Android checkbox issue in ListView

I have an issue with checkbox in ListView. What I wanna do is selecting multiple items and getting the selected items.

When I use CHOICE_MODE_MULTIPLE, I am able to get selected items but checkboxes are not working properly. For instance, I am selecting first item but second items is getting selected or I am deselecting second item but third item is getting selected etc.

When I use CHOICE_MODE_SINGLE, checkboxes are working properly but of course I am not able to get selected items. Here are my codes to select the checkboxes:

ListView listView = (ListView) findViewById(R.id.listChannels);
    ArrayAdapter adapter = new ArrayAdapter(this, android.R.layout.simple_list_item_multiple_choice, arrChannelValues);
    listView.setAdapter(adapter);
    listView.setItemsCanFocus(false);
    listView.setChoiceMode(ListView.CHOICE_MODE_MULTIPLE);
    listView.setOnItemClickListener(new AdapterView.OnItemClickListener() {
        @Override
        public void onItemClick(AdapterView<?> parent, View view, int position, long id) {
            CheckedTextView item = (CheckedTextView)view;
            if(item.isChecked()){
                item.setChecked(false);
            }
            else{
                item.setChecked(true);
            }
        }
    });

And my click event to get the selected items::

ListView listView = (ListView) findViewById(R.id.listChannels);
    int cntChoice = listView.getCount();
    String checked = "";
    String unchecked = "";
    SparseBooleanArray sparseBooleanArray = listView.getCheckedItemPositions();
    for(int i = 0; i < cntChoice; i++)
    {
        if(sparseBooleanArray.get(i) == true)
        {
            checked += listView.getItemAtPosition(i).toString() + "\n";
        }
        else  if(sparseBooleanArray.get(i) == false)
        {
            unchecked+= listView.getItemAtPosition(i).toString() + "\n";
        }

    }