在应用程序中，即使我在数据库中更改它们，仍然是来自数据库的旧信息

Question

我从一个人那里获得了应用程序（所以这不是我的），而且我不太了解Java。应用程序必须执行以下操作：连接到url（http），它是json，它来自数据库，并在屏幕上显示信息。所有连接均正常，但是当我更改数据库中的某些信息时，应用程序信息不会更改。我不知道如何找到网址的路径或在哪里找到问题。

public class PizzeriaListAdapter extends ArrayAdapter<PizzeriasData> {

    public PizzeriaListAdapter(@NonNull Context context, ArrayList<PizzeriasData> pizzerias) {
        super(context, R.layout.pizzerias_list_item, pizzerias);
    }

    @Override
    public View getView(int position, View convertView, ViewGroup parent) {
        LayoutInflater myInflator = LayoutInflater.from(getContext());
        View customView = myInflator.inflate(R.layout.pizzerias_list_item, parent, false);

        PizzeriasData pizzeriaData = getItem(position);

        TextView pizzeriaName = customView.findViewById(R.id.pizzeria_name);
        pizzeriaName.setText(pizzeriaData.get_name());


        ImageView pizzeriaImage = customView.findViewById(R.id.pizzeria_image);
        String adress = "http://matej.martintoth.sk";      
        String imgSourceFull = pizzeriaData.get_profile_image(); 
        String substr = imgSourceFull.substring(2);                
        String imgSource = adress + substr;                       
        Picasso.get().load(imgSource).into(pizzeriaImage);       

        return customView;
    }


}

Pizzerias.java

protected void showPizzeriaList() {
    data.setVisibility(View.GONE);
    pizzeriasListView.setVisibility(View.VISIBLE);
    MyDBHandler myDB = new MyDBHandler(this);
    ArrayList<PizzeriasData> pizzas = myDB.getPizzerias();

    ListAdapter pizzeriaListAdapter = new PizzeriaListAdapter(this, pizzas);

    ListView pizzeriasListView = findViewById(R.id.pizzeriasListView);
    pizzeriasListView.setAdapter(pizzeriaListAdapter);

    pizzeriasListView.setOnItemClickListener(
            new AdapterView.OnItemClickListener() {
                @Override
                public void onItemClick(AdapterView<?> adapterView, View view, int i, long l) {
                    PizzeriasData pizzerias = (PizzeriasData) adapterView.getItemAtPosition(i);
                    Intent catIntent = new Intent(Pizzerias.this, Categories.class);

                    if(ShoppingCart.instance.getItemsCount() != 0 && pizzerias.get_id() != ShoppingCart.instance.getActPizzeriaId()) {
                        Toast.makeText(Pizzerias.this, "Objednávka môže pochádzať len z jednej pizzerie", Toast.LENGTH_LONG).show();
                    }
                    else {
                        catIntent.putExtra("pizzeriaId", pizzerias.get_id());
                        if(ShoppingCart.instance.getActPizzeriaId() == 0 || ShoppingCart.instance.getItemsCount() == 0)
                            ShoppingCart.instance.changePizzeria(pizzerias.get_id());
                        startActivity(catIntent);
                    }
                    //Toast.makeText(Pizzerias.this, pizzerias.get_name(), Toast.LENGTH_LONG).show();
                }
            }
    );
}

HTTPHandler.java

public class HTTPHandler {

    private static final String TAG = "com.example.lukas.pizzerias";

    public HTTPHandler() {
    }

    public String makeServiceCall(String reqUrl) {

        String response = null;
        try {
            URL url = new URL(reqUrl);
            HttpURLConnection conn = (HttpURLConnection) url.openConnection();
            conn.setRequestMethod("GET");
            // read the response
            InputStream in = new BufferedInputStream(conn.getInputStream());
            response = convertStreamToString(in); // TODO: zistit, co je obsahom response na real zariadeni
        } catch(MalformedURLException e) {
            Log.e(TAG, "MalformedURLException: " + e.getMessage());
        } catch(ProtocolException e) {
            Log.e(TAG, "ProtocolException: " + e.getMessage());
        } catch(IOException e) {
            Log.e(TAG, "IOException: " + e.getMessage());
        } catch(Exception e) {
            Log.e(TAG, "Exception: " + e.getMessage());
        }
        return response;
    }

    private String convertStreamToString(InputStream is) {
        BufferedReader reader = new BufferedReader(new InputStreamReader(is));
        StringBuilder sb = new StringBuilder();

        String line;
        try {
            while((line = reader.readLine()) != null) {
                sb.append(line).append('\n');
            }
        } catch(IOException e) {
            e.printStackTrace();
        } finally {
            try {
                is.close();
            } catch(IOException e) {
                e.printStackTrace();
            }
        }
        return sb.toString();
    }
}