post Server Data via HTTP - Android Network

Android examples for Network:HTTP Post

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Description

post Server Data via HTTP

Demo Code

/**/*  w  w  w  .  jav a2  s .  c o  m*/
 * Copyright (C) 2016 - Fran?ois LEPAROUX
 * <p/>
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 * <p/>
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 * <p/>
 * You should have received a copy of the GNU General Public License
 * along with this program.  If not, see <http://www.gnu.org/licenses/>.
 */
import android.content.Context;
import java.io.BufferedReader;
import java.io.BufferedWriter;
import java.io.IOException;
import java.io.InputStreamReader;
import java.io.OutputStream;
import java.io.OutputStreamWriter;
import java.io.UnsupportedEncodingException;
import java.net.HttpURLConnection;
import java.net.MalformedURLException;
import java.net.URL;
import java.net.URLEncoder;
import java.util.HashMap;
import java.util.Map;

public class Main{
    public static String postServerData(String sUrl,
            HashMap<String, String> postDataParams, Context ctx) {

        String result = "";
        URL url = null;

        if (Utilities.isOnline(ctx)) {
            try {
                url = new URL(sUrl);
                try {

                    HttpURLConnection httpURLConnection = (HttpURLConnection) url
                            .openConnection();
                    httpURLConnection.setRequestMethod("POST");
                    httpURLConnection.setReadTimeout(10000);
                    httpURLConnection.setConnectTimeout(15000);
                    httpURLConnection.setDoInput(true);
                    httpURLConnection.setDoOutput(true);

                    if (postDataParams != null) {
                        OutputStream os = httpURLConnection
                                .getOutputStream();
                        BufferedWriter writer = new BufferedWriter(
                                new OutputStreamWriter(os, "UTF-8"));
                        writer.write(getPostDataString(postDataParams));

                        writer.flush();
                        writer.close();
                        os.close();
                    }
                    int responseCode = httpURLConnection.getResponseCode();

                    if (responseCode == HttpURLConnection.HTTP_OK) {
                        String line;
                        BufferedReader br = new BufferedReader(
                                new InputStreamReader(
                                        httpURLConnection.getInputStream()));
                        while ((line = br.readLine()) != null) {
                            result += line;
                        }
                    }

                } catch (IOException e) {
                    e.printStackTrace();
                }
            } catch (MalformedURLException e) {
                e.printStackTrace();
            }
        }

        return result;
    }
    private static String getPostDataString(HashMap<String, String> params)
            throws UnsupportedEncodingException {
        StringBuilder result = new StringBuilder();
        boolean first = true;
        for (Map.Entry<String, String> entry : params.entrySet()) {
            if (first)
                first = false;
            else
                result.append("&");

            result.append(URLEncoder.encode(entry.getKey(), "UTF-8"));
            result.append("=");
            result.append(URLEncoder.encode(entry.getValue(), "UTF-8"));
        }

        return result.toString();
    }
}

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