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How to send and receive push notifications in android app?

I m making a carpool app and I want to send notification to rider that I am leaving and I am coming to pick you so how can I do it ?
I tried doing it but it was happening manually and It want to fetch data from the google firebase database.

How to sent Automatic messages on button press from Firebase console using FCM?

I have been developing an application for both Android & iOS . I have worked with the Firebase notification and I am aware of notification using legacy server key but my main motive is to use only Firebase console for notification and replace my godaddy server so that I can be able to send notification on button click .
Question 1: Is there any Api or SDK available from firebase in which I can send notifications to mobile devices from another server(amazon or godaddy) ?
Question 2: Is there any way or method available from firebase in which I can send notifications to another mobile device having my app installed by tapping a button from one device(basically one to many approach)?

For sending push notification from your server refer FCM Application Server. Yes, you can send notification from one device to another by using Topics or Upstream Messages (Refer here : FCM Android

How to send a push notification from one Worklight-based Hybrid app to another Worklight-based Hybrid app

I run Push Notification Sample code on Worklight server and its working.
Now i want to send notification from one device to another device so what are the required changes in the adapter?
The adapter XML:
<displayName>PushAdapter</displayName>
<description>PushAdapter</description>
<connectivity>
<connectionPolicy xsi:type="http:HTTPConnectionPolicyType">
<protocol>http</protocol>
<domain>https://android.apis.google.com</domain>
<port>8080</port>
</connectionPolicy>
<loadConstraints maxConcurrentConnectionsPerNode="2"/>
</connectivity>
Should i change domain and port and i have to upload the app first on google play so that i can able to recive or send notifications. And should i create a key for android device on GCM

Push notifications in Worklight (and I believe at large as well) are not sent from one device to another per-se; consider it this way:
You have two applications:
A managing app
A receiving app
User A is running the managing app - this application is able to send a request to the server, which tells it to send a notification to some other user(s).
User B is running the receiving app - this application is able to receive notifications.
All of this is not related at all to the Google Play store.
Yes, both apps will require a GCM senderId and Key values in order to have any Push Notification capabilities.
As for implementing all of this... there is no sample to do this, but you already have part of the solution (the sample app is able to receive notifications). What you need to do now is have the managing application be able to retrieve a list of / specific username(s), and create a procedure that will invoke a function to send the notification based on the username(s) you have retrieved.

Implementing one to one and group chat in android [duplicate]

This question already has answers here:
How to make a chat application in android? [closed]
(6 answers)
Closed 9 years ago.
I am developing an Android app in which I have to implement chat messaging. I would like one to one chat or a group chat.
But I have no idea how to start. Please help me with this stuff. Any help will be appreciated.

A simple chat mechanism will have 2 basic functionalities
Send the message to server (with info about the recipient)
Receive the message from server (designated for my user name)
First step is simple, we can create a web service which will accept the message with additional information about recipient(s). We can create it using any server side language.
Step 2, that is fetching the message from server can be done using 2 techniques, Pull the message (using polling) from server, or Push the message from server to android phone
Polling: In this, the android device will keep accessing server after a few seconds to check if there is a message available for user. This again can be implemented using a simple async task at the client side which will keep calling a web service after say 2-3 seconds. This is fine to use if we are planning to enable chatting only when user is accessing the app (no notifications like gmail or facebook), so that we can kill the polling service when not in use (otherwise it will eat up resources).
Push notifications: a better option is to use push notifications. Android provide Google cloud messaging or GCM (http://developer.android.com/google/gcm/index.html) which will help achieve push from server easily. Otherwise you can try a third party API like urbanairship or pushwoosh depending on your requirement. Push notifications will help the user to receive messages even when he is not using the app.
So in nutshell, a webservice to receive the messages and a push notification mechanism should be sufficient to implement a chat service in android.
Little bit about UrbanAirship
I used UA in one of my projects for push notifications as I needed to support both iOS and Android. If you just want to support Android GCM might also be a good option.
Coming back to UA, check this for sample code and usage: https://docs.urbanairship.com/display/DOCS/Home
The way it works is simple, when someone installs the app and is connected to internet, app registers itself to the UA service. A unique code is specified for each installed app (this is the time when you can capture the user name and unique code and store somewhere in your DB). Next UA provides an API using which you can push a message to designated recipient(s), using the unique codes which are available with UA. These messages can be received by android app and used as per the requirement. Even if the app is not running we can show a notification just like when we receive an email or a message

You can use an existing platform like Scringo. It gives you a one-on-one chat as well as group chat (both the client and the server) as well as the push notification service.

Set Push Notification in android

I have an Api. Suppose this api http://api.androidhive.info/contacts/ has this contact which I'm displaying in list view. I want to set a push notification in our application, such that when ever a new contact is added in the api then there should be a notification in our application that a new contact has been uploaded. This Notification should be displayed even if the application is not open or launched.
For example: It should function like "Time of INDIA" android app. When news updates come then it shows a Notification.
I am new in android. Please help me. hHw i will do this? Please send me example sources or post me related blog or tell me logic. How i will do this i have server access also.
Thanx

You can use GCM for this,
Google Cloud Messaging for Android (GCM) is a service that helps developers send data from servers to their Android applications on Android devices. This could be a lightweight message telling the Android application that there is new data to be fetched from the server (for instance, a movie uploaded by a friend), or it could be a message containing up to 4kb of payload data (so apps like instant messaging can consume the message directly). The GCM service handles all aspects of queueing of messages and delivery to the target Android application running on the target device
This document describes how to write an Android application and the server-side logic, using the helper libraries (client and server) provided by GCM.
Check these links,
http://developer.android.com/guide/google/gcm/gs.html
http://developer.android.com/guide/google/gcm/demo.html
http://www.basic4ppc.com/forum/basic4android-getting-started-tutorials/19226-android-push-notification-gcm-framework-tutorial.html
http://fundroiding.wordpress.com/2012/06/29/google-cloud-messaging-for-android-gcm-simple-tutorial/
for client side app you can find the code here
https://github.com/marknutter/GCM-Cordova