Hello friends, I came back with a new post.
In this post, we are going to learn how to handle notifications with an image from the firebase console.
Here are a few steps I think we can skip.
- Login/Register to the firebase.
- Setup your project in the android studio.
- Create a project on the firebase console.
- Add firebase to your project.
Add dependency (in “app/build.gradle”)
implementation 'com.google.firebase:firebase-messaging:20.0.0'
Create a class that extends FirebaseMessangingService in my case it is “MyFirebaseMessangingService”
Your class look like this initially
class MyFirebaseMessangingService : FirebaseMessagingService(){
override fun onNewToken(p0: String) {
super.onNewToken(p0)
}
override fun onMessageReceived(remoteMessage: RemoteMessage) {
super.onMessageReceived(remoteMessage)
}
}
“ onNewToken “: Function will be called when firebase creates/update a unique token for a particular user.
This can be updated periodically, reinstall the app, clear data, etc.
“ onMessageReceived “: This is a special function that is called when a message is received from the firebase console or by your app’s backend, in this function you have to create and show the notification.
Note : This function only triggers when your app is in the foreground state.
Q. What happens when the app is in the background & how to show notification in that condition?
Ans: Firebase will handle itself and show the notification & on click on that notification it will open the very first activity of your projects like Splash or Dashboard.
Add Firebase messaging service to Manifest.xml inside the application tag.
<service
android:name=".java.MyFirebaseMessagingService"
android:exported="false">
<intent-filter>
<action android:name="com.google.firebase.MESSAGING_EVENT" />
</intent-filter>
</service>
Show Notification (first download image to bitmap and then show notification)
private fun downloadImage(notification: RemoteMessage.Notification?) {
Observable.fromCallable(object : Callable<Bitmap?> {
override fun call(): Bitmap? {
val future = Glide.with(applicationContext).asBitmap()
.load(notification?.imageUrl).submit()
return future.get()
}
}).subscribeOn(Schedulers.io())
.observeOn(AndroidSchedulers.mainThread())
.subscribe(object : Observer<Bitmap?> {
override fun onComplete() {
}
override fun onSubscribe(d: Disposable) {
}
override fun onNext(t: Bitmap) {
showNotification(notification,t)
}
override fun onError(e: Throwable) {
showNotification(notification,null)
}
})
}
Note: I used RxJava here for threading, you can use any method you want.
Show the notification
private fun showNotification(notification: RemoteMessage.Notification?, image: Bitmap?) {
val notificationManager = applicationContext.getSystemService(Context.NOTIFICATION_SERVICE) as NotificationManager
val channelId = getString(R.string.notification_channel_id)
val channelName = getString(R.string.notification_channel_name)
val importance = NotificationManager.IMPORTANCE_LOW
if (android.os.Build.VERSION.SDK_INT >= android.os.Build.VERSION_CODES.O) {
val mChannel = NotificationChannel(channelId, channelName, importance)
notificationManager.createNotificationChannel(mChannel)
}
val intent = Intent(applicationContext, MainActivity::class.java)
val pendingIntent = PendingIntent.getService(applicationContext, 1, intent, 0)
var builder: Notification.Builder? = null
if (android.os.Build.VERSION.SDK_INT >= android.os.Build.VERSION_CODES.O) {
builder = Notification.Builder(applicationContext, channelId)
} else {
builder = Notification.Builder(applicationContext)
}
if (android.os.Build.VERSION.SDK_INT >= Build.VERSION_CODES.LOLLIPOP) {
builder.setSmallIcon(R.mipmap.ic_launcher)
} else {
builder.setSmallIcon(R.mipmap.ic_launcher)
}
val title = if (notification?.title.toString().isNullOrEmpty()) {
getString(R.string.app_name)
}else{
notification?.title
}
val content = if (notification?.body.isNullOrEmpty()) {
getString(R.string.app_name)
}else{
notification?.body
}
builder.setContentTitle(title)
.setContentText(content)
.setDeleteIntent(pendingIntent)
if (image != null) {
builder.setStyle(Notification.BigPictureStyle().bigPicture(image))
}
if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.LOLLIPOP) {
builder.setVisibility(Notification.VISIBILITY_PUBLIC)
}
notificationManager.notify((0..100).random(), builder.build())
}
Here is the whole file code:
import android.app.Notification import android.app.NotificationChannel import android.app.NotificationManager import android.app.PendingIntent import android.content.Context import android.content.Intent import android.graphics.Bitmap import android.os.Build import android.util.Log import com.bumptech.glide.Glide import com.google.firebase.messaging.FirebaseMessagingService import com.google.firebase.messaging.RemoteMessage import com.techpaliyal.uniquegallery.R import com.techpaliyal.uniquegallery.activities.MainActivity import io.reactivex.Observable import io.reactivex.Observer import io.reactivex.android.schedulers.AndroidSchedulers import io.reactivex.disposables.Disposable import io.reactivex.schedulers.Schedulers import java.util.concurrent.Callable
class MyFirebaseMessangingService : FirebaseMessagingService(){
override fun onNewToken(p0: String) {
super.onNewToken(p0)
Log.d("TestingNotification",""+p0)
}
override fun onMessageReceived(remoteMessage: RemoteMessage) {
super.onMessageReceived(remoteMessage)
downloadImage(remoteMessage.notification)
}
private fun downloadImage(notification: RemoteMessage.Notification?) {
Observable.fromCallable(object : Callable<Bitmap?> {
override fun call(): Bitmap? {
val future = Glide.with(applicationContext).asBitmap()
.load(notification?.imageUrl).submit()
return future.get()
}
}).subscribeOn(Schedulers.io())
.observeOn(AndroidSchedulers.mainThread())
.subscribe(object : Observer<Bitmap?> {
override fun onComplete() {
}
override fun onSubscribe(d: Disposable) {
}
override fun onNext(t: Bitmap) {
showNotification(notification,t)
}
override fun onError(e: Throwable) {
showNotification(notification,null)
}
})
}
private fun showNotification(notification: RemoteMessage.Notification?, image: Bitmap?) {
val notificationManager = applicationContext.getSystemService(Context.NOTIFICATION_SERVICE) as NotificationManager
val channelId = getString(R.string.notification_channel_id)
val channelName = getString(R.string.notification_channel_name)
val importance = NotificationManager.IMPORTANCE_LOW
if (android.os.Build.VERSION.SDK_INT >= android.os.Build.VERSION_CODES.O) {
val mChannel = NotificationChannel(channelId, channelName, importance)
notificationManager.createNotificationChannel(mChannel)
}
val intent = Intent(applicationContext, MainActivity::class.java)
val pendingIntent = PendingIntent.getService(applicationContext, 1, intent, 0)
var builder: Notification.Builder? = null
if (android.os.Build.VERSION.SDK_INT >= android.os.Build.VERSION_CODES.O) {
builder = Notification.Builder(applicationContext, channelId)
} else {
builder = Notification.Builder(applicationContext)
}
if (android.os.Build.VERSION.SDK_INT >= Build.VERSION_CODES.LOLLIPOP) {
builder.setSmallIcon(R.mipmap.ic_launcher)
} else {
builder.setSmallIcon(R.mipmap.ic_launcher)
}
val title = if (notification?.title.toString().isNullOrEmpty()) {
getString(R.string.app_name)
}else{
notification?.title
}
val content = if (notification?.body.isNullOrEmpty()) {
getString(R.string.app_name)
}else{
notification?.body
}
builder.setContentTitle(title)
.setContentText(content)
.setDeleteIntent(pendingIntent)
if (image != null) {
builder.setStyle(Notification.BigPictureStyle().bigPicture(image))
}
if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.LOLLIPOP) {
builder.setVisibility(Notification.VISIBILITY_PUBLIC)
}
notificationManager.notify((0..100).random(), builder.build())
}
}
If having any question/doubts or feedback please comment below.
The post Firebase Messaging with Image in Android | Android Kotlin push notification appeared first on TechPaliyal.
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