1 /* 2 * Copyright (C) 2016 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.datetime; 18 19 import android.content.Context; 20 import android.content.Intent; 21 import android.provider.Settings; 22 import android.support.v14.preference.SwitchPreference; 23 import android.support.v7.preference.Preference; 24 import android.support.v7.preference.TwoStatePreference; 25 import android.text.TextUtils; 26 import android.text.format.DateFormat; 27 28 import com.android.settings.core.PreferenceController; 29 30 import java.util.Calendar; 31 import java.util.Date; 32 33 public class TimeFormatPreferenceController extends PreferenceController { 34 35 static final String HOURS_12 = "12"; 36 static final String HOURS_24 = "24"; 37 38 private static final String KEY_TIME_FORMAT = "24 hour"; 39 40 // Used for showing the current date format, which looks like "12/31/2010", "2010/12/13", etc. 41 // The date value is dummy (independent of actual date). 42 private final Calendar mDummyDate; 43 private final boolean mIsFromSUW; 44 private final UpdateTimeAndDateCallback mUpdateTimeAndDateCallback; 45 TimeFormatPreferenceController(Context context, UpdateTimeAndDateCallback callback, boolean isFromSUW)46 public TimeFormatPreferenceController(Context context, UpdateTimeAndDateCallback callback, 47 boolean isFromSUW) { 48 super(context); 49 mIsFromSUW = isFromSUW; 50 mDummyDate = Calendar.getInstance(); 51 mUpdateTimeAndDateCallback = callback; 52 } 53 54 @Override isAvailable()55 public boolean isAvailable() { 56 return !mIsFromSUW; 57 } 58 59 @Override updateState(Preference preference)60 public void updateState(Preference preference) { 61 if (!(preference instanceof TwoStatePreference)) { 62 return; 63 } 64 ((TwoStatePreference) preference).setChecked(is24Hour()); 65 final Calendar now = Calendar.getInstance(); 66 mDummyDate.setTimeZone(now.getTimeZone()); 67 // We use December 31st because it's unambiguous when demonstrating the date format. 68 // We use 13:00 so we can demonstrate the 12/24 hour options. 69 mDummyDate.set(now.get(Calendar.YEAR), 11, 31, 13, 0, 0); 70 final Date dummyDate = mDummyDate.getTime(); 71 preference.setSummary(DateFormat.getTimeFormat(mContext).format(dummyDate)); 72 } 73 74 @Override handlePreferenceTreeClick(Preference preference)75 public boolean handlePreferenceTreeClick(Preference preference) { 76 if (!(preference instanceof TwoStatePreference) 77 || !TextUtils.equals(KEY_TIME_FORMAT, preference.getKey())) { 78 return false; 79 } 80 final boolean is24Hour = ((SwitchPreference) preference).isChecked(); 81 set24Hour(is24Hour); 82 timeUpdated(is24Hour); 83 mUpdateTimeAndDateCallback.updateTimeAndDateDisplay(mContext); 84 return true; 85 } 86 87 @Override getPreferenceKey()88 public String getPreferenceKey() { 89 return KEY_TIME_FORMAT; 90 } 91 is24Hour()92 private boolean is24Hour() { 93 return DateFormat.is24HourFormat(mContext); 94 } 95 timeUpdated(boolean is24Hour)96 private void timeUpdated(boolean is24Hour) { 97 Intent timeChanged = new Intent(Intent.ACTION_TIME_CHANGED); 98 int timeFormatPreference = 99 is24Hour ? Intent.EXTRA_TIME_PREF_VALUE_USE_24_HOUR 100 : Intent.EXTRA_TIME_PREF_VALUE_USE_12_HOUR; 101 timeChanged.putExtra(Intent.EXTRA_TIME_PREF_24_HOUR_FORMAT, timeFormatPreference); 102 mContext.sendBroadcast(timeChanged); 103 } 104 set24Hour(boolean is24Hour)105 private void set24Hour(boolean is24Hour) { 106 Settings.System.putString(mContext.getContentResolver(), 107 Settings.System.TIME_12_24, 108 is24Hour ? HOURS_24 : HOURS_12); 109 } 110 } 111