gistfile1.txt

private class MyCustomAdapter extends ArrayAdapter<Country> {

    private ArrayList<Country> countryList;

    public MyCustomAdapter(Context context, int textViewResourceId,
                           ArrayList<Country> countryList) {
        super(context, textViewResourceId, countryList);
        this.countryList = new ArrayList<Country>();
        this.countryList.addAll(countryList);
    }

    private class ViewHolder {
        TextView code;
        CheckBox name;

        TextView Beschreibung, FachDatum;
        CheckBox cbStatus;
    }

    @Override
    public View getView(int position, View convertView, ViewGroup parent) {

        ViewHolder holder = null;
        Log.v("ConvertView", String.valueOf(position));

        if (convertView == null) {
            LayoutInflater vi = (LayoutInflater)getSystemService(
                    Context.LAYOUT_INFLATER_SERVICE);
            convertView = vi.inflate(R.layout.tabitem, null);

            holder = new ViewHolder();
            holder.code = (TextView) convertView.findViewById(R.id.code);
            holder.name = (CheckBox) convertView.findViewById(R.id.checkBox1);


            holder.Beschreibung = (TextView) convertView.findViewById(R.id.tvBeschreibung);
            holder.FachDatum = (TextView) convertView.findViewById(R.id.tvFachDatum);
            holder.cbStatus = (CheckBox) convertView.findViewById(R.id.cbtabitemerledigt);
            convertView.setTag(holder);
        });
        }
        else {
            holder = (ViewHolder) convertView.getTag();
        }

        Country country = countryList.get(position);

        holder.cbStatus.setChecked(country.isSelected());
        holder.cbStatus.setText("abc");
        holder.Beschreibung.setText(country.getBeschreibung());
        holder.FachDatum.setText(country.getFachDatum());
        
        //You forget this
        holder.cbStatus.setTag(country);
        
        //move to the end
         holder.cbStatus.setOnClickListener(new View.OnClickListener() {
                 public void onClick(View v) {
                    CheckBox cb = (CheckBox) v;
                    Country country = (Country) cb.getTag();
                    Toast.makeText(getApplicationContext(),
                            "Clicked on Checkbox: " + cb.getText() +
                                    " is " + cb.isChecked(),
                             Toast.LENGTH_LONG).show();
                    country.setSelected(cb.isChecked()); //this line is causing the crash
            }


        return convertView;

    }

}