Recycleview checkbox state keeps changing

I have an app that shows a list of all hte installed app inside a users phone. I want to add a checbox to every cardview because I'm planning to make an app blocker app. The problem is the checkboxes always change their states when I move up/down the list.

here's my code:

public class AppsAdapter extends RecyclerView.Adapter<AppsAdapter.ViewHolder>{

    private Context context1;
    private List<String> stringList;

    public AppsAdapter(Context context, List<String> list){
        context1 = context;
        stringList = list;
    }

    //viewholder initialized
    @Override
    public AppsAdapter.ViewHolder onCreateViewHolder(ViewGroup parent, int viewType){

        View view2 = LayoutInflater.from(context1).inflate(R.layout.cardview_layout,parent,false);
        ViewHolder viewHolder = new ViewHolder(view2);
        return viewHolder;
    }

    private SparseBooleanArray sba = new SparseBooleanArray();

    //DATA IS BOUND TO VIEWS
    @Override
    public void onBindViewHolder(ViewHolder viewHolder,final int position){

        viewHolder.setIsRecyclable(false);
        ApkInfoExtractor apkInfoExtractor = new ApkInfoExtractor(context1);
            final String ApplicationPackageName = (String) stringList.get(position);

        //calling apps name and icon
        String ApplicationLabelName = apkInfoExtractor.GetAppName(ApplicationPackageName);
        Drawable drawable = apkInfoExtractor.getAppIconByPackageName(ApplicationPackageName);

        //setting app name and icon for every card
        viewHolder.textView_App_Name.setText(ApplicationLabelName);
        viewHolder.imageView.setImageDrawable(drawable);

        //saving states of the checkbox
        viewHolder.itemView.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                sba.put(position, !sba.get(position));
                notifyDataSetChanged();
            }
        });
        viewHolder.checkBox.setChecked(sba.get(position));

    }

    //viewholder
    public class ViewHolder extends RecyclerView.ViewHolder{

        public CardView cardView;
        public ImageView imageView;
        public TextView textView_App_Name;
        public CheckBox checkBox;

        public ViewHolder (View view){

            super(view);
            checkBox = (CheckBox) view.findViewById(R.id.chckbox);
            cardView = (CardView) view.findViewById(R.id.card_view);
            imageView = (ImageView) view.findViewById(R.id.imageview);
            textView_App_Name = (TextView) view.findViewById(R.id.Apk_Name);
            //textView_App_Package_Name = (TextView) view.findViewById(R.id.Apk_Package_Name);

        }
    }


    @Override
    public int getItemCount(){
        return stringList.size();
    }
}

any answer will be appreciated.