I have referred Vogella Tutorial for Android C2DM and implemented client and server as follows.
I've problem with 3 URL's used in application, 1 in client and 2 in server.
In place of 1st URL, there should be server address which I have created. But I don't get what exactly to put there.
Rest of the 2 URL's(sub-URL of google) are not accessible appropriately.
I've highlighted those 3 URL usage by enclosing them with
//==========================================================================
and numbering them.
Note that I'm able to register at the client side but not able to receive any message.
And at server side, I get the authentication but when I try to send the message it gives UnknownHostException.
I know I'm quite unclear in this question but I'm absolute beginner when it comes to Android C2DM development.
Any help appreciated.
Suggest changes if any.
Client code snippet (C2DMRegistrationReceiver.java)
public void sendRegistrationIdToServer(String deviceId,
String registrationId) {
Log.d("C2DM", "Sending registration ID to my application server");
HttpClient client = new DefaultHttpClient();
HttpPost post;
// 1.) ========================================================================
post = new HttpPost("http://vogellac2dm.appspot.com/register");
//=============================================================================
List<NameValuePair> nameValuePairs = new ArrayList<NameValuePair>(1);
// Get the deviceID
nameValuePairs.add(new BasicNameValuePair("deviceid", deviceId));
nameValuePairs.add(new BasicNameValuePair("registrationid",
registrationId));
post.setEntity(new UrlEncodedFormEntity(nameValuePairs));
HttpResponse response = client.execute(post);
BufferedReader rd = new BufferedReader(new InputStreamReader(
response.getEntity().getContent()));
}
Server code snippet
public class ServerSimulator extends Activity {
private SharedPreferences prefManager;
private final static String AUTH = "authentication";
private static final String UPDATE_CLIENT_AUTH = "Update-Client-Auth";
public static final String PARAM_REGISTRATION_ID = "registration_id";
public static final String PARAM_DELAY_WHILE_IDLE = "delay_while_idle";
public static final String PARAM_COLLAPSE_KEY = "collapse_key";
private static final String UTF8 = "UTF-8";
// Registration is currently hardcoded
private final static String YOUR_REGISTRATION_STRING = "APA91bFQut1tqA-nIL1ZaV0emnp4Rb0smwCkrMHcoYRXeYVtIebJgrzOHQj0h76qKRzd3bC_JO37uJ0NgTcFO87HS9V7YC-yOP774pm0toppTHFO7Zc_PAw";
private SharedPreferences prefs;
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
prefManager = PreferenceManager.getDefaultSharedPreferences(this);
}
public void getAuthentification(View view) {
SharedPreferences prefs = PreferenceManager
.getDefaultSharedPreferences(this);
HttpClient client = new DefaultHttpClient();
// 2.) ==========================================================================
HttpPost post = new HttpPost(
"https://www.google.com/accounts/ClientLogin");
//==============================================================================
try {
List<NameValuePair> nameValuePairs = new ArrayList<NameValuePair>(1);
nameValuePairs.add(new BasicNameValuePair("Email", prefs.getString(
"user", "myUserName@gmail.com")));
nameValuePairs.add(new BasicNameValuePair("Passwd", prefs
.getString("password", "myPassword")));
nameValuePairs.add(new BasicNameValuePair("accountType", "GOOGLE"));
nameValuePairs.add(new BasicNameValuePair("source",
"Google-cURL-Example"));
nameValuePairs.add(new BasicNameValuePair("service", "ac2dm"));
post.setEntity(new UrlEncodedFormEntity(nameValuePairs));
HttpResponse response = client.execute(post);
BufferedReader rd = new BufferedReader(new InputStreamReader(
response.getEntity().getContent()));
String line = "";
while ((line = rd.readLine()) != null) {
Log.e("HttpResponse", line);
if (line.startsWith("Auth=")) {
Editor edit = prefManager.edit();
edit.putString(AUTH, line.substring(5));
edit.commit();
String s = prefManager.getString(AUTH, "n/a");
Toast.makeText(this, s, Toast.LENGTH_LONG).show();
}
}
} catch (IOException e) {
e.printStackTrace();
}
}
public void sendMessage(View view) {
try {
Log.e("sendMessage", "Started");
String auth_key = prefManager.getString(AUTH, "n/a");
// Send a sync message to this Android device.
StringBuilder postDataBuilder = new StringBuilder();
postDataBuilder.append(PARAM_REGISTRATION_ID).append("=")
.append(YOUR_REGISTRATION_STRING);
postDataBuilder.append("&").append(PARAM_COLLAPSE_KEY).append("=")
.append("0");
postDataBuilder.append("&").append("data.payload").append("=")
.append(URLEncoder.encode("Lars war hier", UTF8));
byte[] postData = postDataBuilder.toString().getBytes(UTF8);
// Hit the dm URL.
// 3.) ==========================================================================
URL url = new URL("https://android.clients.google.com/c2dm/send");
//===============================================================================
HttpURLConnection conn = (HttpURLConnection) url.openConnection();
conn.setDoOutput(true);
conn.setUseCaches(false);
conn.setRequestMethod("POST");
conn.setRequestProperty("Content-Type",
"application/x-www-form-urlencoded;charset=UTF-8");
conn.setRequestProperty("Content-Length",
Integer.toString(postData.length));
conn.setRequestProperty("Authorization", "GoogleLogin auth="
+ auth_key);
OutputStream out = conn.getOutputStream();
out.write(postData);
out.close();
int responseCode = conn.getResponseCode();
Log.e("Response Code=", String.valueOf(responseCode));
// Validate the response code
// Check for updated token header
String updatedAuthToken = conn.getHeaderField(UPDATE_CLIENT_AUTH);
if (updatedAuthToken != null && !auth_key.equals(updatedAuthToken)) {
Log.i("C2DM",
"Got updated auth token from datamessaging servers: "
+ updatedAuthToken);
Editor edit = prefManager.edit();
edit.putString(AUTH, updatedAuthToken);
}
String responseLine = new BufferedReader(new InputStreamReader(
conn.getInputStream())).readLine();
String[] responseParts = responseLine.split("=", 2);
if (responseParts.length != 2) {
Log.e("C2DM", "Invalid message from google: " + responseCode
+ " " + responseLine);
throw new IOException("Invalid response from Google "
+ responseCode + " " + responseLine);
}
if (responseParts[0].equals("id")) {
Log.i("Tag", "Successfully sent data message to device: "
+ responseLine);
}
if (responseParts[0].equals("Error")) {
String err = responseParts[1];
Log.w("C2DM",
"Got error response from Google datamessaging endpoint: "
+ err);
// No retry.
throw new IOException(err);
}
} catch (Exception e) {
throw new RuntimeException(e);
}
}
}
