public class GoogleAuthenticationWithLoginDetails {
private final String googleLoginUrl = "https://www.google.com/accounts/ClientLogin";
private final String service = "ah";
private Cookie authCookie = null;
//Constructor creates the cookie
public GoogleAuthenticationWithLoginDetails() {
}
public boolean authenticate(String username, String password) {
boolean returnValue = false;
String authToken = null;
if (authCookie == null)
{
Log.d("authenticate", "NULL");
try {
authToken = GetToken(username, password);
//authCookie = getAuthCookie(authToken);
} catch (ClientProtocolException e) {
// TODO Auto-generated catch block
e.printStackTrace();
Log.d("authenticate Exception", e.getMessage());
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
Log.d("authenticate Exception", e.getMessage());
}
}
if (authToken.trim().length() > 0) {
Log.d("authToken!=null", "NOT NULL");
Log.d("TOKEN=", authToken);
returnValue = true;
} else {
Log.d("authToken==null", "NULL");
returnValue = false;
}
return returnValue;
}
private String GetToken(String googleAccount, String googlePassword) throws MalformedURLException, ProtocolException, UnsupportedEncodingException, IOException
{
Log.d("GetToken", "Reached");
String token = null;
HttpURLConnection h = GetConnection(googleAccount, googlePassword);
token = extractAuthTokenFromResponse(h);
Log.d("GetToken", token);
return token;
}
private HttpURLConnection GetConnection(String username, String password)
throws MalformedURLException, IOException, ProtocolException,
UnsupportedEncodingException {
HttpURLConnection urlConnection;
URL url = new URL(googleLoginUrl);
urlConnection = (HttpURLConnection) url.openConnection();
urlConnection.setRequestMethod("POST");
urlConnection.setDoInput(true);
urlConnection.setDoOutput(true);
urlConnection.setUseCaches(false);
urlConnection.setRequestProperty("Content-Type",
"application/x-www-form-urlencoded");
StringBuilder content = new StringBuilder();
content.append("Email=").append(username);
content.append("&Passwd=").append(password);
content.append("&service=").append(service);
OutputStream outputStream = urlConnection.getOutputStream();
outputStream.write(content.toString().getBytes("UTF-8"));
outputStream.close();
return urlConnection;
}
private String extractAuthTokenFromResponse(HttpURLConnection urlConnection)
throws IOException {
int responseCode = urlConnection.getResponseCode();
System.out.println(responseCode);
StringBuffer resp = new StringBuffer();
if (responseCode == HttpURLConnection.HTTP_OK) {
InputStream inputStream = urlConnection.getInputStream();
BufferedReader rd = new BufferedReader(new InputStreamReader(inputStream));
String line;
while ((line = rd.readLine()) != null) {
if (line.startsWith("Auth="))
{
resp.append(line.substring(5));
}
}
rd.close();
}
return resp.toString();
}
}
Google Authentication for Android Applications
If you want to authenticate a user with google with out showing the Google login page