Question

This is an effort to develop a Android application which enable C2DM

Things I have done correctly

• Get a valid Gmail address with C2DM
• Write an Android app for getting a registrationId from C2DM
• Get that registrationId from C2DM
• Pass that registrationId to the third party server (I sent to a php
  page) (1)
• Send it correctly (I checked it with the HttpEntity class in the same
  android app and I got the content of that page)
• Getting Google authentication ID in server side (used PHP)
• Open a Gmail account in my emulator (Menu – Settings – Accounts & sync – Add acount)

Things I am confused

• How that web page (1) get notified when my Android app passed a “http” request?

• How can I display the registrationId in the web page which sent by my Android app?

Things that wont work

• Sending PushNotification to the emulator which runs my Android app. Referred this. That code is really good and first part also woks for me. But when I run the sendMessageToPhone() function it sends me 401. In my code I hard coded the values for;

• $authCode = Google authentication code I get

• $deviceRegistrationId = Code sent by the C2DM to my Android app

So please help me to clear my confusions and to correct my “wont work” activities.

Answer 1

Here is a simplest code for sending POST request to PHP:

String url = "http://your.domain.com/path/to/your/post/request/handler.php";
HttpClient client = new DefaultHttpClient();

try {
  List<NameValuePair> post = new ArrayList<NameValuePair>();
  post.add(new BasicNameValuePair("registrationId", "[YOUR ID VALUE HERE]"));

  client.setEntity(new UrlEncodedFormEntity(post));
  client.execute(new HttpPost(url));
} catch(IOException e) {
  //do something here
}

On server side(i.e. in your PHP script) you can use $_POST superglobal variable which is populated from POST data and it’s a simple associative array. Something like this:

if (!empty($_POST['registrationId'])) {
  //do something here
}