How to do push notification from server to android mobile

Solution 1:

actually now recently mostly use for push notification FCM inside that u project .... best link for build the push notication: link

steps for perform push notification - Firebase Cloud Messaging Tutorial for Android

1. Go to firebase console and create a new project.
2. Now put your app name and select your country.
3. Now click on Add Firebase to Your Android App.
4. Now you have to enter your projects package name and click on ADD APP.
5. After clicking add app you will get google-services.json file.

On App side

1. Now come back to your android project. Go to app folder and paste google-services.json file

2. Now go to your root level build.gradle file and add the following code.

   a. Add this line classpath 'com.google.gms:google-services:3.0.0'

   b. Add this line compile 'com.google.firebase:firebase-messaging:9.0.0'

3. Now sync your project.

4. Create a class named MyFirebaseInstanceIDService.java and write the following code:

   public class MyFirebaseInstanceIDService extends FirebaseInstanceIdService {
   
       private static final String TAG = "MyFirebaseIIDService";
   
       @Override
       public void onTokenRefresh() {
   
           //Getting registration token
           String refreshedToken = FirebaseInstanceId.getInstance().getToken();
   
           //Displaying token on logcat 
           Log.d(TAG, "Refreshed token: " + refreshedToken);
   
       }
   
       private void sendRegistrationToServer(String token) {
           //You can implement this method to store the token on your server 
           //Not required for current project 
       }
   }
   

5. Now create MyFirebaseMessagingService.java and write the following code:

   import android.app.NotificationManager;
   import android.app.PendingIntent;
   import android.content.Context;
   import android.content.Intent;
   import android.media.RingtoneManager;
   import android.net.Uri;
   import android.support.v4.app.NotificationCompat;
   import android.util.Log;
   
   import com.google.firebase.messaging.FirebaseMessagingService;
   import com.google.firebase.messaging.RemoteMessage;
   
   /**
    * 
    */
   
   public class MyFirebaseMessagingService extends FirebaseMessagingService {
   
       private static final String TAG = "MyFirebaseMsgService";
   
       @Override
       public void onMessageReceived(RemoteMessage remoteMessage) {
           //Displaying data in log
           //It is optional 
           Log.d(TAG, "From: " + remoteMessage.getFrom());
           Log.d(TAG, "Notification Message Body: " + remoteMessage.getNotification().getBody());
   
           //Calling method to generate notification
           sendNotification(remoteMessage.getNotification().getBody());
       }
   
       //This method is only generating push notification
       //It is same as we did in earlier posts 
       private void sendNotification(String messageBody) {
           Intent intent = new Intent(this, MainActivity.class);
           intent.addFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP);
           PendingIntent pendingIntent = PendingIntent.getActivity(this, 0, intent,
                   PendingIntent.FLAG_ONE_SHOT);
   
           Uri defaultSoundUri= RingtoneManager.getDefaultUri(RingtoneManager.TYPE_NOTIFICATION);
           NotificationCompat.Builder notificationBuilder = new NotificationCompat.Builder(this)
                   .setSmallIcon(R.mipmap.ic_launcher)
                   .setContentTitle("Firebase Push Notification")
                   .setContentText(messageBody)
                   .setAutoCancel(true)
                   .setSound(defaultSoundUri)
                   .setContentIntent(pendingIntent);
   
           NotificationManager notificationManager =
                   (NotificationManager) getSystemService(Context.NOTIFICATION_SERVICE);
   
           notificationManager.notify(0, notificationBuilder.build());
       }
   }
   

6. Now we have to define the above services in our AndroidManifest.xml file. So go to manifest and modify as follows.

   <!-- Adding Internet Permission -->
   
   <uses-permission android:name="android.permission.INTERNET"/>
   <application
       android:allowBackup="true"
       android:icon="@mipmap/ic_launcher"
       android:label="@string/app_name"
       android:supportsRtl="true"
       android:theme="@style/AppTheme">
       <activity android:name=".MainActivity">
           <intent-filter>
               <action android:name="android.intent.action.MAIN" />
   
               <category android:name="android.intent.category.LAUNCHER" />
           </intent-filter>
       </activity>
   
       <!-- 
           Defining Services
       -->
       <service
           android:name=".MyFirebaseMessagingService">
           <intent-filter>
               <action android:name="com.google.firebase.MESSAGING_EVENT"/>
           </intent-filter>
       </service>
   
       <service
           android:name=".MyFirebaseInstanceIDService">
           <intent-filter>
               <action android:name="com.google.firebase.INSTANCE_ID_EVENT"/>
           </intent-filter>
       </service>
   </application>
   

finally

Go to firebase console and select the app you created. From the left menu select notification. Click on new message. Enter message, select single device and paste the token you copied and click on send. The same as I did on the video, and check your device

Solution 2:

here is a good explanation about this:
http://quickblox.com/developers/SimpleSample-messages_users-android

The overall steps are:

1. Create a google API project
2. Enable push notifications for the project and get a API key
3. Get a registration ID through android app (each device has a registration ID for a specific application)
4. Create a server application to send your push messages as push notifications through google servers by GSM
5. Create a notification when you get the push notification on the application side

It's not something i can write all here by details. Use Google for every step.

Solution 3:

The first thing - Google Push Notifications are called GCM (Google Cloud Messaging). Wrong name usage might lead you to wrong information or tutorial. The other thing, you should rely on Developer. In this case start from Google Developers website, where you will find most of basic info and code examples to start with. https://developers.google.com/cloud-messaging/.

Update

GCM is deprecated, you should use Firebase Cloud Messaging (FCM)

Solution 4:

You can check out Firebase... Check out this link

https://firebase.google.com/docs/cloud-messaging/

This link is sufficient to learn about Push Notifications

And as for sending notification when data in database changes, make your API send a request to FCM server so that it delivers necessary data to clients.