Question

I’ve got a View defined in an xml file. It contains two Edittext fields (amongt other things like text)

I use an AlertBuilder to trigger a dialog where a user enters text(such as username and pass) into both edittext fields. When I try to retrieve the strings and send them to Login(), both strings are just null. What is going on?

It seems like somehow the string data isn’t saved?

Here’s when I show the Dialog in my app:

SignInDialog.show(ScreenMain.this, 
                                "Login", 
                                new DialogInterface.OnClickListener() {
                                    @Override
                                    public void onClick(DialogInterface dialog, int which) {

                                        LayoutInflater inflater = (LayoutInflater) ScreenMain.this.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
                                        View layout = inflater.inflate(R.layout.screen_dialog_login, null);
                                        LogIn(((EditText) layout.findViewById(R.id.screen_dialog_login_username_edit)).getText().toString(),
                                                        ((EditText) layout.findViewById(R.id.screen_dialog_login_password_edit)).getText().toString());

                                    }
                                }, 
                                "Cancel", 
                                new DialogInterface.OnClickListener() {
                                    @Override
                                    public void onClick(DialogInterface dialog, int which) {
                                        dialog.cancel();
                                    }
                                });

Here’s a class I use to instantiate a Dialog:

/* login dialog*/
static class SignInDialog {

    public static void show(Context context, String positiveText, DialogInterface.OnClickListener positive, String negativeText, DialogInterface.OnClickListener negative){
        AlertDialog.Builder builder;

        LayoutInflater inflater = (LayoutInflater) context.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
        View layout = inflater.inflate(R.layout.screen_dialog_login, null);

        builder = new AlertDialog.Builder(context);
        builder.setView(layout);
        if(positive != null && positiveText != null){
            builder.setPositiveButton(positiveText, positive);
        }
        if(negative != null && negativeText != null){
            builder.setNegativeButton(negativeText, negative);
        }

        builder.create().show();

    }
}

Answer 1

To inflate a layout is to create a new instance of it. (You’re not receiving a reference to an existing instance.) So, in your onClick you are creating a new copy of the layout and your fields don’t contain any text because they are not the same ones your user just entered text in.