Add the interface to check the status of location setting.

Bug: 30790766
Test: ag/1346969

Change-Id: Id6de284ba90f75015372dbe28805bdc0d94a0723

src/com/android/settings/fuelgauge/PowerUsageDetail.java

@@ -57,6 +57,7 @@ import com.android.settings.applications.InstalledAppDetails;
 import com.android.settings.applications.LayoutPreference;
 import com.android.settings.bluetooth.BluetoothSettings;
 import com.android.settings.location.LocationSettings;
+import com.android.settings.overlay.FeatureFactory;
 import com.android.settings.wifi.WifiSettings;
 
 import java.io.PrintWriter;
@@ -328,6 +329,7 @@ public class PowerUsageDetail extends PowerUsageBase implements Button.OnClickLi
     private long mStartTime;
     private BatterySipper.DrainType mDrainType;
     private double mNoCoverage; // Percentage of time that there was no coverage
+    private PowerUsageFeatureProvider mPowerUsageFeatureProvider;
 
     private PreferenceCategory mDetailsParent;
     private PreferenceCategory mControlsParent;
@@ -355,6 +357,9 @@ public class PowerUsageDetail extends PowerUsageBase implements Button.OnClickLi
         mMessagesParent = (PreferenceCategory) findPreference(KEY_MESSAGES_PARENT);
         mPackagesParent = (PreferenceCategory) findPreference(KEY_PACKAGES_PARENT);
 
+        mPowerUsageFeatureProvider =
+                FeatureFactory.getFactory(getActivity()).getPowerUsageFeatureProvider();
+
         createDetails();
     }
 
@@ -604,9 +609,11 @@ public class PowerUsageDetail extends PowerUsageBase implements Button.OnClickLi
                     // If the application has a settings screen, jump to  that
                     // TODO:
                 }
+
                 // If power usage detail page is launched from location page, suppress "Location"
                 // button to prevent circular loops.
-                if (mUsesGps && mShowLocationButton) {
+                if (mUsesGps && mShowLocationButton
+                        && mPowerUsageFeatureProvider.isLocationSettingEnabled(packages)) {
                     addControl(R.string.location_settings_title,
                             R.string.battery_sugg_apps_gps, ACTION_LOCATION_SETTINGS);
                     removeHeader = false;

src/com/android/settings/fuelgauge/PowerUsageFeatureProvider.java

@@ -0,0 +1,27 @@
+/*
+ * Copyright (C) 2016 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.android.settings.fuelgauge;
+
+/**
+ * Feature Provider used in power usage
+ */
+public interface PowerUsageFeatureProvider {
+  /**
+   * Check whether location setting is enabled
+   */
+  boolean isLocationSettingEnabled(String[] packages);
+}