Hi all,
we've some problems with Android 5. There seems to be a new policy that
requires two apps that define the same permissions to be signed by the
same key. Otherwise you can't install the app getting the error
INSTALL_FAILED_DUPLICATE_PERMISSION.
This is very annoying and I'd like to know that the suggested
solution/workaround to this is.
We have an Open Source task app that provides access to the tasks via a
ContentProvider. The concept pretty much equals the CalendarProvider. We
also have a (not yet Open Source) sync app that can sync to this task
app (or its ContentProvider).
The problem is that (in contrast to the CalendarProvider) our users
usually install the sync app first. That means the permissions of the
task app are not known when the sync app is installed. So they are not
granted automatically when the task app is installed afterwards.
Until Android 5 the solution was to define the same permissions in the
sync app. But that doesn't work any more in some cases. If the user
compiles the task app himself he can not use our sync app at the same
time, because they are not signed by the same key.
How can we achieve that we protect access to the task ContentProvider by
permissions still allowing them to use a self compiled version?
Even if both apps are signed by the same key it doesn't seem to work in
some cases (does Android 5 also require both apps to be from the same
source?)
A similar issue exists when another developer tries to build a sync app
that can sync to our task app. He can not add the same permissions,
because he can't use the same signing key. But if he can't add the same
permission definition his app won't get the permission if it's installed
before the task app is installed.
What's the solution of this mess?
thanks
Marten
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Marten Gajda
Schandauer Straße 34
01309 Dresden
Germany
tel: +49 177 4427167
email: mar...@dmfs.org
twitter: twitter.com/dmfs_org
VAT Reg. No.: DE269072391
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