I am learning how to develop android and I'm on chapter 2, I have spent part of yesterday and all day trying to solve the issue I have.

after writing code to debug on the emulator, the line showDialog(O); appears to have a strike through line and it would not allow me to debug. It looks like this command has been depreciated but I don't know how to resolve the issue to enable me move on.
I'm working with the Android icecream version. Is there anybody who can help me resolve it?