App List recyclerview check box changing state

I made an app that have a list of all installed app in your device and I added a checkbox to the recyclerview to select an app on the list(I'm going to use this app as a base fo an app blocker). The problem is that the checkbox state always change when scrolling up/down. ex. I checked facebook then I scrolled down and when I scrolled up facebook is unchecked and sometimes a random app is checked.

here are my codes:

ApkInfoextractor:

public class ApkInfoExtractor {

    Context context1;

    public ApkInfoExtractor(Context context2){

        context1 = context2;
    }

    public List<String> GetAllInstalledApkInfo(){

        List<String> ApkPackageName = new ArrayList<>();

        Intent intent = new Intent(Intent.ACTION_MAIN,null);
        intent.addCategory(Intent.CATEGORY_LAUNCHER);
        intent.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK | Intent.FLAG_ACTIVITY_RESET_TASK_IF_NEEDED );

        //Information that is returned from resolving an intent against an IntentFilter
        List<ResolveInfo> resolveInfoList = context1.getPackageManager().queryIntentActivities(intent,0);

        for(ResolveInfo resolveInfo : resolveInfoList){
            ActivityInfo activityInfo = resolveInfo.activityInfo;

            if(!isSystemPackage(resolveInfo)){

                ApkPackageName.add(activityInfo.applicationInfo.packageName);
            }
        }
        return ApkPackageName;
    }

    public boolean isSystemPackage(ResolveInfo resolveInfo){
        return ((resolveInfo.activityInfo.applicationInfo.flags & ApplicationInfo.FLAG_SYSTEM) != 0);
    }

    public Drawable getAppIconByPackageName(String ApkTempPackageName){
        Drawable drawable;

        try{
            drawable = context1.getPackageManager().getApplicationIcon(ApkTempPackageName);
        }
        catch (PackageManager.NameNotFoundException e){

            e.printStackTrace();
            drawable = ContextCompat.getDrawable(context1, R.mipmap.ic_launcher);
        }
        return drawable;
    }

    public String GetAppName(String ApkPackageName){

        String Name = "";
        ApplicationInfo applicationInfo;
        PackageManager packageManager = context1.getPackageManager();

        try {

            applicationInfo = packageManager.getApplicationInfo(ApkPackageName, 0);

            if(applicationInfo!=null){
                Name = (String)packageManager.getApplicationLabel(applicationInfo);
            }

        }catch (PackageManager.NameNotFoundException e) {
            e.printStackTrace();
        }
        return Name;
    }
}

AppsAdapter:

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();
    }
}

I've tried many solutions from google and none of them worked for me. So a detailed answer is going to be helpful (sample codes or other references are much appreciated.)