No, all apps installed on the device must be signed. Even when you are in "debug mode" you are signing with a debug key. It is possible to create an unsigned APK (it's just a zip file, after all..) but Android won't install it without some signature.
kris On Sat, Jan 26, 2013 at 4:00 AM, bob <[email protected]> wrote: > Is there ever a time when you can actually install an unsigned app on a > device? > > I always get a mysterious message like this: > > > <https://lh5.googleusercontent.com/--1ZaTJT9ee4/UQObBUlgEZI/AAAAAAAAAKo/GADT_qTDSg4/s1600/appnot2.png> > > -- > -- > You received this message because you are subscribed to the Google > Groups "Android Developers" group. > To post to this group, send email to [email protected] > To unsubscribe from this group, send email to > [email protected] > For more options, visit this group at > http://groups.google.com/group/android-developers?hl=en > > > -- -- You received this message because you are subscribed to the Google Groups "Android Developers" group. To post to this group, send email to [email protected] To unsubscribe from this group, send email to [email protected] For more options, visit this group at http://groups.google.com/group/android-developers?hl=en
