From cbdcca6cf6326af64b13832b797cf28250e0a417 Mon Sep 17 00:00:00 2001
From: xinhe <xinhe@google.com>
Date: Mon, 13 Jul 2015 15:26:45 -0700
Subject: [PATCH] Need to disable 5GHz bands for WiFi tethering in Japan

b/22396383

Change-Id: I99090f28eff1b232ebba89ff638e37be82a3f21b
---
 res/values/strings.xml                        |  2 ++
 .../android/settings/wifi/WifiApEnabler.java  | 19 +++++++++++++++----
 2 files changed, 17 insertions(+), 4 deletions(-)

diff --git a/res/values/strings.xml b/res/values/strings.xml
index d90f6e92d1d..ea0d34a8c6b 100644
--- a/res/values/strings.xml
+++ b/res/values/strings.xml
@@ -1380,6 +1380,8 @@
     <string name="wifi_stopping">Turning off Wi\u2011Fi\u2026</string>
     <!-- Summary text when Wi-Fi or bluetooth has error -->
     <string name="wifi_error">Error</string>
+    <!-- Summary text when wifi SoftAP started failed due to no legal usable channel allowed in this region by regulatory -->
+    <string name="wifi_sap_no_channel_error">5 GHz band not available in this country</string>
     <!-- Toast message when Wi-Fi or bluetooth is disallowed in airplane mode -->
     <string name="wifi_in_airplane_mode">In Airplane mode</string>
     <!-- Checkbox title for option to notify user when open networks are nearby -->
diff --git a/src/com/android/settings/wifi/WifiApEnabler.java b/src/com/android/settings/wifi/WifiApEnabler.java
index bf2fa38ef4f..741c4a7e2c3 100644
--- a/src/com/android/settings/wifi/WifiApEnabler.java
+++ b/src/com/android/settings/wifi/WifiApEnabler.java
@@ -47,8 +47,15 @@ public class WifiApEnabler {
         public void onReceive(Context context, Intent intent) {
             String action = intent.getAction();
             if (WifiManager.WIFI_AP_STATE_CHANGED_ACTION.equals(action)) {
-                handleWifiApStateChanged(intent.getIntExtra(
-                        WifiManager.EXTRA_WIFI_AP_STATE, WifiManager.WIFI_AP_STATE_FAILED));
+                int state = intent.getIntExtra(
+                        WifiManager.EXTRA_WIFI_AP_STATE, WifiManager.WIFI_AP_STATE_FAILED);
+                if (state == WifiManager.WIFI_AP_STATE_FAILED) {
+                    int reason = intent.getIntExtra(WifiManager.EXTRA_WIFI_AP_FAILURE_REASON,
+                            WifiManager.SAP_START_FAILURE_GENERAL);
+                    handleWifiApStateChanged(state, reason);
+                } else {
+                    handleWifiApStateChanged(state, WifiManager.SAP_START_FAILURE_GENERAL);
+                }
             } else if (ConnectivityManager.ACTION_TETHER_STATE_CHANGED.equals(action)) {
                 ArrayList<String> available = intent.getStringArrayListExtra(
                         ConnectivityManager.EXTRA_AVAILABLE_TETHER);
@@ -142,7 +149,7 @@ public class WifiApEnabler {
         }
     }
 
-    private void handleWifiApStateChanged(int state) {
+    private void handleWifiApStateChanged(int state, int reason) {
         switch (state) {
             case WifiManager.WIFI_AP_STATE_ENABLING:
                 mSwitch.setSummary(R.string.wifi_tether_starting);
@@ -169,7 +176,11 @@ public class WifiApEnabler {
                 break;
             default:
                 mSwitch.setChecked(false);
-                mSwitch.setSummary(R.string.wifi_error);
+                if (reason == WifiManager.SAP_START_FAILURE_NO_CHANNEL) {
+                    mSwitch.setSummary(R.string.wifi_sap_no_channel_error);
+                } else {
+                    mSwitch.setSummary(R.string.wifi_error);
+                }
                 enableWifiSwitch();
         }
     }