Open camera in android webview - android-studio

Please dont mark it as duplicate.
I am trying to open camera in android webview. But none of the solution available on stackoverflow is working. No code is working .
i have tried all and all solutions available on this site.
one of the solution is saying to use os-fileup library. But i am new to android and i dont know how to use that.
So please help me with it.
Camera is opening fine in android browser like chrome etc. but not working in app. I have tried all permissions
This is the code i am using in HTML.

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Window.onblur or Window.onfocus not working in Android Studio

I implemented a simple Javascript function, which allows the audio to be paused or start depending on if the window where the script runs is focused on or not, and it works on the web.
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Thanks
Have you checked your preview window in android studio ?
I am asking to you because I was also in the same problem a month ago.
If yes, In The Preview Window. There Will Be A Error Symbol On that window.
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Edit 1:
Exact Solution after your comment
Tap On That Blue Dot
It would tell preview fidelity issue for the session. Mute The Fidelity Issue For The Session From Same Window And You Are Good To Go.

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