CheckBox Checked or UnChecked When Scrolling Listview in Android

I created a Listview with Textview and Checkbox. Firstly I keep all item is Checked default.

But when I uncheck the checkbox and scroll it down to uncheck some other items in the list view, the older ones are checked. Please help me with my code.

This is my code for Adapter Class.

@Override
public View getView(final int position, View convertView, ViewGroup arg2) {

try {
    ViewHolder holder = new ViewHolder();

    LayoutInflater inflater = ((Activity) context).getLayoutInflater();

    if (convertView == null) {

        convertView = layout_inflater.inflate(R.layout.dashbordmenu_listadapter, null);
        holder.txtMenutitle = (TextView) convertView.findViewById(R.id.txtPersonList);
        holder.checkAppList = (CheckBox) convertView.findViewById(R.id.checkPersonList);
        convertView.setTag(holder);
        convertView.setTag(R.id.txtPersonList, holder.txtMenutitle);
        convertView.setTag(R.id.checkPersonList, holder.checkAppList);

    } else {
        holder = (ViewHolder) convertView.getTag();
    }
    holder.checkAppList.setTag(position);
    holder.txtMenutitle.setText(arrayListDashboard1.get(position).getMenuTitle());
    holder.checkAppList.setChecked(arrayListDashboard1.get(position).isSelected());
    holder.checkAppList.setOnCheckedChangeListener(new CompoundButton.OnCheckedChangeListener() {
        @Override
        public void onCheckedChanged(CompoundButton buttonView, boolean isChecked) {
            int selectPosition = (int) buttonView.getTag();
            if(buttonView.isChecked())
            {
                selectedAppId = arrayListDashboard1.get(selectPosition).getMenuId();
                Log.d("TEST","selectedAppId = "+selectedAppId);

            } else {
                notSelectedAppId = arrayListDashboard1.get(selectPosition).getMenuId();
                  Log.d("TEST","notSelectedAppId = "+notSelectedAppId);
            }
        }
    });

} catch (Exception e) {
    e.printStackTrace();
}
return convertView;
}
public class ViewHolder {
   TextView txtMenutitle;
   public CheckBox checkAppList;
  }