An existing package by the same name with a conflicting signature is already installed
I had developed an inhouse app years back on an old PC and had deployed it. Now I got a new PC, that I used to work on some upgrades, but when I tried to upgrade the app on android devices, I got the above error message.
If I uninstall the old version, I am able to install the upgrade. But unfortunately I won't be able to uninstall and reinstall on remote devices.
I think that if I copy the upgrades back to the old PC and regenerate an APK, that might work, but is there any way I can copy the signature keys from the old PC to the new one and make the installation work?
It will help
The automatically generated key is called the debug
key/certificate.You should generate a new key can just copy it over to both your devices. The only negative of this is your builds process is longer as you need a manual steps.
The other option is to copy over the debug key from one of the systems.
You will find the keys in a folder names .android in your home directory in Linux & user directory in Windows
Tip: Never loose the certificate once you push an app to the market.
In Unix like os the debug key is located by default in
~/.android/debug.keystore