If my fullscreen preference (off by default) is on, I want my Activity to hide the title bar as well as the notification bar. I can do that with requestWindowFeature(Window.FEATURE_NO_TITLE); + FLAG_FULLSCREEN etc. or perhaps setTheme(android.R.style.Theme_NoTitleBar_Fullscreen);
Either of these must happen before setContentView() or they will crash. The hard part is:
- I target API levels 3 to 14, and I only want to hide the title bar if the Activity is not going to use an ActionBar. Otherwise,
FEATURE_NO_TITLEwill hide the ActionBar and lose some important controls. (I’ll instead settle for “lights-out” mode.) - I can’t see how to find out whether an ActionBar will be used until after
setContentView(), when it’s too late.
Things that don’t work:
getActionBar()returns null at this early stage.getWindow.hasFeature(Window.FEATURE_ACTION_BAR)is false.- Knowing (by reflection) that ActionBar exists as a class is insufficient, because, sticking with the default device theme, that might not always use ActionBar on some Ice Cream Sandwich devices, even though the platform has it. (?)
- Alternatively: can I rely on ICS always having an ActionBar? Why?
- Edit: ok, maybe ICS’ title bar is still an ActionBar, just with no items and not even the overflow button? (In which case I still want to hide it.) Can anyone shed any light there?
Any ideas? 🙂
I think what you want to use instead is ActionBarSherlock. It takes care of all the reflection and API level detection for you.