Cannot resolve class Keyboard in Android Studio - java

I'm currently facing this issue:
"Cannot resolve class Keyboard"
When I tried to look it up, not much infomation were there beside "KeyBoard is deprecated in API level 29". I tried configuring the API level in build.gradle
In my MainActivity.java everything seemed to be working fine
For some reasons no one had this issue when I tried searching about it.
Could you show me a way to solve this? Thank you!

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I'm a total beginner at programming. I started a new project in Android Studio, in Java. In the activity_main, I get the "URI is not registered" message, and I don't know how to solve it.
I'm aware to the fact that this issue has appeared in previous questions, but I've tried some of the suggested solutions there and they didn't work for me: I tried to invalidate and restart, I deleted all the contents in the idea folder, and my project is ordered: MyProject/src/res/layout/activity_main, which (I think) is the correct order.
Any suggestions?
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Anyway, here's a screenshot of the error:

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