trial be deinstalled, and the sheredPreferences would be deleted too? Does anyone know that?

It would be very nice, if the sharedPreferences wouldnt be deleted, so the full version has access to the value of the trial, therefor the user hasnt to save all the values again.

Upvotes: 3

Views: 302

Answers (2)

user1655806
user1655806

Reputation: 396

Is it possible, to publish the trial with a lower versioncode as the full version, so the trial only would be updated and the sharedPreferences wouldnt be deleted?

Upvotes: 0

Khantahr
Khantahr

Reputation: 8528

Yes, the SharedPreferences are deleted when they uninstall the trial and install the full.

I see a few options you could use, either use the same app for both and use an unlock style of purchase, either via in app purchase, or by selling a separate "unlock" app.

You could save their settings to a remote server and have the full app download them from there. This one has the advantage of allowing syncing of settings across multiple devices, downside is you'd have to make and maintain a server.

You could save them to some other permanent file on the device, but personally I hate it when an app leaves something behind when I uninstall it.

Upvotes: 3

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