ListView를 scroll하면 focus가 날아가는 이슈 해결

 listView.setChoiceMode(ListView.CHOICE_MODE_SINGLE);
        listView.setOnItemSelectedListener(new AdapterView.OnItemSelectedListener() {
            @Override
          public void onItemSelected(AdapterView<?> parent, View view, int position, long id) {
                listView.setItemChecked(mPosition, true);
            }
 
            @Override
            public void onNothingSelected(AdapterView<?> parent) {
                listView.setItemChecked(mPosition, true);
                if(listView.isFocused() || listView.isItemChecked(mPosition))
                    showDialog = false;
            }
        });