使用JSONArray另一个类？ [英] Use JSONArray in another class?

问题描述

我有，在下拉列表中加载客户的名称微调。

I have got a spinner that loads the name of the customers in the dropdown.

微调器会从一个JSON数组的字符串。
我也得到了一些textviews，其中所选客户的名称，ADRESS，电话号码应该加载纺纱厂选择更改时。

The spinner gets the string from a JSON array. I have also got a few textviews where the Name,Adress,Telephone number of the selected customer should load when the spinners selection changes.

但JSONArray在另一个类使用，我该如何使用JSONArray在另一个类？（我怎样才能加载正确的客户详细信息时微调选择更改？）

But the JSONArray is used in another class, how can I use the JSONArray in another class?(How can I load the correct customer details when spinner selection changes?)

这是我的code：

     public class Gegevens extends Main {

            Spinner spCustomers;


            private JSONObject jsonChildNode;
            private JSONArray jsonMainNode;
            private String name;
            private TextView txtNaam;
            private TextView txtAdres;

            @Override
            protected void onCreate(Bundle savedInstanceState) {
                super.onCreate(savedInstanceState);
                setContentView(R.layout.activity_gegevens);
                new AsyncLoadCustDetails().execute();
                spCustomers = (Spinner) findViewById(R.id.spKlanten);
                spCustomers.setOnItemSelectedListener(new mySelectedListener());
                txtNaam = (TextView)findViewById(R.id.txtNaam);



            }


            protected class AsyncLoadCustDetails extends
                    AsyncTask<Void, JSONObject, ArrayList<String>> {
                ArrayList<CustomerDetailsTable> custTable = null;

                @Override
                protected ArrayList<String> doInBackground(Void... params) {

                    RestAPI api = new RestAPI();
                    ArrayList<String> spinnerArray = null;
                    try {

                        JSONObject jsonObj = api.GetCustomerDetails();

                        JSONParser parser = new JSONParser();

                        custTable = parser.parseCustomerDetails(jsonObj);
                        spinnerArray = new ArrayList<String>();
//All i can think of is make new array for each value?

                        Log.d("Customers: ", jsonObj.toString());
                        jsonMainNode = jsonObj.optJSONArray("Value");
                        for (int i = 0; i < jsonMainNode.length(); i++) {
                            jsonChildNode = jsonMainNode.getJSONObject(i);
                            name = jsonChildNode.optString("Naam");


                            spinnerArray.add(name);
                        }


                    } catch (Exception e) {
                        Log.d("AsyncLoadCustDetails", e.getMessage());

                    }

                    return spinnerArray;
                }

                @Override
                protected void onPostExecute(ArrayList<String> spinnerArray) {
                    ArrayAdapter<String> spinnerArrayAdapter = new ArrayAdapter<String>(getApplicationContext(), R.layout.spinner_item, spinnerArray);
                    spinnerArrayAdapter.setDropDownViewResource(R.layout.spinner_item); // The drop down view
                    spCustomers.setAdapter(spinnerArrayAdapter);

                }



            }

            public class mySelectedListener implements AdapterView.OnItemSelectedListener {

                @Override
                public void onItemSelected(AdapterView parent, View view, int pos, long id) {



                    String value = (String) parent.getItemAtPosition(pos);
                    txtNaam.setText(value); //got the name working since it wasnt that hard
    //load the other details in the textviews

                }

                @Override
                public void onNothingSelected(AdapterView parent) {
                }

            }
        }

这是jsonObj的样子：

This is what the jsonObj looks like:

{
  "Successful": true,
  "Value": [
    {
      "Naam": "Google",
      "Adres": "Kerkstraat 3",
      "Postcode": "4455 AK Roosendaal",
      "Telefoon": "0165-559234",
      "Email": "[e-mail]",
      "Website": "www.google.nl"
    },
    {
      "Naam": "Apple",
      "Adres": "Kerkstraat 4",
      "Postcode": "4455 AD Roosendaal",
      "Telefoon": "0164-559234",
      "Email": "[e-mail]",
      "Website": "www.apple.nl"
    }
  ]
}

（仅2顾客，因为它的虚拟数据）

(Only 2 "customers", since its dummy data)

推荐答案

您可以将JsonArray转换为字符串如下：

You can convert the JsonArray to string as follow :

String jsonString = jsonArray.toString();

其保存在共享preference：

save it in shared preference :

                    SharedPreferences settings = getSharedPreferences(
                            "pref", 0);
                    SharedPreferences.Editor editor = settings.edit();
                    editor.putString("jsonString", jsonString);
                    editor.commit();

然后访问它在其他类。

And then access it in other class.

SharedPreferences settings = getSharedPreferences(
                            "pref", 0);
                    String jsonString= settings 
                            .getString("jsonString", null);

一旦获得字符串，将其转换回JsonArray：

Once you have obtained the String, convert it back to JsonArray :

JsonArray jsonArray = new JsonArray(jsonString);

这篇关于使用JSONArray另一个类？的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！