Android Notification With Big Picture Style

MyFirebaseMessagingService.kt

package com.app.base.firebase

import Preferences
import android.annotation.SuppressLint
import android.annotation.TargetApi
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.graphics.BitmapFactory
import android.graphics.Color
import android.graphics.drawable.Drawable
import android.media.RingtoneManager
import android.os.AsyncTask
import android.os.Build
import android.util.Log
import androidx.annotation.RequiresApi
import androidx.core.app.NotificationCompat
import com.app.base.ui.dashboard.DashboardActivity2
import com.app.base.utils.Constants
import com.app.base.utils.saveValue
import com.google.firebase.messaging.FirebaseMessagingService
import com.google.firebase.messaging.RemoteMessage
import com.squareup.picasso.Picasso
import com.squareup.picasso.Target
import java.io.IOException
import java.io.InputStream
import java.net.HttpURLConnection
import java.net.MalformedURLException
import java.net.URL
import java.util.*


class MyFirebaseMessagingService : FirebaseMessagingService() {
    private var notificationManager: NotificationManager? = null
    
	 companion object {
        private val ADMIN_CHANNEL_ID = "admin_channel"
    }
	
	@SuppressLint("WrongThread")
    override fun onMessageReceived(remoteMessage: RemoteMessage?) {
        super.onMessageReceived(remoteMessage)
        Log.d("Message", " " + remoteMessage)
        //sendMyNotification(remoteMessage!!.notification!!.body, remoteMessage)
        //.setContentTitle(remoteMessage.notification!!.title) //the "title" value you sent in your notification
        //.setContentText(remoteMessage.data["message"]) //ditto
        generatePictureStyleNotification(this, remoteMessage!!.notification!!.title.toString(), remoteMessage.data["message"].toString(), remoteMessage.data["largeIcon"].toString()).execute()
    }

    override fun onNewToken(token: String?) {
        super.onNewToken(token)
        Log.d("Token", " " + token)
        Preferences.prefs!!.saveValue(Constants.FCM_TOKEN, token)
    }

    @RequiresApi(api = Build.VERSION_CODES.O)
    private fun setupChannels() {
        val adminChannelName = "Global channel"
        val adminChannelDescription = "Notifications sent from the app admin"
        val adminChannel: NotificationChannel
        adminChannel = NotificationChannel(ADMIN_CHANNEL_ID, adminChannelName, NotificationManager.IMPORTANCE_LOW)
        adminChannel.description = adminChannelDescription
        adminChannel.enableLights(true)
        adminChannel.lightColor = Color.RED
        adminChannel.enableVibration(true)
        if (notificationManager != null) {
            notificationManager!!.createNotificationChannel(adminChannel)
        }
    }

   

    inner class generatePictureStyleNotification(private val mContext: Context, private val title: String, private val message: String, private val imageUrl: String) : AsyncTask<String, Void, Bitmap>() {

        override fun doInBackground(vararg params: String): Bitmap? {

            val `in`: InputStream
            try {
                val url = URL(this.imageUrl)
                val connection = url.openConnection() as HttpURLConnection
                connection.setDoInput(true)
                connection.connect()
                `in` = connection.getInputStream()
                return BitmapFactory.decodeStream(`in`)
            } catch (e: MalformedURLException) {
                e.printStackTrace()
            } catch (e: IOException) {
                e.printStackTrace()
            }

            return null
        }

        @TargetApi(Build.VERSION_CODES.JELLY_BEAN)
        override fun onPostExecute(largeIcon: Bitmap) {
            super.onPostExecute(largeIcon)
            //On click of notification it redirect to this Activity i.e. MainActivity
            val intent = Intent(mContext, DashboardActivity2::class.java)
            intent.addFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP)
            intent.putExtra("Notification", true);
            val pendingIntent = PendingIntent.getActivity(mContext, 0, intent, PendingIntent.FLAG_ONE_SHOT)

            notificationManager = getSystemService(Context.NOTIFICATION_SERVICE) as NotificationManager

            //Setting up Notification channels for android O and above
            if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.O) {
                setupChannels()
            }

            val notificationId = Random().nextInt(60000)
            val defaultSoundUri = RingtoneManager.getDefaultUri(RingtoneManager.TYPE_NOTIFICATION)
            val notificationBuilder = NotificationCompat.Builder(mContext, ADMIN_CHANNEL_ID)
            if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.LOLLIPOP) {
                notificationBuilder
                        .setSmallIcon(com.app.base.R.drawable.ic_background)  //a resource for your custom small icon
                        .setContentTitle(title) //the "title" value you sent in your notification
                        .setContentText(message) //ditto
                        .setLargeIcon(largeIcon)
                        .setStyle(NotificationCompat.BigPictureStyle().bigPicture(largeIcon))
                        .setAutoCancel(true)  //dismisses the notification on click
                        .setSound(defaultSoundUri)
                        .setContentIntent(pendingIntent)
            } else {
                notificationBuilder
                        .setSmallIcon(com.app.base.R.drawable.ic_background)  //a resource for your custom small icon
                        .setContentTitle(title) //the "title" value you sent in your notification
                        .setContentText(message) //ditto
                        .setContentText(message)
                        .setLargeIcon(largeIcon)
                        .setStyle(NotificationCompat.BigPictureStyle().bigPicture(largeIcon))
                        .setAutoCancel(true)  //dismisses the notification on click
                        .setSound(defaultSoundUri)
                        .setContentIntent(pendingIntent)
            }
            notificationManager!!.notify(notificationId /* ID of notification */, notificationBuilder.build())
        }
    }
}