Android HttpClient

In this blog post, you can learn android source code on how to post data to a url by using a httpclient post method.

Please find below the very simple android source code example for dealing with httpclient post. This simple code executes a http post request with org.apache.http.client.HttpClient and can be used in the combination with Non-Blocking Web Requests.

public void postData() {

    // Create a new HttpClient and Post Header

    HttpClient httpclient = new DefaultHttpClient();

    HttpPost httppost = new HttpPost("http://www.website.com/phpscript.php");

    try {

        // Add your data

        List<NameValuePair> nameValuePairs = new ArrayList<NameValuePair>(2);

        nameValuePairs.add(new BasicNameValuePair("id", "9449"));

        nameValuePairs.add(new BasicNameValuePair("stringdata", "android"));

        httppost.setEntity(new UrlEncodedFormEntity(nameValuePairs));

        // Execute HTTP Post Request

        HttpResponse response = httpclient.execute(httppost);

        

    } catch (ClientProtocolException e) {

        // TODO Auto-generated catch block

    } catch (IOException e) {

        // TODO Auto-generated catch block

    }

} 

Creating HTTP Client and HTTP Post

// Creating a HTTP client

HttpClient httpClient = new DefaultHttpClient();

// Creating a HTTP Post

HttpPost httpPost = new HttpPost("http://www.androidsourcecodeexamples.com/index");

Create post parameters with key and value.

List<NameValuePair> nameValuePair = new ArrayList<NameValuePair>(2);

nameValuePair.add(new BasicNameValuePair("email", "xxx@gmail.com"));

nameValuePair.add(new BasicNameValuePair("password", "xxx_password"));

At last we should execute the httpPost using httpClient which is created previously.

// Making HTTP Request

try {

    HttpResponse response = httpClient.execute(httpPost);

    // writing response to log

    Log.d("Http Response:", response.toString());

} catch (ClientProtocolException e) {

    // writing exception to log

    e.printStackTrace();

         

} catch (IOException e) {

    // writing exception to log

    e.printStackTrace();

}

Please find below the full android code units to make a http Request. This example is for response to the log. For http response see your eclipse log report.

package com.udhaya.httprequests;

import java.io.IOException;

import java.io.UnsupportedEncodingException;

import java.util.ArrayList;

import java.util.List; 

import org.apache.http.HttpResponse;

import org.apache.http.NameValuePair;

import org.apache.http.client.ClientProtocolException;

import org.apache.http.client.HttpClient;

import org.apache.http.client.entity.UrlEncodedFormEntity;

import org.apache.http.client.methods.HttpPost;

import org.apache.http.impl.client.DefaultHttpClient;

import org.apache.http.message.BasicNameValuePair; 

import android.app.Activity;

import android.os.Bundle;

import android.util.Log;

public class AndroidHTTPRequestsActivity extends Activity {

    @Override

    public void onCreate(Bundle savedInstanceState) {

        super.onCreate(savedInstanceState);

        setContentView(R.layout.main);

        // Creating HTTP client

        HttpClient httpClient = new DefaultHttpClient();

        // Creating HTTP Post

        HttpPost httpPost = new HttpPost("http://www.example.com/login");

        // Building post parameters

        // key and value pair

        List<NameValuePair> nameValuePair = new ArrayList<NameValuePair>(2);

        nameValuePair.add(new BasicNameValuePair("email", "xxx@gmail.com"));

        nameValuePair.add(new BasicNameValuePair("sms",android http post"));

        // Url Encoding the POST parameters

        try {

            httpPost.setEntity(new UrlEncodedFormEntity(nameValuePair));

        } catch (UnsupportedEncodingException e) {

            // writing error to Log

            e.printStackTrace();

        }

        // Making HTTP Request

        try {

            HttpResponse response = httpClient.execute(httpPost);

            // writing response to log

            Log.d("Http Response:", response.toString());

        } catch (ClientProtocolException e) {

            // writing exception to log

            e.printStackTrace();

        } catch (IOException e) {

            // writing exception to log

            e.printStackTrace();

        }

    }

}