Remove / re-word some settings for WiFi-only devices.

Bug: 3468248

1. Remove Wireless->Mobile networks
2. Remove Wireless->Tethering and WiFi hotspot
3. Remove Wireless->Wi-Fi Settings->Wi-Fi disconnect policy
4. Re-word Network location summary text to not include "mobile network"

Change-Id: I84a551a1b63591974731029b0d4b90a85e43a716

res/values/strings.xml

@@ -1852,6 +1852,8 @@
     <string name="location_networks_disabled">See location in applications (such as Maps) using wireless networks</string>
     <!-- Security & location settings screen, setting summary when Use wireless networks check box is selected -->
     <string name="location_neighborhood_level">Location determined by Wi-Fi and/or mobile networks</string>
+    <!-- Security & location settings screen, setting summary when Use wireless networks check box is selected, for wifi-only devices [CHAR LIMIT=100] -->
+    <string name="location_neighborhood_level_wifi">Location determined by Wi-Fi</string>
     <!-- Security & location settings screen, setting check box label if the GPS receiver should be enabled -->
     <string name="location_gps">Use GPS satellites</string>
     <!-- [CHAR LIMIT=100] Security & location settings screen, setting summary when Use GPS satellites check box is selected -->

res/xml/wireless_settings.xml

@@ -72,6 +72,7 @@
         android:persistent="false" />
 
     <PreferenceScreen
+        android:key="mobile_network_settings"
         android:title="@string/network_settings_title"
         android:summary="@string/network_settings_summary"
         android:dependency="toggle_airplane">

src/com/android/settings/SecuritySettings.java

@@ -160,6 +160,11 @@ public class SecuritySettings extends SettingsPreferenceFragment
             mUseLocation = useLocation;
         }
 
+        // Change the summary for wifi-only devices
+        if (Utils.isWifiOnly()) {
+            mNetwork.setSummaryOn(R.string.location_neighborhood_level_wifi);
+        }
+
         // Add options for lock/unlock screen
         int resid = 0;
         if (!mLockPatternUtils.isSecure()) {

src/com/android/settings/Utils.java

@@ -278,4 +278,8 @@ public class Utils {
                 (TelephonyManager) context.getSystemService(Context.TELEPHONY_SERVICE);
         return telephony != null && telephony.isVoiceCapable();
     }
+
+    public static boolean isWifiOnly() {
+        return "wifi-only".equals(SystemProperties.get("ro.carrier"));
+    }
 }

src/com/android/settings/WirelessSettings.java

@@ -48,6 +48,7 @@ public class WirelessSettings extends SettingsPreferenceFragment {
     private static final String KEY_VPN_SETTINGS = "vpn_settings";
     private static final String KEY_TETHER_SETTINGS = "tether_settings";
     private static final String KEY_PROXY_SETTINGS = "proxy_settings";
+    private static final String KEY_MOBILE_NETWORK_SETTINGS = "mobile_network_settings";
 
     public static final String EXIT_ECM_RESULT = "exit_ecm_result";
     public static final int REQUEST_CODE_EXIT_ECM = 1;
@@ -131,6 +132,11 @@ public class WirelessSettings extends SettingsPreferenceFragment {
             getPreferenceScreen().removePreference(nfc);
         }
 
+        // Remove Mobile Network Settings if it's a wifi-only device.
+        if (Utils.isWifiOnly()) {
+            getPreferenceScreen().removePreference(findPreference(KEY_MOBILE_NETWORK_SETTINGS));
+        }
+
         // Enable Proxy selector settings if allowed.
         Preference mGlobalProxy = findPreference(KEY_PROXY_SETTINGS);
         DevicePolicyManager mDPM = (DevicePolicyManager)
@@ -139,10 +145,10 @@ public class WirelessSettings extends SettingsPreferenceFragment {
         getPreferenceScreen().removePreference(mGlobalProxy);
         mGlobalProxy.setEnabled(mDPM.getGlobalProxyAdmin() == null);
 
-        // Disable Tethering if it's not allowed
+        // Disable Tethering if it's not allowed or if it's a wifi-only device
         ConnectivityManager cm =
                 (ConnectivityManager) activity.getSystemService(Context.CONNECTIVITY_SERVICE);
-        if (!cm.isTetheringSupported()) {
+        if (!cm.isTetheringSupported() || Utils.isWifiOnly()) {
             getPreferenceScreen().removePreference(findPreference(KEY_TETHER_SETTINGS));
         } else {
             String[] usbRegexs = cm.getTetherableUsbRegexs();

src/com/android/settings/wifi/WifiSettings.java

@@ -21,6 +21,7 @@ import static android.net.wifi.WifiConfiguration.INVALID_NETWORK_ID;
 import com.android.settings.ProgressCategoryBase;
 import com.android.settings.R;
 import com.android.settings.SettingsPreferenceFragment;
+import com.android.settings.Utils;
 
 import android.app.Activity;
 import android.app.AlertDialog;
@@ -211,12 +212,16 @@ public class WifiSettings extends SettingsPreferenceFragment
 
             ListPreference pref = (ListPreference) findPreference(KEY_SLEEP_POLICY);
             if (pref != null) {
+                if (Utils.isWifiOnly()) {
+                    getPreferenceScreen().removePreference(pref);
+                } else {
                     pref.setOnPreferenceChangeListener(this);
                     int value = Settings.System.getInt(getContentResolver(),
                             Settings.System.WIFI_SLEEP_POLICY,
                             Settings.System.WIFI_SLEEP_POLICY_NEVER);
                     pref.setValue(String.valueOf(value));
                 }
+            }
 
             registerForContextMenu(getListView());
             setHasOptionsMenu(true);