java - Android No resource matches android:windowIsFloating -


i trying make activity popup / floating activity after watching video

https://www.youtube.com/watch?v=fn5olqquock

but want make window background semi translucent. added windowisfloating -> true

<style name="apptheme.namtheme">     <item name="android:windowisfloating">true</item>     <item name="android:windowcloseontouchoutside">true</item> </style>

but getting following error

error:(2374, 21) no resource found matches given name: attr 'android:windowisfloating'.

add parent android theme custom theme. example,

<style name="apptheme.namtheme" parent="android:theme.light.notitlebar">     <item name="android:windowisfloating">true</item>     <item name="android:windowcloseontouchoutside">true</item> </style>

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