Hi, I want to ask something about LVL.
>From my brief understanding, LVL add additional code to check back with Google Play server and refuse to run if it was not a paid version. Is there possibility to have the check in Google Play server and not allow user to update if the copy installed is not a purchase version? This way, developer don't have to include LVL code in every app publish. Of course in-app billing is not applicable. On Sunday, 1 July 2012 15:05:28 UTC+8, Dianne Hackborn wrote: > > On Sat, Jun 30, 2012 at 9:17 AM, Mystique wrote: > >> I was also thinking to write a simple app that generate hash value and >> write it in a file, user will purchase this app and my main app will look >> for this file and compare the hash value. Will this work? Does Google allow >> this? > > > The are two separate apps, so they run under different uids, so can't > generally share files. You could do hacks with putting the file to a > location on external storage where app permissions are not enforced, but a > content provider would be the more formally correct way to do this -- it > allows you to have security between the two (protecting the provider with a > signature-only permission) and guarantee things like no other applications > being able to get in the middle and manipulate the data that is transferred. > > Definitely don't use shared user IDs just for this. > > To be honest, I think this is a great example of where in-app billing work > well, instead of needing to have two different versions of an app. Just be > sure to use the kind of billing product that persists with the user's > account. :) > > -- > Dianne Hackborn > Android framework engineer > hack...@android.com > > Note: please don't send private questions to me, as I don't have time to > provide private support, and so won't reply to such e-mails. All such > questions should be posted on public forums, where I and others can see and > answer them. > > -- You received this message because you are subscribed to the Google Groups "Android Developers" group. To post to this group, send email to android-developers@googlegroups.com To unsubscribe from this group, send email to android-developers+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/android-developers?hl=en
