JSON stands for JavaScript Object Notation.It is an independent data exchange format and is the best alternative for XML. This snippet will help you to parse JSON in Android.
You need to download and import Apache Http Client libraries from here: https://hc.apache.org/downloads.cgi?Preferred=http%3A%2F%2Fapache.arvixe.com%2F
Or add the line bellow in your build.gradle file.
You need to download and import Apache Http Client libraries from here: https://hc.apache.org/downloads.cgi?Preferred=http%3A%2F%2Fapache.arvixe.com%2F
Or add the line bellow in your build.gradle file.
android{
compileSdkVersion xx
buildToolsVersion 'xx.x.x'
useLibrary 'org.apache.http.legacy'
}
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| JSON Page |
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| JSON Data in Android Application |
Video Tutorial
JSONTool.java
import android.util.Log;
import org.apache.http.HttpEntity;
import org.apache.http.HttpResponse;
import org.apache.http.NameValuePair;
import org.apache.http.client.ClientProtocolException;
import org.apache.http.client.entity.UrlEncodedFormEntity;
import org.apache.http.client.methods.HttpGet;
import org.apache.http.client.methods.HttpPost;
import org.apache.http.client.utils.URLEncodedUtils;
import org.apache.http.cookie.Cookie;
import org.apache.http.impl.client.DefaultHttpClient;
import org.json.JSONArray;
import org.json.JSONException;
import org.json.JSONObject;
import java.io.*;
import java.net.HttpCookie;
import java.util.List;
/**
* Coded By AJITH KP [@ajithkp560]
* Visit: www.terminalcoders.blogspot.com
*/
public class JSONTool {
static InputStream is = null;
static JSONObject jobj = null;
static JSONArray jarr = null;
List<NameValuePair> params = null;
String url;
List<Cookie> cookies;
String strCookie;
String response;
String method="get";
boolean flg = false;
JSONTool(String u)
{
url = u;
}
JSONTool()
{
}
JSONTool(String u, List<NameValuePair> p)
{
params = p;
}
public void setUrl(String u)
{
url = u;
}
public void setParams(List<NameValuePair> p)
{
params = p;
}
public void setMethod(String m)
{
method = m.toLowerCase();
}
public JSONObject getJSONObject()
{
try
{
DefaultHttpClient httpClient = new DefaultHttpClient();
HttpEntity httpEntity = null;
HttpResponse httpResponse = null;
if(params==null)
{
HttpGet httpGet = new HttpGet(url);
if(flg)
{
httpGet.setHeader("Cookie",strCookie);
}
else {
cookies = httpClient.getCookieStore().getCookies();
}
httpResponse = httpClient.execute(httpGet);
}
else if(params!=null && method.equals("get"))
{
String paramString = URLEncodedUtils.format(params, "utf-8");
url+="?"+paramString;
HttpGet httpGet = new HttpGet(url);
if(flg)
{
httpGet.setHeader("Cookie", strCookie);
}
else {
cookies = httpClient.getCookieStore().getCookies();
}
httpResponse = httpClient.execute(httpGet);
}
else
{
HttpPost httpPost = new HttpPost(url);
if(flg)
{
httpPost.setHeader("Cookie", strCookie);
}
else {
cookies = httpClient.getCookieStore().getCookies();
}
httpPost.setEntity(new UrlEncodedFormEntity(params));
}
httpEntity = httpResponse.getEntity();
is = httpEntity.getContent();
if(!flg) {
cookies = httpClient.getCookieStore().getCookies();
}
BufferedReader reader = new BufferedReader(new InputStreamReader(is, "iso-8859-1"), 8);
StringBuilder sb = new StringBuilder();
String line = null;
while ((line = reader.readLine()) != null) {
sb.append(line + "\n");
}
is.close();
response = sb.toString();
Log.d("Message", response);
jobj = new JSONObject(response);
} catch (UnsupportedEncodingException e) {
e.printStackTrace();
} catch (ClientProtocolException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
} catch (JSONException e) {
e.printStackTrace();
}
return jobj;
}
public JSONObject getJSONObject(String u, List<NameValuePair> l, String m)
{
params = l;
method = m;
url = u;
try
{
DefaultHttpClient httpClient = new DefaultHttpClient();
HttpEntity httpEntity = null;
HttpResponse httpResponse = null;
if(params==null)
{
HttpGet httpGet = new HttpGet(url);
if(flg)
{
httpGet.setHeader("Cookie", strCookie);
}
else {
cookies = httpClient.getCookieStore().getCookies();
}
httpResponse = httpClient.execute(httpGet);
}
else if(params!=null && method.equals("get"))
{
String paramString = URLEncodedUtils.format(params, "utf-8");
url+="?"+paramString;
HttpGet httpGet = new HttpGet(url);
if(flg)
{
httpGet.setHeader("Cookie", strCookie);
}
else {
cookies = httpClient.getCookieStore().getCookies();
}
httpResponse = httpClient.execute(httpGet);
}
else
{
HttpPost httpPost = new HttpPost(url);
if(flg)
{
httpPost.setHeader("Cookie", strCookie+";");
}
else {
cookies = httpClient.getCookieStore().getCookies();
}
httpPost.setEntity(new UrlEncodedFormEntity(params));
httpResponse = httpClient.execute(httpPost);
}
httpEntity = httpResponse.getEntity();
is = httpEntity.getContent();
if(!flg) {
cookies = httpClient.getCookieStore().getCookies();
}
BufferedReader reader = new BufferedReader(new InputStreamReader(is, "iso-8859-1"), 8);
StringBuilder sb = new StringBuilder();
String line = null;
while ((line = reader.readLine()) != null) {
sb.append(line + "\n");
}
is.close();
response = sb.toString();
Log.d("Message", response);
jobj = new JSONObject(response);
} catch (UnsupportedEncodingException e) {
e.printStackTrace();
} catch (ClientProtocolException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
} catch (JSONException e) {
e.printStackTrace();
}
return jobj;
}
public String getString()
{
try
{
DefaultHttpClient httpClient = new DefaultHttpClient();
HttpEntity httpEntity = null;
HttpResponse httpResponse = null;
if(params==null)
{
HttpGet httpGet = new HttpGet(url);
if(flg)
{
httpGet.setHeader("Cookie", strCookie);
}
else {
cookies = httpClient.getCookieStore().getCookies();
}
httpResponse = httpClient.execute(httpGet);
}
else
{
HttpPost httpPost = new HttpPost(url);
if(flg)
{
httpPost.setHeader("Cookie", strCookie);
}
else {
cookies = httpClient.getCookieStore().getCookies();
}
httpPost.setEntity(new UrlEncodedFormEntity(params));
httpResponse = httpClient.execute(httpPost);
}
httpEntity = httpResponse.getEntity();
is = httpEntity.getContent();
BufferedReader reader = new BufferedReader(new InputStreamReader(is, "iso-8859-1"), 8);
StringBuilder sb = new StringBuilder();
String line = null;
while ((line = reader.readLine()) != null) {
sb.append(line + "\n");
}
is.close();
response = sb.toString();
Log.d("Message", response);
} catch (UnsupportedEncodingException e) {
e.printStackTrace();
} catch (ClientProtocolException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
}
return response;
}
public String getString(String u, List<NameValuePair> l, String m)
{
url = u;
params = l;
method = m.toLowerCase();
params = l;
method = m;
url = u;
try
{
DefaultHttpClient httpClient = new DefaultHttpClient();
HttpEntity httpEntity = null;
HttpResponse httpResponse = null;
if(params==null)
{
HttpGet httpGet = new HttpGet(url);
if(flg)
{
httpGet.setHeader("Cookie", strCookie);
}
else {
cookies = httpClient.getCookieStore().getCookies();
}
httpResponse = httpClient.execute(httpGet);
httpEntity = httpResponse.getEntity();
}
else if(params!=null && method.equals("get"))
{
String paramString = URLEncodedUtils.format(params, "utf-8");
url+="?"+paramString;
HttpGet httpGet = new HttpGet(url);
if(flg)
{
httpGet.setHeader("Cookie", strCookie);
}
else {
cookies = httpClient.getCookieStore().getCookies();
}
httpResponse = httpClient.execute(httpGet);
httpEntity = httpResponse.getEntity();
}
else
{
HttpPost httpPost = new HttpPost(url);
if(flg)
{
httpPost.setHeader("Cookie", strCookie);
}
else {
cookies = httpClient.getCookieStore().getCookies();
}
httpPost.setEntity(new UrlEncodedFormEntity(params));
httpResponse = httpClient.execute(httpPost);
httpEntity = httpResponse.getEntity();
}
is = httpEntity.getContent();
BufferedReader reader = new BufferedReader(new InputStreamReader(is, "iso-8859-1"), 8);
StringBuilder sb = new StringBuilder();
String line = null;
while ((line = reader.readLine()) != null) {
sb.append(line + "\n");
}
is.close();
response = sb.toString();
Log.d("Message", response);
} catch (UnsupportedEncodingException e) {
e.printStackTrace();
} catch (ClientProtocolException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
}
return response;
}
public List<Cookie> getCookies()
{
return cookies;
}
public void setCookies(String c)
{
strCookie = c;
flg = true;
}
}
How To Use
You can use the snippet in Android project. First save the code as JSONTool.java and import it to your package.
Constructors
JSONTool tool = new JSONTool(); //Without argument
tool.setUrl("http://10.0.2.2/json.php"); //Setting URL
JSONTool tool = new JSONTool("http://10.0.2.2/json.php");//With url argument
Set Parameter
tool.setParams(params);
Set Method
tool.setMethod("get"); //method="get"
tool.setMethod("post"); //method="post"
Getting JSONObject
JSONObject obj = tool.getJSONObject(); //You can use if the URL and Method is set. Else
JSONObject obj = tool.getJSONObject("http://10.0.2.2/json.php", params, "get");
Getting JSON String
String res = tool.getString(); //You can use if the URL and Method is set. Else
String res = tool.getString("http://10.0.2.2/json.php", params, "get");
Sample Code
package com.blogspot.terminal;
import android.app.Activity;
import android.os.AsyncTask;
import android.os.Bundle;
import android.widget.TextView;
import org.apache.http.NameValuePair;
import org.apache.http.message.BasicNameValuePair;
import org.json.JSONObject;
import java.util.ArrayList;
import java.util.List;
public class MyActivity extends Activity {
/**
* Called when the activity is first created.
*/
TextView v;
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
v = (TextView) findViewById(R.id.lbl);
new sendPostData().execute();
}
private class sendPostData extends AsyncTask<String, Void, String>
{
JSONTool jtool = new JSONTool();
String data;
@Override
protected String doInBackground(String... params) {
try{
List<NameValuePair> param = new ArrayList<NameValuePair>();
param.add(new BasicNameValuePair("name","Ajith"));
param.add(new BasicNameValuePair("mail","ajithkp560@gmail.com"));
JSONObject obj = jtool.getJSONObject("http://10.0.2.2/ajith/json.php", param, "post");
data = obj.getString("name")+" : "+obj.getString("email");
}catch(Exception e){
return new String("Exception: " + e.getMessage());
}
return data;
}
@Override
protected void onPostExecute(String result) {
//View your result here.
v.setText(result);
}
}
}
4 comments
Write commentsGood tutorial on json parser..... keep it up.....
Replygood tutorial on json parser. but video tutoial 'll be better.
Replythanks for your suggestion and i'll do it.. thanks and pls visit regularly... (f)
Replysimple json parser for android. thanks
Reply