App Not Installed error

Question

I have created an unsigned apk for my nexus 7. When I try and install it, the device pops up with, "App Not Installed". In the Eclipse emulator everything works fine. I have tried to alter my target to 4.2,4.3,4.4. Again, all work in the emulator but not on the device, the device is running 4.3.

Answer 1

An unsigned application cannot be installed. You should sign it with jarsigner tool (provided by Android SDK tools)

The important points to understand about signing Android applications are:

• All applications must be signed. The system will not install an application on an emulator or a device if it is not signed.

See http://developer.android.com/tools/publishing/app-signing.html