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Remove green border around Android application

I am currently having an issue with an Android application built with UE4.24 having a green frame around the body of the application:

These are what I tried to do.

to use usb keyboard
set in Config\DefaultEngine.ini under [SystemSettings]

GameName=MyUEAndroidProject
[SystemSettings]
Android.EnableMouse=1
Android.EnableHardwareKeyboard=1

to disable defaultFocusHighlightEnabled
set in C:\Program Files\Epic Games\UE_4.24\Engine\Build\Android\Java\res\values

    <style name="UE4BaseTheme" parent = "@android:style/Theme.Black.NoTitleBar.Fullscreen">
      <item name="android:defaultFocusHighlightEnabled">false</item>
    </style>

I type usb keyboard and appear green border.
Anyone help me. Thanks.

Reference
https://stackoverflow.com/questions/49256092/remove-green-border-around-android-application

I solved myself

change 3files under
C:\Program Files\Epic Games\UE_4.24\Engine\Build\Android\Java\res\
values\styles.xml
values-land\styles.xml
values-port\styles.xml

from
<style name="UE4BaseTheme" parent = "@android:style/Theme.Black.NoTitleBar.Fullscreen" />
to

  <style name="UE4BaseTheme" parent = "@android:style/Theme.Black.NoTitleBar.Fullscreen">
    <item name="android:defaultFocusHighlightEnabled">false</item>
    <item name="android:windowLayoutInDisplayCutoutMode">shortEdges</item>
  </style>

and must set project settings\android
show launch images = true