How to implement search function on custom ArrayAdapter with searchview?

I'm a beginner in android programming and I have a problem I can't seem to find a solution for. I searched stackoverflow for hours but I still don't quite get it how should I do this stuff:

I created a slim api with php which communicates with a local xampp mysql server, and I can do basic CRUD operations on it. I GET the data with the api from the server, which returns all "items" in the database to a List, and I can use this in a listView. Every list item has 6 TextViews so I created a custom ArrayAdapter but I don't know to search for specific list items.

My Item class:

  public class Item {

        private String mName;
        private String mQuantity;
        private String mDate_added;
        private String mBarcode;
        private String mPrice;
        private String mWarranty;
        private int mId;

        public Item(String mName, String mQuantity, String mDate_added, String mBarcode, String mPrice, String mWarranty,int mId) {
            this.mName = mName;
            this.mQuantity = mQuantity;
            this.mDate_added = mDate_added;
            this.mBarcode = mBarcode;
            this.mPrice = mPrice;
            this.mWarranty = mWarranty;
            this.mId = mId;
        }

        public int getmId(){return mId; }

        public String getmName() {
            return mName;
        }

        public String getmQuantity() {
            return mQuantity;
        }

        public String getmDate_added() {
            return mDate_added;
        }

        public String getmBarcode() {
            return mBarcode;
        }

        public String getmPrice() {
            return mPrice;
        }

        public String getmWarranty() {
            return mWarranty;
        }
    }

My adapter

public class ItemAdapter extends ArrayAdapter<Item>  {


    public ItemAdapter(Context context, ArrayList<Item> items) {
        super(context,0, items);

    }


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

        View ListItemView= convertView;
        if (ListItemView == null) {



            ListItemView = LayoutInflater.from(getContext()).inflate(R.layout.list_item,parent,false);

           Item currentItem = getItem(position);


            TextView nameText = (TextView) ListItemView.findViewById(R.id.name);
            TextView quantityText = (TextView) ListItemView.findViewById(R.id.quantity);
            TextView date_addedText = (TextView) ListItemView.findViewById(R.id.date_added);
            TextView barcodeText = (TextView) ListItemView.findViewById(R.id.barcode);
            TextView priceText = (TextView) ListItemView.findViewById(R.id.price);
            TextView warrantyText = (TextView) ListItemView.findViewById(R.id.warranty);


            nameText.setText(currentItem.getmName());
            quantityText.setText(currentItem.getmQuantity() +" e");
            date_addedText.setText(currentItem.getmDate_added());
            barcodeText.setText(currentItem.getmBarcode());
            priceText.setText(currentItem.getmPrice()+ " pr/e");
            warrantyText.setText(currentItem.getmWarranty());

        }

        return ListItemView;
    }

}

I get the data with httpurlconnection get method, and I use an AsyncTaskLoader for this. this returns the data to a List from a given url.

public class ItemLoader extends AsyncTaskLoader<List<Item>> {

    private String mUrl;

    public ItemLoader(Context context, String url) {
        super(context);
        mUrl = url;
    }


    @Override
    protected void onStartLoading() {



        forceLoad();
    }



    @Override
    public List<Item> loadInBackground() {


        if (mUrl == null) {
            return null;
        }

        // Perform the network request, parse the response, and extract a list of items.
        List<Item> items = QueryUtils.fetchItemData(mUrl);
        return items;
    }

}

Next up, In my main activity I implement loader callbacks.

private ItemAdapter mAdapter;

    @Override
        public android.content.Loader<List<Item>> onCreateLoader(int i, Bundle bundle) {

            return new ItemLoader(this,API_REQUEST_URL);
        }


     @Override
        public void onLoadFinished(android.content.Loader<List<Item>> loader, List<Item> items) {
            mAdapter.clear();

            if (items != null && !items.isEmpty()) {


                mAdapter.addAll(items);
            }

        }

@Override
    public void onLoaderReset(android.content.Loader<List<Item>> loader) {
        Log.e("init loader","Log");

        mAdapter.clear();
    }

In onCreate

 android.app.LoaderManager loaderManager = getLoaderManager();
            loaderManager.initLoader(0, null, MainActivity.this);

listView.setAdapter(mAdapter);

I want to search for the names of the items, and return the corresponding in the ListView. I created a search view for it with a setOnQueryTextListener:

@Override
    public boolean onCreateOptionsMenu(Menu menu) {
        getMenuInflater().inflate(R.menu.menu_main,menu);

        SearchManager manager = (SearchManager) getSystemService(Context.SEARCH_SERVICE);
        SearchView search = (SearchView) menu.findItem(R.id.search).getActionView();
        search.setSearchableInfo(manager.getSearchableInfo(getComponentName()));

        search.setOnQueryTextListener(new SearchView.OnQueryTextListener() {

            @Override
            public boolean onQueryTextSubmit(String s) {


                return false;
            }

            @Override
            public boolean onQueryTextChange(String s) {

                return false;
            }

        });

        return true;
    }

aaand...now I'm kinda stuck. I know I should implement 'Filterable' on the adapter class, override some methods, create a filter, etc, and it's not that hard if I have a hardcoded List, which I just need to change, but these network requests, background threads, get data from the server stuff confused me so much I don't know what to do.

Halp! :c