gistfile1.java

package com.aiman.listviewexample;

import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.io.UnsupportedEncodingException;
import java.util.List;

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.impl.client.DefaultHttpClient;
import org.json.JSONException;
import org.json.JSONObject;

import android.util.Log;

public class JSONParser {

	static InputStream is = null;
	static JSONObject jObj = null;
	static String json = "";

	// constructor
	public JSONParser() {

	}

	/**
	 * Making service call
	 * 
	 * @url - url to make request
	 * @method - http request method
	 * */
	public String makeHttpRequest(String url, String method) {
		return this.makeHttpRequest(url, method, null);
	}

	public JSONObject getJSONFromUrl(String url, List<NameValuePair> params) {
		// Making HTTP request
		try {
			// defaultHttpClient
			DefaultHttpClient httpClient = new DefaultHttpClient();
			HttpPost httpPost = new HttpPost(url);
			httpPost.setEntity(new UrlEncodedFormEntity(params));

			HttpResponse httpResponse = httpClient.execute(httpPost);
			HttpEntity httpEntity = httpResponse.getEntity();
			is = httpEntity.getContent();

		} catch (UnsupportedEncodingException e) {
			e.printStackTrace();
		} catch (ClientProtocolException e) {
			e.printStackTrace();
		} catch (IOException e) {
			e.printStackTrace();
		}

		try {
			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();
			json = sb.toString();
			Log.e("JSON", json);
		} catch (Exception e) {
			Log.e("Buffer Error", "Error converting result " + e.toString());
		}

		// try parse the string to a JSON object
		try {
			jObj = new JSONObject(json);
		} catch (JSONException e) {
			Log.e("JSON Parser", "Error parsing data " + e.toString());
		}

		// return JSON String
		return jObj;

	}

	// function get json from url
	// by making HTTP POST or GET mehtod
	public String makeHttpRequest(String url, String method,
			List<NameValuePair> params) {

		// Making HTTP request
		try {
			DefaultHttpClient httpClient = new DefaultHttpClient();
			// check for request method
			if (method == "POST") {
				HttpPost httpPost = new HttpPost(url);
				if (params != null) {
					httpPost.setEntity(new UrlEncodedFormEntity(params));
				}
				HttpResponse httpResponse = httpClient.execute(httpPost);
				HttpEntity httpEntity = httpResponse.getEntity();
				is = httpEntity.getContent();
			} else if (method == "GET") {
				if (params != null) {
					String paramString = URLEncodedUtils
							.format(params, "utf-8");
					url += "?" + paramString;
				}
				HttpGet httpGet = new HttpGet(url);
				// DefaultHttpClient httpClient = new
				// DefaultHttpClient(httpParameters);

				HttpResponse httpResponse = httpClient.execute(httpGet);
				HttpEntity httpEntity = httpResponse.getEntity();
				is = httpEntity.getContent();
			}

		} catch (UnsupportedEncodingException e) {
			e.printStackTrace();
		} catch (ClientProtocolException e) {
			e.printStackTrace();
		} catch (IOException e) {
			e.printStackTrace();
		}

		try {
			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();
			json = sb.toString();
		} catch (Exception e) {
			Log.e("Buffer Error", "Error converting result " + e.toString());
		}

		// return JSON String
		return json;

	}
}