Actions in onActivityResult and "Error Can not perform this action after onSaveInstanceState"

Question

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.

My problem is that the action to perfom is to show a DialogFragment, but calling

DialogFragment newFragment = MyDialogFragment.newInstance(mStackLevel); newFragment.show(ft, "dialog") 

in the onActivityResult callback throws an exception:

Caused by: java.lang.IllegalStateException:   Can not perform this action after onSaveInstanceState 

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

Edit: Added more code (Im following this example for showing the DialogFragment

When the action is requested by the user:

...  if (!user.isLogged()){  startActivityForResult(new Intent(cnt, Login.class), REQUEST_LOGIN_FOR_COMMENT); } 

In the same fragment

@Override public void onActivityResult(int requestCode, int resultCode, Intent data) {     super.onActivityResult(requestCode, resultCode, data);     if (requestCode == REQUEST_LOGIN_FOR_COMMENT && resultCode == Activity.RESULT_OK) {         FragmentTransaction ft = getFragmentManager().beginTransaction();         DialogFragment newFragment = MyDialogFragment.newInstance();         newFragment.show(ft, "dialog")     } } 

And if the user logs in the Login activity calls;

setResult(Activity.RESULT_OK); finish(); 

Answer 1

Best thing I've come up with is to not use .show() but rather do this.

CheckinSuccessDialog dialog = new CheckinSuccessDialog(); //dialog.show(getSupportFragmentManager(), null); FragmentTransaction ft = getSupportFragmentManager().beginTransaction(); ft.add(dialog, null); ft.commitAllowingStateLoss(); 

Answer 2

Here is the workaround that works fine for me.

private void alert(final String message) {     Handler handler = new Handler(Looper.getMainLooper());     handler.post(new Runnable() {         public void run() {             AlertDialogFragment alertDialogFragment = AlertDialogFragment.newInstance(message);             alertDialogFragment.show(getFragmentManager(), ALERT_DIALOG_FRAGMENT);         }     });         }