问AlertDialog.dismiss()不工作

EN

        final AlertDialog.Builder alert = new AlertDialog.Builder(this);
        alert.setView(view);
        alert.setCancelable(false);
        dialog = alert.create();
        goButton.setOnClickListener(new View.OnClickListener() { //goButton is inside view which is inflated inside the dialog

            @Override
            public void onClick(View view) {
                age = (String)spinner.getSelectedItem();
                if(gender == null){
                    Utils.makeToast(context, "Select your gender");
                }else if(age == null || age.toLowerCase().contains("age") || age.equals("")){
                    spinner.performClick();
                }else{
                    Utils.makeToast(context, (String)spinner.getSelectedItem() + " - gender: " +gender);
                    editor.putInt("age", Utils.getIntOrZero(age));
                    editor.putString("gender", gender);
                    editor.commit();
                    dialog.dismiss(); // called but not working
                }
            }
        });

        alert.show();