title: Actions in onActivityResult and "Error Can not perform this action after onSaveInstanceState"
body: <p>Implementing an app where the user can log in I have the following situation: If the user is logged in perform the action else start the login activity for result and if the result is Activity.RESULT_OK do the action.</p>
  
  <p>My problem is that the action to perfom is to show a DialogFragment, but calling </p>
  
  <pre><code>DialogFragment newFragment = MyDialogFragment.newInstance(mStackLevel);
  newFragment.show(ft, "dialog")
  </code></pre>
  
  <p>in the onActivityResult callback throws an exception: </p>
  
  <pre><code>Caused by: java.lang.IllegalStateException:  
  Can not perform this action after onSaveInstanceState
  </code></pre>
  
  <p>So how can I solve this? I'm thinking in raising a flag there and show the dialog in the onResume but I see this solution a little dirty</p>
  
  <p>Edit: Added more code (Im following this example for showing the <a href="http://developer.android.com/reference/android/app/DialogFragment.html">DialogFragment</a> </p>
  
  <p>When the action is requested by the user:</p>
  
  <pre><code>... 
  if (!user.isLogged()){
   startActivityForResult(new Intent(cnt, Login.class), REQUEST_LOGIN_FOR_COMMENT);
  }
  </code></pre>
  
  <p>In the same fragment</p>
  
  <pre><code>@Override
  public void onActivityResult(int requestCode, int resultCode, Intent data) {
      super.onActivityResult(requestCode, resultCode, data);
      if (requestCode == REQUEST_LOGIN_FOR_COMMENT &amp;&amp; resultCode == Activity.RESULT_OK) {
          FragmentTransaction ft = getFragmentManager().beginTransaction();
          DialogFragment newFragment = MyDialogFragment.newInstance();
          newFragment.show(ft, "dialog")
      }
  }
  </code></pre>
  
  <p>And if the user logs in the Login activity calls;</p>
  
  <pre><code>setResult(Activity.RESULT_OK);
  finish();
  </code></pre>