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Cannot find symbol: method findViewByID(int) [closed]

Been trying to figure out the problem for the last two hours. The solutions I have seen and tried are as follows:

  • Invalidate caches/restart

  • getView().findViewByID(R.id.button) or rootView.findViewById(R.id.button)

  • Casing

          Button popUp = (Button) findViewByID(R.id.button);        
    

This is the video that I was following to create this.

Any help would be greatly appreciated, thank you.

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Answer

Replace

Button popUp = (Button) findViewByID(R.id.button);

with this

Button popUp = (Button) findViewById(R.id.button); 

You are writing findViewByID it’s not allowed in android write findViewById

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