I want to fetch json from [this link][1]: https://api.myjson.com/bins/38ln5 using retrofit
sample json is
{
"students": [
{
"id": "1",
"name": "Larzobispa"
},
{
"id": "2",
"name": "La Cibeles"
}
]
}
Please explain details how to do that. Thanks a lot, guys!
Retrofit will automatically parse JSON Object as well JSON Array.
@GET("/[email protected]")
public void responseString(Callback<Student> response);
your model class looks like:
public class Student{
private ArrayList<StudentInfo> studentList = new ArrayList<>();
//getter and setters
}
public class StudentInfo{
private String id;
private String name;
//getters and setters
}
Then in response:
@Override
public void onResponse(Response<Student> response, Retrofit retrofit) {
if (response.isSuccess()) {
Student student = response.body;
Log.e("Student name", student.getStudent().get(0).getName()); // do whatever you want
}else{
// get response.errorBody()
}
}
You can access both JSONArray and JSONObject using retrofit 2.0 in android. Here you want to access JSONArray using retrofit for which you should do following:
Interface Class:
package com.androidtutorialpoint.retrofitandroid;
import java.util.List;
import retrofit.Call;
import retrofit.http.GET;
/**
* Created by navneet on 4/6/16.
*/
public interface RetrofitArrayAPI {
/*
* Retrofit get annotation with our URL
* And our method that will return us details of student.
*/
@GET("api/RetrofitAndroidArrayResponse")
Call> getStudentDetails();
}
Above is the interface. Now to display JSONArray data on your smartphone screen call following function:
void getRetrofitArray() {
Retrofit retrofit = new Retrofit.Builder()
.baseUrl(url)
.addConverterFactory(GsonConverterFactory.create())
.build();
RetrofitArrayAPI service = retrofit.create(RetrofitArrayAPI.class);
Call> call = service.getStudentDetails();
call.enqueue(new Callback>() {
@Override
public void onResponse(Response> response, Retrofit retrofit) {
try {
List StudentData = response.body();
for (int i = 0; i<StudentData.size(); i++) {
if (i == 0) {
text_id_1.setText("StudentId : " + StudentData.get(i).getStudentId());
text_name_1.setText("StudentName : " + StudentData.get(i).getStudentName());
text_marks_1.setText("StudentMarks : " + StudentData.get(i).getStudentMarks());
} else if (i == 1) {
text_id_2.setText("StudentId : " + StudentData.get(i).getStudentId());
text_name_2.setText("StudentName : " + StudentData.get(i).getStudentName());
text_marks_2.setText("StudentMarks : " + StudentData.get(i).getStudentMarks());
}
}
} catch (Exception e) {
Log.d("onResponse", "There is an error");
e.printStackTrace();
}
}
@Override
public void onFailure(Throwable t) {
Log.d("onFailure", t.toString());
}
});
}
My POJO Class was following:
package com.androidtutorialpoint.retrofitandroid;
public class Student {
//Variables that are in our json
private int StudentId;
private String StudentName;
private String StudentMarks;
private int inStock;
//Getters and setters
public int getStudentId() {
return StudentId;
}
public void setStudentId(int bookId) {
this.StudentId = StudentId;
}
public String getStudentName() {
return StudentName;
}
public void setStudentName(String name) {
this.StudentName = StudentName;
}
public String getStudentMarks() {
return StudentMarks;
}
public void setStudentMarks(String price) {
this.StudentMarks = StudentMarks;
}
}
So in this way, you will be able to capture JSONArray from URL using Retrofit 2.0 and display that data on your screen.
I hope I am able to answer your query.
Credits: I read this tutorial on: AndroidTutorialPoint for Retrofit 2.0
