I would like to install logcat as system-app on a non-rooted phone.
Is that possible (using adb without root-access)?
No. A system app has to be either installed by root or signed with the same key that signed the ROM image.
adb install
just installs an app in the usual way. It doesn't make an app a system app.
Commented
Jul 12, 2013 at 8:06