Replace fragment in another Activity Android -


I have two fractal activites. I can go from activity (A) to activity (B), and various pieces After the change, (B) has a home button that should return the first piece of activity (A). My code is: 

  btnHome.setOnClickListener (New View.OnClickListener () {@Override Public Zero onClick (see arg0) {Finish}; MainActivity.fragmentManager .beginTransaction () .replace (R .id.content_frame, new first restriction ()). AddToBackStack (null) .commit ();}});   
 Which is  fragmentManager :  
  FragmentManager fragmentManager = getSupportFragmentManager ();   
 In MainActivity, but I get an error below:  
  java.lang.IllegalStateException: onSaveInstanceState, this action can not be executed < / code>  
 How can I handle it?   
 
  "itemprop =" text "> 
 OK, I got his place from  commitAllowingStateLoss ()   Committed with () . So it became like this:  
  MainActivity.fragmentManager .beginTransaction () .replace (R.id.content_frame, new firstFragment ()) .addToBackStack (zero) .commitAllowingStateLoss ();

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