Q:

Android - HTTP POST and GET login and view html

I am trying to log in to facebook given a users credentials and receive the html of the webpage using HTTP POST and GET. Here is my code:
    HttpClient httpClient = new DefaultHttpClient();
    HttpPost httpPost = new HttpPost("https://www.facebook.com/");
    HttpResponse response = null;

    List<NameValuePair> nameValuePair = new ArrayList<NameValuePair>(2);
    nameValuePair.add(new BasicNameValuePair("email", USEREMAIL));
    nameValuePair.add(new BasicNameValuePair("pass", USERPASSWORD));
    nameValuePair.add(new BasicNameValuePair("submit", "Log In"));
    try {
        httpPost.setEntity(new UrlEncodedFormEntity(nameValuePair));

    } catch (UnsupportedEncodingException e)
    {
        System.out.println("HERE 3");
        e.printStackTrace();
    }
    try {
         response = httpClient.execute(httpPost);
        System.out.println(response.getStatusLine().getStatusCode() < 400);

        // write response to log
        Log.d("Http Post Response:", response.toString());
    } catch (ClientProtocolException e) {
        // Log exception
        e.printStackTrace();
    } catch (IOException e) {
        // Log exception
        System.out.println("HERE 2");

        e.printStackTrace();
    }
    //ATTEMPT 3
    String htmlsource = "";
    InputStream in = null;
    try {
        in = response.getEntity().getContent();
    } catch (IOException e) {
        e.printStackTrace();
    }
    BufferedReader myreader = new BufferedReader(new InputStreamReader(in));
    StringBuilder string = new StringBuilder();
    String line = null;
    try {
        while ((line = myreader.readLine()) != null) // Read line by line
          string.append(line + "\n");

    } catch (IOException e) {
        e.printStackTrace();
    }
    try {
        in.close();
    } catch (IOException e) {
        e.printStackTrace();
    }
    htmlsource = string.toString();
    System.out.println(htmlsource);

It is supposed to print out all the html of the page AFTER a login, but instead it simply prints out the HTML of the login page. Does anyone know how to fix this? Thanks. 
EDIT: Here is the HTML output

<!DOCTYPE html>
<html lang="en" id="facebook" class="no_js">
   <head>
      <meta charset="utf-8" />
      <script>function envFlush(a){function b(c){for(var d in a)c[d]=a[d];}if(window.requireLazy){window.requireLazy(['Env'],b);}else{window.Env=window.Env||{};b(window.Env);}}envFlush({"ajaxpipe_token":"AXg9mPow7WZQS-1I","lhsh":"DAQEgAACr"});</script>
      <script>CavalryLogger=false;</script>
      <noscript>
         <meta http-equiv="refresh" content="0; URL=/login.php?next=https%3A%2F%2Fwww.facebook.com%2Fgroups%2F123435454667253%2F&amp;_fb_noscript=1" />
      </noscript>
      <meta name="referrer" content="default" id="meta_referrer" />
      <title id="pageTitle">Log into Facebook | Facebook</title>
      <meta property="og:site_name" content="Facebook" />
      <meta property="og:url" content="https://www.facebook.com/login.php?next=https%3A%2F%2Fwww.facebook.com%2Fgroups%2F123435454667253%2F" />
      <meta property="og:locale" content="en_US" />
      <meta property="og:locale:alternate" content="www" />
      <meta property="og:locale:alternate" content="es_LA" />
      <meta property="og:locale:alternate" content="es_ES" />
      <meta property="og:locale:alternate" content="fr_FR" />
      <meta property="og:locale:alternate" content="it_IT" />
      <meta property="og:locale:alternate" content="id_ID" />
      <meta property="og:locale:alternate" content="th_TH" />
      <meta property="og:locale:alternate" content="vi_VN" />
      <meta property="og:locale:alternate" content="ko_KR" />
      <link rel="search" type="application/opensearchdescription+xml" href="/osd.xml" title="Facebook" />
      <link rel="canonical" href="https://www.facebook.com/login/" />
      <link rel="alternate" media="only screen and (max-width: 640px)" href="https://m.facebook.com/login/" />
      <link rel="alternate" media="handheld" href="https://m.facebook.com/login/" />
      <link rel="alternate" hreflang="x-default" href="https://www.facebook.com/login/" />
      <link rel="alternate" hreflang="en" href="https://www.facebook.com/login/" />
      <link rel="alternate" hreflang="ar" href="https://ar-ar.facebook.com/login/" />
      <link rel="alternate" hreflang="bg" href="https://bg-bg.facebook.com/login/" />
      <link rel="alternate" hreflang="bs" href="https://bs-ba.facebook.com/login/" />
      <link rel="alternate" hreflang="ca" href="https://ca-es.facebook.com/login/" />
      <link rel="alternate" hreflang="da" href="https://da-dk.facebook.com/login/" />
      <link rel="alternate" hreflang="el" href="https://el-gr.facebook.com/login/" />
      <link rel="alternate" hreflang="es" href="https://es-la.facebook.com/login/" />
      <link rel="alternate" hreflang="es-es" href="https://es-es.facebook.com/login/" />
      <link rel="alternate" hreflang="fa" href="https://fa-ir.facebook.com/login/" />
      <link rel="alternate" hreflang="fi" href="https://fi-fi.facebook.com/login/" />
      <link rel="alternate" hreflang="fr" href="https://fr-fr.facebook.com/login/" />
      <link rel="alternate" hreflang="fr-ca" href="https://fr-ca.facebook.com/login/" />
      <link rel="alternate" hreflang="hi" href="https://hi-in.facebook.com/login/" />
      <link rel="alternate" hreflang="hr" href="https://hr-hr.facebook.com/login/" />
      <link rel="alternate" hreflang="id" href="https://id-id.facebook.com/login/" />
      <link rel="alternate" hreflang="it" href="https://it-it.facebook.com/login/" />
      <link rel="alternate" hreflang="ko" href="https://ko-kr.facebook.com/login/" />
      <link rel="alternate" hreflang="mk" href="https://mk-mk.facebook.com/login/" />
      <link rel="alternate" hreflang="ms" href="https://ms-my.facebook.com/login/" />
      <link rel="alternate" hreflang="pl" href="https://pl-pl.facebook.com/login/" />
      <link rel="alternate" hreflang="pt" href="https://pt-br.facebook.com/login/" />
      <link rel="alternate" hreflang="pt-pt" href="https://pt-pt.facebook.com/login/" />
      <link rel="alternate" hreflang="ro" href="https://ro-ro.facebook.com/login/" />
      <link rel="alternate" hreflang="sl" href="https://sl-si.facebook.com/login/" />
      <link rel="alternate" hreflang="sr" href="https://sr-rs.facebook.com/login/" />
      <link rel="alternate" hreflang="th" href="https://th-th.facebook.com/login/" />
      <link rel="alternate" hreflang="vi" href="https://vi-vn.facebook.com/login/" />
      <meta name="description" content="Log into Facebook to start sharing and connecting with your f
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A:

I think that you should use the Facebook SDK to support logins in your app, I don't know if login just with an HTTP POST is available.
Here is the Getting started guide:

https://developers.facebook.com/docs/android/getting-started

And the Login example

https://developers.facebook.com/docs/facebook-login/android

