Code is OTP verification code Notification without using 🔥 firebase

final Context context = getApplicationContext();

NotificationManager notificationManager = (NotificationManager) context.getSystemService(Context.NOTIFICATION_SERVICE);


Intent intent = new Intent(this, MainActivity.class);
intent.setFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP | Intent.FLAG_ACTIVITY_SINGLE_TOP);
PendingIntent pendingIntent = PendingIntent.getActivity(this, 0, intent, 0);
androidx.core.app.NotificationCompat.Builder builder;


int notificationId = 1;
String channelId = "channel-01";
String channelName = "Channel Name";
int importance = NotificationManager.IMPORTANCE_HIGH;


if (android.os.Build.VERSION.SDK_INT >= android.os.Build.VERSION_CODES.O) {
NotificationChannel mChannel = new NotificationChannel(
channelId, channelName, importance);
notificationManager.createNotificationChannel(mChannel);
}
androidx.core.app.NotificationCompat.Builder mBuilder = new androidx.core.app.NotificationCompat.Builder(context, channelId)
.setSmallIcon(R.drawable.img2)
.setContentTitle(_title)
.setContentText(_message)
.setAutoCancel(true)
.setOngoing(false)
.setContentIntent(pendingIntent);
TaskStackBuilder stackBuilder = TaskStackBuilder.create(context);
stackBuilder.addNextIntent(intent);
PendingIntent resultPendingIntent = stackBuilder.getPendingIntent(
0,
PendingIntent.FLAG_UPDATE_CURRENT
);
mBuilder.setContentIntent(resultPendingIntent);


notificationManager.notify(notificationId, mBuilder.build());