کتابخانه Gson | آموزش کتابخانه Gson برای تبدیل جیسون در اندروید

  implementation 'com.google.code.gson:gson:2.8.5'

 @SerializedName

{"res":"this is result"
 ,"value":[
   {"name":"ali","lname":"karimi"
   ,"age":"22","city":"tehran"},
  
      {"name":"reza","lname":"karimi"
   ,"age":"22","city":"tehran"}
 ]
}

package dn.marjan.myprac;

import com.google.gson.annotations.Expose;
import com.google.gson.annotations.SerializedName;

import java.util.List;

public class test {

    @SerializedName("res")
    @Expose
    private String res;
    @SerializedName("value")
    @Expose
    private List<Value> value = null;

    public String getRes() {
        return res;
    }

    public void setRes(String res) {
        this.res = res;
    }

    public List<Value> getValue() {
        return value;
    }

    public void setValue(List<Value> value) {
        this.value = value;
    }

    public class Value {

        @SerializedName("name") 
        private String name;
        @SerializedName("lname") 
        private String lname;
        @SerializedName("age") 
        private String age;
        @SerializedName("city") 
        private String city;

        public String getName() {
            return name;
        }

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

        public String getLname() {
            return lname;
        }

        public void setLname(String lname) {
            this.lname = lname;
        }

        public String getAge() {
            return age;
        }

        public void setAge(String age) {
            this.age = age;
        }

        public String getCity() {
            return city;
        }

        public void setCity(String city) {
            this.city = city;
        }

    }
}

class test {

    @SerializedName("res") 
    var res: String? = null
    @SerializedName("value") 
    var value: List<Value>? = null

    inner class Value {

        @SerializedName("name") 
        var name: String? = null
        @SerializedName("lname") 
        var lname: String? = null
        @SerializedName("age") 
        var age: String? = null
        @SerializedName("city") 
        var city: String? = null

    }
}

toJson()

fromJson()

 public User getUserJs(String value){
        Gson gson = new Gson();
        JsonReader reader = new JsonReader(new StringReader(value));
        reader.setLenient(true);
        User data = new User();
        try{
            data = gson.fromJson(value,User.class);
        }catch (JsonSyntaxException e){
            e.printStackTrace();
        }
        return data;
    }

  fun getUserJs(value: String) :User{
            val gson = Gson()
            val reader = JsonReader(StringReader(value))
            reader.isLenient = true
            var data = User()
            try {
                  data = gson.fromJson<User>(reader, User::class.java)
            }catch (e: JsonSyntaxException){
                e.printStackTrace()
            }

            return data

        }

 public List<User> getUserListJs(String value) {
        Gson gson = new Gson();
        Type listType = new TypeToken<List<User>>() {
        }.getType();
        List<User> data = gson.fromJson(value, listType);
        return data;
    }

fun getDyDialogList(value: String) : List<DyDialog>{
            val gson = Gson()
            val listType = object : TypeToken<List<DyDialog>>() {}.type
            var data = ArrayList<DyDialog>()
            try {
                data = gson.fromJson<List<DyDialog>>(value, listType) as ArrayList<DyDialog>
            }catch (e: JsonSyntaxException){
                e.printStackTrace()
            }
            return data
        }