1 /* 2 * Copyright (C) 2008 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; 18 19 import android.app.Dialog; 20 import android.app.DatePickerDialog; 21 import android.app.TimePickerDialog; 22 import android.content.BroadcastReceiver; 23 import android.content.Context; 24 import android.content.Intent; 25 import android.content.IntentFilter; 26 import android.content.SharedPreferences; 27 import android.content.SharedPreferences.OnSharedPreferenceChangeListener; 28 import android.os.Bundle; 29 import android.os.SystemClock; 30 import android.preference.CheckBoxPreference; 31 import android.preference.ListPreference; 32 import android.preference.Preference; 33 import android.preference.PreferenceActivity; 34 import android.preference.PreferenceScreen; 35 import android.provider.Settings; 36 import android.provider.Settings.SettingNotFoundException; 37 import android.text.format.DateFormat; 38 import android.widget.DatePicker; 39 import android.widget.TimePicker; 40 41 import java.util.Calendar; 42 import java.util.Date; 43 import java.util.TimeZone; 44 45 public class DateTimeSettings 46 extends PreferenceActivity 47 implements OnSharedPreferenceChangeListener, 48 TimePickerDialog.OnTimeSetListener , DatePickerDialog.OnDateSetListener { 49 50 private static final String HOURS_12 = "12"; 51 private static final String HOURS_24 = "24"; 52 53 private Calendar mDummyDate; 54 private static final String KEY_DATE_FORMAT = "date_format"; 55 private static final String KEY_AUTO_TIME = "auto_time"; 56 57 private static final int DIALOG_DATEPICKER = 0; 58 private static final int DIALOG_TIMEPICKER = 1; 59 60 private CheckBoxPreference mAutoPref; 61 private Preference mTimePref; 62 private Preference mTime24Pref; 63 private Preference mTimeZone; 64 private Preference mDatePref; 65 private ListPreference mDateFormat; 66 67 @Override onCreate(Bundle icicle)68 protected void onCreate(Bundle icicle) { 69 super.onCreate(icicle); 70 71 addPreferencesFromResource(R.xml.date_time_prefs); 72 73 initUI(); 74 } 75 initUI()76 private void initUI() { 77 boolean autoEnabled = getAutoState(); 78 79 mDummyDate = Calendar.getInstance(); 80 mDummyDate.set(mDummyDate.get(Calendar.YEAR), 11, 31, 13, 0, 0); 81 82 mAutoPref = (CheckBoxPreference) findPreference(KEY_AUTO_TIME); 83 mAutoPref.setChecked(autoEnabled); 84 mTimePref = findPreference("time"); 85 mTime24Pref = findPreference("24 hour"); 86 mTimeZone = findPreference("timezone"); 87 mDatePref = findPreference("date"); 88 mDateFormat = (ListPreference) findPreference(KEY_DATE_FORMAT); 89 90 String [] dateFormats = getResources().getStringArray(R.array.date_format_values); 91 String [] formattedDates = new String[dateFormats.length]; 92 String currentFormat = getDateFormat(); 93 // Initialize if DATE_FORMAT is not set in the system settings 94 // This can happen after a factory reset (or data wipe) 95 if (currentFormat == null) { 96 currentFormat = ""; 97 } 98 for (int i = 0; i < formattedDates.length; i++) { 99 String formatted = 100 DateFormat.getDateFormatForSetting(this, dateFormats[i]). 101 format(mDummyDate.getTime()); 102 103 if (dateFormats[i].length() == 0) { 104 formattedDates[i] = getResources(). 105 getString(R.string.normal_date_format, formatted); 106 } else { 107 formattedDates[i] = formatted; 108 } 109 } 110 111 mDateFormat.setEntries(formattedDates); 112 mDateFormat.setEntryValues(R.array.date_format_values); 113 mDateFormat.setValue(currentFormat); 114 115 mTimePref.setEnabled(!autoEnabled); 116 mDatePref.setEnabled(!autoEnabled); 117 mTimeZone.setEnabled(!autoEnabled); 118 } 119 120 121 @Override onResume()122 protected void onResume() { 123 super.onResume(); 124 125 getPreferenceScreen().getSharedPreferences().registerOnSharedPreferenceChangeListener(this); 126 127 ((CheckBoxPreference)mTime24Pref).setChecked(is24Hour()); 128 129 // Register for time ticks and other reasons for time change 130 IntentFilter filter = new IntentFilter(); 131 filter.addAction(Intent.ACTION_TIME_TICK); 132 filter.addAction(Intent.ACTION_TIME_CHANGED); 133 filter.addAction(Intent.ACTION_TIMEZONE_CHANGED); 134 registerReceiver(mIntentReceiver, filter, null, null); 135 136 updateTimeAndDateDisplay(); 137 } 138 139 @Override onPause()140 protected void onPause() { 141 super.onPause(); 142 unregisterReceiver(mIntentReceiver); 143 getPreferenceScreen().getSharedPreferences().unregisterOnSharedPreferenceChangeListener(this); 144 } 145 updateTimeAndDateDisplay()146 private void updateTimeAndDateDisplay() { 147 java.text.DateFormat shortDateFormat = DateFormat.getDateFormat(this); 148 Date now = Calendar.getInstance().getTime(); 149 Date dummyDate = mDummyDate.getTime(); 150 mTimePref.setSummary(DateFormat.getTimeFormat(this).format(now)); 151 mTimeZone.setSummary(getTimeZoneText()); 152 mDatePref.setSummary(shortDateFormat.format(now)); 153 mDateFormat.setSummary(shortDateFormat.format(dummyDate)); 154 } 155 onDateSet(DatePicker view, int year, int month, int day)156 public void onDateSet(DatePicker view, int year, int month, int day) { 157 Calendar c = Calendar.getInstance(); 158 159 c.set(Calendar.YEAR, year); 160 c.set(Calendar.MONTH, month); 161 c.set(Calendar.DAY_OF_MONTH, day); 162 long when = c.getTimeInMillis(); 163 164 if (when / 1000 < Integer.MAX_VALUE) { 165 SystemClock.setCurrentTimeMillis(when); 166 } 167 updateTimeAndDateDisplay(); 168 } 169 onTimeSet(TimePicker view, int hourOfDay, int minute)170 public void onTimeSet(TimePicker view, int hourOfDay, int minute) { 171 Calendar c = Calendar.getInstance(); 172 173 c.set(Calendar.HOUR_OF_DAY, hourOfDay); 174 c.set(Calendar.MINUTE, minute); 175 long when = c.getTimeInMillis(); 176 177 if (when / 1000 < Integer.MAX_VALUE) { 178 SystemClock.setCurrentTimeMillis(when); 179 } 180 updateTimeAndDateDisplay(); 181 182 // We don't need to call timeUpdated() here because the TIME_CHANGED 183 // broadcast is sent by the AlarmManager as a side effect of setting the 184 // SystemClock time. 185 } 186 onSharedPreferenceChanged(SharedPreferences preferences, String key)187 public void onSharedPreferenceChanged(SharedPreferences preferences, String key) { 188 if (key.equals(KEY_DATE_FORMAT)) { 189 String format = preferences.getString(key, 190 getResources().getString(R.string.default_date_format)); 191 Settings.System.putString(getContentResolver(), 192 Settings.System.DATE_FORMAT, format); 193 updateTimeAndDateDisplay(); 194 } else if (key.equals(KEY_AUTO_TIME)) { 195 boolean autoEnabled = preferences.getBoolean(key, true); 196 Settings.System.putInt(getContentResolver(), 197 Settings.System.AUTO_TIME, 198 autoEnabled ? 1 : 0); 199 mTimePref.setEnabled(!autoEnabled); 200 mDatePref.setEnabled(!autoEnabled); 201 mTimeZone.setEnabled(!autoEnabled); 202 } 203 } 204 205 @Override onCreateDialog(int id)206 public Dialog onCreateDialog(int id) { 207 Dialog d; 208 209 switch (id) { 210 case DIALOG_DATEPICKER: { 211 final Calendar calendar = Calendar.getInstance(); 212 d = new DatePickerDialog( 213 this, 214 this, 215 calendar.get(Calendar.YEAR), 216 calendar.get(Calendar.MONTH), 217 calendar.get(Calendar.DAY_OF_MONTH)); 218 d.setTitle(getResources().getString(R.string.date_time_changeDate_text)); 219 break; 220 } 221 case DIALOG_TIMEPICKER: { 222 final Calendar calendar = Calendar.getInstance(); 223 d = new TimePickerDialog( 224 this, 225 this, 226 calendar.get(Calendar.HOUR_OF_DAY), 227 calendar.get(Calendar.MINUTE), 228 DateFormat.is24HourFormat(this)); 229 d.setTitle(getResources().getString(R.string.date_time_changeTime_text)); 230 break; 231 } 232 default: 233 d = null; 234 break; 235 } 236 237 return d; 238 } 239 240 @Override onPrepareDialog(int id, Dialog d)241 public void onPrepareDialog(int id, Dialog d) { 242 switch (id) { 243 case DIALOG_DATEPICKER: { 244 DatePickerDialog datePicker = (DatePickerDialog)d; 245 final Calendar calendar = Calendar.getInstance(); 246 datePicker.updateDate( 247 calendar.get(Calendar.YEAR), 248 calendar.get(Calendar.MONTH), 249 calendar.get(Calendar.DAY_OF_MONTH)); 250 break; 251 } 252 case DIALOG_TIMEPICKER: { 253 TimePickerDialog timePicker = (TimePickerDialog)d; 254 final Calendar calendar = Calendar.getInstance(); 255 timePicker.updateTime( 256 calendar.get(Calendar.HOUR_OF_DAY), 257 calendar.get(Calendar.MINUTE)); 258 break; 259 } 260 default: 261 break; 262 } 263 } 264 265 @Override onPreferenceTreeClick(PreferenceScreen preferenceScreen, Preference preference)266 public boolean onPreferenceTreeClick(PreferenceScreen preferenceScreen, Preference preference) { 267 if (preference == mDatePref) { 268 showDialog(DIALOG_DATEPICKER); 269 } else if (preference == mTimePref) { 270 // The 24-hour mode may have changed, so recreate the dialog 271 removeDialog(DIALOG_TIMEPICKER); 272 showDialog(DIALOG_TIMEPICKER); 273 } else if (preference == mTime24Pref) { 274 set24Hour(((CheckBoxPreference)mTime24Pref).isChecked()); 275 updateTimeAndDateDisplay(); 276 timeUpdated(); 277 } else if (preference == mTimeZone) { 278 Intent intent = new Intent(); 279 intent.setClass(this, ZoneList.class); 280 startActivityForResult(intent, 0); 281 } 282 return false; 283 } 284 285 @Override onActivityResult(int requestCode, int resultCode, Intent data)286 protected void onActivityResult(int requestCode, int resultCode, 287 Intent data) { 288 updateTimeAndDateDisplay(); 289 } 290 timeUpdated()291 private void timeUpdated() { 292 Intent timeChanged = new Intent(Intent.ACTION_TIME_CHANGED); 293 sendBroadcast(timeChanged); 294 } 295 296 /* Get & Set values from the system settings */ 297 is24Hour()298 private boolean is24Hour() { 299 return DateFormat.is24HourFormat(this); 300 } 301 set24Hour(boolean is24Hour)302 private void set24Hour(boolean is24Hour) { 303 Settings.System.putString(getContentResolver(), 304 Settings.System.TIME_12_24, 305 is24Hour? HOURS_24 : HOURS_12); 306 } 307 getDateFormat()308 private String getDateFormat() { 309 return Settings.System.getString(getContentResolver(), 310 Settings.System.DATE_FORMAT); 311 } 312 getAutoState()313 private boolean getAutoState() { 314 try { 315 return Settings.System.getInt(getContentResolver(), 316 Settings.System.AUTO_TIME) > 0; 317 } catch (SettingNotFoundException snfe) { 318 return true; 319 } 320 } 321 setDateFormat(String format)322 private void setDateFormat(String format) { 323 if (format.length() == 0) { 324 format = null; 325 } 326 327 Settings.System.putString(getContentResolver(), Settings.System.DATE_FORMAT, format); 328 } 329 330 /* Helper routines to format timezone */ 331 getTimeZoneText()332 private String getTimeZoneText() { 333 TimeZone tz = java.util.Calendar.getInstance().getTimeZone(); 334 boolean daylight = tz.inDaylightTime(new Date()); 335 StringBuilder sb = new StringBuilder(); 336 337 sb.append(formatOffset(tz.getRawOffset() + 338 (daylight ? tz.getDSTSavings() : 0))). 339 append(", "). 340 append(tz.getDisplayName(daylight, TimeZone.LONG)); 341 342 return sb.toString(); 343 } 344 formatOffset(int off)345 private char[] formatOffset(int off) { 346 off = off / 1000 / 60; 347 348 char[] buf = new char[9]; 349 buf[0] = 'G'; 350 buf[1] = 'M'; 351 buf[2] = 'T'; 352 353 if (off < 0) { 354 buf[3] = '-'; 355 off = -off; 356 } else { 357 buf[3] = '+'; 358 } 359 360 int hours = off / 60; 361 int minutes = off % 60; 362 363 buf[4] = (char) ('0' + hours / 10); 364 buf[5] = (char) ('0' + hours % 10); 365 366 buf[6] = ':'; 367 368 buf[7] = (char) ('0' + minutes / 10); 369 buf[8] = (char) ('0' + minutes % 10); 370 371 return buf; 372 } 373 374 private BroadcastReceiver mIntentReceiver = new BroadcastReceiver() { 375 @Override 376 public void onReceive(Context context, Intent intent) { 377 updateTimeAndDateDisplay(); 378 } 379 }; 380 } 381