title: Progress Notification not showing up in android 8.0
body: <p>Based on the received comments and links i modified the code like this to support android 8.0, but still the notification is not coming up, not getting any clue --</p>
  
  <pre><code>NotificationManager mNotifyManager;
          NotificationCompat.Builder mBuilder;
          NotificationChannel channel;
  
  protected void onPreExecute() {
              super.onPreExecute();
              if(Build.VERSION.SDK_INT &lt; 26)
              {
                  mNotifyManager = (NotificationManager) context.getSystemService(Context.NOTIFICATION_SERVICE);
              }
              else {
                  mNotifyManager =
                          (NotificationManager) context.getSystemService(Context.NOTIFICATION_SERVICE);
                  channel = new NotificationChannel("default",
                          "Channel name",
                          NotificationManager.IMPORTANCE_DEFAULT);
                  channel.setDescription("Channel description");
                  mNotifyManager.createNotificationChannel(channel);
              }
  
              mBuilder = new NotificationCompat.Builder(context, "default");
              mBuilder.setContentTitle("File Download")
                      .setContentText("Download in progress")
                      .setSmallIcon(R.mipmap.ic_launcher);
  
              Toast.makeText(context, "Downloading the file...", Toast.LENGTH_SHORT).show();
  
          }
  
  protected void onProgressUpdate(Integer... progress) {
  
              mBuilder.setProgress(100, progress[0], false);
              // Displays the progress bar on notification
              mNotifyManager.notify(0, mBuilder.build());
          }
  
          protected void onPostExecute(Void result){
              mBuilder.setContentText("Download complete");
              // Removes the progress bar
              mBuilder.setProgress(0,0,false);
              mNotifyManager.notify(0, mBuilder.build());
          }
  </code></pre>
  
  <p>Based on the received comments and links i modified the code like this to support android 8.0, but still the notification is not coming up, not getting any clue</p>