If you really want to worry about android apps, see this link
http://arstechnica.com/security/2012/07/researchers-create-clickjack-rootkit-for-android-that-hijacks-apps/
If you really want to worry about android apps, see this link
http://arstechnica.com/security/2012/07/researchers-create-clickjack-rootkit-for-android-that-hijacks-apps/