android title question

I add开发者_StackOverflow中文版 breakpoints at the first line in onCreate(Bundle savedInstanceState).I debug this the code. The code stops at this breakpoint,The program has not excuted the installDecor() function. But it has had tile yet on screen. I want to know When title appears ?

Thanks very much !

Do you have the Activity name included in your manifest file?

the title can be changed or removed from android meinfest.xml file. it is not related to Activity. it can be only manged by "