Can two views both have focus in Android

Question

I have a EditText, and a popupWindown(which has a ListView in it), now i touch the EditText, the popupWindow shows.

i need the situation: i can input something in

Answer 1

Actually, technically speaking two views can have focus at the same time - not just as you would imagine (and as you would need for your usecase):

The parents of a focused view can also have their focus set to true. Cf. an excerpt from an example view hierarchy, has-focus=true pops out more than once:

View Hierarchy:
+>DecorView{id=-1, visibility=VISIBLE, width=1920, height=1080, has-focus=true, has-focusable=true, has-window-focus=true, is-clickable=false, 
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+->LinearLayout{id=-1, visibility=VISIBLE, width=1776, height=1080, has-focus=true, has-focusable=true, has-window-focus=true, is-clickable=fal
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+-->ViewStub{id=16909243, res-name=action_mode_bar_stub, visibility=GONE, width=0, height=0, has-focus=false, has-focusable=false, has-window-f
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+-->FrameLayout{id=-1, visibility=VISIBLE, width=1776, height=1008, has-focus=true, has-focusable=true, has-window-focus=true, is-clickable=fal
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+--->FitWindowsLinearLayout{id=2131296268, res-name=action_bar_root, visibility=VISIBLE, width=1776, height=1008, has-focus=true, has-focusable
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+---->ViewStubCompat{id=2131296279, res-name=action_mode_bar_stub, visibility=GONE, width=0, height=0, has-focus=false, has-focusable=false, ha
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+---->ContentFrameLayout{id=16908290, res-name=content, visibility=VISIBLE, width=1776, height=1008, has-focus=true, has-focusable=true, has-wi
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+----->LinearLayout{id=-1, visibility=VISIBLE, width=1776, height=1008, has-focus=true, has-focusable=true, has-window-focus=true, is-clickable
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+------>RecyclerView{id=2131296483, res-name=lstRecordings, visibility=VISIBLE, width=1776, height=873, has-focus=true, has-focusable=true, has