how to get received telephone number from Whatsapp Notification?

Question

I want to get message from Whatsapp.I can whatsapp message but how to get received telephone number from Whatsapp Notification?

My code in NotificationListener;

 @Override
public void onNotificationPosted(StatusBarNotification sbn) {
    super.onNotificationPosted(sbn);
    Intent broadcastIntent =new Intent("android.settings.ACTION_NOTIFICATION_LISTENER_SETTINGS");
    OpenNotification(sbn.getNotification().extras.toString());
    if (sbn.getPackageName().equals(WHATSAPP_PACK_NAME) && isRecordStart) {
        Bundle bundle = sbn.getNotification().extras;
        String fromContact = bundle.getString("android.title");
        String messageText = bundle.getString("android.text");
        String pushTel = ""// HOW CAN I GET THE NUMBER FROM WHATSAPP?
        String text = bundle.getCharSequence("android.text").toString();
        System.out.println("whatsapp messageText :"+messageText+" text:"+text+" fromContact:"+fromContact+" pushTel:"+pushTel);
        if (fromContact.equals("WhatsApp")) {
            return;
        }
        Toast.makeText(this, ""+messageText.toString(), Toast.LENGTH_SHORT).show();
        broadcastIntent.putExtra("key_whatsapp_Content", messageText);
        LocalBroadcastManager.getInstance(this).sendBroadcast(broadcastIntent);
    }
}