xamarin.android device to device notification - xamarin.android

Question

I can send notification to specific user from firbase consol but I want to send notification from one device to another specific user device using button click event.Thanks in advance for your support in this regards.
var btnSendNotification = FindViewById<Button>(Resource.Id.btnSendNotification);
btnSendNotification.Click += delegate
{
//this details i will get from EditTextTitle,EditTextMessage,EditTextToken
string title = "title";
string message = "message";
string token = "token";
};
Here adding my current codes for your reference.
MyFirebaseMessagingService class
using System;
using Android.App;
using Android.Content;
using Android.Media;
using Android.Util;
using Firebase.Messaging;
using FCMClient;
using System.Collections.Generic;
using AndroidX.Core.App;
namespace FCMClient
{
[Service]
[IntentFilter(new[] { "com.google.firebase.MESSAGING_EVENT" })]
public class MyFirebaseMessagingService : FirebaseMessagingService
{
const string TAG = "MyFirebaseMsgService";
public override void OnMessageReceived(RemoteMessage message)
{
Log.Debug(TAG, "From: " + message.From);
// Log.Debug(TAG, "Notification Message Body: " +
message.GetNotification().Body);
var body = message.GetNotification().Body;
Log.Debug(TAG, "Notification Message Body: " + body);
SendNotification(body, message.Data);
}
void SendNotification(string messageBody, IDictionary<string, string> data)
{
var intent = new Intent(this, typeof(MainActivity));
intent.AddFlags(ActivityFlags.ClearTop);
foreach (var key in data.Keys)
{
intent.PutExtra(key, data[key]);
}
var pendingIntent = PendingIntent.GetActivity(this,
MainActivity.NOTIFICATION_ID,
intent,
PendingIntentFlags.OneShot);
var notificationBuilder = new NotificationCompat.Builder(this, MainActivity.CHANNEL_ID)
.SetSmallIcon(Resource.Drawable.abc_ic_star_black_36dp)
.SetContentTitle("FCM Message")
.SetContentText(messageBody)
.SetAutoCancel(true)
.SetContentIntent(pendingIntent);
var notificationManager = NotificationManagerCompat.From(this);
notificationManager.Notify(MainActivity.NOTIFICATION_ID,
notificationBuilder.Build());
}
}
}
MyFirebaseIIDService class
using System;
using Android.App;
using Firebase.Iid;
using Android.Util;
namespace FCMClient
{
[Service]
[IntentFilter(new[] { "com.google.firebase.INSTANCE_ID_EVENT" })]
public class MyFirebaseIIDService : FirebaseInstanceIdService
{
const string TAG = "MyFirebaseIIDService";
public override void OnTokenRefresh()
{
var refreshedToken = FirebaseInstanceId.Instance.Token;
Log.Debug(TAG, "Refreshed token: " + refreshedToken);
}
}
}
MainActivity
using Android.OS;
using Android.Runtime;
using AndroidX.AppCompat.App;
using Android.Gms.Common;
using Firebase.Messaging;
using Firebase.Iid;
using Android.Util;
using Android.Widget;
namespace FCMClient
{
[Activity(Label = "#string/app_name", Theme = "#style/AppTheme", MainLauncher = true)]
public class MainActivity : AppCompatActivity
{
static readonly string TAG = "MainActivity";
internal static readonly string CHANNEL_ID = "my_notification_channel";
internal static readonly int NOTIFICATION_ID = 100;
TextView msgText;
protected override void OnCreate(Bundle savedInstanceState)
{
base.OnCreate(savedInstanceState);
Xamarin.Essentials.Platform.Init(this, savedInstanceState);
// Set our view from the "main" layout resource
SetContentView(Resource.Layout.activity_main);
msgText = FindViewById<TextView>(Resource.Id.msgText);
IsPlayServicesAvailable();
CreateNotificationChannel();
var logTokenButton = FindViewById<Button>(Resource.Id.logTokenButton);
logTokenButton.Click += delegate
{
Log.Debug(TAG, "InstanceID token: " + FirebaseInstanceId.Instance.Token);
};
var btnSendNotification = FindViewById<Button>(Resource.Id.btnSendNotification);
btnSendNotification.Click += delegate
{
//this details i will get from EditTextTitle,EditTextMessage,EditTextToken
string title = "title";
string message = "message";
string token = "token";
};
}
public bool IsPlayServicesAvailable()
{
int resultCode =
GoogleApiAvailability.Instance.IsGooglePlayServicesAvailable(this);
if (resultCode != ConnectionResult.Success)
{
if (GoogleApiAvailability.Instance.IsUserResolvableError(resultCode))
msgText.Text = GoogleApiAvailability.Instance.GetErrorString(resultCode);
else
{
msgText.Text = "This device is not supported";
Finish();
}
return false;
}
else
{
msgText.Text = "Google Play Services is available.";
return true;
}
}
void CreateNotificationChannel()
{
if (Build.VERSION.SdkInt < BuildVersionCodes.O)
{
// Notification channels are new in API 26 (and not a part of the
// support library). There is no need to create a notification
// channel on older versions of Android.
return;
}
var channel = new NotificationChannel(CHANNEL_ID,
"FCM Notifications",
NotificationImportance.Default)
{
Description = "Firebase Cloud Messages appear in this channel"
};
var notificationManager = (NotificationManager)GetSystemService(Android.Content.Context.NotificationService);
notificationManager.CreateNotificationChannel(channel);
}
public override void OnRequestPermissionsResult(int requestCode, string[] permissions, [GeneratedEnum] Android.Content.PM.Permission[] grantResults)
{
Xamarin.Essentials.Platform.OnRequestPermissionsResult(requestCode, permissions, grantResults);
base.OnRequestPermissionsResult(requestCode, permissions, grantResults);
}
}
}