Exception when try to setError() in an editText inside a Popup Window

问题

This is my code:

 if(textNomeGiocatore.getText().toString().equals("")){
                InputMethodManager imm = (InputMethodManager)getSystemService(
                        Context.INPUT_METHOD_SERVICE);
                imm.hideSoftInputFromWindow(textNomeGiocatore.getWindowToken(), 0);

                textNomeGiocatore.setError("Nome giocatore necessario");





            }

I have an error in the row :

 textNomeGiocatore.setError("Nome giocatore necessario");

this is the error :

 android.view.WindowManager$BadTokenException: Unable to add window -- token android.view.ViewRootImpl$W@426940a8 is not valid; is your activity running?

I try to post delayed the error message without resoult.

Someone Can help me?

回答1:

0Please try this:

   if(textNomeGiocatore.getText().toString().equals("")) {
        InputMethodManager inputManager = (InputMethodManager) getSystemService(Context.INPUT_METHOD_SERVICE);
        if (inputManager != null &&  getCurrentFocus() != null) {
                inputManager.hideSoftInputFromWindow(getCurrentFocus().getWindowToken(), 0);
        }
        textNomeGiocatore.requestFocus() 
        textNomeGiocatore.setError("Nome giocatore necessario");
    }

来源：https://stackoverflow.com/questions/30453580/exception-when-try-to-seterror-in-an-edittext-inside-a-popup-window