From d0c73d637370eba760d1ed4a1acb8f1e8354757d Mon Sep 17 00:00:00 2001
From: Jeff Sharkey <jsharkey@google.com>
Date: Wed, 29 Mar 2023 13:56:09 -0600
Subject: [PATCH] Only deliver latest WIFI_DISPLAY_STATUS_CHANGED.

We've heard reports of apps getting confused about hearing thrashing
WIFI_DISPLAY_STATUS_CHANGED broadcasts when they're thawed.  To
mitigate this, only deliver the latest instance of the broadcast,
replacing any stale broadcasts.

Bug: 273923757
Test: manual
Change-Id: Ie8e4a7213f7b4838b33fdc6cf4ccca9520ad49f9
---
 .../com/android/server/display/WifiDisplayAdapter.java     | 7 ++++++-
 1 file changed, 6 insertions(+), 1 deletion(-)

diff --git a/services/core/java/com/android/server/display/WifiDisplayAdapter.java b/services/core/java/com/android/server/display/WifiDisplayAdapter.java
index e8327018e1440..e3d38e7a25e91 100644
--- a/services/core/java/com/android/server/display/WifiDisplayAdapter.java
+++ b/services/core/java/com/android/server/display/WifiDisplayAdapter.java
@@ -16,6 +16,7 @@
 
 package com.android.server.display;
 
+import android.app.BroadcastOptions;
 import android.content.BroadcastReceiver;
 import android.content.Context;
 import android.content.Intent;
@@ -421,6 +422,7 @@ final class WifiDisplayAdapter extends DisplayAdapter {
     // Runs on the handler.
     private void handleSendStatusChangeBroadcast() {
         final Intent intent;
+        final BroadcastOptions options;
         synchronized (getSyncRoot()) {
             if (!mPendingStatusChangeBroadcast) {
                 return;
@@ -431,10 +433,13 @@ final class WifiDisplayAdapter extends DisplayAdapter {
             intent.addFlags(Intent.FLAG_RECEIVER_REGISTERED_ONLY);
             intent.putExtra(DisplayManager.EXTRA_WIFI_DISPLAY_STATUS,
                     getWifiDisplayStatusLocked());
+
+            options = BroadcastOptions.makeBasic();
+            options.setDeliveryGroupPolicy(BroadcastOptions.DELIVERY_GROUP_POLICY_MOST_RECENT);
         }
 
         // Send protected broadcast about wifi display status to registered receivers.
-        getContext().sendBroadcastAsUser(intent, UserHandle.ALL);
+        getContext().sendBroadcastAsUser(intent, UserHandle.ALL, null, options.toBundle());
     }
 
     private final BroadcastReceiver mBroadcastReceiver = new BroadcastReceiver() {