Settings: Add preference to enable/disable assisted GPS.

Signed-off-by: Mike Lockwood <lockwood@android.com>

res/values/strings.xml

@@ -1143,6 +1143,12 @@
     <string name="location_street_level">When locating, accurate to street level (deselect to conserve battery)</string>
     <!-- Security & location settings screen, setting summary when Enable GPS satellites check box is clear -->
     <string name="location_gps_disabled">Locate to street-level (requires more battery plus view of sky)</string>
+    <!-- Security & location settings screen, setting check box label if Assisted GPS should be enabled -->
+    <string name="assisted_gps">Enable assisted GPS</string>
+    <!-- Security & location settings screen, setting summary when Assisted GPS check box is selected -->
+    <string name="assisted_gps_enabled">Use server to assist GPS (deselect to reduce network usage)</string>
+    <!-- Security & location settings screen, setting summary when Assisted GPS check box is clear -->
+    <string name="assisted_gps_disabled">Use server to assist GPS (select to improve GPS performance)</string>
     <!-- Setting title for allow sending location to google -->
     <string name="use_location_title">Share with Google</string>
     <!-- Title of dialog to user requesting use of location information to improve services -->

res/xml/security_settings.xml

@@ -32,6 +32,12 @@
             android:summaryOn="@string/location_street_level"
             android:summaryOff="@string/location_gps_disabled"/>
 
+        <CheckBoxPreference
+            android:key="assisted_gps"
+            android:title="@string/assisted_gps"
+            android:summaryOn="@string/assisted_gps_enabled"
+            android:summaryOff="@string/assisted_gps_disabled"/>
+
         <CheckBoxPreference
             android:key="use_location"
             android:title="@string/use_location_title"

src/com/android/settings/SecuritySettings.java

@@ -70,6 +70,7 @@ public class SecuritySettings extends PreferenceActivity implements
     private static final String LOCATION_CATEGORY = "location_category";
     private static final String LOCATION_NETWORK = "location_network";
     private static final String LOCATION_GPS = "location_gps";
+    private static final String ASSISTED_GPS = "assisted_gps";
 
     // Vendor specific
     private static final String GSETTINGS_PROVIDER = "com.google.android.providers.settings";
@@ -81,6 +82,7 @@ public class SecuritySettings extends PreferenceActivity implements
 
     private CheckBoxPreference mNetwork;
     private CheckBoxPreference mGps;
+    private CheckBoxPreference mAssistedGps;
 
     // These provide support for receiving notification when Location Manager settings change.
     // This is necessary because the Network Location Provider can change settings
@@ -103,6 +105,7 @@ public class SecuritySettings extends PreferenceActivity implements
 
         mNetwork = (CheckBoxPreference) getPreferenceScreen().findPreference(LOCATION_NETWORK);
         mGps = (CheckBoxPreference) getPreferenceScreen().findPreference(LOCATION_GPS);
+        mAssistedGps = (CheckBoxPreference) getPreferenceScreen().findPreference(ASSISTED_GPS);
         mUseLocation = (CheckBoxPreference) getPreferenceScreen().findPreference(USE_LOCATION);
 
         // Vendor specific
@@ -263,8 +266,13 @@ public class SecuritySettings extends PreferenceActivity implements
             Settings.Secure.setLocationProviderEnabled(getContentResolver(),
                     LocationManager.NETWORK_PROVIDER, mNetwork.isChecked());
         } else if (preference == mGps) {
+            boolean enabled = mGps.isChecked();
             Settings.Secure.setLocationProviderEnabled(getContentResolver(),
-                    LocationManager.GPS_PROVIDER, mGps.isChecked());
+                    LocationManager.GPS_PROVIDER, enabled);
+            mAssistedGps.setEnabled(enabled);
+        } else if (preference == mAssistedGps) {
+            Settings.Secure.putInt(getContentResolver(), Settings.Secure.ASSISTED_GPS_ENABLED,
+                    mAssistedGps.isChecked() ? 1 : 0);
         } else if (preference == mUseLocation) {
             //normally called on the toggle click
             if (mUseLocation.isChecked()) {
@@ -306,10 +314,14 @@ public class SecuritySettings extends PreferenceActivity implements
      */
     private void updateToggles() {
         ContentResolver res = getContentResolver();
+        boolean gpsEnabled = Settings.Secure.isLocationProviderEnabled(
+                res, LocationManager.GPS_PROVIDER);
         mNetwork.setChecked(Settings.Secure.isLocationProviderEnabled(
                 res, LocationManager.NETWORK_PROVIDER));
-        mGps.setChecked(Settings.Secure.isLocationProviderEnabled(
+        mGps.setChecked(gpsEnabled);
-                res, LocationManager.GPS_PROVIDER));
+        mAssistedGps.setChecked(Settings.Secure.getInt(res,
+                Settings.Secure.ASSISTED_GPS_ENABLED, 2) == 1);
+        mAssistedGps.setEnabled(gpsEnabled);
         mUseLocation.setChecked(Settings.Secure.getInt(res,
                 Settings.Secure.USE_LOCATION_FOR_SERVICES, 2) == 1);
     }