I'm trying to setup a bulk of tablets with a custom ROM (as a kind of kiosk mode tablets for my company). In short all I'm doing is deleting all kind of stuff from the tablet and then I'm installing just my self-made kiosk app as a launcher app. I've already accomplished that by doing it manually on a rooted tablet. However I need to that for a bulk of tablets so I want to create an
update.zip which automates that and apply it to all tablets by
adb sideload update.zip.
When I try to load a minimalistic
update.zip which I created to just learn and play around with the
update.zip archive format I always get the following error:
update.zip which just creates a tiny text file in
\system\ to proof that the update really has been applied can be downloaded here: update.zip
What's wrong with my ZIP? All similar questions on this topic seem to be related to signing issues, but:
- i've signed my ZIP
- and all the other issues get errors like
invalid signaturebut I don't get any error message at all!