android - Service with Overlay - catch back button press -

how can that?

current solution

i launch transparent activity, catches press, forwards service , closes afterwards. activity visible in current running activities , therefore it's not beautiful solution.

solutions seen

i've seen app catch press in service - without activity catches press. if show current running activities, there nothing app.

question

how can done? i've read many threads say, not possible, can see, there apps achieve somehow...

i think found out how works... don't use windowmanager.layoutparams.flag_not_focusable in overlays views + overwrite dispatchkeyevent of view:

 @override public boolean dispatchkeyevent(keyevent event) {     if (event.getkeycode() == keyevent.keycode_back)     {         // handle press         // if (event.getaction() == keyevent.action_down)         return true;     }     return super.dispatchkeyevent(event); }