Dollar ($) sign after activity class name in Android logs (non-anonymous inner class)

I am going through some crash logs for my app and the stack trace shows something like :

at MyActivity.formatDouble(MyActivity.java:182)
at MyActivity.access$47(MyActivity.java:196)    
at MyActivity$28.onCameraChange(MyActivity.java:167)

"MyActivity" is an activity and hence not an anonymous inner class. I can't be sure of the dollar sign on line#3 (and the one in line#2 also)