Different application signatures

I made a few updates to the code for my android app and tried to test it in my phone but Eclipse gives me an error saying Re-installation failed due to different application signatures. Now I unders开发者_JS百科tand by googling that I have to uninstall the package using adb but I don't know how to do it? I mean it asks me to use adb uninstall in a shell but I have no experience in developing android apps using command line.

Any help will be appreciated!

You could also just delete the application from your phone going to "Settings" -> "Applications" -> "Manage applications". Find your app and delete it.

Connect the device and run

adb uninstall com.mypackagename.myappname