如何從給定鏈接使用Gson解析json數據

Question

鏈接： - http://api.androidhive.info/contacts/ 問題： - 從給定鏈接我能夠解析聯繫人屬性值，但無法解析電話屬性值。 代碼： -

class GetGSONdata extends AsyncTask<String, Integer, String> { 

     @Override 
     protected String doInBackground(String... params) { 
      try { 
       URL url = new URL("http://api.androidhive.info/contacts/"); 
       HttpURLConnection urlConnection = (HttpURLConnection) url.openConnection(); 
       int responsecode = urlConnection.getResponseCode(); 
       Log.e("responsecode", responsecode + ""); 
       InputStreamReader inputStreamReader = new InputStreamReader(urlConnection.getInputStream(), "UTF-8"); 
       Gson gson = new Gson(); 
       JsonReader reader = new JsonReader(inputStreamReader); 
       reader.beginObject(); 
       while (reader.hasNext()) { 
        String aname = reader.nextName(); 
        Log.e("Array name", aname); 
        if (aname.equalsIgnoreCase("contacts")) { 
         reader.beginArray(); 
         while (reader.hasNext()) { 
          Contacts contacts = gson.fromJson(reader, Contacts.class); 
          list.add(contacts); 
         } 
        } 
       } 
       reader.endObject(); 
       reader.close(); 
      } catch (Exception e) { 
       Log.e("Exception test", e.toString()); 
      } 

for (int i = 0; i < list.size(); i++) { 
       Log.e("json data", list.get(i).getId() + " " + list.get(i).getName()); 

      } 
      return null; 
     } 
    } 


    public class Contacts { 
     private String id; 
     private String name; 
     private String email; 

     public String getId() { 
      return id; 
     } 

     public void setId(String id) { 
      this.id = id; 
     } 

     public String getName() { 
      return name; 
     } 

     public void setName(String name) { 
      this.name = name; 
     } 

     public String getEmail() { 
      return email; 
     } 

     public void setEmail(String email) { 
      this.email = email; 
     } 

     class Phone{ 
      private String mobile; 
      private String home; 
      private String office; 

      public String getMobile() { 
       return mobile; 
      } 

      public void setMobile(String mobile) { 
       this.mobile = mobile; 
      } 

      public String getHome() { 
       return home; 
      } 

      public void setHome(String home) { 
       this.home = home; 
      } 

      public String getOffice() { 
       return office; 
      } 

      public void setOffice(String office) { 
       this.office = office; 
      } 
     } 

    } 

謝謝。

Answer 1

在您的Contacts類中有Phone類的實例。

public class Contacts{ 
    private Phone phone; 
    private String id; 
    private String name; 
    private String email; 
    private String address; 
    private String gender; 

    // Getters & Setters 

} 
public class Phone{ 
     private String mobile; 
     private String home; 
     private String office; 

     // Getters & Setters 
    } 

這應該有效。

Answer 2

我會建議使用本網站來創建POJO類這樣你就不會在未來 http://www.jsonschema2pojo.org/

Answer 3

 result // result is string Json data which is get from sever(Async Task post Execute result) 

      Gson gson = new Gson(); 

      Reader reader; 

      try { 
       reader = new InputStreamReader(new ByteArrayInputStream(
         result.getBytes("UTF-8"))); 
       Type Collectiontype = new TypeToken<Contact>() { 
       }.getType(); 
     Contact lstContact = gson.fromJson(reader, Collectiontype); 
     //Contact is pojo class 

Use this link for create pojo file and then refer this code