I have one application which is already live on google play named 'Moodlytics'. https://play.google.com/store/apps/details?id=AnantApps.Moodlytics&hl=en Currently its package name is 'AnantApps.Moodlytics'. (I know its not good practice to use capital letters for package name)
Now I am going to give an update to my application.
So my question is : Can I use 'anantApps.moodlytics' (all with small letters) as package name instead of the original one? Will current live application will be affected by this or not?
No you can't, look here: http://android-developers.blogspot.nl/2011/06/things-that-cannot-change.html Because the package name is an unique name of you package and android cannot determine if it belongs to your older package name. And so it treats it like if it were another app.
Unfortunately, you cannot "update" your application with a different package name. The package name of an application is case sensitive. Once it's published, you can't do anything about it.
See : http://android-developers.blogspot.fr/2011/06/things-that-cannot-change.html
来源：https://stackoverflow.com/questions/19496691/android-change-package-name-of-live-application