/** Called when the activity is first created. */
@Override
public void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    LoginLayout.context = getApplicationContext();
    setContentView(R.layout.activity_login_layou);
    un = (EditText) findViewById(R.id.et_un);
    pw = (EditText) findViewById(R.id.et_pw);
    ok = (Button) findViewById(R.id.btn_login);
    finalResult = (TextView) findViewById(R.id.tv_error);
    ok.setOnClickListener(new View.OnClickListener() {

        @Override
        public void onClick(View v) {
            AsyncTaskRunner runner=new AsyncTaskRunner();
            String userName=un.getText().toString();
            String password=pw.getText().toString();
            asyncTask=runner.execute(userName,password);
            try {
                String asyncResultText=asyncTask.get();
                response = asyncResultText.trim();
            } catch (InterruptedException e1) {
                response = e1.getMessage();
            } catch (ExecutionException e1) {
                response = e1.getMessage();
            } catch (Exception e1) {
                response = e1.getMessage();
            }
            finalResult.setText(response);
        }
    });
}

public static Context getAppContext() {
    return LoginLayout.context;
}

private String resp;
@Override
protected String doInBackground(String... params) {
    int count = params.length;
    if(count==2){
        ArrayList<NameValuePair> postParameters = new ArrayList<NameValuePair>();
        postParameters.add(new BasicNameValuePair("username",params[0]));
        postParameters.add(new BasicNameValuePair("password",params[1]));
        String response = null;
        try {
            response = SimpleHttpClient.executeHttpPost("url of the page", postParameters);
            String res = response.toString();
            resp = res.replaceAll("\s+", "");
        } catch (Exception e) {
            e.printStackTrace();
            resp = e.getMessage();
        }
    }else{
        resp="Invalid number of arguments-"+count;
    }
    return resp;
}

public static final int HTTP_TIMEOUT = 30 * 1000; // milliseconds

/** Single instance of our HttpClient */
private static HttpClient mHttpClient;

/**
 * Get our single instance of our HttpClient object.
 *
 * @return an HttpClient object with connection parameters set
 */
private static HttpClient getHttpClient() {
    if (mHttpClient == null) {
        //sets up parameters
        HttpParams params = new BasicHttpParams();
        HttpProtocolParams.setVersion(params, HttpVersion.HTTP_1_1);
        HttpProtocolParams.setContentCharset(params, "utf-8");
        params.setBooleanParameter("http.protocol.expect-continue", false);
        //registers schemes for both http and https
        SchemeRegistry registry = new SchemeRegistry();
        registry.register(new Scheme("http", PlainSocketFactory.getSocketFactory(), 80));
        registry.register(new Scheme("https", newSslSocketFactory(), 443));
        ClientConnectionManager manager = new ThreadSafeClientConnManager(params, registry);
        mHttpClient = new DefaultHttpClient(manager, params);
    }
    return mHttpClient;
}

private static SSLSocketFactory newSslSocketFactory() {
    try {
        KeyStore trusted = KeyStore.getInstance("BKS");
        InputStream in = LoginLayout.getAppContext().getResources().openRawResource(R.raw.keystore);
        try {
            // Keystore password comes in place of 222222
            trusted.load(in, "222222".toCharArray());
        } finally {
            in.close();
        }
      /*
       * If you use STRICT_HOSTNAME_VERIFIER, the the host name in the URL should match with
       * the host name in the server certificate. In this application it is 192.168.1.3
       *
       * If you do not want to check the host name and simply want to connect to the URL, then use ALLOW_ALL_HOSTNAME_VERIFIER
       *
       */
        //HostnameVerifier hostnameVerifier = org.apache.http.conn.ssl.SSLSocketFactory.ALLOW_ALL_HOSTNAME_VERIFIER;
        HostnameVerifier hostnameVerifier = org.apache.http.conn.ssl.SSLSocketFactory.STRICT_HOSTNAME_VERIFIER;
        SSLSocketFactory socketFactory = new SSLSocketFactory(trusted);
        socketFactory.setHostnameVerifier((X509HostnameVerifier) hostnameVerifier);
        return socketFactory;
    } catch (Exception e) {
        throw new AssertionError(e);
    }
}

/**
 * Performs an HTTP Post request to the specified url with the
 * specified parameters.
 *
 * @param url The web address to post the request to
 * @param postParameters The parameters to send via the request
 * @return The result of the request
 * @throws Exception
 */
public static String executeHttpPost(String url, ArrayList<NameValuePair> postParameters) throws Exception {
    BufferedReader in = null;
    try {
        HttpClient client = getHttpClient();
        HttpPost request = new HttpPost(url);
        UrlEncodedFormEntity formEntity = new UrlEncodedFormEntity(postParameters);
        request.setEntity(formEntity);
        HttpResponse response = client.execute(request);
        in = new BufferedReader(new InputStreamReader(response.getEntity().getContent()));

        StringBuffer sb = new StringBuffer("");
        String line = "";
        String NL = System.getProperty("line.separator");
        while ((line = in.readLine()) != null) {
            sb.append(line + NL);
        }
        in.close();

        String result = sb.toString();
        return result;
    }
    finally {
        if (in != null) {
            try {
                in.close();
            } catch (IOException e) {
                e.printStackTrace();
            }
        }
    }
}

/**
 * Performs an HTTP GET request to the specified url.
 *
 * @param url The web address to post the request to
 * @return The result of the request
 * @throws Exception
 */
public static String executeHttpGet(String url) throws Exception {
    BufferedReader in = null;
    try {
        HttpClient client = getHttpClient();
        HttpGet request = new HttpGet();
        request.setURI(new URI(url));
        HttpResponse response = client.execute(request);
        in = new BufferedReader(new InputStreamReader(response.getEntity().getContent()));

        StringBuffer sb = new StringBuffer("");
        String line = "";
        String NL = System.getProperty("line.separator");
        while ((line = in.readLine()) != null) {
            sb.append(line + NL);
        }
        in.close();

        String result = sb.toString();
        return result;
    }
    finally {
        if (in != null) {
            try {
                in.close();
            } catch (IOException e) {
                e.printStackTrace();
            }
        }
    }
}