java - No view found for id ... for fragment (Android application) -

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I'm struggling with the following error when I try to apply the slice layout. Here is the code

MainActivity ;. 

  PublicAction Extends MainActivity Activity {@Override Protected Zero OnCreate (bundled savedInstanceState) {super.onCreate (savedInstanceState); SetContentView (R.layout.activity_main); } Public Zero Show Fregon (see view) {Fragment Manager FM = Match-fragmentation (); Piece transaction FT = FM. BBT transactions (); Ft.edd (r.layout.frag_on, new freagon ()); FT.commit (); }   
}  
 When click on button ativity_main layout called showFragOne. Frag_one FragOne piece slice is the layout for the class;  
  public class FragOne extends Piece {@Override public view onCreateView (LayoutInflater inflater, ViewGroup container, bundle savedInstanceState) {// TODO Auto View Made method stub = inflater.inflate (R.layout .frag_one, container, incorrect); Return view; }   
}  
 Please help me solve this.   
  itemprop = "text"> 
 The way you are calling  add ()  is incorrect. The first parameter  id is a  of  is ViewGroup  that piece, no piece is going to host the layout of itself. For example  
  FT.add (android.R.id.content, new frogon ());

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