From 6b094edbb54f0fed2eec9fc49ee876c377fb1a6a Mon Sep 17 00:00:00 2001
From: lindatseng <lindatseng@google.com>
Date: Tue, 2 Apr 2019 13:07:11 -0700
Subject: [PATCH] Make DevloperOptions frag listen to sysprop change

Add System Properties change callback in
DevelopmentSettingsDashboardFragment, to listen to the changed
and update preference states accordingly.

This will fix the bug that the pref is not updated accordingly
when user modifies the setting from quick-settings.

Test: Manual/Visual Verification
Fixes: 127761520
Change-Id: I478775902a1d0df1e91f98027d4b8d65d6e9fd28
---
 .../DevelopmentSettingsDashboardFragment.java  | 18 +++++++++++++++++-
 1 file changed, 17 insertions(+), 1 deletion(-)

diff --git a/src/com/android/settings/development/DevelopmentSettingsDashboardFragment.java b/src/com/android/settings/development/DevelopmentSettingsDashboardFragment.java
index 77b104b66f1..9af8891e390 100644
--- a/src/com/android/settings/development/DevelopmentSettingsDashboardFragment.java
+++ b/src/com/android/settings/development/DevelopmentSettingsDashboardFragment.java
@@ -27,6 +27,7 @@ import android.content.Context;
 import android.content.Intent;
 import android.content.IntentFilter;
 import android.os.Bundle;
+import android.os.SystemProperties;
 import android.os.UserManager;
 import android.provider.SearchIndexableResource;
 import android.util.Log;
@@ -136,6 +137,20 @@ public class DevelopmentSettingsDashboardFragment extends RestrictedDashboardFra
                 }
             };
 
+    private final Runnable mSystemPropertiesChanged = new Runnable() {
+        @Override
+        public void run() {
+            synchronized (this) {
+                Activity activity = getActivity();
+                if (activity != null) {
+                    activity.runOnUiThread(() -> {
+                        updatePreferenceStates();
+                    });
+                }
+            }
+        }
+    };
+
     public DevelopmentSettingsDashboardFragment() {
         super(UserManager.DISALLOW_DEBUGGING_FEATURES);
     }
@@ -184,7 +199,7 @@ public class DevelopmentSettingsDashboardFragment extends RestrictedDashboardFra
     public View onCreateView(LayoutInflater inflater, ViewGroup container,
             Bundle savedInstanceState) {
         registerReceivers();
-
+        SystemProperties.addChangeCallback(mSystemPropertiesChanged);
         final BluetoothAdapter adapter = BluetoothAdapter.getDefaultAdapter();
         if (adapter != null) {
             adapter.getProfileProxy(getActivity(), mBluetoothA2dpServiceListener,
@@ -203,6 +218,7 @@ public class DevelopmentSettingsDashboardFragment extends RestrictedDashboardFra
             adapter.closeProfileProxy(BluetoothProfile.A2DP, mBluetoothA2dp);
             mBluetoothA2dp = null;
         }
+        SystemProperties.removeChangeCallback(mSystemPropertiesChanged);
     }
 
     @Override