Why getting this error Cannot resolve symbol 'menu' in onCreateOptionsMenu?

[AC Question]

In R.menu I am getting this error.
@override
public boolean onCreateOptionsMenu(Menu menu) {
getMenuInflater().inflate(R.menu.activity_apk_list, menu);
return true;
}

 

[B. Diddy]

Moved to the Software Development forum.

 

[FSP Devs]

Paste log with exception.