我似乎无法弄清楚,因为我只是这个android东西的初学者。
我的应用程序通过JSON从我的WebAPI获取客户名称。
现在,我尝试将其加载到微调器中,但是如何在其中加载JSON arraylist?
我尝试在其中加载custTable,但现在在微调器中显示“ com.jetron.jetronbuitendienst.CustomerDetailsTable .....”。
我的代码:
package com.jetron.jetronbuitendienst;
import android.annotation.TargetApi;
import android.os.AsyncTask;
import android.os.Build;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.util.Log;
import android.widget.ArrayAdapter;
import android.widget.Spinner;
import org.json.JSONArray;
import org.json.JSONObject;
import java.util.ArrayList;
import java.util.List;
public class Gegevens extends Main {
String Naam;
Spinner spCustomers;
private ArrayList<CustomerDetailsTable> Klanten;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_gegevens);
new AsyncLoadCustDetails().execute();
spCustomers = (Spinner) findViewById(R.id.spKlanten);
}
/**
* Set up the {@link android.app.ActionBar}, if the API is available.
*/
protected class AsyncLoadCustDetails extends
AsyncTask<Void, JSONObject, ArrayList<CustomerDetailsTable>> {
ArrayList<CustomerDetailsTable> custTable = null;
@Override
protected ArrayList<CustomerDetailsTable> doInBackground(Void... params) {
// TODO Auto-generated method stub
RestAPI api = new RestAPI();
try {
JSONObject jsonObj = api.GetCustomerDetails();
JSONParser parser = new JSONParser();
custTable = parser.parseCustomerDetails(jsonObj);
Log.d("Customers: ", jsonObj.toString());
} catch (Exception e) {
// TODO Auto-generated catch block
Log.d("AsyncLoadCustDetails", e.getMessage());
}
return custTable;
}
@Override
protected void onPostExecute(ArrayList<CustomerDetailsTable> result) {
// TODO Auto-generated method stub
// Application of the Array to the Spinner
ArrayAdapter<CustomerDetailsTable> spinnerArrayAdapter = new ArrayAdapter<CustomerDetailsTable>(getApplicationContext(), android.R.layout.simple_spinner_item, custTable);
spinnerArrayAdapter.setDropDownViewResource(android.R.layout.simple_spinner_dropdown_item); // The drop down view
spCustomers.setAdapter(spinnerArrayAdapter);
}
}
}
这是jsonObj:
D/Customers:: {"Successful":true,"Value":[{"Naam":"Google"},{"Naam":"Apple"},{"Naam":"AVN"},{"Naam":"Bemd"}]}
最佳答案
好吧,既然您得到了:
D/Customers:: {"Successful":true,"Value":[{"Naam":"Google"},{"Naam":"Apple"},{"Naam":"AVN"},{"Naam":"Bemd"}]}
这意味着您拥有一个名为Value的数组。因此,您可以执行以下操作:
声明公共变量:
private JSONObject jsonChildNode;
private JSONArray jsonMainNode;
private String name;
然后将代码修改为:
try {
JSONObject jsonObj = api.GetCustomerDetails();
JSONParser parser = new JSONParser();
custTable = parser.parseCustomerDetails(jsonObj);
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");
}
//and then you can add the name to a List<String> which will contain all the values of each item in the Value JSON Array.
} catch (Exception e) {
// TODO Auto-generated catch block
Log.d("AsyncLoadCustDetails", e.getMessage());
}
希望能帮助到你!!!