I got Calculator source code from google’s android.git.kernel.org and successfully build the project without problem. But when I launch it in eclipse, I got this
Re-installation failed due to different application signatures.
[2011-08-14 03:37:04 - JvCalculator] You must perform a full uninstall of the application. WARNING: This will remove the application data!
[2011-08-14 03:37:04 - JvCalculator] Please execute 'adb uninstall com.android.calculator2' in a shell.
[2011-08-14 03:37:04 - JvCalculator] Launch canceled!
I don’t think I have the application in my emulator. So it’s not uninstall/install problem, I think. I suspect that the google’s source code has different signature. If so how I can change it? Is there anybody that resolved this issue? Or do I have to build a new project with copy and paste?
Note that when I tried following while connecting emulator,
adb uninstall com.android.calculator2
I got a simple one-word error message “Failure”.
“How can I install Calculator (or any app) from the git repository (or from source) to any device that already has it installed?” You can’t change the signature because that is a closely guarded secret at Google or (any other app developer). What you can do is change the application’s package, with a different package the system will think its a different app.