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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.tv.settings.system;
     18 
     19 import android.app.Activity;
     20 import android.app.AlarmManager;
     21 import android.content.BroadcastReceiver;
     22 import android.content.Context;
     23 import android.content.Intent;
     24 import android.content.IntentFilter;
     25 import android.os.Bundle;
     26 import android.support.annotation.Keep;
     27 import android.support.v17.preference.LeanbackPreferenceFragment;
     28 import android.support.v7.preference.CheckBoxPreference;
     29 import android.support.v7.preference.Preference;
     30 import android.support.v7.preference.PreferenceScreen;
     31 import android.text.TextUtils;
     32 
     33 import com.android.settingslib.datetime.ZoneGetter;
     34 import com.android.tv.settings.R;
     35 
     36 import java.util.ArrayList;
     37 import java.util.Collections;
     38 import java.util.Comparator;
     39 import java.util.List;
     40 import java.util.Map;
     41 import java.util.TimeZone;
     42 
     43 @Keep
     44 public class TimeZoneFragment extends LeanbackPreferenceFragment {
     45 
     46     private BroadcastReceiver mIntentReceiver = new BroadcastReceiver() {
     47         @Override
     48         public void onReceive(Context context, Intent intent) {
     49             final Activity activity = getActivity();
     50             if (activity != null) {
     51                 updateZones();
     52             }
     53         }
     54     };
     55 
     56     @Override
     57     public void onCreatePreferences(Bundle savedInstanceState, String rootKey) {
     58         final Context themedContext = getPreferenceManager().getContext();
     59         final PreferenceScreen screen = getPreferenceManager().createPreferenceScreen(
     60                 themedContext);
     61         screen.setTitle(R.string.system_set_time_zone);
     62         setPreferenceScreen(screen);
     63 
     64         final List<Map<String, Object>> zoneList = ZoneGetter.getZonesList(getActivity());
     65         final List<ZonePreference> zonePrefs = new ArrayList<>(zoneList.size());
     66         for (final Map<String, Object> zone : zoneList) {
     67             zonePrefs.add(new ZonePreference(themedContext, zone));
     68         }
     69         Collections.sort(zonePrefs, new ZonePrefComparator());
     70         for (final Preference zonePref : zonePrefs) {
     71             screen.addPreference(zonePref);
     72         }
     73     }
     74 
     75     @Override
     76     public void onResume() {
     77         super.onResume();
     78         // Register for zone changes
     79         IntentFilter filter = new IntentFilter();
     80         filter.addAction(Intent.ACTION_TIMEZONE_CHANGED);
     81         getActivity().registerReceiver(mIntentReceiver, filter, null, null);
     82         updateZones();
     83     }
     84 
     85     @Override
     86     public void onPause() {
     87         super.onPause();
     88         getActivity().unregisterReceiver(mIntentReceiver);
     89     }
     90 
     91     @Override
     92     public boolean onPreferenceTreeClick(Preference preference) {
     93         if (preference instanceof ZonePreference) {
     94             // Update the system timezone value
     95             final AlarmManager alarm = (AlarmManager)
     96                     getActivity().getSystemService(Context.ALARM_SERVICE);
     97             alarm.setTimeZone(preference.getKey());
     98             if (!getFragmentManager().popBackStackImmediate()) {
     99                 getActivity().finish();
    100             }
    101         }
    102         return super.onPreferenceTreeClick(preference);
    103     }
    104 
    105     private void updateZones() {
    106         final String id = TimeZone.getDefault().getID();
    107         final PreferenceScreen screen = getPreferenceScreen();
    108         final int count = screen.getPreferenceCount();
    109         for (int i = 0; i < count; i++) {
    110             final Preference pref = screen.getPreference(i);
    111             if (!(pref instanceof ZonePreference)) {
    112                 continue;
    113             }
    114             final ZonePreference zonePref = (ZonePreference) pref;
    115             zonePref.setChecked(TextUtils.equals(zonePref.getKey(), id));
    116         }
    117     }
    118 
    119     private static class ZonePreference extends CheckBoxPreference {
    120         Integer offset;
    121 
    122         public ZonePreference(Context context, Map<? extends String, ?> zone) {
    123             super(context);
    124             setWidgetLayoutResource(R.layout.radio_preference_widget);
    125             setKey((String) zone.get(ZoneGetter.KEY_ID));
    126             setPersistent(false);
    127             setTitle((String) zone.get(ZoneGetter.KEY_DISPLAYNAME));
    128             setSummary((String) zone.get(ZoneGetter.KEY_GMT));
    129             offset = (Integer) zone.get(ZoneGetter.KEY_OFFSET);
    130         }
    131     }
    132 
    133     private static class ZonePrefComparator implements Comparator<ZonePreference> {
    134         public int compare(ZonePreference zone1, ZonePreference zone2) {
    135             final int firstResult = zone1.offset.compareTo(zone2.offset);
    136             if (firstResult != 0) {
    137                 return firstResult;
    138             }
    139             return zone1.getTitle().toString().compareTo(zone2.getTitle().toString());
    140         }
    141     }
    142 
    143 }
    144