1 files changed, 23 insertions, 2 deletions
diff --git a/java/com/android/dialer/app/calllog/VisualVoicemailUpdateTask.java b/java/com/android/dialer/app/calllog/VisualVoicemailUpdateTask.java
index e3279ce26..2e12cecf7 100644
--- a/java/com/android/dialer/app/calllog/VisualVoicemailUpdateTask.java
+++ b/java/com/android/dialer/app/calllog/VisualVoicemailUpdateTask.java
@@ -67,9 +67,11 @@ class VisualVoicemailUpdateTask implements Worker<VisualVoicemailUpdateTask.Inpu
       // Query failed, just return
       return;
     }
-    boolean shouldAlert = !voicemailsToNotify.isEmpty();
-    voicemailsToNotify.addAll(getAndUpdateVoicemailsWithExistingNotification(context, queryHelper));
     voicemailsToNotify = filterBlockedNumbers(context, queryHandler, voicemailsToNotify);
+    boolean shouldAlert =
+        !voicemailsToNotify.isEmpty()
+            && voicemailsToNotify.size() > getExistingNotificationCount(context);
+    voicemailsToNotify.addAll(getAndUpdateVoicemailsWithExistingNotification(context, queryHelper));
     if (voicemailsToNotify.isEmpty()) {
       LogUtil.i("VisualVoicemailUpdateTask.updateNotification", "no voicemails to notify about");
       VisualVoicemailNotifier.cancelAllVoicemailNotifications(context);
@@ -107,6 +109,25 @@ class VisualVoicemailUpdateTask implements Worker<VisualVoicemailUpdateTask.Inpu
     VoicemailNotificationJobService.scheduleJob(context);
   }
 
+  @WorkerThread
+  @NonNull
+  private static int getExistingNotificationCount(Context context) {
+    Assert.isWorkerThread();
+    int result = 0;
+    for (StatusBarNotification notification :
+        DialerNotificationManager.getActiveNotifications(context)) {
+      if (notification.getId() != VisualVoicemailNotifier.NOTIFICATION_ID) {
+        continue;
+      }
+      if (TextUtils.isEmpty(notification.getTag())
+          || !notification.getTag().startsWith(VisualVoicemailNotifier.NOTIFICATION_TAG_PREFIX)) {
+        continue;
+      }
+      result++;
+    }
+    return result;
+  }
+
   /**
    * Cancel notification for voicemail that is already deleted. Returns a list of voicemails that
    * already has notifications posted and should be updated.