Anyone doing C2DM on Android

I need to implement c2dm in my app. Is there anyone who is also doing this? Please help..some tutorials will be very he开发者_如何学Clpful OR if you have completed your c2dm implementation then a tutorial is more than appreciated.

Please help.

I went ahead and downloaded the Chrome2Phone source code for android and understood how it works through that example, I had the most trouble implementing the server side of the App.

Download it from: http://code.google.com/p/chrometophone/source/checkout

or svn it:

svn checkout http://chrometophone.googlecode.com/svn/trunk/ chrometophone-read-only

Basic things you should understand.

In the C2DMBaseReciever class you have:

@Override
    public final void onHandleIntent(Intent intent) {
        try {
            Context context = getApplicationContext();
            if (intent.getAction().equals(REGISTRATION_CALLBACK_INTENT)) {
                handleRegistration(context, intent);
            } else if (intent.getAction().equals(C2DM_INTENT)) {
                onMessage(context, intent);
            } else if (intent.getAction().equals(C2DM_RETRY)) {
                C2DMessaging.register(context, senderId);
            }
        } finally {
            //  Release the power lock, so phone can get back to sleep.
            // The lock is reference counted by default, so multiple 
            // messages are ok.

            // If the onMessage() needs to spawn a thread or do something else,
            // it should use it's own lock.
            mWakeLock.release();
        }
    }

This method recieves the intents from the C2DM service and handles them.

In the handleRegistration method you will see some code that looks like:

} else {
            try {
                onRegistrered(context, registrationId);
                C2DMessaging.setRegistrationId(context, registrationId);
                //Add some code here to send your server the registration ID for this phone.
            } catch (IOException ex) {
                Log.e(TAG, "Registration error " + ex.getMessage());
            }
        }

You then have to use the google oAuth login service to register your server to the service, once that is done you can send a message. When I was testing I was using curl to send http post requests to the server.

To register from the server:

curl https://www.google.com/accounts/ClientLogin -d Email=theEmailYouWhitelisted -d Passwd=pass****word -d accountType=HOSTED_OR_GOOGLE -d source=Google-cURL-Example -d service=ac2dm

You will get a message with an auth id. You then use that to send the messages. To send a message use:

curl --header "Authorization: GoogleLogin auth=**authFromRegistrationAbove**" "https://android.apis.google.com/c2dm/send" -d registration_id=**phoneRegistrationId(reciever)** -d "data.message=StringToPass" -d collapse_key=something -k

Download curl from: CURL

Hope this helps.

a tutorial about c2dm client/server registration and sending/receiving of messages.

http://android.arnodenhond.com/tutorials/cloud-to-device-messaging

• intent to request a registration id
• receiver to receive registration id
• url to call for registering the server
• url to call for sending a message
• broadcast receiver to receive the message