VkApi。 JSONException

我想顯示我的朋友的名單。我不明白爲什麼字符串不能轉換爲json。我明白在152（MainActivity）該錯誤VkApi。 JSONException

JSONObject o = new JSONObject(response.toString());

，但我不知道爲什麼...

JSONException: Value [email protected] of type java.lang.String cannot be converted to JSONObject

在日誌這種反應顯示響應：

{ 
    "response": { 
     "count": 40, 
     "items": [{ 
        "id": 10543136, 
        "first_name": "Филип", 
        "last_name": "Канна", 
        "sex": 2, 
        "city": { 
         "id": 1710959, 
         "title": "Кишинев" 
        }, 
        "online": 0 
       }, ........

如何JSON外觀像VK服務器

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 Mai nActivity

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) { 
}}

我的模型朋友

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; 
    } 
    }

我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; 
} }

錯誤

10-25 22:57:33.130 31812-31812/standandroid.ru.vktestapi W/System.err﹕ org.json.JSONException: Value [email protected] 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

來源

2014-10-30 VdovinN

這

JSONObject o = new JSONObject(response.toString());

應該是這樣的：

JSONObject o = new JSONObject(response.responseString);

因爲你試圖將對象轉換爲字符串。並且它的toString方法將返回不是json的[email protected]。

編輯乾脆把事情：

你JSON是一個對象。所以你可以開始解析它，如：JSONObject o = new JSONObject(response.toString());。如果你想獲得所有你需要的朋友來迭代它內部的一個數組。

對於您可以這樣做：

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); 
}

這是簡單的JSON解析和你應該能夠都由你自己做到這一點。您對理解後面的結構有任何困難，可能要開始閱讀一些教程。這是一個很好的開始：http://www.javacodegeeks.com/2013/10/android-json-tutorial-create-and-parse-json-data.html

來源

2014-10-30 15:26:00

非常感謝!!!但是另一個錯誤發生錯誤解析dataorg.json.JSONException：值{「count」：40，「items」：[{「last_name」：「 Канна」，「ID」：10543136，「FIRST_NAME」：「Филип」，「性」：2，「在線」：0，「城市」：{ 「ID」：1710959 「稱號」：「Кишинев」}， – VdovinN 2014-10-30 15:42:44

BE因爲這不是一個數組，你試圖把它解析爲一個數組。 – 2014-10-30 15:43:51

@VovovN如果答案對你有幫助，至少給點贊。因爲那是你遇到的另一個問題。 – joao2fast4u 2014-10-30 15:44:18

VkApi。 JSONException

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