Android Retrofit没有回复

Question

我只是刚刚改装服务的新手，并按照本教程https://www.simplifiedcoding.net/retrofit-android-tutorial-to-get-json-from-server/它运作良好，并希望创建我自己的我使用了一个新的json网站http://api.androidhive.info/contacts/

{
"contacts": [
    {
            "id": "c200",
            "name": "Ravi Tamada",
            "email": "ravi@gmail.com",
            "address": "xx-xx-xxxx,x - street, x - country",
            "gender" : "male",
            "phone": {
                "mobile": "+91 0000000000",
                "home": "00 000000",
                "office": "00 000000"
            }
    },
    {
            "id": "c201",
            "name": "Johnny Depp",
            "email": "johnny_depp@gmail.com",
            "address": "xx-xx-xxxx,x - street, x - country",
            "gender" : "male",
            "phone": {
                "mobile": "+91 0000000000",
                "home": "00 000000",
                "office": "00 000000"
            }
    },
    {
            "id": "c202",
            "name": "Leonardo Dicaprio",
            "email": "leonardo_dicaprio@gmail.com",
            "address": "xx-xx-xxxx,x - street, x - country",
            "gender" : "male",
            "phone": {
                "mobile": "+91 0000000000",
                "home": "00 000000",
                "office": "00 000000"
            }
    },
    {
            "id": "c203",
            "name": "John Wayne",
            "email": "john_wayne@gmail.com",
            "address": "xx-xx-xxxx,x - street, x - country",
            "gender" : "male",
            "phone": {
                "mobile": "+91 0000000000",
                "home": "00 000000",
                "office": "00 000000"
            }
    },
    {
            "id": "c204",
            "name": "Angelina Jolie",
            "email": "angelina_jolie@gmail.com",
            "address": "xx-xx-xxxx,x - street, x - country",
            "gender" : "female",
            "phone": {
                "mobile": "+91 0000000000",
                "home": "00 000000",
                "office": "00 000000"
            }
    },
    {
            "id": "c205",
            "name": "Dido",
            "email": "dido@gmail.com",
            "address": "xx-xx-xxxx,x - street, x - country",
            "gender" : "female",
            "phone": {
                "mobile": "+91 0000000000",
                "home": "00 000000",
                "office": "00 000000"
            }
    },
    {
            "id": "c206",
            "name": "Adele",
            "email": "adele@gmail.com",
            "address": "xx-xx-xxxx,x - street, x - country",
            "gender" : "female",
            "phone": {
                "mobile": "+91 0000000000",
                "home": "00 000000",
                "office": "00 000000"
            }
    },
    {
            "id": "c207",
            "name": "Hugh Jackman",
            "email": "hugh_jackman@gmail.com",
            "address": "xx-xx-xxxx,x - street, x - country",
            "gender" : "male",
            "phone": {
                "mobile": "+91 0000000000",
                "home": "00 000000",
                "office": "00 000000"
            }
    },
    {
            "id": "c208",
            "name": "Will Smith",
            "email": "will_smith@gmail.com",
            "address": "xx-xx-xxxx,x - street, x - country",
            "gender" : "male",
            "phone": {
                "mobile": "+91 0000000000",
                "home": "00 000000",
                "office": "00 000000"
            }
    },
    {
            "id": "c209",
            "name": "Clint Eastwood",
            "email": "clint_eastwood@gmail.com",
            "address": "xx-xx-xxxx,x - street, x - country",
            "gender" : "male",
            "phone": {
                "mobile": "+91 0000000000",
                "home": "00 000000",
                "office": "00 000000"
            }
    },
    {
            "id": "c2010",
            "name": "Barack Obama",
            "email": "barack_obama@gmail.com",
            "address": "xx-xx-xxxx,x - street, x - country",
            "gender" : "male",
            "phone": {
                "mobile": "+91 0000000000",
                "home": "00 000000",
                "office": "00 000000"
            }
    },
    {
            "id": "c2011",
            "name": "Kate Winslet",
            "email": "kate_winslet@gmail.com",
            "address": "xx-xx-xxxx,x - street, x - country",
            "gender" : "female",
            "phone": {
                "mobile": "+91 0000000000",
                "home": "00 000000",
                "office": "00 000000"
            }
    },
    {
            "id": "c2012",
            "name": "Eminem",
            "email": "eminem@gmail.com",
            "address": "xx-xx-xxxx,x - street, x - country",
            "gender" : "male",
            "phone": {
                "mobile": "+91 0000000000",
                "home": "00 000000",
                "office": "00 000000"
            }
    }
]

我实现了自己的接口ContactAPI.java

public interface ContactsAPI {
@GET("/contacts/")
public void getContacts(Callback<List<Contact>> response);}

并实现了类似Contact.java的模型类

public class Contact {

@SerializedName("id")
@Expose
private String id;
@SerializedName("name")
@Expose
private String name;
@SerializedName("email")
@Expose
private String email;
@SerializedName("address")
@Expose
private String address;
@SerializedName("gender")
@Expose
private String gender;
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;}
public String getAddress() {return address;}
public void setAddress(String address) {this.address = address;}
public String getGender() {return gender;}
public void setGender(String gender) {this.gender = gender;}}

然后终于在MainActivity.class中实现了我的Restadapter

  public static final String ROOT_URL = "http://api.androidhive.info";
  private ListView listView;
  private List<Contact> contacts;
   RestAdapter adapter = new RestAdapter.Builder().setEndpoint(ROOT_URL).build();
    ContactsAPI api = adapter.create(ContactsAPI.class);

    api.getContacts(new Callback<List<Contact>>() {
        @Override
        public void success(List<Contact> list, Response response) {
            Toast.makeText(MainActivity.this,list.toString(),Toast.LENGTH_SHORT).show();
            showList();
        }

        @Override
        public void failure(RetrofitError error) {
            //you can handle the errors here
            Toast.makeText(MainActivity.this,"Error Occured:"+error.toString(),Toast.LENGTH_SHORT).show();
        }
    });

该应用程序运行顺利，但延迟4秒后，它将提出一个错误，即公共无效失败（RetrofitError错误）我不知道我错过了什么我检查了我的代码，找不到任何错误请帮助我提前感谢。

Answer 1

如果json是这样你需要一个类：

public class Contacts {
    @SerializedName("contacts")
    @Expose
    private List<Contact> contacts = new ArrayList<Contact>();

    /**
     *
     * @return
     * The contacts
     */
    public List<Contact> getContacts() {
        return contacts;
    }

    /**
     *
     * @param contacts
     * The contacts
     */
    public void setContacts(List<Contact> contacts) {
        this.contacts = contacts;
    }

}

也在你的界面ContactAPI.java中

public interface ContactsAPI {
    @GET("/contacts/")
    public void getContacts(Callback<Contacts> response);
}

另请检查此链接，因为“+”存在问题，此错误