Wsrtjtyk

I am have struggling with trying to add a feature on my project and I need some help on how I can move beyond this step. So I have decided to create a method selectCurrency() on my preferencesFragment class As you can see I have created a simple Dialog with not more than 6 currencies, what I want to do is once a currency is selected from this dialog I want to display it on my currency adapter.

public class PreferencesFragment extends PreferenceFragment {



    final static String items = {"$ - US Dollar", "€ - Euro", "£ - British Pound","IRN - IRN ","A$ - Australian Dollar", " CA$ - Canadian Dollar"};



    @Override

    public void onCreate(Bundle savedInstanceState) {

        super.onCreate(savedInstanceState);



        // Load the preferences from the XML resource

        addPreferencesFromResource(R.xml.pref_general);



        //show currency

        final Preference currencyPreference = findPreference

                (getResources().getString(R.string.setting_category_currency_change_button_key));

        currencyPreference.setOnPreferenceClickListener(preference -> {



              selectCurrency();



            return false;

        });



    }







    @RequiresApi(api = Build.VERSION_CODES.M)

    public void selectCurrency() {





        AlertDialog.Builder builder = new AlertDialog.Builder(getContext());

        builder.setTitle("Select Currency")



                .setItems(items, (dialog, which) -> {



                   // String selectedText = items[which].toString();

                    Toast.makeText(getActivity(), items[which] + " was selected", Toast.LENGTH_SHORT).show();

                });

        builder.setPositiveButton("OK", null);

        builder.setNegativeButton("CANCEL", null);

        AlertDialog alertDialog = builder.create();



        alertDialog.show();



        Button button = alertDialog.getButton(DialogInterface.BUTTON_POSITIVE);

        button.setBackgroundColor(Color.argb(100,100,25,51));

        button.setTextColor(Color.WHITE);

    }



}

Here is my adapter.
So currently I am using a string which is not right, so how can I get the selected currency from the above fragment to my adapter down here: at holder1.setWalletAmountView("$ " + Double.valueOf(walletBalance).toString());

public class CurrencyAdapter extends RecyclerView.Adapter<CurrencyAdapter.GeneralViewHolder> {



    @Override

    public void onBindViewHolder(GeneralViewHolder holder, int position) {

        if (getItemViewType(position) == -1) {

            MonthSummaryCard holder1 = (MonthSummaryCard) holder;

            holder1.setWalletAmountView("$ " + Double.valueOf(walletBalance).toString());

            holder1.setTotalExpensesPerMonth("$ " + Double.valueOf(totalExpenseAmount).toString());