How to fetch JSON array without any key in Retrofit (Android)?

You Can define a Class representing the JSON Object

import com.google.gson.annotations.Expose;import com.google.gson.annotations.SerializedName;public class Meeting{@SerializedName("Type")@Exposeprivate String type;@SerializedName("Name")@Exposeprivate String name;@SerializedName("StartDate")@Exposeprivate String startDate;@SerializedName("EndDate")@Exposeprivate String endDate;public String getType() {return type;}public void setType(String type) {this.type = type;}public String getName() {return name;}public void setName(String name) {this.name = name;}public String getStartDate() {return startDate;}public void setStartDate(String startDate) {this.startDate = startDate;}public String getEndDate() {return endDate;}public void setEndDate(String endDate) {this.endDate = endDate;}}

after that you define Callback for retrofit like thatCall<List<Meeting>> getMeetings();

if you are using Gson parsing then simple do it like this

 var model = Gson().fromJson(response.body()!!.string(), Array<Meeting>::class.java).toList()

Json Response :

{"contacts":{"918888302649":0,"917207251056":0,"918888804581":0}}

POJO Class :

public class ContactSyncResponseModel {    @SerializedName("contacts")    @Expose    private Map<String, String> result;    public Map<String, String> getResult() {        return result;    }    public void setResult(Map<String, String> result) {        this.result = result;    } }