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      1 /*
      2  * Copyright (C) 2017 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 package com.android.settings.location;
     17 
     18 import android.content.BroadcastReceiver;
     19 import android.content.Context;
     20 import android.content.Intent;
     21 import android.content.IntentFilter;
     22 import android.location.LocationManager;
     23 import android.provider.Settings.Secure;
     24 import android.support.annotation.VisibleForTesting;
     25 import android.support.v7.preference.Preference;
     26 import android.support.v7.preference.PreferenceScreen;
     27 import com.android.settings.R;
     28 import com.android.settings.core.PreferenceControllerMixin;
     29 import com.android.settingslib.core.AbstractPreferenceController;
     30 import com.android.settings.search.DatabaseIndexingUtils;
     31 import com.android.settings.search.InlineListPayload;
     32 import com.android.settings.search.ResultPayload;
     33 import com.android.settingslib.core.lifecycle.Lifecycle;
     34 import com.android.settingslib.core.lifecycle.LifecycleObserver;
     35 import com.android.settingslib.core.lifecycle.events.OnPause;
     36 import com.android.settingslib.core.lifecycle.events.OnResume;
     37 
     38 public class LocationPreferenceController extends AbstractPreferenceController
     39         implements PreferenceControllerMixin, LifecycleObserver, OnResume, OnPause {
     40 
     41     private static final String KEY_LOCATION = "location";
     42     private Context mContext;
     43     private Preference mPreference;
     44 
     45     @VisibleForTesting
     46     BroadcastReceiver mLocationProvidersChangedReceiver;
     47 
     48     public LocationPreferenceController(Context context, Lifecycle lifecycle) {
     49         super(context);
     50         mContext = context;
     51         mLocationProvidersChangedReceiver = new BroadcastReceiver() {
     52             @Override
     53             public void onReceive(Context context, Intent intent) {
     54                 if (intent.getAction().equals(LocationManager.PROVIDERS_CHANGED_ACTION)) {
     55                     updateSummary();
     56                 }
     57             }
     58         };
     59         if (lifecycle != null) {
     60             lifecycle.addObserver(this);
     61         }
     62     }
     63 
     64     @Override
     65     public void displayPreference(PreferenceScreen screen) {
     66         super.displayPreference(screen);
     67         mPreference = screen.findPreference(KEY_LOCATION);
     68     }
     69 
     70     @Override
     71     public void onResume() {
     72         if (mLocationProvidersChangedReceiver != null) {
     73             mContext.registerReceiver(mLocationProvidersChangedReceiver, new IntentFilter(
     74                     LocationManager.PROVIDERS_CHANGED_ACTION));
     75         }
     76     }
     77 
     78     @Override
     79     public void onPause() {
     80         if (mLocationProvidersChangedReceiver != null) {
     81             mContext.unregisterReceiver(mLocationProvidersChangedReceiver);
     82         }
     83     }
     84 
     85     @Override
     86     public void updateState(Preference preference) {
     87         preference.setSummary(getLocationSummary(mContext));
     88     }
     89 
     90     @Override
     91     public String getPreferenceKey() {
     92         return KEY_LOCATION;
     93     }
     94 
     95     @Override
     96     public boolean isAvailable() {
     97         return true;
     98     }
     99 
    100     public void updateSummary() {
    101         updateState(mPreference);
    102     }
    103 
    104     public static String getLocationSummary(Context context) {
    105         int mode = Secure.getInt(context.getContentResolver(),
    106                 Secure.LOCATION_MODE, Secure.LOCATION_MODE_OFF);
    107         if (mode != Secure.LOCATION_MODE_OFF) {
    108             return context.getString(R.string.location_on_summary,
    109                     context.getString(getLocationString(mode)));
    110         }
    111         return context.getString(R.string.location_off_summary);
    112     }
    113 
    114     public static int getLocationString(int mode) {
    115         switch (mode) {
    116             case Secure.LOCATION_MODE_OFF:
    117                 return R.string.location_mode_location_off_title;
    118             case Secure.LOCATION_MODE_SENSORS_ONLY:
    119                 return R.string.location_mode_sensors_only_title;
    120             case Secure.LOCATION_MODE_BATTERY_SAVING:
    121                 return R.string.location_mode_battery_saving_title;
    122             case Secure.LOCATION_MODE_HIGH_ACCURACY:
    123                 return R.string.location_mode_high_accuracy_title;
    124         }
    125         return 0;
    126     }
    127 
    128     @Override
    129     public ResultPayload getResultPayload() {
    130         final Intent intent = DatabaseIndexingUtils.buildSubsettingIntent(mContext,
    131                 LocationSettings.class.getName(), KEY_LOCATION,
    132                 mContext.getString(R.string.location_settings_title));
    133 
    134         return new InlineListPayload(Secure.LOCATION_MODE,
    135                 ResultPayload.SettingsSource.SECURE, intent, isAvailable(),
    136                 Secure.LOCATION_MODE_HIGH_ACCURACY + 1, Secure.LOCATION_MODE_OFF);
    137     }
    138 }
    139