how can I deploy android application to receive notifications when the online database is changed?
Using a database phpmysql, how can I communicate this with my android app? Thank you all for the safe response
Try to have a look at Google Cloud Messaging, your server can push a notification to a specific device or broadcast messages to all your devices that something has happened on your server.
Related
I am developing an application that saves some data in the Firebase Database. As soon as the data is saved, I want it to be given as a notification to all the users connected to the application through code.
I couldn't understand the procedure to do so. Can anyone explain me how one can send push notifications via code in the chain as Android phone -> Firebase Database -> Notification to Android Phone with the data.
it isn't Possible to solve your Problem with Firebase only. You have to create a MySQL Server and work with PHP. Maybe this Video from Filip Vujovic could help you.
https://www.youtube.com/watch?v=LiKCEa5_Cs8
You can use GCM,it's simple.The GCM service handles all aspects of queueing of messages and delivery to client applications running on target devices, and it is completely free.
I just switched my app over to firebase 2.0 from parse. Basically I have an android app (main app) built for the general public to use. Then I also built a second app (manager app) that only I and a few others have access to which is used to update the content of the main app. Now I am adding in notifications which work fine when I send them from the firebase console, however, is it possible to send them from the manager app to the main app? If not, what would I need to do in order to send them from somewhere other than the console (I don't want anyone else to have access to the console but would like them to be able to send notifications.) Thanks!
Seems like you are looking for device to device messaging. This is not currently supported by FCM, so you will need some type of server.
The server could implement XMPP in which case it can be a relay, upstream messages from admin client will be converted to downstream messages to non-admin clients.
The server could watch the Firebase Relatime Database and then the admin client could write something to the database and the server watching the database could then take action and send notifications to non-admin clients.
i am trying to develop an application to sync contact's from device to server
i am aware of GOOGLE CLOUD MESSAGING, but what i exactly needed is to have my own server for contact's and if i manually added a contact in my server it should be update on device without any interaction by user on device.
The same process in ios and other platformed device's also.
similar to this : sync Contacts between iPhone(also Android) and server
The core of my question is : how to update any changes made in server on device side automatically thank you
Try looking into the SyncAdapter and trigger the updates via a push notification using GCM. The general structure would be:
A change is made in the contacts on the server side
The server sends push notifications to the devices that need to update the information
The SyncAdapter requests the updated data from your server
For IOS you can use APNS just like GCM for Android.
I read about Google Cloud Messaging at http://developer.android.com/google/gcm/gcm.html.
It supports Third Party Application server to Android application push notification.
I am wondering whether it is possible to implement the same thing push/receive notification from an Android app on one mobile to the same Android app on another mobile using Google Cloud Messaging.
If not, is there any other free service available similar to Google Cloud Messaging?
An Android device can send a GCM message to another Android device. All it needs is the API Key (of the Google API Project ID that the app uses to register to GCM) an the Registration ID of the other device. Using these parameters it can send a GCM message to another device via an HTTP request.
Usually applications that use GCM require a 3rd party server in order to store the Registration IDs of all registered devices. If your app has a different way to let devices share their Registration IDs with each other without requiring a server, you don't need the server.
As far as I'm aware, there has to be a server in the middle to send the push notifications (Android -> Personal Server -> GCM Server -> Android)
So the Android device sending the notification would send some data to a script on the server (using a HTTP GET/POST), and that script would then send the push notifications to all the devices that you wanted it to
Following the example Code from google (GCM Client Example), you can build an app to get a registration ID for your device, but sending messages without a server wouldn't work in my opinion. I didn't tried by now, but what about using the Google Backend Starter, or (what I tried) using a Backend as a Service Provider like apiOmat if you can't afford or don't want to set up a server.
I was just looking at the new Google Cloud Messaging (GCM) and I was wondering if it is possible to use GCM for Instant Messaging on your Android application?
I saw you can send data, like a message, from a server, but is it also possible to send from one device to another one?
And how would this work?
Some example code would be really helpful..
Tnx!
The official docs on Google Cloud Messaging for Android does mention that GCM can be used to develop an instant messaging app.
...or it could be a message containing up to 4kb of payload data (so
apps like instant messaging can consume the message directly).
So we went ahead and created an instant messaging app using GCM. The server-side is powered by Google App Engine. You can read the complete tutorial here. Create an Instant Messaging app using Google Cloud Messaging (GCM)
So it is possible to use GCM for Instant Messaging on Android, to answer your question. However, reliability of GCM compared to XMPP for IM is another topic.
Just my two cents:
I think you should not use GCM for delivering IM. You should have a dedicated server where your Android IM apps will connect to, using a persistent socket connection. Your server will know who is online or not and therefore can present an 'online list' to all the apps.
GCM can come into play, while users are offline or not running your app. A GCM message can be sent to them to indicate 'XXXX wants to chat'. They can then launch your app and automatically connects to a chat session.
Google has said that the delivery of GCM messages are not guaranteed. This reason alone is not a good idea to rely on them for Instant Messaging.
Try pub nub - it is pretty easy to implement - send Im from one mobile to another - simply fire up the web page (see link) in the browser , and chat between pc, mobile - and works - with 'no server'. Code is for javascript but they also have java. Chat app using jquerymobile web app framework
You might want to check out how a server sends a message to the GCM Service. It is possible to use php on Server side so it should be possible to adapt that to a POST request directly out of your application. However, to communicate you need the registered ids of the devices you want to send data to. Means you will need something to store and get them. Best solution would be your own (web) server which stores all ids and handles the Message sending.