I want to display my friend's list.I don't understand why String cannot converted to json. I understand that error in 152(MainActivity)
JSONObject o = new JSONObject(response.toString());
but i don't know why...
JSONException: Value com.vk.sdk.api.VKResponse@42b49418 of type java.lang.String cannot be converted to JSONObject
In logs this response show Response:
{
"response": {
"count": 40,
"items": [{
"id": 10543136,
"first_name": "Филип",
"last_name": "Канна",
"sex": 2,
"city": {
"id": 1710959,
"title": "Кишинев"
},
"online": 0
}, ........
How JSON looks like VK server
response: {
count: 693,
items: [{
id: 1987761,
first_name: 'Александром',
last_name: 'Мирмильштейном',
sex: 2,
city: {
id: 60,
title: 'Казань'
},
online: 0
}, {
id: 153796,
first_name: 'Александром',
last_name: 'Москалюком',
sex: 2,
city: {
id: 1568,
title: 'Черновцы'
},
online: 0
}, {
id: 10741,
first_name: 'Александром',
last_name: 'Мынзой',
sex: 2,
city: {
id: 1,
title: 'Москва'
},
online: 0
}]
}
My MainActivity
public class MainActivity extends Activity {
TextView text;
getFriendTask task;
ListView listView1;
VKAccessToken token;
ArrayList<Friend> friendArrayList;
ArrayAdapter<Friend> adapter;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
VKUIHelper.onCreate(this);
VKSdk.initialize(listener, "4571964");
VKSdk.authorize(new String[]{"friends"});
text=(TextView)findViewById(R.id.txt);
}
public void FriendClick(View view) {
friendArrayList=new ArrayList<Friend>();
task=new getFriendTask();
task.execute();
listView1=(ListView)findViewById(R.id.list);
adapter=new FriendAdapter(getApplicationContext(), R.layout.friendlist, friendArrayList);
listView1.setAdapter(adapter);
}
class getFriendTask extends AsyncTask<Void, Void, Void> {
protected void onPostExecute(Void result){
super.onPostExecute(result);
adapter.notifyDataSetChanged();
}
@Override
protected Void doInBackground(Void... params) {
if(listener!=null) {
VKRequest request = new VKRequest("friends.get", VKParameters.from(VKApiConst.FIELDS, "first_name, last_name, sex, bdate, city"));
request.start();
request.executeWithListener(new VKRequest.VKRequestListener() {
@Override
public void onComplete(VKResponse response) {
super.onComplete(response);
Toast.makeText(MainActivity.this, response.responseString, Toast.LENGTH_LONG).show();
try{
JSONObject o = new JSONObject(response.toString());
JSONArray jsonArray = o.getJSONArray("response");
for (int i = 0; i < jsonArray.length(); i++) {
JSONObject jsonObject = jsonArray.getJSONObject(i);
Friend fr = new Friend();
fr.setFirst_name(jsonObject.getString("first_name"));
fr.setLast_name(jsonObject.getString("last_name"));
fr.setSex(jsonObject.getString("sex"));
fr.setBdate(jsonObject.getString("bdate"));
fr.setCity(jsonObject.getString("city"));
friendArrayList.add(fr);
}
}catch (JSONException e){
e.printStackTrace();
}
Log.i("Are You Ready???", "Response - "+response.responseString);
}
@Override
public void onError(VKError error) {
super.onError(error);
Log.i("Are You Ready to Fly???", "EEEror - "+error.errorMessage);
}
@Override
public void attemptFailed(VKRequest request, int attemptNumber, int totalAttempts) {
super.attemptFailed(request, attemptNumber, totalAttempts);
}
});
}
return null;
}
}
VKSdkListener listener=new VKSdkListener() {
@Override
public void onCaptchaError(VKError vkError) {
}
@Override
public void onTokenExpired(VKAccessToken vkAccessToken) {
}
@Override
public void onAccessDenied(VKError vkError) {
Log.d("Gooooo", " My error - "+vkError.errorMessage);
}
public void onReceiveNewToken(VKAccessToken newToken){
Log.d("Gooooo", "My token - "+newToken.accessToken);
token=newToken;
}
};
@Override
protected void onResume() {
super.onResume();
VKUIHelper.onResume(this);
}
@Override
protected void onDestroy() {
super.onDestroy();
VKUIHelper.onDestroy(this);
}
@Override
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
super.onActivityResult(requestCode, resultCode, data);
VKUIHelper.onActivityResult(requestCode, resultCode, data);
}
public void onAutoClick(View view) {
}}
My Model Friend
class Friend{
String first_name;
String last_name;
String sex;
String bdate;
String city;
public Friend(){}
public Friend(String first_name, String last_name, String sex, String bdate, String city){
super();
this.first_name=first_name;
this.last_name=last_name;
this.sex=sex;
this.bdate=bdate;
this.city=city;
}
public String getFirst_name(){
return first_name;
}
public void setFirst_name(String first_name){
this.first_name=first_name;
}
public String getLast_name(){
return last_name;
}
public void setLast_name(String last_name){
this.last_name=last_name;
}
public String getSex(){
return sex;
}
public void setSex(String sex){
this.sex=sex;
}
public String getBdate(){
return bdate;
}
public void setBdate(String bdate){
this.bdate=bdate;
}
public String getCity(){
return city;
}
public void setCity(String city){
this.city=city;
}
}
My FriendAdapter
public class FriendAdapter extends ArrayAdapter<Friend> {
ArrayList<Friend> friendArrayList;
LayoutInflater inflater;
int Resource;
ViewHolder holder = new ViewHolder();
public FriendAdapter(Context context, int resource, ArrayList<Friend> objects) {
super(context, resource, objects);
inflater=(LayoutInflater)context.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
Resource=resource;
friendArrayList=objects;
}
@Override
public View getView(int position, View convertView, ViewGroup parent){
View view=convertView;
if(view==null){
holder=new ViewHolder();
view=inflater.inflate(Resource, null);
holder.name=(TextView)view.findViewById(R.id.fname);
holder.laname=(TextView)view.findViewById(R.id.lname);
holder.s=(TextView)view.findViewById(R.id.sx);
holder.b=(TextView)view.findViewById(R.id.bd);
holder.c=(TextView)view.findViewById(R.id.ct);
view.setTag(holder);
}else{
holder=(ViewHolder) view.getTag();
}
holder.name.setText(friendArrayList.get(position).getFirst_name());
holder.laname.setText(friendArrayList.get(position).getLast_name());
holder.s.setText(friendArrayList.get(position).getSex());
holder.b.setText(friendArrayList.get(position).getBdate());
holder.c.setText(friendArrayList.get(position).getCity());
return view;
}
static class ViewHolder {
public TextView name;
public TextView laname;
public TextView s;
public TextView b;
public TextView c;
} }
Error
10-25 22:57:33.130 31812-31812/standandroid.ru.vktestapi W/System.err﹕ org.json.JSONException: Value com.vk.sdk.api.VKResponse@42b40ac0 of type java.lang.String cannot be converted to JSONObject
10-25 22:57:33.130 31812-31812/standandroid.ru.vktestapi W/System.err﹕ at org.json.JSON.typeMismatch(JSON.java:111)
10-25 22:57:33.130 31812-31812/standandroid.ru.vktestapi W/System.err﹕ at org.json.JSONObject.<init>(JSONObject.java:158)
10-25 22:57:33.130 31812-31812/standandroid.ru.vktestapi W/System.err﹕ at org.json.JSONObject.<init>(JSONObject.java:171)
10-25 22:57:33.140 31812-31812/standandroid.ru.vktestapi W/System.err﹕ at standandroid.ru.vktestapi.MainActivity$getFriendTask$1.onComplete(MainActivity.java:152)
10-25 22:57:33.140 31812-31812/standandroid.ru.vktestapi W/System.err﹕ at com.vk.sdk.api.VKRequest$3.run(VKRequest.java:459)
10-25 22:57:33.150 31812-31812/standandroid.ru.vktestapi W/System.err﹕ at android.os.Handler.handleCallback(Handler.java:730)
10-25 22:57:33.150 31812-31812/standandroid.ru.vktestapi W/System.err﹕ at android.os.Handler.dispatchMessage(Handler.java:92)
10-25 22:57:33.150 31812-31812/standandroid.ru.vktestapi W/System.err﹕ at android.os.Looper.loop(Looper.java:137)
10-25 22:57:33.150 31812-31812/standandroid.ru.vktestapi W/System.err﹕ at android.app.ActivityThread.main(ActivityThread.java:5137)
10-25 22:57:33.150 31812-31812/standandroid.ru.vktestapi W/System.err﹕ at java.lang.reflect.Method.invokeNative(Native Method)
10-25 22:57:33.150 31812-31812/standandroid.ru.vktestapi W/System.err﹕ at java.lang.reflect.Method.invoke(Method.java:525)
10-25 22:57:33.150 31812-31812/standandroid.ru.vktestapi W/System.err﹕ at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:756)
10-25 22:57:33.150 31812-31812/standandroid.ru.vktestapi W/System.err﹕ at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:572)
10-25 22:57:33.150 31812-31812/standandroid.ru.vktestapi W/System.err﹕ at miui.dexspy.DexspyInstaller.main(DexspyInstaller.java:171)
10-25 22:57:33.160 31812-31812/standandroid.ru.vktestapi W/System.err﹕ at dalvik.system.NativeStart.main(Native Method)
10-25 22:57:33.160 31812-31812/standandroid.ru.vktestapi I/Are You Ready???﹕ Response - {"response":{"count":40,"items":[{"id":10543136,"first_name":"Филип","last_name":"Канна","sex":2,"city":{"id":1710959,"title":"Кишинев"},"online":0},{"id":12567913,"first_name":"Юлия","last_name":"Мурашева","sex":1,"bdate":"4.4","city":{"id":1710959,"title":"Кишинев"},"online":1},{"id":15349233,"first_name":"Алёна","last_name":"Волкова","sex":1,"bdate":"31.3","city":{"id":1710959,"title":"Кишинев"},"online":1},{"id":15890365,"first_name":"Алиса","last_name":"Голдур","sex":1,"bdate":"25.2","city":{"id":1710959,"title":"Кишинев"},"online":0},{"id":17445476,"first_name":"Лена","last_name":"Стурза","sex":1,"bdate":"6.3.1995","online":1},{"id":20855237,"first_name":"Никита","last_name":"Чукля","sex":2,"online":1},{"id":22441902,"first_name":"Максим","last_name":"Чакир","sex":2,"bdate":"4.1.1994","city":{"id":1710959,"title":"Кишинев"},"online":1},{"id":23260033,"first_name":"Катя","last_name":"Кузьмина","sex":1,"bdate":"27.6.1994","city":{"id":1710959,"title":"Кишинев"},"online":0},{"id":24891252,"first_name":"Арина","last_name":"Горобец","sex":1,"bdate":"20.12.1994","city":{"id":1710959,"title":"Кишинев"},"online":1},{"id":33387222,"first_name":"Алёна","last_name":"Миколюк","sex":1,"bdate":"14.10","city":{"id":292,"title":"Одесса"},"online":1},{"id":38467274,"first_name":"Андрей","last_name":"Тросиненко","sex":2,"bdate":"19.3","online":0},{"id":38733273,"first_name":"Миха","last_name":"Романчук","sex":1,"bdate":"2.6.1937","city":{"id":1710959,"title":"Кишинев"},"online":0},{"id":39117080,"first_name":"Рома","last_name":"Беженарь","sex":2,"bdate":"14.10","city":{"id":1710959,"title":"Кишинев"},"online":1},{"id":45171519,"first_name":"Александр","last_name":"Огурцов","sex":2,"bdate":"22.6.1994","city":{"id":1710959,"title":"Кишинев"},"online":0},{"id":47147705,"first_name":"Никита","last_name":"Драгуцану","sex":2,"bdate":"28.12","city":{"id":1710959,"title":"Кишинев"},"online":0},{"id":58606740,"first_name":"Франческа","last_name":"Канна","sex":1,"bdate":"25.1","city":{"id":1710959,"title":"Кишинев"},"online":0},{"id":62678153,"first_name":"Лёша","last_name":"Кугут","sex":2,"city":{"id":1710959,"title":"Кишинев"},"online":0},{"id":67485434,"first_name":"Ирина","last_name":"Трапезникова","sex":1,"bdate":"15.7","city":{"id":1710959,"title":"Кишинев"},"online":1},{"id":76249958,"first_name":"Никита","last_name":"Литвинов","sex":2,"online":1},{"id":78574119,"first_name":"Женя","last_name":"Чередниченко","sex":2,"city":{"id":1710959,"title":"Кишинев"},"online":0},{"id":87816032,"first_name":"Саша","last_name":"Сергунин","sex":2,"bdate":"28.5.1994","city":{"id":1710959,"title":"Кишинев"},"online":0},{"id":91235673,"first_name":"Вадим","last_name":"Барский","sex":2,"bdate":"22.6.1994","city":{"id":1908479,"title":"Antananarivo"},"online":1},{"id":94373404,"first_name":"Никита","last_name":"Головко","sex":2,"bdate":"29.1","city":{"id":1710959,"title":"Кишинев"},"online":1},{"id":101047911,"first_name":"Алексей","last_name":"Кицак","sex":2,"bdate":"12.5","city":{"id":1710959,"title":"Кишинев"},"online":1},{"id":101208573,"first_name":"Глеб","last_name":"Глинянов","deactivated":"deleted","sex":2,"online":0},{"id":108330289,"first_name":"Саша","last_name":"Руденко","sex":2,"bdate":"16.6","online":0},{"id":129188949,"first_name":"Роман","last_name":"Бугаян","sex":2,"city":{"id":1710959,"title":"Кишинев"},"online":0},{"id":139584680,"first_name":"Кристиан","last_name":"Мбала","sex":2,"bdate":"10.6","city":{"id":1710959,"title":"Кишинев"},"online":0},{"id":154083054,"first_name":"Оля","last_name":"За
This
JSONObject o = new JSONObject(response.toString());
Should be this:
JSONObject o = new JSONObject(response.responseString);
Because you're trying to convert an object to string. And it's toString method will return com.vk.sdk.api.VKResponse@42b40ac0 which is not json.
EDIT Simply putting things:
Your JSON is one object. So you can start by parsing it like: JSONObject o = new JSONObject(response.toString());. If you want to get all the friends you need to iterate an array that's inside it.
For that you can do:
JSONArray jsonArray = o.getJSONArray("items"); //the array is "items" not response.
for (int i = 0; i < jsonArray.length(); i++) { //simple iteration
JSONObject jsonObject = jsonArray.getJSONObject(i); //this contains 1 item
Friend fr = new Friend();
fr.setFirst_name(jsonObject.getString("first_name"));
fr.setLast_name(jsonObject.getString("last_name"));
fr.setSex(jsonObject.getString("sex")); //sex is an integer so you might want to change this
//fr.setBdate(jsonObject.getString("bdate"));//there is no such field "bdate" on this json
fr.setCity(jsonObject.getJSONObject("city").getString("title")); //city is an object. Not a string
friendArrayList.add(fr);
}
This is simple JSON parsing and you should be able to do it by youself. You have any trouble understanding the structure behind you might want to start reading some tutorials. This one is a good place to start: http://www.javacodegeeks.com/2013/10/android-json-tutorial-create-and-parse-json-data.html