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      1 /*
      2  * Copyright (C) 2015 The Android Open Source Project
      3  *
      4  * Licensed under the Apache License, Version 2.0 (the "License");
      5  * you may not use this file except in compliance with the License.
      6  * You may obtain a copy of the License at
      7  *
      8  *      http://www.apache.org/licenses/LICENSE-2.0
      9  *
     10  * Unless required by applicable law or agreed to in writing, software
     11  * distributed under the License is distributed on an "AS IS" BASIS,
     12  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
     13  * See the License for the specific language governing permissions and
     14  * limitations under the License.
     15  */
     16 
     17 package com.android.settings.location;
     18 
     19 import android.provider.Settings.Global;
     20 import android.support.v14.preference.SwitchPreference;
     21 import android.support.v7.preference.Preference;
     22 import android.support.v7.preference.PreferenceScreen;
     23 
     24 import com.android.internal.logging.nano.MetricsProto.MetricsEvent;
     25 import com.android.settings.R;
     26 import com.android.settings.SettingsPreferenceFragment;
     27 
     28 /**
     29  * A page that configures the background scanning settings for Wi-Fi and Bluetooth.
     30  */
     31 public class ScanningSettings extends SettingsPreferenceFragment {
     32     private static final String KEY_WIFI_SCAN_ALWAYS_AVAILABLE = "wifi_always_scanning";
     33     private static final String KEY_BLUETOOTH_SCAN_ALWAYS_AVAILABLE = "bluetooth_always_scanning";
     34 
     35     @Override
     36     public int getMetricsCategory() {
     37         return MetricsEvent.LOCATION_SCANNING;
     38     }
     39 
     40     @Override
     41     public void onResume() {
     42         super.onResume();
     43         createPreferenceHierarchy();
     44     }
     45 
     46     private PreferenceScreen createPreferenceHierarchy() {
     47         PreferenceScreen root = getPreferenceScreen();
     48         if (root != null) {
     49             root.removeAll();
     50         }
     51         addPreferencesFromResource(R.xml.location_scanning);
     52         root = getPreferenceScreen();
     53         initPreferences();
     54         return root;
     55     }
     56 
     57     private void initPreferences() {
     58         final SwitchPreference wifiScanAlwaysAvailable =
     59             (SwitchPreference) findPreference(KEY_WIFI_SCAN_ALWAYS_AVAILABLE);
     60         wifiScanAlwaysAvailable.setChecked(Global.getInt(getContentResolver(),
     61                     Global.WIFI_SCAN_ALWAYS_AVAILABLE, 0) == 1);
     62         final SwitchPreference bleScanAlwaysAvailable =
     63             (SwitchPreference) findPreference(KEY_BLUETOOTH_SCAN_ALWAYS_AVAILABLE);
     64         bleScanAlwaysAvailable.setChecked(Global.getInt(getContentResolver(),
     65                     Global.BLE_SCAN_ALWAYS_AVAILABLE, 0) == 1);
     66     }
     67 
     68     @Override
     69     public boolean onPreferenceTreeClick(Preference preference) {
     70         String key = preference.getKey();
     71         if (KEY_WIFI_SCAN_ALWAYS_AVAILABLE.equals(key)) {
     72             Global.putInt(getContentResolver(),
     73                     Global.WIFI_SCAN_ALWAYS_AVAILABLE,
     74                     ((SwitchPreference) preference).isChecked() ? 1 : 0);
     75         } else if (KEY_BLUETOOTH_SCAN_ALWAYS_AVAILABLE.equals(key)) {
     76             Global.putInt(getContentResolver(),
     77                     Global.BLE_SCAN_ALWAYS_AVAILABLE,
     78                     ((SwitchPreference) preference).isChecked() ? 1 : 0);
     79         } else {
     80             return super.onPreferenceTreeClick(preference);
     81         }
     82         return true;
     83     }
     84 }
     85