Android JSON Parsing From URL Example

Here you will get android json parsing from url example.

What I will do here?

First fetch json string from url.

Parse the json data and display in listview.

The data contains a json array with some fruits name as shown below.

{
"fruits":[
	"Apple",
	"Apricot",
	"Avocado",
	"Banana",
	"Bilberry",
	"Blackberry",
	"Blackcurrant",
	"Blueberry",
	"Boysenberry",
	"Currant",
	"Cherry",
	"Cherimoya",
	"Cloudberry",
	"Coconut",
	"Cranberry",
	"Custard apple",
	"Damson",
	"Date",
	"Dragonfruit",
	"Durian",
	"Elderberry",
	"Feijoa",
	"Fig",
	"Goji berry",
	"Gooseberry",
	"Grape",
	"Raisin",
	"Grapefruit",
	"Guava"
	]
}

{

"fruits":[

"Apple",

"Apricot",

"Avocado",

"Banana",

"Bilberry",

"Blackberry",

"Blackcurrant",

"Blueberry",

"Boysenberry",

"Currant",

"Cherry",

"Cherimoya",

"Cloudberry",

"Coconut",

"Cranberry",

"Custard apple",

"Damson",

"Date",

"Dragonfruit",

"Durian",

"Elderberry",

"Feijoa",

"Fig",

"Goji berry",

"Gooseberry",

"Grape",

"Raisin",

"Grapefruit",

"Guava"

]

}

Also Read: Picasso Android Tutorial – Load Image from URL

Android JSON Parsing From URL Example

Create a new android studio project with package name com.jsonparsing.

As we are fetching data from internet so we have to add internet access permission. Add following line of code in AndroidManifest.xml file.

<uses-permission android:name="android.permission.INTERNET" />

1	<uses-permission android:name="android.permission.INTERNET" />

I am using volley library in this example. It is a network library that is used to fetch data from server or internet. So add it to your project by adding following line of code in app level build.gradle file under dependencies section. After that sync the project.

compile 'com.android.volley:volley:1.0.0'

1	compile 'com.android.volley:volley:1.0.0'

The following code is responsible for fetching json data from url in the form of json string using volley library.

StringRequest request = new StringRequest(url, new Response.Listener<String>() {
            @Override
            public void onResponse(String string) {
                parseJsonData(string);
            }
        }, new Response.ErrorListener() {
            @Override
            public void onErrorResponse(VolleyError volleyError) {
                Toast.makeText(getApplicationContext(), "Some error occurred!!", Toast.LENGTH_SHORT).show();
                dialog.dismiss();
            }
        });

StringRequest request = new StringRequest(url, new Response.Listener<String>() {

@Override

public void onResponse(String string) {

parseJsonData(string);

}

}, new Response.ErrorListener() {

@Override

public void onErrorResponse(VolleyError volleyError) {

Toast.makeText(getApplicationContext(), "Some error occurred!!", Toast.LENGTH_SHORT).show();

dialog.dismiss();

}

});

When data is fetched successfully then onResponse() method is called.
If there is any error while fetching data then onErrorResponse() is called and an error message is displayed in toast.

After creating the volley request we have to add it to request queue.

RequestQueue rQueue = Volley.newRequestQueue(MainActivity.this);
rQueue.add(request);

1 2	RequestQueue rQueue = Volley.newRequestQueue(MainActivity.this); rQueue.add(request);

Now comes the parsing part. The parseJsonData() method contains the code to parse the json string.

void parseJsonData(String jsonString) {
        try {
            JSONObject object = new JSONObject(jsonString);
            JSONArray fruitsArray = object.getJSONArray("fruits");
            ArrayList al = new ArrayList();

            for(int i = 0; i < fruitsArray.length(); ++i) {
                al.add(fruitsArray.getString(i));
            }

            ArrayAdapter adapter = new ArrayAdapter(this, android.R.layout.simple_list_item_1, al);
            fruitsList.setAdapter(adapter);
        } catch (JSONException e) {
            e.printStackTrace();
        }

        dialog.dismiss();
    }

void parseJsonData(String jsonString) {

try {

JSONObject object = new JSONObject(jsonString);

JSONArray fruitsArray = object.getJSONArray("fruits");

ArrayList al = new ArrayList();

for(int i = 0; i < fruitsArray.length(); ++i) {

al.add(fruitsArray.getString(i));

}

ArrayAdapter adapter = new ArrayAdapter(this, android.R.layout.simple_list_item_1, al);

fruitsList.setAdapter(adapter);

} catch (JSONException e) {

e.printStackTrace();

}

dialog.dismiss();

}

First json string is parsed to json object. From this object a json array with name fruits is fetched.

Now each fruit is fetched from json array one by one inside loop and added to an arraylist.
Finally this list of fruits is assigned to listview using an adapter.

Below I have shared the full source code.

activity_main.xml

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:paddingBottom="@dimen/activity_vertical_margin"
    android:paddingLeft="@dimen/activity_horizontal_margin"
    android:paddingRight="@dimen/activity_horizontal_margin"
    android:paddingTop="@dimen/activity_vertical_margin"
    tools:context="com.jsonparsing.MainActivity">

    <ListView
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:id="@+id/fruitsList"/>
</RelativeLayout>

<?xml version="1.0" encoding="utf-8"?>

<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"

xmlns:tools="http://schemas.android.com/tools"

android:layout_width="match_parent"

android:layout_height="match_parent"

android:paddingBottom="@dimen/activity_vertical_margin"

android:paddingLeft="@dimen/activity_horizontal_margin"

android:paddingRight="@dimen/activity_horizontal_margin"

android:paddingTop="@dimen/activity_vertical_margin"

tools:context="com.jsonparsing.MainActivity">

<ListView

android:layout_width="match_parent"

android:layout_height="wrap_content"

android:id="@+id/fruitsList"/>

</RelativeLayout>

MainActivity.java

package com.jsonparsing;

import android.app.ProgressDialog;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.widget.ArrayAdapter;
import android.widget.ListView;
import android.widget.Toast;

import com.android.volley.RequestQueue;
import com.android.volley.Response;
import com.android.volley.VolleyError;
import com.android.volley.toolbox.StringRequest;
import com.android.volley.toolbox.Volley;

import org.json.JSONArray;
import org.json.JSONException;
import org.json.JSONObject;

import java.util.ArrayList;

public class MainActivity extends AppCompatActivity {
    ListView fruitsList;
    String url = "https://www.thecrazyprogrammer.com/example_data/fruits_array.json";
    ProgressDialog dialog;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);

        fruitsList = (ListView)findViewById(R.id.fruitsList);

        dialog = new ProgressDialog(this);
        dialog.setMessage("Loading....");
        dialog.show();

        StringRequest request = new StringRequest(url, new Response.Listener<String>() {
            @Override
            public void onResponse(String string) {
                parseJsonData(string);
            }
        }, new Response.ErrorListener() {
            @Override
            public void onErrorResponse(VolleyError volleyError) {
                Toast.makeText(getApplicationContext(), "Some error occurred!!", Toast.LENGTH_SHORT).show();
                dialog.dismiss();
            }
        });

        RequestQueue rQueue = Volley.newRequestQueue(MainActivity.this);
        rQueue.add(request);
    }

    void parseJsonData(String jsonString) {
        try {
            JSONObject object = new JSONObject(jsonString);
            JSONArray fruitsArray = object.getJSONArray("fruits");
            ArrayList al = new ArrayList();

            for(int i = 0; i < fruitsArray.length(); ++i) {
                al.add(fruitsArray.getString(i));
            }

            ArrayAdapter adapter = new ArrayAdapter(this, android.R.layout.simple_list_item_1, al);
            fruitsList.setAdapter(adapter);
        } catch (JSONException e) {
            e.printStackTrace();
        }

        dialog.dismiss();
    }
}

package com.jsonparsing;

import android.app.ProgressDialog;

import android.support.v7.app.AppCompatActivity;

import android.os.Bundle;

import android.widget.ArrayAdapter;

import android.widget.ListView;

import android.widget.Toast;

import com.android.volley.RequestQueue;

import com.android.volley.Response;

import com.android.volley.VolleyError;

import com.android.volley.toolbox.StringRequest;

import com.android.volley.toolbox.Volley;

import org.json.JSONArray;

import org.json.JSONException;

import org.json.JSONObject;

import java.util.ArrayList;

public class MainActivity extends AppCompatActivity {

ListView fruitsList;

String url = "https://www.thecrazyprogrammer.com/example_data/fruits_array.json";

ProgressDialog dialog;

@Override

protected void onCreate(Bundle savedInstanceState) {

super.onCreate(savedInstanceState);

setContentView(R.layout.activity_main);

fruitsList = (ListView)findViewById(R.id.fruitsList);

dialog = new ProgressDialog(this);

dialog.setMessage("Loading....");

dialog.show();

StringRequest request = new StringRequest(url, new Response.Listener<String>() {

@Override

public void onResponse(String string) {

parseJsonData(string);

}

}, new Response.ErrorListener() {

@Override

public void onErrorResponse(VolleyError volleyError) {

Toast.makeText(getApplicationContext(), "Some error occurred!!", Toast.LENGTH_SHORT).show();

dialog.dismiss();

}

});

RequestQueue rQueue = Volley.newRequestQueue(MainActivity.this);

rQueue.add(request);

}

void parseJsonData(String jsonString) {

try {

JSONObject object = new JSONObject(jsonString);

JSONArray fruitsArray = object.getJSONArray("fruits");

ArrayList al = new ArrayList();

for(int i = 0; i < fruitsArray.length(); ++i) {

al.add(fruitsArray.getString(i));

}

ArrayAdapter adapter = new ArrayAdapter(this, android.R.layout.simple_list_item_1, al);

fruitsList.setAdapter(adapter);

} catch (JSONException e) {

e.printStackTrace();

}

dialog.dismiss();

}

Screenshots

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7 thoughts on “Android JSON Parsing From URL Example”

Abdylai Xyepletovich
March 2, 2017 at 3:47 pm

Nice

tasarhane
June 7, 2017 at 11:07 am

Absolutely the best tutorial about json.
Thanks

Ninh
September 28, 2017 at 11:33 am

What if i only want to get an item form an array? what must i do? please help!

khan
February 9, 2018 at 6:55 am

Great Tutorial Keep the Good Work.

David Ridríguez
November 18, 2018 at 9:13 pm

How can i see with your code… “ñ” and “´” ?? In spanish is tipical use Ñ and á é í ó ú

meshal
December 17, 2020 at 2:23 pm

only first object is shown in output

dip
August 24, 2023 at 4:23 am

code is not working!! please put correct code here

Android JSON Parsing From URL Example

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7 thoughts on “Android JSON Parsing From URL Example”

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