Android Tutorial Android push notification (C2DM) framework and tutorial

Erel · Jul 31, 2011

Correct link: https://www.b4x.com/android/forum/t...s-firebase-cloud-messaging-fcm.67716/#content

Erel · May 12, 2012

You can send the message to any specific registered device.

rfresh · May 12, 2012

What's the interface to send out the msg? I assume this is some kind of web page? Do I have to create it or is this at Google's website and I have to login to send the msg? Thank you...

grant1842 · May 13, 2012

Erel has coded up a batch file to pass commands to a .jar file in the Desktop Folder.
This is the example provided in this tutorial.

rfresh · May 13, 2012

That wouldn't work for me. I would be sending cmds from my website using PHP. I think for me, trying to use C2DM is beyond my B4A programming skills.

I'm going to try and find a push notification solution for tablets using the UDP protocol. Thanks for your comment.

Erel · May 13, 2012

I'm going to try and find a push notification solution for tablets using the UDP protocol.

It will be much more complicated than using this framework.

The "sending program" is a java program. You can call it from PHP or any other language you want.

rfresh · May 13, 2012

Erel said:
It will be much more complicated than using this framework.

The "sending program" is a java program. You can call it from PHP or any other language you want.

What about using TCP/IP to send the msg? Would that also be more complicated than using C2DM?

salmander · May 13, 2012

rfresh said:
What about using TCP/IP to send the msg? Would that also be more complicated than using C2DM?

here you go mate. Follow this post.

link

rfresh · May 13, 2012

@Salamander

Thanks for that link. I did register with Google 2 days ago for a C2DM account and got a confirmation email that I am in but am still waiting for my ID to use C2DM.

I guess I'll have to use C2DM for my push notifications because Erel says that's the easiest way although it looks complicated to me at this point. I'll dig in (again) and see if I can get the sample code to work. But I will need my ID first from Google right?

salmander · May 13, 2012

rfresh said:
@Salamander

Thanks for that link. I did register with Google 2 days ago for a C2DM account and got a confirmation email that I am in but am still waiting for my ID to use C2DM.

I guess I'll have to use C2DM for my push notifications because Erel says that's the easiest way although it looks complicated to me at this point. I'll dig in (again) and see if I can get the sample code to work. But I will need my ID first from Google right?

Hey mate,

I don't understand what Google ID you are talking about? You register with Google C2DM over here. You enter all the necessary details, for e.g: your package name and email address that you will be using for c2dm services. Then you wait for the google confirmation email. The email is basically an auto respond, which doesn’t contain anything specific. It just says that your C2DM should start working within 48 hours. Then, you just get on with the coding. I know, it does sound complicated at the beginning, but after a while, it all starts making sense. What helped me, is I kept on referring Erel's example code. And then you just have to make sense of the code.... I hope this post helps.

Good Luck.

Erel · May 14, 2012

What about using TCP/IP to send the msg?

You can create a service that polls your web server every x seconds. However it will consume a lot of battery (and you will need to maintain this web server).

rfresh · May 18, 2012

I moved this question into a new thread.

wl · May 18, 2012

Push through TCP connection

Hello,

I'm currently working on a push system using a C# application server-side.

You can have your Android app using a permanently open TCP connection (so you really have push instead of polling). I have the impression it does not really drain that battery fast (I have a keep-alive byte every few minutes).

I did some tests in the past. Polling every few minutes consumes a lot more battery (especially if you would be using HTTP or other existing protocol which has a lot of overhead).

Erel · May 20, 2012

The solution described in this thread doesn't use polling. I don't think that you can achieve better result than this one.

Smee · May 20, 2012

I am reading this tutorial and trying to get my heads around it all and i have a couple of questions

You are now ready to test it!
Run the B4A project, enter a name in the text field and press on the Register button. You should see a toast message saying Registration successful. Messages are also printed to the logs. It can take several seconds.
This means two things. Your device has registered with Google servers and also that the registration id was sent to the developer web service (currently configured with the service hosted here w) with the specified name.
The name will be used to reference the device. Note that each device must have a unique name.

Am I right in assuming that in a real world program you would probably use the deviceID or similar instead of allowing a user to enter a name in a text field?

Also how would you retreive info from the database on a server to a home or business computer when a user has sent info to the database?

Erel · May 20, 2012

You can use a random id as described here: C2DM Help

Also how would you retreive info from the database on a server to a home or business computer when a user has sent info to the database?

The push framework is only for sending messages to devices. It doesn't allow the device to send messages back.

Smee · May 20, 2012

Thanks for the very prompt reply Erel

rfresh · May 28, 2012

I have a question about the sample Sub code below.

What does the i in StartService(i) represent? I see the Main and the PushService modules but I don't see an 'i' service module? What is the i argument in that ServiceStart() call?

B4X:

Sub RegisterDevice (Unregister As Boolean)
   Dim i As Intent
   If Unregister Then      
      i.Initialize("com.google.android.c2dm.intent.UNREGISTER", "")
   Else
      i.Initialize("com.google.android.c2dm.intent.REGISTER", "")
      i.PutExtra("sender", Main.SenderId)
   End If
   Dim r As Reflector
   Dim i2 As Intent
   i2 = r.CreateObject("android.content.Intent")
   Dim pi As Object
   pi = r.RunStaticMethod("android.app.PendingIntent", "getBroadcast", _
      Array As Object(r.GetContext, 0, i2, 0), _
      Array As String("android.content.Context", "java.lang.int", "android.content.Intent", "java.lang.int"))
   i.PutExtra("app", pi)
   StartService(i)
End Sub

Erel · May 28, 2012

StartService can be used to send intents to other services. This intent follows the structure defined by Google C2DM service.

rfresh · May 28, 2012

In my app I have a service called 'FTP'. So that service is not being used by C2DM service?

The reason I ask is that my service module 'FTP', it's StartServiceAt() suddenly stopped working when I added the C2DM code to my app. C2DM works but I'm wondering if it's stepping on my StartServiceAt() call in my own service module?

Erel · May 29, 2012

I don't see how the two services are related.

Android Tutorial Android push notification (C2DM) framework and tutorial

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