old_contents: from jnius import autoclass
  from plyer.facades import Notification
  from plyer.platforms.android import activity, SDK_INT
  
  AndroidString = autoclass('java.lang.String')
  Context = autoclass('android.content.Context')
  NotificationBuilder = autoclass('android.app.Notification$Builder')
  Drawable = autoclass("{}.R$drawable".format(activity.getPackageName()))
  
  
  class AndroidNotification(Notification):
      def _get_notification_service(self):
          if not hasattr(self, '_ns'):
              self._ns = activity.getSystemService(Context.NOTIFICATION_SERVICE)
          return self._ns
  
      def _notify(self, **kwargs):
          icon = getattr(Drawable, kwargs.get('icon_android', 'icon'))
          noti = NotificationBuilder(activity)
          noti.setContentTitle(AndroidString(
              kwargs.get('title').encode('utf-8')))
          noti.setContentText(AndroidString(
              kwargs.get('message').encode('utf-8')))
          noti.setSmallIcon(icon)
          noti.setAutoCancel(True)
  
          if SDK_INT >= 16:
              noti = noti.build()
          else:
              noti = noti.getNotification()
  
          self._get_notification_service().notify(0, noti.build())
  
  
  def instance():
      return AndroidNotification()
  
  
new_contents: from jnius import autoclass
  from plyer.facades import Notification
  from plyer.platforms.android import activity, SDK_INT
  
  AndroidString = autoclass('java.lang.String')
  Context = autoclass('android.content.Context')
  NotificationBuilder = autoclass('android.app.Notification$Builder')
  Drawable = autoclass("{}.R$drawable".format(activity.getPackageName()))
  
  
  class AndroidNotification(Notification):
      def _get_notification_service(self):
          if not hasattr(self, '_ns'):
              self._ns = activity.getSystemService(Context.NOTIFICATION_SERVICE)
          return self._ns
  
      def _notify(self, **kwargs):
          icon = getattr(Drawable, kwargs.get('icon_android', 'icon'))
          noti = NotificationBuilder(activity)
          noti.setContentTitle(AndroidString(
              kwargs.get('title').encode('utf-8')))
          noti.setContentText(AndroidString(
              kwargs.get('message').encode('utf-8')))
          noti.setSmallIcon(icon)
          noti.setAutoCancel(True)
  
          if SDK_INT >= 16:
              noti = noti.build()
          else:
              noti = noti.getNotification()
  
          self._get_notification_service().notify(0, noti)
  
  
  def instance():
      return AndroidNotification()
  
  
subject: fix androidd notification. Closes #93 (credits to @kashifpk)