[INSTALL_FAILED_ALREADY_EXISTS] Error when install or update APK-package

When you are going to install or re-install or update your APK-Package with your old data keep, please do the following things,

Just use -r flag for that.

For example,

adb install -r myapp.apk

1) you may use this '-r' flag, even a new APK install.

2) Don’t want to keep or override data of existing apk means, then don’t use this flag.

I am Karthik, software engineer by profession. You can find and follow me, from Social Media or here. Google+