DeskClock.java revision 91d3f291efe9d090dd7fe003955d9da2dec18a74
1/* 2 * Copyright (C) 2009 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 17package com.android.deskclock; 18 19import static android.os.BatteryManager.BATTERY_STATUS_UNKNOWN; 20 21import android.app.Activity; 22import android.app.AlarmManager; 23import android.app.PendingIntent; 24import android.app.UiModeManager; 25import android.content.BroadcastReceiver; 26import android.content.Context; 27import android.content.Intent; 28import android.content.IntentFilter; 29import android.content.pm.PackageManager; 30import android.content.res.Configuration; 31import android.content.res.Resources; 32import android.database.ContentObserver; 33import android.database.Cursor; 34import android.graphics.Rect; 35import android.graphics.drawable.Drawable; 36import android.net.Uri; 37import android.os.BatteryManager; 38import android.os.Bundle; 39import android.os.Handler; 40import android.os.Message; 41import android.provider.MediaStore; 42import android.provider.Settings; 43import android.text.TextUtils; 44import android.text.format.DateFormat; 45import android.util.DisplayMetrics; 46import android.util.Log; 47import android.view.Menu; 48import android.view.MenuInflater; 49import android.view.MenuItem; 50import android.view.MotionEvent; 51import android.view.View; 52import android.view.ViewGroup; 53import android.view.ViewTreeObserver; 54import android.view.Window; 55import android.view.WindowManager; 56import android.view.animation.AnimationUtils; 57import android.widget.AbsoluteLayout; 58import android.widget.ImageButton; 59import android.widget.ImageView; 60import android.widget.TextView; 61 62import java.util.Calendar; 63import java.util.Date; 64import java.util.Random; 65 66/** 67 * DeskClock clock view for desk docks. 68 */ 69public class DeskClock extends Activity { 70 private static final boolean DEBUG = false; 71 72 private static final String LOG_TAG = "DeskClock"; 73 74 // Alarm action for midnight (so we can update the date display). 75 private static final String ACTION_MIDNIGHT = "com.android.deskclock.MIDNIGHT"; 76 77 // Intent to broadcast for dock settings. 78 private static final String DOCK_SETTINGS_ACTION = "com.android.settings.DOCK_SETTINGS"; 79 80 // Delay before engaging the burn-in protection mode (green-on-black). 81 private final long SCREEN_SAVER_TIMEOUT = 5 * 60 * 1000; // 5 min 82 83 // Repositioning delay in screen saver. 84 public static final long SCREEN_SAVER_MOVE_DELAY = 60 * 1000; // 1 min 85 86 // Color to use for text & graphics in screen saver mode. 87 private final int SCREEN_SAVER_COLOR = 0xFF308030; 88 private final int SCREEN_SAVER_COLOR_DIM = 0xFF183018; 89 90 // Opacity of black layer between clock display and wallpaper. 91 private final float DIM_BEHIND_AMOUNT_NORMAL = 0.4f; 92 private final float DIM_BEHIND_AMOUNT_DIMMED = 0.8f; // higher contrast when display dimmed 93 94 private final int SCREEN_SAVER_TIMEOUT_MSG = 0x2000; 95 private final int SCREEN_SAVER_MOVE_MSG = 0x2001; 96 97 // State variables follow. 98 private DigitalClock mTime; 99 private TextView mDate; 100 101 private TextView mNextAlarm = null; 102 private TextView mBatteryDisplay; 103 104 private boolean mDimmed = false; 105 private boolean mScreenSaverMode = false; 106 107 private String mDateFormat; 108 109 private int mBatteryLevel = -1; 110 private boolean mPluggedIn = false; 111 112 private boolean mLaunchedFromDock = false; 113 114 private Random mRNG; 115 116 private PendingIntent mMidnightIntent; 117 118 private final BroadcastReceiver mIntentReceiver = new BroadcastReceiver() { 119 @Override 120 public void onReceive(Context context, Intent intent) { 121 final String action = intent.getAction(); 122 if (DEBUG) Log.d(LOG_TAG, "mIntentReceiver.onReceive: action=" + action + ", intent=" + intent); 123 if (Intent.ACTION_DATE_CHANGED.equals(action) || ACTION_MIDNIGHT.equals(action)) { 124 refreshDate(); 125 } else if (Intent.ACTION_BATTERY_CHANGED.equals(action)) { 126 handleBatteryUpdate( 127 intent.getIntExtra(BatteryManager.EXTRA_PLUGGED, 0), 128 intent.getIntExtra(BatteryManager.EXTRA_STATUS, BATTERY_STATUS_UNKNOWN), 129 intent.getIntExtra(BatteryManager.EXTRA_LEVEL, 0)); 130 } else if (UiModeManager.ACTION_EXIT_DESK_MODE.equals(action)) { 131 if (mLaunchedFromDock) { 132 // moveTaskToBack(false); 133 finish(); 134 } 135 mLaunchedFromDock = false; 136 } else if (Intent.ACTION_DOCK_EVENT.equals(action)) { 137 if (DEBUG) Log.d(LOG_TAG, "dock event extra " 138 + intent.getExtras().getInt(Intent.EXTRA_DOCK_STATE)); 139 if (mLaunchedFromDock && intent.getExtras().getInt(Intent.EXTRA_DOCK_STATE, 140 Intent.EXTRA_DOCK_STATE_UNDOCKED) == Intent.EXTRA_DOCK_STATE_UNDOCKED) { 141 finish(); 142 mLaunchedFromDock = false; 143 } 144 } 145 } 146 }; 147 148 public static class DeskClockReceiver extends BroadcastReceiver { 149 @Override 150 public void onReceive(Context context, Intent intent) { 151 if (Intent.ACTION_DOCK_EVENT.equals(intent.getAction())) { 152 Bundle extras = intent.getExtras(); 153 int state = extras 154 .getInt(Intent.EXTRA_DOCK_STATE, Intent.EXTRA_DOCK_STATE_UNDOCKED); 155 if (state == Intent.EXTRA_DOCK_STATE_DESK 156 || state == Intent.EXTRA_DOCK_STATE_LE_DESK 157 || state == Intent.EXTRA_DOCK_STATE_HE_DESK) { 158 Intent clockIntent = new Intent(); 159 clockIntent.setClass(context, DeskClock.class); 160 clockIntent.addCategory(Intent.CATEGORY_DESK_DOCK); 161 clockIntent.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK); 162 context.startActivity(clockIntent); 163 } 164 } 165 } 166 167 } 168 169 private final Handler mHandy = new Handler() { 170 @Override 171 public void handleMessage(Message m) { 172 if (m.what == SCREEN_SAVER_TIMEOUT_MSG) { 173 saveScreen(); 174 } else if (m.what == SCREEN_SAVER_MOVE_MSG) { 175 moveScreenSaver(); 176 } 177 } 178 }; 179 180 private View mAlarmButton; 181 182 183 private void moveScreenSaver() { 184 moveScreenSaverTo(-1,-1); 185 } 186 private void moveScreenSaverTo(int x, int y) { 187 if (!mScreenSaverMode) return; 188 189 final View saver_view = findViewById(R.id.saver_view); 190 191 DisplayMetrics metrics = new DisplayMetrics(); 192 getWindowManager().getDefaultDisplay().getMetrics(metrics); 193 194 if (x < 0 || y < 0) { 195 int myWidth = saver_view.getMeasuredWidth(); 196 int myHeight = saver_view.getMeasuredHeight(); 197 x = (int)(mRNG.nextFloat()*(metrics.widthPixels - myWidth)); 198 y = (int)(mRNG.nextFloat()*(metrics.heightPixels - myHeight)); 199 } 200 201 if (DEBUG) Log.d(LOG_TAG, String.format("screen saver: %d: jumping to (%d,%d)", 202 System.currentTimeMillis(), x, y)); 203 204 saver_view.setLayoutParams(new AbsoluteLayout.LayoutParams( 205 ViewGroup.LayoutParams.WRAP_CONTENT, 206 ViewGroup.LayoutParams.WRAP_CONTENT, 207 x, 208 y)); 209 210 // Synchronize our jumping so that it happens exactly on the second. 211 mHandy.sendEmptyMessageDelayed(SCREEN_SAVER_MOVE_MSG, 212 SCREEN_SAVER_MOVE_DELAY + 213 (1000 - (System.currentTimeMillis() % 1000))); 214 } 215 216 private void setWakeLock(boolean hold) { 217 if (DEBUG) Log.d(LOG_TAG, (hold ? "hold" : " releas") + "ing wake lock"); 218 Window win = getWindow(); 219 WindowManager.LayoutParams winParams = win.getAttributes(); 220 winParams.flags |= (WindowManager.LayoutParams.FLAG_DISMISS_KEYGUARD 221 | WindowManager.LayoutParams.FLAG_SHOW_WHEN_LOCKED 222 | WindowManager.LayoutParams.FLAG_ALLOW_LOCK_WHILE_SCREEN_ON 223 | WindowManager.LayoutParams.FLAG_TURN_SCREEN_ON); 224 if (hold) 225 winParams.flags |= WindowManager.LayoutParams.FLAG_KEEP_SCREEN_ON; 226 else 227 winParams.flags &= (~WindowManager.LayoutParams.FLAG_KEEP_SCREEN_ON); 228 win.setAttributes(winParams); 229 } 230 231 private void scheduleScreenSaver() { 232 if (!getResources().getBoolean(R.bool.config_requiresScreenSaver)) { 233 return; 234 } 235 236 // reschedule screen saver 237 mHandy.removeMessages(SCREEN_SAVER_TIMEOUT_MSG); 238 mHandy.sendMessageDelayed( 239 Message.obtain(mHandy, SCREEN_SAVER_TIMEOUT_MSG), 240 SCREEN_SAVER_TIMEOUT); 241 } 242 243 private void restoreScreen() { 244 if (!mScreenSaverMode) return; 245 if (DEBUG) Log.d(LOG_TAG, "restoreScreen"); 246 mScreenSaverMode = false; 247 248 initViews(); 249 doDim(false); // restores previous dim mode 250 251 scheduleScreenSaver(); 252 253 refreshAll(); 254 } 255 256 // Special screen-saver mode for OLED displays that burn in quickly 257 private void saveScreen() { 258 if (mScreenSaverMode) return; 259 if (DEBUG) Log.d(LOG_TAG, "saveScreen"); 260 261 // quickly stash away the x/y of the current date 262 final View oldTimeDate = findViewById(R.id.time_date); 263 int oldLoc[] = new int[2]; 264 oldTimeDate.getLocationOnScreen(oldLoc); 265 266 mScreenSaverMode = true; 267 Window win = getWindow(); 268 WindowManager.LayoutParams winParams = win.getAttributes(); 269 winParams.flags |= WindowManager.LayoutParams.FLAG_FULLSCREEN; 270 win.setAttributes(winParams); 271 272 // give up any internal focus before we switch layouts 273 final View focused = getCurrentFocus(); 274 if (focused != null) focused.clearFocus(); 275 276 setContentView(R.layout.desk_clock_saver); 277 278 mTime = (DigitalClock) findViewById(R.id.time); 279 mDate = (TextView) findViewById(R.id.date); 280 281 final int color = mDimmed ? SCREEN_SAVER_COLOR_DIM : SCREEN_SAVER_COLOR; 282 283 ((AndroidClockTextView)findViewById(R.id.timeDisplay)).setTextColor(color); 284 ((AndroidClockTextView)findViewById(R.id.am_pm)).setTextColor(color); 285 mDate.setTextColor(color); 286 287 mTime.setSystemUiVisibility(View.STATUS_BAR_HIDDEN); 288 289 mBatteryDisplay = null; 290 291 refreshDate(); 292 refreshAlarm(); 293 294 moveScreenSaverTo(oldLoc[0], oldLoc[1]); 295 } 296 297 @Override 298 public void onUserInteraction() { 299 if (mScreenSaverMode) 300 restoreScreen(); 301 } 302 303 // Adapted from KeyguardUpdateMonitor.java 304 private void handleBatteryUpdate(int plugged, int status, int level) { 305 final boolean pluggedIn = (plugged != 0); 306 if (pluggedIn != mPluggedIn) { 307 setWakeLock(pluggedIn); 308 } 309 if (pluggedIn != mPluggedIn || level != mBatteryLevel) { 310 mBatteryLevel = level; 311 mPluggedIn = pluggedIn; 312 refreshBattery(); 313 } 314 } 315 316 private void refreshBattery() { 317 if (mBatteryDisplay == null) return; 318 319 if (mPluggedIn /* || mBatteryLevel < LOW_BATTERY_THRESHOLD */) { 320 mBatteryDisplay.setCompoundDrawablesWithIntrinsicBounds( 321 0, 0, android.R.drawable.ic_lock_idle_charging, 0); 322 mBatteryDisplay.setText( 323 getString(R.string.battery_charging_level, mBatteryLevel)); 324 mBatteryDisplay.setVisibility(View.VISIBLE); 325 } else { 326 mBatteryDisplay.setVisibility(View.INVISIBLE); 327 } 328 } 329 330 private void refreshDate() { 331 final Date now = new Date(); 332 if (DEBUG) Log.d(LOG_TAG, "refreshing date..." + now); 333 mDate.setText(DateFormat.format(mDateFormat, now)); 334 } 335 336 private void refreshAlarm() { 337 if (mNextAlarm == null) return; 338 339 String nextAlarm = Settings.System.getString(getContentResolver(), 340 Settings.System.NEXT_ALARM_FORMATTED); 341 if (!TextUtils.isEmpty(nextAlarm)) { 342 mNextAlarm.setText(getString(R.string.control_set_alarm_with_existing, nextAlarm)); 343 mNextAlarm.setVisibility(View.VISIBLE); 344 } else if (mAlarmButton != null) { 345 mNextAlarm.setVisibility(View.INVISIBLE); 346 } else { 347 mNextAlarm.setText(R.string.control_set_alarm); 348 mNextAlarm.setVisibility(View.VISIBLE); 349 } 350 } 351 352 private void refreshAll() { 353 refreshDate(); 354 refreshAlarm(); 355 refreshBattery(); 356 } 357 358 private void doDim(boolean fade) { 359 View tintView = findViewById(R.id.window_tint); 360 if (tintView == null) return; 361 362 mTime.setSystemUiVisibility(fade ? View.STATUS_BAR_HIDDEN : View.STATUS_BAR_VISIBLE); 363 364 Window win = getWindow(); 365 WindowManager.LayoutParams winParams = win.getAttributes(); 366 367 winParams.flags |= (WindowManager.LayoutParams.FLAG_LAYOUT_IN_SCREEN); 368 winParams.flags |= (WindowManager.LayoutParams.FLAG_LAYOUT_NO_LIMITS); 369 370 // dim the wallpaper somewhat (how much is determined below) 371 winParams.flags |= (WindowManager.LayoutParams.FLAG_DIM_BEHIND); 372 373 if (mDimmed) { 374 winParams.flags |= WindowManager.LayoutParams.FLAG_FULLSCREEN; 375 winParams.dimAmount = DIM_BEHIND_AMOUNT_DIMMED; 376 winParams.buttonBrightness = WindowManager.LayoutParams.BRIGHTNESS_OVERRIDE_OFF; 377 378 // show the window tint 379 tintView.startAnimation(AnimationUtils.loadAnimation(this, 380 fade ? R.anim.dim 381 : R.anim.dim_instant)); 382 } else { 383 winParams.flags &= (~WindowManager.LayoutParams.FLAG_FULLSCREEN); 384 winParams.dimAmount = DIM_BEHIND_AMOUNT_NORMAL; 385 winParams.buttonBrightness = WindowManager.LayoutParams.BRIGHTNESS_OVERRIDE_NONE; 386 387 // hide the window tint 388 tintView.startAnimation(AnimationUtils.loadAnimation(this, 389 fade ? R.anim.undim 390 : R.anim.undim_instant)); 391 } 392 393 win.setAttributes(winParams); 394 } 395 396 @Override 397 public void onNewIntent(Intent newIntent) { 398 super.onNewIntent(newIntent); 399 if (DEBUG) Log.d(LOG_TAG, "onNewIntent with intent: " + newIntent); 400 401 // update our intent so that we can consult it to determine whether or 402 // not the most recent launch was via a dock event 403 setIntent(newIntent); 404 } 405 406 @Override 407 public void onStart() { 408 super.onStart(); 409 410 IntentFilter filter = new IntentFilter(); 411 filter.addAction(Intent.ACTION_DATE_CHANGED); 412 filter.addAction(Intent.ACTION_BATTERY_CHANGED); 413 filter.addAction(Intent.ACTION_DOCK_EVENT); 414 filter.addAction(UiModeManager.ACTION_EXIT_DESK_MODE); 415 filter.addAction(ACTION_MIDNIGHT); 416 registerReceiver(mIntentReceiver, filter); 417 } 418 419 @Override 420 public void onStop() { 421 super.onStop(); 422 423 unregisterReceiver(mIntentReceiver); 424 } 425 426 @Override 427 public void onResume() { 428 super.onResume(); 429 if (DEBUG) Log.d(LOG_TAG, "onResume with intent: " + getIntent()); 430 431 // reload the date format in case the user has changed settings 432 // recently 433 mDateFormat = getString(R.string.full_wday_month_day_no_year); 434 435 // Elaborate mechanism to find out when the day rolls over 436 Calendar today = Calendar.getInstance(); 437 today.set(Calendar.HOUR_OF_DAY, 0); 438 today.set(Calendar.MINUTE, 0); 439 today.set(Calendar.SECOND, 0); 440 today.add(Calendar.DATE, 1); 441 long alarmTimeUTC = today.getTimeInMillis(); 442 443 mMidnightIntent = PendingIntent.getBroadcast(this, 0, new Intent(ACTION_MIDNIGHT), 0); 444 AlarmManager am = (AlarmManager) getSystemService(Context.ALARM_SERVICE); 445 am.setRepeating(AlarmManager.RTC, alarmTimeUTC, AlarmManager.INTERVAL_DAY, mMidnightIntent); 446 if (DEBUG) Log.d(LOG_TAG, "set repeating midnight event at UTC: " 447 + alarmTimeUTC + " (" 448 + (alarmTimeUTC - System.currentTimeMillis()) 449 + " ms from now) repeating every " 450 + AlarmManager.INTERVAL_DAY + " with intent: " + mMidnightIntent); 451 452 // If we weren't previously visible but now we are, it's because we're 453 // being started from another activity. So it's OK to un-dim. 454 if (mTime != null && mTime.getWindowVisibility() != View.VISIBLE) { 455 mDimmed = false; 456 } 457 458 // Adjust the display to reflect the currently chosen dim mode. 459 doDim(false); 460 461 restoreScreen(); // disable screen saver 462 refreshAll(); // will schedule periodic weather fetch 463 464 setWakeLock(mPluggedIn); 465 466 scheduleScreenSaver(); 467 468 final boolean launchedFromDock 469 = getIntent().hasCategory(Intent.CATEGORY_DESK_DOCK); 470 471 mLaunchedFromDock = launchedFromDock; 472 } 473 474 @Override 475 public void onPause() { 476 if (DEBUG) Log.d(LOG_TAG, "onPause"); 477 478 // Turn off the screen saver and cancel any pending timeouts. 479 // (But don't un-dim.) 480 mHandy.removeMessages(SCREEN_SAVER_TIMEOUT_MSG); 481 restoreScreen(); 482 483 AlarmManager am = (AlarmManager) getSystemService(Context.ALARM_SERVICE); 484 am.cancel(mMidnightIntent); 485 486 super.onPause(); 487 } 488 489 private void initViews() { 490 // give up any internal focus before we switch layouts 491 final View focused = getCurrentFocus(); 492 if (focused != null) focused.clearFocus(); 493 494 setContentView(R.layout.desk_clock); 495 496 mTime = (DigitalClock) findViewById(R.id.time); 497 mDate = (TextView) findViewById(R.id.date); 498 mBatteryDisplay = (TextView) findViewById(R.id.battery); 499 500 mTime.setSystemUiVisibility(View.STATUS_BAR_VISIBLE); 501 mTime.getRootView().requestFocus(); 502 503 final View.OnClickListener alarmClickListener = new View.OnClickListener() { 504 @Override 505 public void onClick(View v) { 506 startActivity(new Intent(DeskClock.this, AlarmClock.class)); 507 } 508 }; 509 510 mNextAlarm = (TextView) findViewById(R.id.nextAlarm); 511 mNextAlarm.setOnClickListener(alarmClickListener); 512 513 mAlarmButton = findViewById(R.id.alarm_button); 514 View alarmControl = mAlarmButton != null ? mAlarmButton : findViewById(R.id.nextAlarm); 515 alarmControl.setOnClickListener(alarmClickListener); 516 517 final ImageButton nightmodeButton = (ImageButton) findViewById(R.id.nightmode_button); 518 if (nightmodeButton != null) { 519 nightmodeButton.setOnClickListener(new View.OnClickListener() { 520 public void onClick(View v) { 521 mDimmed = ! mDimmed; 522 doDim(true); 523 } 524 }); 525 526 nightmodeButton.setOnLongClickListener(new View.OnLongClickListener() { 527 public boolean onLongClick(View v) { 528 saveScreen(); 529 return true; 530 } 531 }); 532 } 533 534 final View tintView = findViewById(R.id.window_tint); 535 tintView.setOnTouchListener(new View.OnTouchListener() { 536 public boolean onTouch(View v, MotionEvent event) { 537 if (mDimmed && event.getAction() == MotionEvent.ACTION_DOWN) { 538 // We want to un-dim the whole screen on tap. 539 // ...Unless the user is specifically tapping on the dim 540 // widget, in which case let it do the work. 541 Rect r = new Rect(); 542 nightmodeButton.getHitRect(r); 543 int[] gloc = new int[2]; 544 nightmodeButton.getLocationInWindow(gloc); 545 r.offsetTo(gloc[0], gloc[1]); // convert to window coords 546 547 if (!r.contains((int) event.getX(), (int) event.getY())) { 548 mDimmed = false; 549 doDim(true); 550 } 551 } 552 return false; // always pass the click through 553 } 554 }); 555 556 // Tidy up awkward focus behavior: the first view to be focused in 557 // trackball mode should be the alarms button 558 final ViewTreeObserver vto = alarmControl.getViewTreeObserver(); 559 final View alarmView = alarmControl; 560 vto.addOnGlobalFocusChangeListener(new ViewTreeObserver.OnGlobalFocusChangeListener() { 561 public void onGlobalFocusChanged(View oldFocus, View newFocus) { 562 if (oldFocus == null && newFocus == nightmodeButton) { 563 alarmView.requestFocus(); 564 } 565 } 566 }); 567 } 568 569 @Override 570 public void onConfigurationChanged(Configuration newConfig) { 571 super.onConfigurationChanged(newConfig); 572 if (mScreenSaverMode) { 573 moveScreenSaver(); 574 } else { 575 initViews(); 576 doDim(false); 577 refreshAll(); 578 } 579 } 580 581 @Override 582 public boolean onOptionsItemSelected(MenuItem item) { 583 switch (item.getItemId()) { 584 case R.id.menu_item_alarms: 585 startActivity(new Intent(DeskClock.this, AlarmClock.class)); 586 return true; 587 case R.id.menu_item_add_alarm: 588 startActivity(new Intent(this, SetAlarm.class)); 589 return true; 590 case R.id.menu_item_dock_settings: 591 startActivity(new Intent(DOCK_SETTINGS_ACTION)); 592 return true; 593 default: 594 return false; 595 } 596 } 597 598 @Override 599 public boolean onCreateOptionsMenu(Menu menu) { 600 MenuInflater inflater = getMenuInflater(); 601 inflater.inflate(R.menu.desk_clock_menu, menu); 602 return true; 603 } 604 605 @Override 606 public boolean onPrepareOptionsMenu(Menu menu) { 607 // Only show the "Dock settings" menu item if the device supports it. 608 boolean isDockSupported = 609 (getPackageManager().resolveActivity(new Intent(DOCK_SETTINGS_ACTION), 0) != null); 610 menu.findItem(R.id.menu_item_dock_settings).setVisible(isDockSupported); 611 return super.onPrepareOptionsMenu(menu); 612 } 613 614 @Override 615 protected void onCreate(Bundle icicle) { 616 super.onCreate(icicle); 617 618 mRNG = new Random(); 619 620 initViews(); 621 } 622} 623