Parse JSON Data In Android

Pradip Pandey

6y16.7k19100Article

AndroidParse JSONJSON data in AndroidParse JSON data

19 Comments

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Asfend Yar10y ago
good
Asfend Yar10y ago
can you give the real time example of json parsing
Asfend Yar10y ago
nice share
Iris Panabaker10y ago
love to share a json tool which help user to debug json data http://codebeautify.org/jsonviewer
Santhakumar Munuswamy10y ago
Thanks for nice article
Edu Muniz10y ago
good job. Thanks for share
- Pradip Pandey10y ago
  Thanks Edu Muniz
Humayun Kabir Mamun10y ago
Nice...
- Pradip Pandey10y ago
  Thanks Humayun Kabir Mamun
Mohammed Ibrahim10y ago
nice
- Pradip Pandey10y ago
  Thanks Mohammed Ibrahim
Kumaresh Rajalingam10y ago
Nice share
- Pradip Pandey10y ago
  Thanks Kumaresh Rajalingam
Ankur Mistry10y ago
helpful, thanks for sharing
- Pradip Pandey10y ago
  Thanks Ankur Mistry
Nanddeep Nachan10y ago
Nice share
- Pradip Pandey10y ago
  Thank You Nanddeep Nachan
Dinesh Beniwal10y ago
Good work Pandey G
- Pradip Pandey10y ago
  Thank You Dinesh Beniwal Sir

Introduction

JSON stands for JavaScript Object Notation. JSON is a light weight data interchange format in a text format so it can be easily parsed and read by machines and humans.

Parsing JSON data is important in Android. Create a new project on Android by using the following steps,

Step 1

Step 2

Step 3

Step 4

Step 5

JSON uses the following two types of different structures,

Collection of name/value pair
Array

Example of collection of name/value pair: The { (curly brace) represents the JSON object.

{"Employee" :{
"id":"1",
"name":"David",
"address":"Delhi",
"zip":"110002"}
}

Example of collection of array: The [ (square bracket ) represents the JSON array.

{
"Employee": [
{
"id": "1",
"name": "David",
"address": "Delhi",
"zip": "110002"
},
{
"id": "2",
"name": "John",
"address": "Mumbai",
"zip": "400001"
},
{
"id": "3",
"name": "Mathew",
"address": "Delhi",
"zip": "110003"
},
{
"id": "4",
"name": "Mary",
"address": "Delhi",
"zip": "110010"
}]
}

Complete Java class to parse JSON data.

{
"Employee": [
{
"id": "1",
"name": "David",
"address": "Delhi",
"zip": "110002"
},
{
"id": "2",
"name": "John",
"address": "Mumbai",
"zip": "400001"
},
{
"id": "3",
"name": "Mathew",
"address": "Delhi",
"zip": "110003"
},
{
"id": "4",
"name": "Mary",
"address": "Delhi",
"zip": "110010"
}]
}
package com.test.ppandey.jsonparse;
import android.support.v7.app.ActionBarActivity;
import android.os.Bundle;
import android.view.Menu;
import android.view.MenuItem;
import android.widget.TextView;
import org.json.JSONArray;
import org.json.JSONException;
import org.json.JSONObject;
public class MainActivity extends ActionBarActivity
{
@Override
protected void onCreate(Bundle savedInstanceState)
{
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
TextView output = (TextView) findViewById(R.id.textView1);
String strJson = "{\"Employee\" :[ {" + " \"id\":\"1\",\n" + "\"name\":\"David\",\n" + "\"address\":\"Delhi\", \n" + "\"zip\":\"110002\"}, {\n" + "\"id\":\"2\",\n" + "\"name\":\"John\",\n" + "\"address\":\"Mumbai\",\n" + "\"zip\":\"400001\"}, {\n" + "\"id\":\"3\",\n" + "\"name\":\"Mathew\",\n" + "\"address\":\"Delhi\",\n" + "\"zip\":\"110003\"}, {\n" + "\"id\":\"4\",\n" + "\"name\":\"Mary\",\n" + "\"address\":\"Delhi\",\n" + "\"zip\":\"110010\"} \n" + "]}";
String data = "";
try
{
JSONObject jsonRootObject = new JSONObject(strJson);
//Instance of JSONArray that contains JSONObjects
JSONArray jsonArray = jsonRootObject.optJSONArray("Employee");
//Iterate the jsonArray and print the information of the JSONObjects
for (int i = 0; i < jsonArray.length(); i++)
{
JSONObject jsonObject = jsonArray.getJSONObject(i);
int id = Integer.parseInt(jsonObject.optString("id").toString());
String name = jsonObject.optString("name").toString();
String address = jsonObject.optString("address").toString();
String zip = jsonObject.optString("zip").toString();
data += "Employee " + i + " : \n id= " + id + " \n Name= " + name + " \n Address= " + address + " \n zip=" + zip + "\n ";
}
output.setText(data);
}
catch (JSONException e)
{
e.printStackTrace();
}
}
@Override
public boolean onCreateOptionsMenu(Menu menu)
{
// Inflate the menu; this adds items to the action bar if it is present.
getMenuInflater().inflate(R.menu.menu_main, menu);
return true;
}
@Override
public boolean onOptionsItemSelected(MenuItem item)
{
// Handle action bar item clicks here. The action bar will
// automatically handle clicks on the Home/Up button, so long
// as you specify a parent activity in AndroidManifest.xml.
int id = item.getItemId();
//noinspection SimplifiableIfStatement
if (id == R.id.action_settings)
{
return true;
}
return super.onOptionsItemSelected(item);
}
}

In the above code, we created string containing JSON data and object of class JSONObject.

JSONObject jsonRootObject = new JSONObject(strJson);

And pass string containing JSON data to it.

The second step is to parse the JSON.

JSONArray jsonArray = jsonRootObject.optJSONArray("Employee");
int id = Integer.parseInt(jsonObject.optString("id").toString());
String name = jsonObject.optString("name").toString();
String address = jsonObject.optString("address").toString();
String zip = jsonObject.optString("zip").toString();

Run the application and we get the JSON data as in the following.