From b1c0e0b1c93acbc71a2063411ae4ac86f9fc9fbf Mon Sep 17 00:00:00 2001
From: Irfan Sheriff <isheriff@google.com>
Date: Thu, 15 Sep 2011 14:45:25 -0700
Subject: [PATCH] Fix settings handling of wifi events

When wifi events come out, settings has to change the switch state.
Changing switch state causes settings to also enable/disable wifi which
gets into a loop when there is a driver hung event.

Fix to only send framework calls when a user has changed the switch
settings

Bug: 5271322
Change-Id: I0a7d03a3fe0f28622de05981e5f72a9a8814b2d2
---
 .../android/settings/wifi/WifiEnabler.java    | 20 ++++++++++++++++---
 1 file changed, 17 insertions(+), 3 deletions(-)

diff --git a/src/com/android/settings/wifi/WifiEnabler.java b/src/com/android/settings/wifi/WifiEnabler.java
index 223022dde1a..987294b5908 100644
--- a/src/com/android/settings/wifi/WifiEnabler.java
+++ b/src/com/android/settings/wifi/WifiEnabler.java
@@ -40,6 +40,7 @@ public class WifiEnabler implements CompoundButton.OnCheckedChangeListener  {
     private AtomicBoolean mConnected = new AtomicBoolean(false);
 
     private final WifiManager mWifiManager;
+    private boolean mStateMachineEvent;
     private final IntentFilter mIntentFilter;
     private final BroadcastReceiver mReceiver = new BroadcastReceiver() {
         @Override
@@ -98,6 +99,10 @@ public class WifiEnabler implements CompoundButton.OnCheckedChangeListener  {
     }
 
     public void onCheckedChanged(CompoundButton buttonView, boolean isChecked) {
+        //Do nothing if called as a result of a state machine event
+        if (mStateMachineEvent) {
+            return;
+        }
         // Show toast message if Wi-Fi is not allowed in airplane mode
         if (isChecked && !WirelessSettings.isRadioAllowed(mContext, Settings.System.RADIO_WIFI)) {
             Toast.makeText(mContext, R.string.wifi_in_airplane_mode, Toast.LENGTH_SHORT).show();
@@ -127,19 +132,28 @@ public class WifiEnabler implements CompoundButton.OnCheckedChangeListener  {
                 mSwitch.setEnabled(false);
                 break;
             case WifiManager.WIFI_STATE_ENABLED:
-                mSwitch.setChecked(true);
+                setSwitchChecked(true);
                 mSwitch.setEnabled(true);
                 break;
             case WifiManager.WIFI_STATE_DISABLING:
                 mSwitch.setEnabled(false);
                 break;
             case WifiManager.WIFI_STATE_DISABLED:
-                mSwitch.setChecked(false);
+                setSwitchChecked(false);
                 mSwitch.setEnabled(true);
                 break;
             default:
-                mSwitch.setChecked(false);
+                setSwitchChecked(false);
                 mSwitch.setEnabled(true);
+                break;
+        }
+    }
+
+    private void setSwitchChecked(boolean checked) {
+        if (checked != mSwitch.isChecked()) {
+            mStateMachineEvent = true;
+            mSwitch.setChecked(checked);
+            mStateMachineEvent = false;
         }
     }