如何從JSON響應

Question

我想要檢索的JSON響應內對象的子對象，我的JSON POJO看起來像這樣：

public class Pojo { 
    private String token; 
    private User user; 

    public Pojo() 
    {} 
    public Pojo(String username, String password,User user) { 
     user.setUsername(username); 
     user.setPassword(password); 
     this.user = user; 
    } 

    public String getToken() {return token;} 
    public void setToken(String token) {this.token = token;} 
    public User getUser() {return user;} 
    public void setUser(User user) {this.user = user;} 

和我innerobjct用戶看起來是這樣的：

public class User { 

      private String username 

; 
     private String name; 
     private String phone; 
     private String email; 
     private String password; 
     private String is_Active; 
} 

與他們的getter和setter方法

這是我的登錄代碼：

public void onLogin(View view){ 

     final ProgressDialog dialog = ProgressDialog.show(this, "", "loading..."); 
     EndpointInterface loginService = ServiceAuthGenerator.createService(EndpointInterface.class); 
     Password = tv_Password.getText().toString(); 
     Username = tv_Username.getText().toString(); 
     User usr = new User(); 
     Pojo user = new Pojo(Username,Password,usr); 
     Call<Pojo> call = loginService.getToken(usr); 
     call.enqueue(new Callback<Pojo>() { 
      @Override 
      public void onResponse(Response<Pojo> response, Retrofit retrofit) { 
       dialog.dismiss(); 
       if (response.isSuccess()) { 
        Pojo user = response.body(); 
        if(user.getUser().getIs_Active()=="True") { 
         Intent intent = new Intent(getApplicationContext(), MainMenu.class); 
         startActivity(intent); 
        } 
        else{ 
         Toast.makeText(getApplicationContext(), "Wrong User or Password", Toast.LENGTH_SHORT).show(); 
        } 
       } 
      } 
      @Override 
      public void onFailure(Throwable t) { 
       dialog.dismiss(); 
       Toast.makeText(getApplicationContext(), "Error Conection", Toast.LENGTH_SHORT).show(); 
      } 
     }); 
    } 

響應正在添加是這樣的：

{ 
"token":"tokengfsgfds" 
"user":{ 
    "username":"exmplename" 
    "email":"@gomail.com" 
    "is_active":"True" 
    } 
} 

我可以檢索令牌，但是當我試圖從用戶的內部對象我的應用程序無法得到變量。謝謝！

Answer 1

這只是鏡子模型類使用GSON庫

Pojo.java

import com.google.gson.annotations.SerializedName; 

public class Pojo { 

@SerializedName("token") 
private String token; 

@SerializedName("user") 
private User user; 

public Pojo(String username, String password,User user) { 
    // TODO Auto-generated constructor stub 
    user.setUsername(username); 
    user.setPassword(password); 
    this.token = "tokengfsgfds"; 
    this.user = user; 
} 

public String getToken() { 
    return token; 
} 

public void setToken(String token) { 
    this.token = token; 
} 

public User getUser() { 
    return user; 
} 

public void setUser(User user) { 
    this.user = user; 
} 
} 

取用戶從一個POJO再拍類User.java

import com.google.gson.annotations.SerializedName; 


public class User { 

@SerializedName("username") 
private String username; 

@SerializedName("name") 
private String name; 

@SerializedName("phone") 
private String phone; 

@SerializedName("email") 
private String email; 

@SerializedName("password") 
private String password; 

@SerializedName("is_Active") 
private boolean is_active; 

public String getUsername() { 
    return username; 
} 

public void setUsername(String username) { 
    this.username = username; 
} 

public String getName() { 
    return name; 
} 

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

public String getPhone() { 
    return phone; 
} 

public void setPhone(String phone) { 
    this.phone = phone; 
} 

public String getEmail() { 
    return email; 
} 

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

public String getPassword() { 
    return password; 
} 

public void setPassword(String password) { 
    this.password = password; 
} 

public boolean isIs_active() { 
    return is_active; 
} 

public void setIs_active(boolean is_active) { 
    this.is_active = is_active; 
} 
} 

我用GSON但​​代碼輸出應該是相同的

import com.google.gson.Gson; 

public class TestTwo { 
public static void main(String[] args) { 
    User user = new User(); 
    user.setEmail("someone@gmailcom"); 
    user.setIs_active(true); 
    user.setName("Cristian"); 
    user.setPassword("Cam"); 
    user.setPhone("1234123441"); 
    user.setUsername("cam.cri"); 

    Pojo pojo = new Pojo("cam.cri", "Cam", user); 

    String result = (new Gson()).toJson(pojo); 
    System.out.println(""+result); 

    Pojo pojo2 = (new Gson()).fromJson(result, Pojo.class); 

    System.out.println("Token: \t"+pojo2.getToken()); 
    System.out.println("email: \t"+pojo2.getUser().getEmail()); 
    System.out.println("is_active: \t"+pojo2.getUser().isIs_active()); 
    System.out.println("Name: \t"+pojo2.getUser().getName()); 
    System.out.println("Password: \t"+pojo2.getUser().getPassword()); 
    System.out.println("phone: \t"+pojo2.getUser().getPhone()); 
    System.out.println("Username: \t"+pojo2.getUser().getUsername()); 

} 
} 

---

輸出

{ 
    "token": "tokengfsgfds", 
    "user": { 
"username": "cam.cri", 
"name": "Cristian", 
"phone": "1234123441", 
"email": "someone@gmailcom", 
"password": "Cam", 
"is_Active": true 
    } 
    } 

輸出

Token: tokengfsgfds 
email:  someone@gmailcom 
is_active: true 
Name:  Cristian 
Password: Cam 
phone:  1234123441 
Username: cam.cri