Notify user when wi-fi is toggled about scans

We let the user know when he turns off Wi-Fi that scans will continue to
be available.

User has the option to turn off the dialog and not receive this in the future.

Bug: 8141918
Change-Id: I115ce2ac57125b8ffbb34245dc25effd4b3bebb0

3 files changed, 29 insertions, 0 deletions

diff --git a/core/java/android/provider/Settings.java b/core/java/android/provider/Settings.java
index d251ca2..8346cc1 100644
--- a/core/java/android/provider/Settings.java
+++ b/core/java/android/provider/Settings.java
@@ -4791,6 +4791,14 @@ public final class Settings {
                 "wifi_scan_always_enabled";
 
        /**
+        * Setting to indicate whether the user should be notified that scans are still
+        * available when Wi-Fi is turned off
+        * @hide
+        */
+       public static final String WIFI_NOTIFY_SCAN_ALWAYS_AVAILABLE =
+                "wifi_notify_scan_always_enabled";
+
+       /**
         * Used to save the Wifi_ON state prior to tethering.
         * This state will be checked to restore Wifi after
         * the user turns off tethering.
diff --git a/services/java/com/android/server/wifi/WifiService.java b/services/java/com/android/server/wifi/WifiService.java
index c46f217..9dde58f 100644
--- a/services/java/com/android/server/wifi/WifiService.java
+++ b/services/java/com/android/server/wifi/WifiService.java
@@ -396,6 +396,18 @@ public final class WifiService extends IWifiManager.Stub {
 
         long ident = Binder.clearCallingIdentity();
         try {
+
+            /* Turning off Wi-Fi when scans are still available */
+            if (!enable && isScanningAlwaysAvailable()) {
+                /* This can be changed by user in the app to not be notified again */
+                boolean notifyUser = (Settings.Global.getInt(mContext.getContentResolver(),
+                        Settings.Global.WIFI_NOTIFY_SCAN_ALWAYS_AVAILABLE, 1) == 1);
+                if (notifyUser) {
+                    Intent intent = new Intent(WifiManager.ACTION_NOTIFY_SCAN_ALWAYS_AVAILABLE);
+                    mContext.startActivityAsUser(intent, null, UserHandle.CURRENT);
+                }
+            }
+
             if (! mSettingsStore.handleWifiToggled(enable)) {
                 // Nothing to do if wifi cannot be toggled
                 return true;
diff --git a/wifi/java/android/net/wifi/WifiManager.java b/wifi/java/android/net/wifi/WifiManager.java
index f654310..0c0a144 100644
--- a/wifi/java/android/net/wifi/WifiManager.java
+++ b/wifi/java/android/net/wifi/WifiManager.java
@@ -408,6 +408,15 @@ public class WifiManager {
             "android.net.wifi.action.REQUEST_SCAN_ALWAYS_AVAILABLE";
 
     /**
+     * Activity Action: Show a system activity that notifies the user that
+     * scanning is still available when Wi-Fi is turned off
+     * @hide
+     */
+    @SdkConstant(SdkConstantType.ACTIVITY_INTENT_ACTION)
+    public static final String ACTION_NOTIFY_SCAN_ALWAYS_AVAILABLE =
+            "android.net.wifi.action.NOTIFY_SCAN_ALWAYS_AVAILABLE";
+
+    /**
      * Activity Action: Pick a Wi-Fi network to connect to.
      * <p>Input: Nothing.
      * <p>Output: Nothing.