content: /*
   * Copyright (C) 2008 The Android Open Source Project
   *
   * Licensed under the Apache License, Version 2.0 (the "License");
   * you may not use this file except in compliance with the License.
   * You may obtain a copy of the License at
   *
   *      http://www.apache.org/licenses/LICENSE-2.0
   *
   * Unless required by applicable law or agreed to in writing, software
   * distributed under the License is distributed on an "AS IS" BASIS,
   * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
   * See the License for the specific language governing permissions and
   * limitations under the License.
   */
  
  package android.content.res;
  
  import static android.content.ConfigurationProto.COLOR_MODE;
  import static android.content.ConfigurationProto.DENSITY_DPI;
  import static android.content.ConfigurationProto.FONT_SCALE;
  import static android.content.ConfigurationProto.HARD_KEYBOARD_HIDDEN;
  import static android.content.ConfigurationProto.KEYBOARD;
  import static android.content.ConfigurationProto.KEYBOARD_HIDDEN;
  import static android.content.ConfigurationProto.LOCALES;
  import static android.content.ConfigurationProto.LOCALE_LIST;
  import static android.content.ConfigurationProto.MCC;
  import static android.content.ConfigurationProto.MNC;
  import static android.content.ConfigurationProto.NAVIGATION;
  import static android.content.ConfigurationProto.NAVIGATION_HIDDEN;
  import static android.content.ConfigurationProto.ORIENTATION;
  import static android.content.ConfigurationProto.SCREEN_HEIGHT_DP;
  import static android.content.ConfigurationProto.SCREEN_LAYOUT;
  import static android.content.ConfigurationProto.SCREEN_WIDTH_DP;
  import static android.content.ConfigurationProto.SMALLEST_SCREEN_WIDTH_DP;
  import static android.content.ConfigurationProto.TOUCHSCREEN;
  import static android.content.ConfigurationProto.UI_MODE;
  import static android.content.ConfigurationProto.WINDOW_CONFIGURATION;
  import static android.content.ResourcesConfigurationProto.CONFIGURATION;
  import static android.content.ResourcesConfigurationProto.SCREEN_HEIGHT_PX;
  import static android.content.ResourcesConfigurationProto.SCREEN_WIDTH_PX;
  import static android.content.ResourcesConfigurationProto.SDK_VERSION;
  
  import android.annotation.IntDef;
  import android.annotation.NonNull;
  import android.annotation.Nullable;
  import android.annotation.TestApi;
  import android.annotation.UnsupportedAppUsage;
  import android.app.WindowConfiguration;
  import android.content.LocaleProto;
  import android.content.pm.ActivityInfo;
  import android.content.pm.ActivityInfo.Config;
  import android.os.Build;
  import android.os.LocaleList;
  import android.os.Parcel;
  import android.os.Parcelable;
  import android.text.TextUtils;
  import android.util.DisplayMetrics;
  import android.util.Slog;
  import android.util.proto.ProtoInputStream;
  import android.util.proto.ProtoOutputStream;
  import android.util.proto.WireTypeMismatchException;
  import android.view.View;
  
  import com.android.internal.util.XmlUtils;
  
  import org.xmlpull.v1.XmlPullParser;
  import org.xmlpull.v1.XmlPullParserException;
  import org.xmlpull.v1.XmlSerializer;
  
  import java.io.IOException;
  import java.lang.annotation.Retention;
  import java.lang.annotation.RetentionPolicy;
  import java.util.ArrayList;
  import java.util.IllformedLocaleException;
  import java.util.List;
  import java.util.Locale;
  
  /**
   * This class describes all device configuration information that can
   * impact the resources the application retrieves.  This includes both
   * user-specified configuration options (locale list and scaling) as well
   * as device configurations (such as input modes, screen size and screen orientation).
   * <p>You can acquire this object from {@link Resources}, using {@link
   * Resources#getConfiguration}. Thus, from an activity, you can get it by chaining the request
   * with {@link android.app.Activity#getResources}:</p>
   * <pre>Configuration config = getResources().getConfiguration();</pre>
   */
  public final class Configuration implements Parcelable, Comparable<Configuration> {
      /** @hide */
      public static final Configuration EMPTY = new Configuration();
  
      private static final String TAG = "Configuration";
  
      /**
       * Current user preference for the scaling factor for fonts, relative
       * to the base density scaling.
       */
      public float fontScale;
  
      /**
       * IMSI MCC (Mobile Country Code), corresponding to
       * <a href="{@docRoot}guide/topics/resources/providing-resources.html#MccQualifier">mcc</a>
       * resource qualifier.  0 if undefined.
       */
      public int mcc;
  
      /**
       * IMSI MNC (Mobile Network Code), corresponding to
       * <a href="{@docRoot}guide/topics/resources/providing-resources.html#MccQualifier">mnc</a>
       * resource qualifier.  0 if undefined. Note that the actual MNC may be 0; in order to check
       * for this use the {@link #MNC_ZERO} symbol.
       */
      public int mnc;
  
      /**
       * Constant used to to represent MNC (Mobile Network Code) zero.
       * 0 cannot be used, since it is used to represent an undefined MNC.
       */
      public static final int MNC_ZERO = 0xffff;
  
      /**
       * Current user preference for the locale, corresponding to
       * <a href="{@docRoot}guide/topics/resources/providing-resources.html#LocaleQualifier">locale</a>
       * resource qualifier.
       *
       * @deprecated Do not set or read this directly. Use {@link #getLocales()} and
       * {@link #setLocales(LocaleList)}. If only the primary locale is needed,
       * <code>getLocales().get(0)</code> is now the preferred accessor.
       */
      @Deprecated public Locale locale;
  
      private LocaleList mLocaleList;
  
      /**
       * Locale should persist on setting.  This is hidden because it is really
       * questionable whether this is the right way to expose the functionality.
       * @hide
       */
      @UnsupportedAppUsage
      public boolean userSetLocale;
  
  
      /** Constant for {@link #colorMode}: bits that encode whether the screen is wide gamut. */
      public static final int COLOR_MODE_WIDE_COLOR_GAMUT_MASK = 0x3;
      /**
       * Constant for {@link #colorMode}: a {@link #COLOR_MODE_WIDE_COLOR_GAMUT_MASK} value
       * indicating that it is unknown whether or not the screen is wide gamut.
       */
      public static final int COLOR_MODE_WIDE_COLOR_GAMUT_UNDEFINED = 0x0;
      /**
       * Constant for {@link #colorMode}: a {@link #COLOR_MODE_WIDE_COLOR_GAMUT_MASK} value
       * indicating that the screen is not wide gamut.
       * <p>Corresponds to the <code>-nowidecg</code> resource qualifier.</p>
       */
      public static final int COLOR_MODE_WIDE_COLOR_GAMUT_NO = 0x1;
      /**
       * Constant for {@link #colorMode}: a {@link #COLOR_MODE_WIDE_COLOR_GAMUT_MASK} value
       * indicating that the screen is wide gamut.
       * <p>Corresponds to the <code>-widecg</code> resource qualifier.</p>
       */
      public static final int COLOR_MODE_WIDE_COLOR_GAMUT_YES = 0x2;
  
      /** Constant for {@link #colorMode}: bits that encode the dynamic range of the screen. */
      public static final int COLOR_MODE_HDR_MASK = 0xc;
      /** Constant for {@link #colorMode}: bits shift to get the screen dynamic range. */
      public static final int COLOR_MODE_HDR_SHIFT = 2;
      /**
       * Constant for {@link #colorMode}: a {@link #COLOR_MODE_HDR_MASK} value
       * indicating that it is unknown whether or not the screen is HDR.
       */
      public static final int COLOR_MODE_HDR_UNDEFINED = 0x0;
      /**
       * Constant for {@link #colorMode}: a {@link #COLOR_MODE_HDR_MASK} value
       * indicating that the screen is not HDR (low/standard dynamic range).
       * <p>Corresponds to the <code>-lowdr</code> resource qualifier.</p>
       */
      public static final int COLOR_MODE_HDR_NO = 0x1 << COLOR_MODE_HDR_SHIFT;
      /**
       * Constant for {@link #colorMode}: a {@link #COLOR_MODE_HDR_MASK} value
       * indicating that the screen is HDR (dynamic range).
       * <p>Corresponds to the <code>-highdr</code> resource qualifier.</p>
       */
      public static final int COLOR_MODE_HDR_YES = 0x2 << COLOR_MODE_HDR_SHIFT;
  
      /** Constant for {@link #colorMode}: a value indicating that the color mode is undefined */
      @SuppressWarnings("PointlessBitwiseExpression")
      public static final int COLOR_MODE_UNDEFINED = COLOR_MODE_WIDE_COLOR_GAMUT_UNDEFINED |
              COLOR_MODE_HDR_UNDEFINED;
  
      /**
       * Bit mask of color capabilities of the screen. Currently there are two fields:
       * <p>The {@link #COLOR_MODE_WIDE_COLOR_GAMUT_MASK} bits define the color gamut of
       * the screen. They may be one of
       * {@link #COLOR_MODE_WIDE_COLOR_GAMUT_NO} or {@link #COLOR_MODE_WIDE_COLOR_GAMUT_YES}.</p>
       *
       * <p>The {@link #COLOR_MODE_HDR_MASK} defines the dynamic range of the screen. They may be
       * one of {@link #COLOR_MODE_HDR_NO} or {@link #COLOR_MODE_HDR_YES}.</p>
       *
       * <p>See <a href="{@docRoot}guide/practices/screens_support.html">Supporting
       * Multiple Screens</a> for more information.</p>
       */
      public int colorMode;
  
      /** Constant for {@link #screenLayout}: bits that encode the size. */
      public static final int SCREENLAYOUT_SIZE_MASK = 0x0f;
      /** Constant for {@link #screenLayout}: a {@link #SCREENLAYOUT_SIZE_MASK}
       * value indicating that no size has been set. */
      public static final int SCREENLAYOUT_SIZE_UNDEFINED = 0x00;
      /** Constant for {@link #screenLayout}: a {@link #SCREENLAYOUT_SIZE_MASK}
       * value indicating the screen is at least approximately 320x426 dp units,
       * corresponds to the
       * <a href="{@docRoot}guide/topics/resources/providing-resources.html#ScreenSizeQualifier">small</a>
       * resource qualifier.
       * See <a href="{@docRoot}guide/practices/screens_support.html">Supporting
       * Multiple Screens</a> for more information. */
      public static final int SCREENLAYOUT_SIZE_SMALL = 0x01;
      /** Constant for {@link #screenLayout}: a {@link #SCREENLAYOUT_SIZE_MASK}
       * value indicating the screen is at least approximately 320x470 dp units,
       * corresponds to the
       * <a href="{@docRoot}guide/topics/resources/providing-resources.html#ScreenSizeQualifier">normal</a>
       * resource qualifier.
       * See <a href="{@docRoot}guide/practices/screens_support.html">Supporting
       * Multiple Screens</a> for more information. */
      public static final int SCREENLAYOUT_SIZE_NORMAL = 0x02;
      /** Constant for {@link #screenLayout}: a {@link #SCREENLAYOUT_SIZE_MASK}
       * value indicating the screen is at least approximately 480x640 dp units,
       * corresponds to the
       * <a href="{@docRoot}guide/topics/resources/providing-resources.html#ScreenSizeQualifier">large</a>
       * resource qualifier.
       * See <a href="{@docRoot}guide/practices/screens_support.html">Supporting
       * Multiple Screens</a> for more information. */
      public static final int SCREENLAYOUT_SIZE_LARGE = 0x03;
      /** Constant for {@link #screenLayout}: a {@link #SCREENLAYOUT_SIZE_MASK}
       * value indicating the screen is at least approximately 720x960 dp units,
       * corresponds to the
       * <a href="{@docRoot}guide/topics/resources/providing-resources.html#ScreenSizeQualifier">xlarge</a>
       * resource qualifier.
       * See <a href="{@docRoot}guide/practices/screens_support.html">Supporting
       * Multiple Screens</a> for more information.*/
      public static final int SCREENLAYOUT_SIZE_XLARGE = 0x04;
  
      /** Constant for {@link #screenLayout}: bits that encode the aspect ratio. */
      public static final int SCREENLAYOUT_LONG_MASK = 0x30;
      /** Constant for {@link #screenLayout}: a {@link #SCREENLAYOUT_LONG_MASK}
       * value indicating that no size has been set. */
      public static final int SCREENLAYOUT_LONG_UNDEFINED = 0x00;
      /** Constant for {@link #screenLayout}: a {@link #SCREENLAYOUT_LONG_MASK}
       * value that corresponds to the
       * <a href="{@docRoot}guide/topics/resources/providing-resources.html#ScreenAspectQualifier">notlong</a>
       * resource qualifier. */
      public static final int SCREENLAYOUT_LONG_NO = 0x10;
      /** Constant for {@link #screenLayout}: a {@link #SCREENLAYOUT_LONG_MASK}
       * value that corresponds to the
       * <a href="{@docRoot}guide/topics/resources/providing-resources.html#ScreenAspectQualifier">long</a>
       * resource qualifier. */
      public static final int SCREENLAYOUT_LONG_YES = 0x20;
  
      /** Constant for {@link #screenLayout}: bits that encode the layout direction. */
      public static final int SCREENLAYOUT_LAYOUTDIR_MASK = 0xC0;
      /** Constant for {@link #screenLayout}: bits shift to get the layout direction. */
      public static final int SCREENLAYOUT_LAYOUTDIR_SHIFT = 6;
      /** Constant for {@link #screenLayout}: a {@link #SCREENLAYOUT_LAYOUTDIR_MASK}
       * value indicating that no layout dir has been set. */
      public static final int SCREENLAYOUT_LAYOUTDIR_UNDEFINED = 0x00;
      /** Constant for {@link #screenLayout}: a {@link #SCREENLAYOUT_LAYOUTDIR_MASK}
       * value indicating that a layout dir has been set to LTR. */
      public static final int SCREENLAYOUT_LAYOUTDIR_LTR = 0x01 << SCREENLAYOUT_LAYOUTDIR_SHIFT;
      /** Constant for {@link #screenLayout}: a {@link #SCREENLAYOUT_LAYOUTDIR_MASK}
       * value indicating that a layout dir has been set to RTL. */
      public static final int SCREENLAYOUT_LAYOUTDIR_RTL = 0x02 << SCREENLAYOUT_LAYOUTDIR_SHIFT;
  
      /** Constant for {@link #screenLayout}: bits that encode roundness of the screen. */
      public static final int SCREENLAYOUT_ROUND_MASK = 0x300;
      /** @hide Constant for {@link #screenLayout}: bit shift to get to screen roundness bits */
      public static final int SCREENLAYOUT_ROUND_SHIFT = 8;
      /**
       * Constant for {@link #screenLayout}: a {@link #SCREENLAYOUT_ROUND_MASK} value indicating
       * that it is unknown whether or not the screen has a round shape.
       */
      public static final int SCREENLAYOUT_ROUND_UNDEFINED = 0x00;
      /**
       * Constant for {@link #screenLayout}: a {@link #SCREENLAYOUT_ROUND_MASK} value indicating
       * that the screen does not have a rounded shape.
       */
      public static final int SCREENLAYOUT_ROUND_NO = 0x1 << SCREENLAYOUT_ROUND_SHIFT;
      /**
       * Constant for {@link #screenLayout}: a {@link #SCREENLAYOUT_ROUND_MASK} value indicating
       * that the screen has a rounded shape. Corners may not be visible to the user;
       * developers should pay special attention to the {@link android.view.WindowInsets} delivered
       * to views for more information about ensuring content is not obscured.
       *
       * <p>Corresponds to the <code>-round</code> resource qualifier.</p>
       */
      public static final int SCREENLAYOUT_ROUND_YES = 0x2 << SCREENLAYOUT_ROUND_SHIFT;
  
      /** Constant for {@link #screenLayout}: a value indicating that screenLayout is undefined */
      public static final int SCREENLAYOUT_UNDEFINED = SCREENLAYOUT_SIZE_UNDEFINED |
              SCREENLAYOUT_LONG_UNDEFINED | SCREENLAYOUT_LAYOUTDIR_UNDEFINED |
              SCREENLAYOUT_ROUND_UNDEFINED;
  
      /**
       * Special flag we generate to indicate that the screen layout requires
       * us to use a compatibility mode for apps that are not modern layout
       * aware.
       * @hide
       */
      public static final int SCREENLAYOUT_COMPAT_NEEDED = 0x10000000;
  
      /**
       * Bit mask of overall layout of the screen.  Currently there are four
       * fields:
       * <p>The {@link #SCREENLAYOUT_SIZE_MASK} bits define the overall size
       * of the screen.  They may be one of
       * {@link #SCREENLAYOUT_SIZE_SMALL}, {@link #SCREENLAYOUT_SIZE_NORMAL},
       * {@link #SCREENLAYOUT_SIZE_LARGE}, or {@link #SCREENLAYOUT_SIZE_XLARGE}.</p>
       *
       * <p>The {@link #SCREENLAYOUT_LONG_MASK} defines whether the screen
       * is wider/taller than normal.  They may be one of
       * {@link #SCREENLAYOUT_LONG_NO} or {@link #SCREENLAYOUT_LONG_YES}.</p>
       *
       * <p>The {@link #SCREENLAYOUT_LAYOUTDIR_MASK} defines whether the screen layout
       * is either LTR or RTL.  They may be one of
       * {@link #SCREENLAYOUT_LAYOUTDIR_LTR} or {@link #SCREENLAYOUT_LAYOUTDIR_RTL}.</p>
       *
       * <p>The {@link #SCREENLAYOUT_ROUND_MASK} defines whether the screen has a rounded
       * shape. They may be one of {@link #SCREENLAYOUT_ROUND_NO} or {@link #SCREENLAYOUT_ROUND_YES}.
       * </p>
       *
       * <p>See <a href="{@docRoot}guide/practices/screens_support.html">Supporting
       * Multiple Screens</a> for more information.</p>
       */
      public int screenLayout;
  
      /**
       * Configuration relating to the windowing state of the object associated with this
       * Configuration. Contents of this field are not intended to affect resources, but need to be
       * communicated and propagated at the same time as the rest of Configuration.
       * @hide
       */
      @TestApi
      public final WindowConfiguration windowConfiguration = new WindowConfiguration();
  
      /** @hide */
      static public int resetScreenLayout(int curLayout) {
          return (curLayout&~(SCREENLAYOUT_LONG_MASK | SCREENLAYOUT_SIZE_MASK
                          | SCREENLAYOUT_COMPAT_NEEDED))
                  | (SCREENLAYOUT_LONG_YES | SCREENLAYOUT_SIZE_XLARGE);
      }
  
      /** @hide */
      static public int reduceScreenLayout(int curLayout, int longSizeDp, int shortSizeDp) {
          int screenLayoutSize;
          boolean screenLayoutLong;
          boolean screenLayoutCompatNeeded;
  
          // These semi-magic numbers define our compatibility modes for
          // applications with different screens.  These are guarantees to
          // app developers about the space they can expect for a particular
          // configuration.  DO NOT CHANGE!
          if (longSizeDp < 470) {
              // This is shorter than an HVGA normal density screen (which
              // is 480 pixels on its long side).
              screenLayoutSize = SCREENLAYOUT_SIZE_SMALL;
              screenLayoutLong = false;
              screenLayoutCompatNeeded = false;
          } else {
              // What size is this screen screen?
              if (longSizeDp >= 960 && shortSizeDp >= 720) {
                  // 1.5xVGA or larger screens at medium density are the point
                  // at which we consider it to be an extra large screen.
                  screenLayoutSize = SCREENLAYOUT_SIZE_XLARGE;
              } else if (longSizeDp >= 640 && shortSizeDp >= 480) {
                  // VGA or larger screens at medium density are the point
                  // at which we consider it to be a large screen.
                  screenLayoutSize = SCREENLAYOUT_SIZE_LARGE;
              } else {
                  screenLayoutSize = SCREENLAYOUT_SIZE_NORMAL;
              }
  
              // If this screen is wider than normal HVGA, or taller
              // than FWVGA, then for old apps we want to run in size
              // compatibility mode.
              if (shortSizeDp > 321 || longSizeDp > 570) {
                  screenLayoutCompatNeeded = true;
              } else {
                  screenLayoutCompatNeeded = false;
              }
  
              // Is this a long screen?
              if (((longSizeDp*3)/5) >= (shortSizeDp-1)) {
                  // Anything wider than WVGA (5:3) is considering to be long.
                  screenLayoutLong = true;
              } else {
                  screenLayoutLong = false;
              }
          }
  
          // Now reduce the last screenLayout to not be better than what we
          // have found.
          if (!screenLayoutLong) {
              curLayout = (curLayout&~SCREENLAYOUT_LONG_MASK) | SCREENLAYOUT_LONG_NO;
          }
          if (screenLayoutCompatNeeded) {
              curLayout |= Configuration.SCREENLAYOUT_COMPAT_NEEDED;
          }
          int curSize = curLayout&SCREENLAYOUT_SIZE_MASK;
          if (screenLayoutSize < curSize) {
              curLayout = (curLayout&~SCREENLAYOUT_SIZE_MASK) | screenLayoutSize;
          }
          return curLayout;
      }
  
      /** @hide */
      public static String configurationDiffToString(int diff) {
          ArrayList<String> list = new ArrayList<>();
          if ((diff & ActivityInfo.CONFIG_MCC) != 0) {
              list.add("CONFIG_MCC");
          }
          if ((diff & ActivityInfo.CONFIG_MNC) != 0) {
              list.add("CONFIG_MNC");
          }
          if ((diff & ActivityInfo.CONFIG_LOCALE) != 0) {
              list.add("CONFIG_LOCALE");
          }
          if ((diff & ActivityInfo.CONFIG_TOUCHSCREEN) != 0) {
              list.add("CONFIG_TOUCHSCREEN");
          }
          if ((diff & ActivityInfo.CONFIG_KEYBOARD) != 0) {
              list.add("CONFIG_KEYBOARD");
          }
          if ((diff & ActivityInfo.CONFIG_KEYBOARD_HIDDEN) != 0) {
              list.add("CONFIG_KEYBOARD_HIDDEN");
          }
          if ((diff & ActivityInfo.CONFIG_NAVIGATION) != 0) {
              list.add("CONFIG_NAVIGATION");
          }
          if ((diff & ActivityInfo.CONFIG_ORIENTATION) != 0) {
              list.add("CONFIG_ORIENTATION");
          }
          if ((diff & ActivityInfo.CONFIG_SCREEN_LAYOUT) != 0) {
              list.add("CONFIG_SCREEN_LAYOUT");
          }
          if ((diff & ActivityInfo.CONFIG_COLOR_MODE) != 0) {
              list.add("CONFIG_COLOR_MODE");
          }
          if ((diff & ActivityInfo.CONFIG_UI_MODE) != 0) {
              list.add("CONFIG_UI_MODE");
          }
          if ((diff & ActivityInfo.CONFIG_SCREEN_SIZE) != 0) {
              list.add("CONFIG_SCREEN_SIZE");
          }
          if ((diff & ActivityInfo.CONFIG_SMALLEST_SCREEN_SIZE) != 0) {
              list.add("CONFIG_SMALLEST_SCREEN_SIZE");
          }
          if ((diff & ActivityInfo.CONFIG_LAYOUT_DIRECTION) != 0) {
              list.add("CONFIG_LAYOUT_DIRECTION");
          }
          if ((diff & ActivityInfo.CONFIG_FONT_SCALE) != 0) {
              list.add("CONFIG_FONT_SCALE");
          }
          if ((diff & ActivityInfo.CONFIG_ASSETS_PATHS) != 0) {
              list.add("CONFIG_ASSETS_PATHS");
          }
          StringBuilder builder = new StringBuilder("{");
          for (int i = 0, n = list.size(); i < n; i++) {
              builder.append(list.get(i));
              if (i != n - 1) {
                  builder.append(", ");
              }
          }
          builder.append("}");
          return builder.toString();
      }
  
      /**
       * Check if the Configuration's current {@link #screenLayout} is at
       * least the given size.
       *
       * @param size The desired size, either {@link #SCREENLAYOUT_SIZE_SMALL},
       * {@link #SCREENLAYOUT_SIZE_NORMAL}, {@link #SCREENLAYOUT_SIZE_LARGE}, or
       * {@link #SCREENLAYOUT_SIZE_XLARGE}.
       * @return Returns true if the current screen layout size is at least
       * the given size.
       */
      public boolean isLayoutSizeAtLeast(int size) {
          int cur = screenLayout&SCREENLAYOUT_SIZE_MASK;
          if (cur == SCREENLAYOUT_SIZE_UNDEFINED) return false;
          return cur >= size;
      }
  
      /** Constant for {@link #touchscreen}: a value indicating that no value has been set. */
      public static final int TOUCHSCREEN_UNDEFINED = 0;
      /** Constant for {@link #touchscreen}, value corresponding to the
       * <a href="{@docRoot}guide/topics/resources/providing-resources.html#TouchscreenQualifier">notouch</a>
       * resource qualifier. */
      public static final int TOUCHSCREEN_NOTOUCH = 1;
      /** @deprecated Not currently supported or used. */
      @Deprecated public static final int TOUCHSCREEN_STYLUS = 2;
      /** Constant for {@link #touchscreen}, value corresponding to the
       * <a href="{@docRoot}guide/topics/resources/providing-resources.html#TouchscreenQualifier">finger</a>
       * resource qualifier. */
      public static final int TOUCHSCREEN_FINGER = 3;
  
      /**
       * The kind of touch screen attached to the device.
       * One of: {@link #TOUCHSCREEN_NOTOUCH}, {@link #TOUCHSCREEN_FINGER}.
       */
      public int touchscreen;
  
      /** Constant for {@link #keyboard}: a value indicating that no value has been set. */
      public static final int KEYBOARD_UNDEFINED = 0;
      /** Constant for {@link #keyboard}, value corresponding to the
       * <a href="{@docRoot}guide/topics/resources/providing-resources.html#ImeQualifier">nokeys</a>
       * resource qualifier. */
      public static final int KEYBOARD_NOKEYS = 1;
      /** Constant for {@link #keyboard}, value corresponding to the
       * <a href="{@docRoot}guide/topics/resources/providing-resources.html#ImeQualifier">qwerty</a>
       * resource qualifier. */
      public static final int KEYBOARD_QWERTY = 2;
      /** Constant for {@link #keyboard}, value corresponding to the
       * <a href="{@docRoot}guide/topics/resources/providing-resources.html#ImeQualifier">12key</a>
       * resource qualifier. */
      public static final int KEYBOARD_12KEY = 3;
  
      /**
       * The kind of keyboard attached to the device.
       * One of: {@link #KEYBOARD_NOKEYS}, {@link #KEYBOARD_QWERTY},
       * {@link #KEYBOARD_12KEY}.
       */
      public int keyboard;
  
      /** Constant for {@link #keyboardHidden}: a value indicating that no value has been set. */
      public static final int KEYBOARDHIDDEN_UNDEFINED = 0;
      /** Constant for {@link #keyboardHidden}, value corresponding to the
       * <a href="{@docRoot}guide/topics/resources/providing-resources.html#KeyboardAvailQualifier">keysexposed</a>
       * resource qualifier. */
      public static final int KEYBOARDHIDDEN_NO = 1;
      /** Constant for {@link #keyboardHidden}, value corresponding to the
       * <a href="{@docRoot}guide/topics/resources/providing-resources.html#KeyboardAvailQualifier">keyshidden</a>
       * resource qualifier. */
      public static final int KEYBOARDHIDDEN_YES = 2;
      /** Constant matching actual resource implementation. {@hide} */
      public static final int KEYBOARDHIDDEN_SOFT = 3;
  
      /**
       * A flag indicating whether any keyboard is available.  Unlike
       * {@link #hardKeyboardHidden}, this also takes into account a soft
       * keyboard, so if the hard keyboard is hidden but there is soft
       * keyboard available, it will be set to NO.  Value is one of:
       * {@link #KEYBOARDHIDDEN_NO}, {@link #KEYBOARDHIDDEN_YES}.
       */
      public int keyboardHidden;
  
      /** Constant for {@link #hardKeyboardHidden}: a value indicating that no value has been set. */
      public static final int HARDKEYBOARDHIDDEN_UNDEFINED = 0;
      /** Constant for {@link #hardKeyboardHidden}, value corresponding to the
       * physical keyboard being exposed. */
      public static final int HARDKEYBOARDHIDDEN_NO = 1;
      /** Constant for {@link #hardKeyboardHidden}, value corresponding to the
       * physical keyboard being hidden. */
      public static final int HARDKEYBOARDHIDDEN_YES = 2;
  
      /**
       * A flag indicating whether the hard keyboard has been hidden.  This will
       * be set on a device with a mechanism to hide the keyboard from the
       * user, when that mechanism is closed.  One of:
       * {@link #HARDKEYBOARDHIDDEN_NO}, {@link #HARDKEYBOARDHIDDEN_YES}.
       */
      public int hardKeyboardHidden;
  
      /** Constant for {@link #navigation}: a value indicating that no value has been set. */
      public static final int NAVIGATION_UNDEFINED = 0;
      /** Constant for {@link #navigation}, value corresponding to the
       * <a href="{@docRoot}guide/topics/resources/providing-resources.html#NavigationQualifier">nonav</a>
       * resource qualifier. */
      public static final int NAVIGATION_NONAV = 1;
      /** Constant for {@link #navigation}, value corresponding to the
       * <a href="{@docRoot}guide/topics/resources/providing-resources.html#NavigationQualifier">dpad</a>
       * resource qualifier. */
      public static final int NAVIGATION_DPAD = 2;
      /** Constant for {@link #navigation}, value corresponding to the
       * <a href="{@docRoot}guide/topics/resources/providing-resources.html#NavigationQualifier">trackball</a>
       * resource qualifier. */
      public static final int NAVIGATION_TRACKBALL = 3;
      /** Constant for {@link #navigation}, value corresponding to the
       * <a href="{@docRoot}guide/topics/resources/providing-resources.html#NavigationQualifier">wheel</a>
       * resource qualifier. */
      public static final int NAVIGATION_WHEEL = 4;
  
      /**
       * The kind of navigation method available on the device.
       * One of: {@link #NAVIGATION_NONAV}, {@link #NAVIGATION_DPAD},
       * {@link #NAVIGATION_TRACKBALL}, {@link #NAVIGATION_WHEEL}.
       */
      public int navigation;
  
      /** Constant for {@link #navigationHidden}: a value indicating that no value has been set. */
      public static final int NAVIGATIONHIDDEN_UNDEFINED = 0;
      /** Constant for {@link #navigationHidden}, value corresponding to the
       * <a href="{@docRoot}guide/topics/resources/providing-resources.html#NavAvailQualifier">navexposed</a>
       * resource qualifier. */
      public static final int NAVIGATIONHIDDEN_NO = 1;
      /** Constant for {@link #navigationHidden}, value corresponding to the
       * <a href="{@docRoot}guide/topics/resources/providing-resources.html#NavAvailQualifier">navhidden</a>
       * resource qualifier. */
      public static final int NAVIGATIONHIDDEN_YES = 2;
  
      /**
       * A flag indicating whether any 5-way or DPAD navigation available.
       * This will be set on a device with a mechanism to hide the navigation
       * controls from the user, when that mechanism is closed.  One of:
       * {@link #NAVIGATIONHIDDEN_NO}, {@link #NAVIGATIONHIDDEN_YES}.
       */
      public int navigationHidden;
  
      /** Constant for {@link #orientation}: a value indicating that no value has been set. */
      public static final int ORIENTATION_UNDEFINED = 0;
      /** Constant for {@link #orientation}, value corresponding to the
       * <a href="{@docRoot}guide/topics/resources/providing-resources.html#OrientationQualifier">port</a>
       * resource qualifier. */
      public static final int ORIENTATION_PORTRAIT = 1;
      /** Constant for {@link #orientation}, value corresponding to the
       * <a href="{@docRoot}guide/topics/resources/providing-resources.html#OrientationQualifier">land</a>
       * resource qualifier. */
      public static final int ORIENTATION_LANDSCAPE = 2;
      /** @deprecated Not currently supported or used. */
      @Deprecated public static final int ORIENTATION_SQUARE = 3;
  
      /**
       * Overall orientation of the screen.  May be one of
       * {@link #ORIENTATION_LANDSCAPE}, {@link #ORIENTATION_PORTRAIT}.
       */
      public int orientation;
  
      /** Constant for {@link #uiMode}: bits that encode the mode type. */
      public static final int UI_MODE_TYPE_MASK = 0x0f;
      /** Constant for {@link #uiMode}: a {@link #UI_MODE_TYPE_MASK}
       * value indicating that no mode type has been set. */
      public static final int UI_MODE_TYPE_UNDEFINED = 0x00;
      /** Constant for {@link #uiMode}: a {@link #UI_MODE_TYPE_MASK}
       * value that corresponds to
       * <a href="{@docRoot}guide/topics/resources/providing-resources.html#UiModeQualifier">no
       * UI mode</a> resource qualifier specified. */
      public static final int UI_MODE_TYPE_NORMAL = 0x01;
      /** Constant for {@link #uiMode}: a {@link #UI_MODE_TYPE_MASK}
       * value that corresponds to the
       * <a href="{@docRoot}guide/topics/resources/providing-resources.html#UiModeQualifier">desk</a>
       * resource qualifier. */
      public static final int UI_MODE_TYPE_DESK = 0x02;
      /** Constant for {@link #uiMode}: a {@link #UI_MODE_TYPE_MASK}
       * value that corresponds to the
       * <a href="{@docRoot}guide/topics/resources/providing-resources.html#UiModeQualifier">car</a>
       * resource qualifier. */
      public static final int UI_MODE_TYPE_CAR = 0x03;
      /** Constant for {@link #uiMode}: a {@link #UI_MODE_TYPE_MASK}
       * value that corresponds to the
       * <a href="{@docRoot}guide/topics/resources/providing-resources.html#UiModeQualifier">television</a>
       * resource qualifier. */
      public static final int UI_MODE_TYPE_TELEVISION = 0x04;
      /** Constant for {@link #uiMode}: a {@link #UI_MODE_TYPE_MASK}
       * value that corresponds to the
       * <a href="{@docRoot}guide/topics/resources/providing-resources.html#UiModeQualifier">appliance</a>
       * resource qualifier. */
      public static final int UI_MODE_TYPE_APPLIANCE = 0x05;
      /** Constant for {@link #uiMode}: a {@link #UI_MODE_TYPE_MASK}
       * value that corresponds to the
       * <a href="{@docRoot}guide/topics/resources/providing-resources.html#UiModeQualifier">watch</a>
       * resource qualifier. */
      public static final int UI_MODE_TYPE_WATCH = 0x06;
      /** Constant for {@link #uiMode}: a {@link #UI_MODE_TYPE_MASK}
       * value that corresponds to the
       * <a href="{@docRoot}guide/topics/resources/providing-resources.html#UiModeQualifier">vrheadset</a>
       * resource qualifier. */
      public static final int UI_MODE_TYPE_VR_HEADSET = 0x07;
  
      /** Constant for {@link #uiMode}: bits that encode the night mode. */
      public static final int UI_MODE_NIGHT_MASK = 0x30;
      /** Constant for {@link #uiMode}: a {@link #UI_MODE_NIGHT_MASK}
       * value indicating that no mode type has been set. */
      public static final int UI_MODE_NIGHT_UNDEFINED = 0x00;
      /** Constant for {@link #uiMode}: a {@link #UI_MODE_NIGHT_MASK}
       * value that corresponds to the
       * <a href="{@docRoot}guide/topics/resources/providing-resources.html#NightQualifier">notnight</a>
       * resource qualifier. */
      public static final int UI_MODE_NIGHT_NO = 0x10;
      /** Constant for {@link #uiMode}: a {@link #UI_MODE_NIGHT_MASK}
       * value that corresponds to the
       * <a href="{@docRoot}guide/topics/resources/providing-resources.html#NightQualifier">night</a>
       * resource qualifier. */
      public static final int UI_MODE_NIGHT_YES = 0x20;
  
      /**
       * Bit mask of the ui mode.  Currently there are two fields:
       * <p>The {@link #UI_MODE_TYPE_MASK} bits define the overall ui mode of the
       * device. They may be one of {@link #UI_MODE_TYPE_UNDEFINED},
       * {@link #UI_MODE_TYPE_NORMAL}, {@link #UI_MODE_TYPE_DESK},
       * {@link #UI_MODE_TYPE_CAR}, {@link #UI_MODE_TYPE_TELEVISION},
       * {@link #UI_MODE_TYPE_APPLIANCE}, {@link #UI_MODE_TYPE_WATCH},
       * or {@link #UI_MODE_TYPE_VR_HEADSET}.
       *
       * <p>The {@link #UI_MODE_NIGHT_MASK} defines whether the screen
       * is in a special mode. They may be one of {@link #UI_MODE_NIGHT_UNDEFINED},
       * {@link #UI_MODE_NIGHT_NO} or {@link #UI_MODE_NIGHT_YES}.
       */
      public int uiMode;
  
      /**
       * Default value for {@link #screenWidthDp} indicating that no width
       * has been specified.
       */
      public static final int SCREEN_WIDTH_DP_UNDEFINED = 0;
  
      /**
       * The current width of the available screen space, in dp units,
       * corresponding to
       * <a href="{@docRoot}guide/topics/resources/providing-resources.html#ScreenWidthQualifier">screen
       * width</a> resource qualifier.  Set to
       * {@link #SCREEN_WIDTH_DP_UNDEFINED} if no width is specified.
       */
      public int screenWidthDp;
  
      /**
       * Default value for {@link #screenHeightDp} indicating that no width
       * has been specified.
       */
      public static final int SCREEN_HEIGHT_DP_UNDEFINED = 0;
  
      /**
       * The current height of the available screen space, in dp units,
       * corresponding to
       * <a href="{@docRoot}guide/topics/resources/providing-resources.html#ScreenHeightQualifier">screen
       * height</a> resource qualifier.  Set to
       * {@link #SCREEN_HEIGHT_DP_UNDEFINED} if no height is specified.
       */
      public int screenHeightDp;
  
      /**
       * Default value for {@link #smallestScreenWidthDp} indicating that no width
       * has been specified.
       */
      public static final int SMALLEST_SCREEN_WIDTH_DP_UNDEFINED = 0;
  
      /**
       * The smallest screen size an application will see in normal operation,
       * corresponding to
       * <a href="{@docRoot}guide/topics/resources/providing-resources.html#SmallestScreenWidthQualifier">smallest
       * screen width</a> resource qualifier.
       * This is the smallest value of both screenWidthDp and screenHeightDp
       * in both portrait and landscape.  Set to
       * {@link #SMALLEST_SCREEN_WIDTH_DP_UNDEFINED} if no width is specified.
       */
      public int smallestScreenWidthDp;
  
      /**
       * Default value for {@link #densityDpi} indicating that no width
       * has been specified.
       */
      public static final int DENSITY_DPI_UNDEFINED = 0;
  
      /**
       * Value for {@link #densityDpi} for resources that scale to any density (vector drawables).
       * {@hide}
       */
      public static final int DENSITY_DPI_ANY = 0xfffe;
  
      /**
       * Value for {@link #densityDpi} for resources that are not meant to be scaled.
       * {@hide}
       */
      public static final int DENSITY_DPI_NONE = 0xffff;
  
      /**
       * The target screen density being rendered to,
       * corresponding to
       * <a href="{@docRoot}guide/topics/resources/providing-resources.html#DensityQualifier">density</a>
       * resource qualifier.  Set to
       * {@link #DENSITY_DPI_UNDEFINED} if no density is specified.
       */
      public int densityDpi;
  
      /** @hide Hack to get this information from WM to app running in compat mode. */
      public int compatScreenWidthDp;
      /** @hide Hack to get this information from WM to app running in compat mode. */
      public int compatScreenHeightDp;
      /** @hide Hack to get this information from WM to app running in compat mode. */
      public int compatSmallestScreenWidthDp;
  
      /**
       * An undefined assetsSeq. This will not override an existing assetsSeq.
       * @hide
       */
      public static final int ASSETS_SEQ_UNDEFINED = 0;
  
      /**
       * Internal counter that allows us to piggyback off the configuration change mechanism to
       * signal to apps that the the assets for an Application have changed. A difference in these
       * between two Configurations will yield a diff flag of
       * {@link ActivityInfo#CONFIG_ASSETS_PATHS}.
       * @hide
       */
      @TestApi
      public int assetsSeq;
  
      /**
       * @hide Internal book-keeping.
       */
      @UnsupportedAppUsage
      public int seq;
  
      /** @hide */
      @IntDef(flag = true, prefix = { "NATIVE_CONFIG_" }, value = {
              NATIVE_CONFIG_MCC,
              NATIVE_CONFIG_MNC,
              NATIVE_CONFIG_LOCALE,
              NATIVE_CONFIG_TOUCHSCREEN,
              NATIVE_CONFIG_KEYBOARD,
              NATIVE_CONFIG_KEYBOARD_HIDDEN,
              NATIVE_CONFIG_NAVIGATION,
              NATIVE_CONFIG_ORIENTATION,
              NATIVE_CONFIG_DENSITY,
              NATIVE_CONFIG_SCREEN_SIZE,
              NATIVE_CONFIG_VERSION,
              NATIVE_CONFIG_SCREEN_LAYOUT,
              NATIVE_CONFIG_UI_MODE,
              NATIVE_CONFIG_SMALLEST_SCREEN_SIZE,
              NATIVE_CONFIG_LAYOUTDIR,
              NATIVE_CONFIG_COLOR_MODE,
      })
      @Retention(RetentionPolicy.SOURCE)
      public @interface NativeConfig {}
  
      /** @hide Native-specific bit mask for MCC config; DO NOT USE UNLESS YOU ARE SURE. */
      public static final int NATIVE_CONFIG_MCC = 0x0001;
      /** @hide Native-specific bit mask for MNC config; DO NOT USE UNLESS YOU ARE SURE. */
      public static final int NATIVE_CONFIG_MNC = 0x0002;
      /** @hide Native-specific bit mask for LOCALE config; DO NOT USE UNLESS YOU ARE SURE. */
      public static final int NATIVE_CONFIG_LOCALE = 0x0004;
      /** @hide Native-specific bit mask for TOUCHSCREEN config; DO NOT USE UNLESS YOU ARE SURE. */
      public static final int NATIVE_CONFIG_TOUCHSCREEN = 0x0008;
      /** @hide Native-specific bit mask for KEYBOARD config; DO NOT USE UNLESS YOU ARE SURE. */
      public static final int NATIVE_CONFIG_KEYBOARD = 0x0010;
      /** @hide Native-specific bit mask for KEYBOARD_HIDDEN config; DO NOT USE UNLESS YOU
       * ARE SURE. */
      public static final int NATIVE_CONFIG_KEYBOARD_HIDDEN = 0x0020;
      /** @hide Native-specific bit mask for NAVIGATION config; DO NOT USE UNLESS YOU ARE SURE. */
      public static final int NATIVE_CONFIG_NAVIGATION = 0x0040;
      /** @hide Native-specific bit mask for ORIENTATION config; DO NOT USE UNLESS YOU ARE SURE. */
      public static final int NATIVE_CONFIG_ORIENTATION = 0x0080;
      /** @hide Native-specific bit mask for DENSITY config; DO NOT USE UNLESS YOU ARE SURE. */
      public static final int NATIVE_CONFIG_DENSITY = 0x0100;
      /** @hide Native-specific bit mask for SCREEN_SIZE config; DO NOT USE UNLESS YOU ARE SURE. */
      public static final int NATIVE_CONFIG_SCREEN_SIZE = 0x0200;
      /** @hide Native-specific bit mask for VERSION config; DO NOT USE UNLESS YOU ARE SURE. */
      public static final int NATIVE_CONFIG_VERSION = 0x0400;
      /** @hide Native-specific bit mask for SCREEN_LAYOUT config; DO NOT USE UNLESS YOU ARE SURE. */
      public static final int NATIVE_CONFIG_SCREEN_LAYOUT = 0x0800;
      /** @hide Native-specific bit mask for UI_MODE config; DO NOT USE UNLESS YOU ARE SURE. */
      public static final int NATIVE_CONFIG_UI_MODE = 0x1000;
      /** @hide Native-specific bit mask for SMALLEST_SCREEN_SIZE config; DO NOT USE UNLESS YOU
       * ARE SURE. */
      public static final int NATIVE_CONFIG_SMALLEST_SCREEN_SIZE = 0x2000;
      /** @hide Native-specific bit mask for LAYOUTDIR config ; DO NOT USE UNLESS YOU ARE SURE.*/
      public static final int NATIVE_CONFIG_LAYOUTDIR = 0x4000;
      /** @hide Native-specific bit mask for COLOR_MODE config ; DO NOT USE UNLESS YOU ARE SURE.*/
      public static final int NATIVE_CONFIG_COLOR_MODE = 0x10000;
  
      /**
       * <p>Construct an invalid Configuration. This state is only suitable for constructing a
       * Configuration delta that will be applied to some valid Configuration object. In order to
       * create a valid standalone Configuration, you must call {@link #setToDefaults}. </p>
       *
       * <p>Example:</p>
       * <pre class="prettyprint">
       *     Configuration validConfig = new Configuration();
       *     validConfig.setToDefaults();
       *
       *     Configuration deltaOnlyConfig = new Configuration();
       *     deltaOnlyConfig.orientation = Configuration.ORIENTATION_LANDSCAPE;
       *
       *     validConfig.updateFrom(deltaOnlyConfig);
       * </pre>
       */
      public Configuration() {
          unset();
      }
  
      /**
       * Makes a deep copy suitable for modification.
       */
      public Configuration(Configuration o) {
          setTo(o);
      }
  
      /* This brings mLocaleList in sync with locale in case a user of the older API who doesn't know
       * about setLocales() has changed locale directly. */
      private void fixUpLocaleList() {
          if ((locale == null && !mLocaleList.isEmpty()) ||
                  (locale != null && !locale.equals(mLocaleList.get(0)))) {
              mLocaleList = locale == null ? LocaleList.getEmptyLocaleList() : new LocaleList(locale);
          }
      }
  
      /**
       * Sets the fields in this object to those in the given Configuration.
       *
       * @param o The Configuration object used to set the values of this Configuration's fields.
       */
      public void setTo(Configuration o) {
          fontScale = o.fontScale;
          mcc = o.mcc;
          mnc = o.mnc;
          locale = o.locale == null ? null : (Locale) o.locale.clone();
          o.fixUpLocaleList();
          mLocaleList = o.mLocaleList;
          userSetLocale = o.userSetLocale;
          touchscreen = o.touchscreen;
          keyboard = o.keyboard;
          keyboardHidden = o.keyboardHidden;
          hardKeyboardHidden = o.hardKeyboardHidden;
          navigation = o.navigation;
          navigationHidden = o.navigationHidden;
          orientation = o.orientation;
          screenLayout = o.screenLayout;
          colorMode = o.colorMode;
          uiMode = o.uiMode;
          screenWidthDp = o.screenWidthDp;
          screenHeightDp = o.screenHeightDp;
          smallestScreenWidthDp = o.smallestScreenWidthDp;
          densityDpi = o.densityDpi;
          compatScreenWidthDp = o.compatScreenWidthDp;
          compatScreenHeightDp = o.compatScreenHeightDp;
          compatSmallestScreenWidthDp = o.compatSmallestScreenWidthDp;
          assetsSeq = o.assetsSeq;
          seq = o.seq;
          windowConfiguration.setTo(o.windowConfiguration);
      }
  
      public String toString() {
          StringBuilder sb = new StringBuilder(128);
          sb.append("{");
          sb.append(fontScale);
          sb.append(" ");
          if (mcc != 0) {
              sb.append(mcc);
              sb.append("mcc");
          } else {
              sb.append("?mcc");
          }
          if (mnc != 0) {
              sb.append(mnc);
              sb.append("mnc");
          } else {
              sb.append("?mnc");
          }
          fixUpLocaleList();
          if (!mLocaleList.isEmpty()) {
              sb.append(" ");
              sb.append(mLocaleList);
          } else {
              sb.append(" ?localeList");
          }
          int layoutDir = (screenLayout&SCREENLAYOUT_LAYOUTDIR_MASK);
          switch (layoutDir) {
              case SCREENLAYOUT_LAYOUTDIR_UNDEFINED: sb.append(" ?layoutDir"); break;
              case SCREENLAYOUT_LAYOUTDIR_LTR: sb.append(" ldltr"); break;
              case SCREENLAYOUT_LAYOUTDIR_RTL: sb.append(" ldrtl"); break;
              default: sb.append(" layoutDir=");
                  sb.append(layoutDir >> SCREENLAYOUT_LAYOUTDIR_SHIFT); break;
          }
          if (smallestScreenWidthDp != SMALLEST_SCREEN_WIDTH_DP_UNDEFINED) {
              sb.append(" sw"); sb.append(smallestScreenWidthDp); sb.append("dp");
          } else {
              sb.append(" ?swdp");
          }
          if (screenWidthDp != SCREEN_WIDTH_DP_UNDEFINED) {
              sb.append(" w"); sb.append(screenWidthDp); sb.append("dp");
          } else {
              sb.append(" ?wdp");
          }
          if (screenHeightDp != SCREEN_HEIGHT_DP_UNDEFINED) {
              sb.append(" h"); sb.append(screenHeightDp); sb.append("dp");
          } else {
              sb.append(" ?hdp");
          }
          if (densityDpi != DENSITY_DPI_UNDEFINED) {
              sb.append(" "); sb.append(densityDpi); sb.append("dpi");
          } else {
              sb.append(" ?density");
          }
          switch ((screenLayout&SCREENLAYOUT_SIZE_MASK)) {
              case SCREENLAYOUT_SIZE_UNDEFINED: sb.append(" ?lsize"); break;
              case SCREENLAYOUT_SIZE_SMALL: sb.append(" smll"); break;
              case SCREENLAYOUT_SIZE_NORMAL: sb.append(" nrml"); break;
              case SCREENLAYOUT_SIZE_LARGE: sb.append(" lrg"); break;
              case SCREENLAYOUT_SIZE_XLARGE: sb.append(" xlrg"); break;
              default: sb.append(" layoutSize=");
                      sb.append(screenLayout&SCREENLAYOUT_SIZE_MASK); break;
          }
          switch ((screenLayout&SCREENLAYOUT_LONG_MASK)) {
              case SCREENLAYOUT_LONG_UNDEFINED: sb.append(" ?long"); break;
              case SCREENLAYOUT_LONG_NO: /* not-long is not interesting to print */ break;
              case SCREENLAYOUT_LONG_YES: sb.append(" long"); break;
              default: sb.append(" layoutLong=");
                      sb.append(screenLayout&SCREENLAYOUT_LONG_MASK); break;
          }
          switch ((colorMode &COLOR_MODE_HDR_MASK)) {
              case COLOR_MODE_HDR_UNDEFINED: sb.append(" ?ldr"); break; // most likely not HDR
              case COLOR_MODE_HDR_NO: /* ldr is not interesting to print */ break;
              case COLOR_MODE_HDR_YES: sb.append(" hdr"); break;
              default: sb.append(" dynamicRange=");
                  sb.append(colorMode &COLOR_MODE_HDR_MASK); break;
          }
          switch ((colorMode &COLOR_MODE_WIDE_COLOR_GAMUT_MASK)) {
              case COLOR_MODE_WIDE_COLOR_GAMUT_UNDEFINED: sb.append(" ?wideColorGamut"); break;
              case COLOR_MODE_WIDE_COLOR_GAMUT_NO: /* not wide is not interesting to print */ break;
              case COLOR_MODE_WIDE_COLOR_GAMUT_YES: sb.append(" widecg"); break;
              default: sb.append(" wideColorGamut=");
                  sb.append(colorMode &COLOR_MODE_WIDE_COLOR_GAMUT_MASK); break;
          }
          switch (orientation) {
              case ORIENTATION_UNDEFINED: sb.append(" ?orien"); break;
              case ORIENTATION_LANDSCAPE: sb.append(" land"); break;
              case ORIENTATION_PORTRAIT: sb.append(" port"); break;
              default: sb.append(" orien="); sb.append(orientation); break;
          }
          switch ((uiMode&UI_MODE_TYPE_MASK)) {
              case UI_MODE_TYPE_UNDEFINED: sb.append(" ?uimode"); break;
              case UI_MODE_TYPE_NORMAL: /* normal is not interesting to print */ break;
              case UI_MODE_TYPE_DESK: sb.append(" desk"); break;
              case UI_MODE_TYPE_CAR: sb.append(" car"); break;
              case UI_MODE_TYPE_TELEVISION: sb.append(" television"); break;
              case UI_MODE_TYPE_APPLIANCE: sb.append(" appliance"); break;
              case UI_MODE_TYPE_WATCH: sb.append(" watch"); break;
              case UI_MODE_TYPE_VR_HEADSET: sb.append(" vrheadset"); break;
              default: sb.append(" uimode="); sb.append(uiMode&UI_MODE_TYPE_MASK); break;
          }
          switch ((uiMode&UI_MODE_NIGHT_MASK)) {
              case UI_MODE_NIGHT_UNDEFINED: sb.append(" ?night"); break;
              case UI_MODE_NIGHT_NO: /* not-night is not interesting to print */ break;
              case UI_MODE_NIGHT_YES: sb.append(" night"); break;
              default: sb.append(" night="); sb.append(uiMode&UI_MODE_NIGHT_MASK); break;
          }
          switch (touchscreen) {
              case TOUCHSCREEN_UNDEFINED: sb.append(" ?touch"); break;
              case TOUCHSCREEN_NOTOUCH: sb.append(" -touch"); break;
              case TOUCHSCREEN_STYLUS: sb.append(" stylus"); break;
              case TOUCHSCREEN_FINGER: sb.append(" finger"); break;
              default: sb.append(" touch="); sb.append(touchscreen); break;
          }
          switch (keyboard) {
              case KEYBOARD_UNDEFINED: sb.append(" ?keyb"); break;
              case KEYBOARD_NOKEYS: sb.append(" -keyb"); break;
              case KEYBOARD_QWERTY: sb.append(" qwerty"); break;
              case KEYBOARD_12KEY: sb.append(" 12key"); break;
              default: sb.append(" keys="); sb.append(keyboard); break;
          }
          switch (keyboardHidden) {
              case KEYBOARDHIDDEN_UNDEFINED: sb.append("/?"); break;
              case KEYBOARDHIDDEN_NO: sb.append("/v"); break;
              case KEYBOARDHIDDEN_YES: sb.append("/h"); break;
              case KEYBOARDHIDDEN_SOFT: sb.append("/s"); break;
              default: sb.append("/"); sb.append(keyboardHidden); break;
          }
          switch (hardKeyboardHidden) {
              case HARDKEYBOARDHIDDEN_UNDEFINED: sb.append("/?"); break;
              case HARDKEYBOARDHIDDEN_NO: sb.append("/v"); break;
              case HARDKEYBOARDHIDDEN_YES: sb.append("/h"); break;
              default: sb.append("/"); sb.append(hardKeyboardHidden); break;
          }
          switch (navigation) {
              case NAVIGATION_UNDEFINED: sb.append(" ?nav"); break;
              case NAVIGATION_NONAV: sb.append(" -nav"); break;
              case NAVIGATION_DPAD: sb.append(" dpad"); break;
              case NAVIGATION_TRACKBALL: sb.append(" tball"); break;
              case NAVIGATION_WHEEL: sb.append(" wheel"); break;
              default: sb.append(" nav="); sb.append(navigation); break;
          }
          switch (navigationHidden) {
              case NAVIGATIONHIDDEN_UNDEFINED: sb.append("/?"); break;
              case NAVIGATIONHIDDEN_NO: sb.append("/v"); break;
              case NAVIGATIONHIDDEN_YES: sb.append("/h"); break;
              default: sb.append("/"); sb.append(navigationHidden); break;
          }
          sb.append(" winConfig="); sb.append(windowConfiguration);
          if (assetsSeq != 0) {
              sb.append(" as.").append(assetsSeq);
          }
          if (seq != 0) {
              sb.append(" s.").append(seq);
          }
          sb.append('}');
          return sb.toString();
      }
  
      /**
       * Write to a protocol buffer output stream.
       * Protocol buffer message definition at {@link android.content.ConfigurationProto}
       * Has the option to ignore fields that don't need to be persisted to disk.
       *
       * @param protoOutputStream Stream to write the Configuration object to.
       * @param fieldId           Field Id of the Configuration as defined in the parent message
       * @param persisted         Note if this proto will be persisted to disk
       * @param critical          If true, reduce amount of data written.
       * @hide
       */
      public void writeToProto(ProtoOutputStream protoOutputStream, long fieldId, boolean persisted,
              boolean critical) {
          final long token = protoOutputStream.start(fieldId);
          if (!critical) {
              protoOutputStream.write(FONT_SCALE, fontScale);
              protoOutputStream.write(MCC, mcc);
              protoOutputStream.write(MNC, mnc);
              if (mLocaleList != null) {
                  protoOutputStream.write(LOCALE_LIST, mLocaleList.toLanguageTags());
              }
              protoOutputStream.write(SCREEN_LAYOUT, screenLayout);
              protoOutputStream.write(COLOR_MODE, colorMode);
              protoOutputStream.write(TOUCHSCREEN, touchscreen);
              protoOutputStream.write(KEYBOARD, keyboard);
              protoOutputStream.write(KEYBOARD_HIDDEN, keyboardHidden);
              protoOutputStream.write(HARD_KEYBOARD_HIDDEN, hardKeyboardHidden);
              protoOutputStream.write(NAVIGATION, navigation);
              protoOutputStream.write(NAVIGATION_HIDDEN, navigationHidden);
              protoOutputStream.write(UI_MODE, uiMode);
              protoOutputStream.write(SMALLEST_SCREEN_WIDTH_DP, smallestScreenWidthDp);
              protoOutputStream.write(DENSITY_DPI, densityDpi);
              // For persistence, we do not care about window configuration
              if (!persisted && windowConfiguration != null) {
                  windowConfiguration.writeToProto(protoOutputStream, WINDOW_CONFIGURATION);
              }
          }
          protoOutputStream.write(ORIENTATION, orientation);
          protoOutputStream.write(SCREEN_WIDTH_DP, screenWidthDp);
          protoOutputStream.write(SCREEN_HEIGHT_DP, screenHeightDp);
          protoOutputStream.end(token);
      }
  
      /**
       * Write to a protocol buffer output stream.
       * Protocol buffer message definition at {@link android.content.ConfigurationProto}
       *
       * @param protoOutputStream Stream to write the Configuration object to.
       * @param fieldId           Field Id of the Configuration as defined in the parent message
       * @hide
       */
      public void writeToProto(ProtoOutputStream protoOutputStream, long fieldId) {
          writeToProto(protoOutputStream, fieldId, false /* persisted */, false /* critical */);
      }
  
      /**
       * Write to a protocol buffer output stream.
       * Protocol buffer message definition at {@link android.content.ConfigurationProto}
       *
       * @param protoOutputStream Stream to write the Configuration object to.
       * @param fieldId           Field Id of the Configuration as defined in the parent message
       * @param critical          If true, reduce amount of data written.
       * @hide
       */
      public void writeToProto(ProtoOutputStream protoOutputStream, long fieldId, boolean critical) {
          writeToProto(protoOutputStream, fieldId, false /* persisted */, critical);
      }
  
      /**
       * Read from a protocol buffer output stream.
       * Protocol buffer message definition at {@link android.content.ConfigurationProto}
       *
       * @param protoInputStream Stream to read the Configuration object from.
       * @param fieldId          Field Id of the Configuration as defined in the parent message
       * @hide
       */
      public void readFromProto(ProtoInputStream protoInputStream, long fieldId) throws IOException {
          final long token = protoInputStream.start(fieldId);
          final List<Locale> list = new ArrayList();
          try {
              while (protoInputStream.nextField() != ProtoInputStream.NO_MORE_FIELDS) {
                  switch (protoInputStream.getFieldNumber()) {
                      case (int) FONT_SCALE:
                          fontScale = protoInputStream.readFloat(FONT_SCALE);
                          break;
                      case (int) MCC:
                          mcc = protoInputStream.readInt(MCC);
                          break;
                      case (int) MNC:
                          mnc = protoInputStream.readInt(MNC);
                          break;
                      case (int) LOCALES:
                          // Parse the Locale here to handle all the repeated Locales
                          // The LocaleList will be created when the message is completed
                          final long localeToken = protoInputStream.start(LOCALES);
                          String language = "";
                          String country = "";
                          String variant = "";
                          String script = "";
                          try {
                              while (protoInputStream.nextField()
                                      != ProtoInputStream.NO_MORE_FIELDS) {
                                  switch (protoInputStream.getFieldNumber()) {
                                      case (int) LocaleProto.LANGUAGE:
                                          language = protoInputStream.readString(
                                                  LocaleProto.LANGUAGE);
                                          break;
                                      case (int) LocaleProto.COUNTRY:
                                          country = protoInputStream.readString(LocaleProto.COUNTRY);
                                          break;
                                      case (int) LocaleProto.VARIANT:
                                          variant = protoInputStream.readString(LocaleProto.VARIANT);
                                          break;
                                      case (int) LocaleProto.SCRIPT:
                                          script = protoInputStream.readString(LocaleProto.SCRIPT);
                                          break;
                                  }
                              }
                          } catch (WireTypeMismatchException wtme) {
                              // rethrow for caller deal with
                              throw wtme;
                          } finally {
                              protoInputStream.end(localeToken);
                              try {
                                  final Locale locale = new Locale.Builder()
                                                          .setLanguage(language)
                                                          .setRegion(country)
                                                          .setVariant(variant)
                                                          .setScript(script)
                                                          .build();
                                  // Log a WTF here if a repeated locale is found to avoid throwing an
                                  // exception in system server when LocaleList is created below
                                  final int inListIndex = list.indexOf(locale);
                                  if (inListIndex != -1) {
                                      Slog.wtf(TAG, "Repeated locale (" + list.get(inListIndex) + ")"
                                              + " found when trying to add: " + locale.toString());
                                  } else {
                                      list.add(locale);
                                  }
                              } catch (IllformedLocaleException e) {
                                  Slog.e(TAG, "readFromProto error building locale with: "
                                          + "language-" + language + ";country-" + country
                                          + ";variant-" + variant + ";script-" + script);
                              }
                          }
                          break;
                      case (int) SCREEN_LAYOUT:
                          screenLayout = protoInputStream.readInt(SCREEN_LAYOUT);
                          break;
                      case (int) COLOR_MODE:
                          colorMode = protoInputStream.readInt(COLOR_MODE);
                          break;
                      case (int) TOUCHSCREEN:
                          touchscreen = protoInputStream.readInt(TOUCHSCREEN);
                          break;
                      case (int) KEYBOARD:
                          keyboard = protoInputStream.readInt(KEYBOARD);
                          break;
                      case (int) KEYBOARD_HIDDEN:
                          keyboardHidden = protoInputStream.readInt(KEYBOARD_HIDDEN);
                          break;
                      case (int) HARD_KEYBOARD_HIDDEN:
                          hardKeyboardHidden = protoInputStream.readInt(HARD_KEYBOARD_HIDDEN);
                          break;
                      case (int) NAVIGATION:
                          navigation = protoInputStream.readInt(NAVIGATION);
                          break;
                      case (int) NAVIGATION_HIDDEN:
                          navigationHidden = protoInputStream.readInt(NAVIGATION_HIDDEN);
                          break;
                      case (int) ORIENTATION:
                          orientation = protoInputStream.readInt(ORIENTATION);
                          break;
                      case (int) UI_MODE:
                          uiMode = protoInputStream.readInt(UI_MODE);
                          break;
                      case (int) SCREEN_WIDTH_DP:
                          screenWidthDp = protoInputStream.readInt(SCREEN_WIDTH_DP);
                          break;
                      case (int) SCREEN_HEIGHT_DP:
                          screenHeightDp = protoInputStream.readInt(SCREEN_HEIGHT_DP);
                          break;
                      case (int) SMALLEST_SCREEN_WIDTH_DP:
                          smallestScreenWidthDp = protoInputStream.readInt(SMALLEST_SCREEN_WIDTH_DP);
                          break;
                      case (int) DENSITY_DPI:
                          densityDpi = protoInputStream.readInt(DENSITY_DPI);
                          break;
                      case (int) WINDOW_CONFIGURATION:
                          windowConfiguration.readFromProto(protoInputStream, WINDOW_CONFIGURATION);
                          break;
                      case (int) LOCALE_LIST:
                          try {
                              setLocales(LocaleList.forLanguageTags(protoInputStream.readString(
                                      LOCALE_LIST)));
                          } catch (Exception e) {
                              Slog.e(TAG, "error parsing locale list in configuration.", e);
                          }
                          break;
                  }
              }
          } finally {
              // Let caller handle any exceptions
              if (list.size() > 0) {
                  //Create the LocaleList from the collected Locales
                  setLocales(new LocaleList(list.toArray(new Locale[list.size()])));
              }
              protoInputStream.end(token);
          }
      }
  
      /**
       * Write full {@link android.content.ResourcesConfigurationProto} to protocol buffer output
       * stream.
       *
       * @param protoOutputStream Stream to write the Configuration object to.
       * @param fieldId           Field Id of the Configuration as defined in the parent message
       * @param metrics           Current display information
       * @hide
       */
      public void writeResConfigToProto(ProtoOutputStream protoOutputStream, long fieldId,
              DisplayMetrics metrics) {
          final int width, height;
          if (metrics.widthPixels >= metrics.heightPixels) {
              width = metrics.widthPixels;
              height = metrics.heightPixels;
          } else {
              //noinspection SuspiciousNameCombination
              width = metrics.heightPixels;
              //noinspection SuspiciousNameCombination
              height = metrics.widthPixels;
          }
  
          final long token = protoOutputStream.start(fieldId);
          writeToProto(protoOutputStream, CONFIGURATION);
          protoOutputStream.write(SDK_VERSION, Build.VERSION.RESOURCES_SDK_INT);
          protoOutputStream.write(SCREEN_WIDTH_PX, width);
          protoOutputStream.write(SCREEN_HEIGHT_PX, height);
          protoOutputStream.end(token);
      }
  
      /**
       * Convert the UI mode to a human readable format.
       * @hide
       */
      public static String uiModeToString(int uiMode) {
          switch (uiMode) {
              case UI_MODE_TYPE_UNDEFINED:
                  return "UI_MODE_TYPE_UNDEFINED";
              case UI_MODE_TYPE_NORMAL:
                  return "UI_MODE_TYPE_NORMAL";
              case UI_MODE_TYPE_DESK:
                  return "UI_MODE_TYPE_DESK";
              case UI_MODE_TYPE_CAR:
                  return "UI_MODE_TYPE_CAR";
              case UI_MODE_TYPE_TELEVISION:
                  return "UI_MODE_TYPE_TELEVISION";
              case UI_MODE_TYPE_APPLIANCE:
                  return "UI_MODE_TYPE_APPLIANCE";
              case UI_MODE_TYPE_WATCH:
                  return "UI_MODE_TYPE_WATCH";
              case UI_MODE_TYPE_VR_HEADSET:
                  return "UI_MODE_TYPE_VR_HEADSET";
              default:
                  return Integer.toString(uiMode);
          }
      }
  
      /**
       * Set this object to the system defaults.
       */
      public void setToDefaults() {
          fontScale = 1;
          mcc = mnc = 0;
          mLocaleList = LocaleList.getEmptyLocaleList();
          locale = null;
          userSetLocale = false;
          touchscreen = TOUCHSCREEN_UNDEFINED;
          keyboard = KEYBOARD_UNDEFINED;
          keyboardHidden = KEYBOARDHIDDEN_UNDEFINED;
          hardKeyboardHidden = HARDKEYBOARDHIDDEN_UNDEFINED;
          navigation = NAVIGATION_UNDEFINED;
          navigationHidden = NAVIGATIONHIDDEN_UNDEFINED;
          orientation = ORIENTATION_UNDEFINED;
          screenLayout = SCREENLAYOUT_UNDEFINED;
          colorMode = COLOR_MODE_UNDEFINED;
          uiMode = UI_MODE_TYPE_UNDEFINED;
          screenWidthDp = compatScreenWidthDp = SCREEN_WIDTH_DP_UNDEFINED;
          screenHeightDp = compatScreenHeightDp = SCREEN_HEIGHT_DP_UNDEFINED;
          smallestScreenWidthDp = compatSmallestScreenWidthDp = SMALLEST_SCREEN_WIDTH_DP_UNDEFINED;
          densityDpi = DENSITY_DPI_UNDEFINED;
          assetsSeq = ASSETS_SEQ_UNDEFINED;
          seq = 0;
          windowConfiguration.setToDefaults();
      }
  
      /**
       * Set this object to completely undefined.
       * @hide
       */
      public void unset() {
          setToDefaults();
          fontScale = 0;
      }
  
      /** {@hide} */
      @UnsupportedAppUsage
      @Deprecated public void makeDefault() {
          setToDefaults();
      }
  
      /**
       * Copies the fields from delta into this Configuration object, keeping
       * track of which ones have changed. Any undefined fields in {@code delta}
       * are ignored and not copied in to the current Configuration.
       *
       * @return a bit mask of the changed fields, as per {@link #diff}
       */
      public @Config int updateFrom(@NonNull Configuration delta) {
          int changed = 0;
          if (delta.fontScale > 0 && fontScale != delta.fontScale) {
              changed |= ActivityInfo.CONFIG_FONT_SCALE;
              fontScale = delta.fontScale;
          }
          if (delta.mcc != 0 && mcc != delta.mcc) {
              changed |= ActivityInfo.CONFIG_MCC;
              mcc = delta.mcc;
          }
          if (delta.mnc != 0 && mnc != delta.mnc) {
              changed |= ActivityInfo.CONFIG_MNC;
              mnc = delta.mnc;
          }
          fixUpLocaleList();
          delta.fixUpLocaleList();
          if (!delta.mLocaleList.isEmpty() && !mLocaleList.equals(delta.mLocaleList)) {
              changed |= ActivityInfo.CONFIG_LOCALE;
              mLocaleList = delta.mLocaleList;
              // delta.locale can't be null, since delta.mLocaleList is not empty.
              if (!delta.locale.equals(locale)) {
                  locale = (Locale) delta.locale.clone();
                  // If locale has changed, then layout direction is also changed ...
                  changed |= ActivityInfo.CONFIG_LAYOUT_DIRECTION;
                  // ... and we need to update the layout direction (represented by the first
                  // 2 most significant bits in screenLayout).
                  setLayoutDirection(locale);
              }
          }
          final int deltaScreenLayoutDir = delta.screenLayout & SCREENLAYOUT_LAYOUTDIR_MASK;
          if (deltaScreenLayoutDir != SCREENLAYOUT_LAYOUTDIR_UNDEFINED &&
                  deltaScreenLayoutDir != (screenLayout & SCREENLAYOUT_LAYOUTDIR_MASK)) {
              screenLayout = (screenLayout & ~SCREENLAYOUT_LAYOUTDIR_MASK) | deltaScreenLayoutDir;
              changed |= ActivityInfo.CONFIG_LAYOUT_DIRECTION;
          }
          if (delta.userSetLocale && (!userSetLocale || ((changed & ActivityInfo.CONFIG_LOCALE) != 0)))
          {
              changed |= ActivityInfo.CONFIG_LOCALE;
              userSetLocale = true;
          }
          if (delta.touchscreen != TOUCHSCREEN_UNDEFINED
                  && touchscreen != delta.touchscreen) {
              changed |= ActivityInfo.CONFIG_TOUCHSCREEN;
              touchscreen = delta.touchscreen;
          }
          if (delta.keyboard != KEYBOARD_UNDEFINED
                  && keyboard != delta.keyboard) {
              changed |= ActivityInfo.CONFIG_KEYBOARD;
              keyboard = delta.keyboard;
          }
          if (delta.keyboardHidden != KEYBOARDHIDDEN_UNDEFINED
                  && keyboardHidden != delta.keyboardHidden) {
              changed |= ActivityInfo.CONFIG_KEYBOARD_HIDDEN;
              keyboardHidden = delta.keyboardHidden;
          }
          if (delta.hardKeyboardHidden != HARDKEYBOARDHIDDEN_UNDEFINED
                  && hardKeyboardHidden != delta.hardKeyboardHidden) {
              changed |= ActivityInfo.CONFIG_KEYBOARD_HIDDEN;
              hardKeyboardHidden = delta.hardKeyboardHidden;
          }
          if (delta.navigation != NAVIGATION_UNDEFINED
                  && navigation != delta.navigation) {
              changed |= ActivityInfo.CONFIG_NAVIGATION;
              navigation = delta.navigation;
          }
          if (delta.navigationHidden != NAVIGATIONHIDDEN_UNDEFINED
                  && navigationHidden != delta.navigationHidden) {
              changed |= ActivityInfo.CONFIG_KEYBOARD_HIDDEN;
              navigationHidden = delta.navigationHidden;
          }
          if (delta.orientation != ORIENTATION_UNDEFINED
                  && orientation != delta.orientation) {
              changed |= ActivityInfo.CONFIG_ORIENTATION;
              orientation = delta.orientation;
          }
          if (((delta.screenLayout & SCREENLAYOUT_SIZE_MASK) != SCREENLAYOUT_SIZE_UNDEFINED)
                  && (delta.screenLayout & SCREENLAYOUT_SIZE_MASK)
                  != (screenLayout & SCREENLAYOUT_SIZE_MASK)) {
              changed |= ActivityInfo.CONFIG_SCREEN_LAYOUT;
              screenLayout = (screenLayout & ~SCREENLAYOUT_SIZE_MASK)
                      | (delta.screenLayout & SCREENLAYOUT_SIZE_MASK);
          }
          if (((delta.screenLayout & SCREENLAYOUT_LONG_MASK) != SCREENLAYOUT_LONG_UNDEFINED)
                  && (delta.screenLayout & SCREENLAYOUT_LONG_MASK)
                  != (screenLayout & SCREENLAYOUT_LONG_MASK)) {
              changed |= ActivityInfo.CONFIG_SCREEN_LAYOUT;
              screenLayout = (screenLayout & ~SCREENLAYOUT_LONG_MASK)
                      | (delta.screenLayout & SCREENLAYOUT_LONG_MASK);
          }
          if (((delta.screenLayout & SCREENLAYOUT_ROUND_MASK) != SCREENLAYOUT_ROUND_UNDEFINED)
                  && (delta.screenLayout & SCREENLAYOUT_ROUND_MASK)
                  != (screenLayout & SCREENLAYOUT_ROUND_MASK)) {
              changed |= ActivityInfo.CONFIG_SCREEN_LAYOUT;
              screenLayout = (screenLayout & ~SCREENLAYOUT_ROUND_MASK)
                      | (delta.screenLayout & SCREENLAYOUT_ROUND_MASK);
          }
          if ((delta.screenLayout & SCREENLAYOUT_COMPAT_NEEDED)
                  != (screenLayout & SCREENLAYOUT_COMPAT_NEEDED)
                  && delta.screenLayout != 0) {
              changed |= ActivityInfo.CONFIG_SCREEN_LAYOUT;
              screenLayout = (screenLayout & ~SCREENLAYOUT_COMPAT_NEEDED)
                  | (delta.screenLayout & SCREENLAYOUT_COMPAT_NEEDED);
          }
  
          if (((delta.colorMode & COLOR_MODE_WIDE_COLOR_GAMUT_MASK) !=
                       COLOR_MODE_WIDE_COLOR_GAMUT_UNDEFINED)
                  && (delta.colorMode & COLOR_MODE_WIDE_COLOR_GAMUT_MASK)
                  != (colorMode & COLOR_MODE_WIDE_COLOR_GAMUT_MASK)) {
              changed |= ActivityInfo.CONFIG_COLOR_MODE;
              colorMode = (colorMode & ~COLOR_MODE_WIDE_COLOR_GAMUT_MASK)
                      | (delta.colorMode & COLOR_MODE_WIDE_COLOR_GAMUT_MASK);
          }
  
          if (((delta.colorMode & COLOR_MODE_HDR_MASK) != COLOR_MODE_HDR_UNDEFINED)
                  && (delta.colorMode & COLOR_MODE_HDR_MASK)
                  != (colorMode & COLOR_MODE_HDR_MASK)) {
              changed |= ActivityInfo.CONFIG_COLOR_MODE;
              colorMode = (colorMode & ~COLOR_MODE_HDR_MASK)
                      | (delta.colorMode & COLOR_MODE_HDR_MASK);
          }
  
          if (delta.uiMode != (UI_MODE_TYPE_UNDEFINED|UI_MODE_NIGHT_UNDEFINED)
                  && uiMode != delta.uiMode) {
              changed |= ActivityInfo.CONFIG_UI_MODE;
              if ((delta.uiMode&UI_MODE_TYPE_MASK) != UI_MODE_TYPE_UNDEFINED) {
                  uiMode = (uiMode&~UI_MODE_TYPE_MASK)
                          | (delta.uiMode&UI_MODE_TYPE_MASK);
              }
              if ((delta.uiMode&UI_MODE_NIGHT_MASK) != UI_MODE_NIGHT_UNDEFINED) {
                  uiMode = (uiMode&~UI_MODE_NIGHT_MASK)
                          | (delta.uiMode&UI_MODE_NIGHT_MASK);
              }
          }
          if (delta.screenWidthDp != SCREEN_WIDTH_DP_UNDEFINED
                  && screenWidthDp != delta.screenWidthDp) {
              changed |= ActivityInfo.CONFIG_SCREEN_SIZE;
              screenWidthDp = delta.screenWidthDp;
          }
          if (delta.screenHeightDp != SCREEN_HEIGHT_DP_UNDEFINED
                  && screenHeightDp != delta.screenHeightDp) {
              changed |= ActivityInfo.CONFIG_SCREEN_SIZE;
              screenHeightDp = delta.screenHeightDp;
          }
          if (delta.smallestScreenWidthDp != SMALLEST_SCREEN_WIDTH_DP_UNDEFINED
                  && smallestScreenWidthDp != delta.smallestScreenWidthDp) {
              changed |= ActivityInfo.CONFIG_SMALLEST_SCREEN_SIZE;
              smallestScreenWidthDp = delta.smallestScreenWidthDp;
          }
          if (delta.densityDpi != DENSITY_DPI_UNDEFINED &&
                  densityDpi != delta.densityDpi) {
              changed |= ActivityInfo.CONFIG_DENSITY;
              densityDpi = delta.densityDpi;
          }
          if (delta.compatScreenWidthDp != SCREEN_WIDTH_DP_UNDEFINED) {
              compatScreenWidthDp = delta.compatScreenWidthDp;
          }
          if (delta.compatScreenHeightDp != SCREEN_HEIGHT_DP_UNDEFINED) {
              compatScreenHeightDp = delta.compatScreenHeightDp;
          }
          if (delta.compatSmallestScreenWidthDp != SMALLEST_SCREEN_WIDTH_DP_UNDEFINED) {
              compatSmallestScreenWidthDp = delta.compatSmallestScreenWidthDp;
          }
          if (delta.assetsSeq != ASSETS_SEQ_UNDEFINED && delta.assetsSeq != assetsSeq) {
              changed |= ActivityInfo.CONFIG_ASSETS_PATHS;
              assetsSeq = delta.assetsSeq;
          }
          if (delta.seq != 0) {
              seq = delta.seq;
          }
          if (windowConfiguration.updateFrom(delta.windowConfiguration) != 0) {
              changed |= ActivityInfo.CONFIG_WINDOW_CONFIGURATION;
          }
  
          return changed;
      }
  
      /**
       * Return a bit mask of the differences between this Configuration
       * object and the given one.  Does not change the values of either.  Any
       * undefined fields in <var>delta</var> are ignored.
       * @return Returns a bit mask indicating which configuration
       * values has changed, containing any combination of
       * {@link android.content.pm.ActivityInfo#CONFIG_FONT_SCALE
       * PackageManager.ActivityInfo.CONFIG_FONT_SCALE},
       * {@link android.content.pm.ActivityInfo#CONFIG_MCC
       * PackageManager.ActivityInfo.CONFIG_MCC},
       * {@link android.content.pm.ActivityInfo#CONFIG_MNC
       * PackageManager.ActivityInfo.CONFIG_MNC},
       * {@link android.content.pm.ActivityInfo#CONFIG_LOCALE
       * PackageManager.ActivityInfo.CONFIG_LOCALE},
       * {@link android.content.pm.ActivityInfo#CONFIG_TOUCHSCREEN
       * PackageManager.ActivityInfo.CONFIG_TOUCHSCREEN},
       * {@link android.content.pm.ActivityInfo#CONFIG_KEYBOARD
       * PackageManager.ActivityInfo.CONFIG_KEYBOARD},
       * {@link android.content.pm.ActivityInfo#CONFIG_NAVIGATION
       * PackageManager.ActivityInfo.CONFIG_NAVIGATION},
       * {@link android.content.pm.ActivityInfo#CONFIG_ORIENTATION
       * PackageManager.ActivityInfo.CONFIG_ORIENTATION},
       * {@link android.content.pm.ActivityInfo#CONFIG_SCREEN_LAYOUT
       * PackageManager.ActivityInfo.CONFIG_SCREEN_LAYOUT}, or
       * {@link android.content.pm.ActivityInfo#CONFIG_SCREEN_SIZE
       * PackageManager.ActivityInfo.CONFIG_SCREEN_SIZE}, or
       * {@link android.content.pm.ActivityInfo#CONFIG_SMALLEST_SCREEN_SIZE
       * PackageManager.ActivityInfo.CONFIG_SMALLEST_SCREEN_SIZE}.
       * {@link android.content.pm.ActivityInfo#CONFIG_LAYOUT_DIRECTION
       * PackageManager.ActivityInfo.CONFIG_LAYOUT_DIRECTION}.
       */
      public int diff(Configuration delta) {
          return diff(delta, false /* compareUndefined */, false /* publicOnly */);
      }
  
      /**
       * Returns the diff against the provided {@link Configuration} excluding values that would
       * publicly be equivalent, such as appBounds.
       * @param delta {@link Configuration} to compare to.
       *
       * TODO(b/36812336): Remove once appBounds has been moved out of Configuration.
       * {@hide}
       */
      public int diffPublicOnly(Configuration delta) {
          return diff(delta, false /* compareUndefined */, true /* publicOnly */);
      }
  
      /**
       * Variation of {@link #diff(Configuration)} with an option to skip checks for undefined values.
       *
       * @hide
       */
      public int diff(Configuration delta, boolean compareUndefined, boolean publicOnly) {
          int changed = 0;
          if ((compareUndefined || delta.fontScale > 0) && fontScale != delta.fontScale) {
              changed |= ActivityInfo.CONFIG_FONT_SCALE;
          }
          if ((compareUndefined || delta.mcc != 0) && mcc != delta.mcc) {
              changed |= ActivityInfo.CONFIG_MCC;
          }
          if ((compareUndefined || delta.mnc != 0) && mnc != delta.mnc) {
              changed |= ActivityInfo.CONFIG_MNC;
          }
          fixUpLocaleList();
          delta.fixUpLocaleList();
          if ((compareUndefined || !delta.mLocaleList.isEmpty())
                  && !mLocaleList.equals(delta.mLocaleList)) {
              changed |= ActivityInfo.CONFIG_LOCALE;
              changed |= ActivityInfo.CONFIG_LAYOUT_DIRECTION;
          }
          final int deltaScreenLayoutDir = delta.screenLayout & SCREENLAYOUT_LAYOUTDIR_MASK;
          if ((compareUndefined || deltaScreenLayoutDir != SCREENLAYOUT_LAYOUTDIR_UNDEFINED)
                  && deltaScreenLayoutDir != (screenLayout & SCREENLAYOUT_LAYOUTDIR_MASK)) {
              changed |= ActivityInfo.CONFIG_LAYOUT_DIRECTION;
          }
          if ((compareUndefined || delta.touchscreen != TOUCHSCREEN_UNDEFINED)
                  && touchscreen != delta.touchscreen) {
              changed |= ActivityInfo.CONFIG_TOUCHSCREEN;
          }
          if ((compareUndefined || delta.keyboard != KEYBOARD_UNDEFINED)
                  && keyboard != delta.keyboard) {
              changed |= ActivityInfo.CONFIG_KEYBOARD;
          }
          if ((compareUndefined || delta.keyboardHidden != KEYBOARDHIDDEN_UNDEFINED)
                  && keyboardHidden != delta.keyboardHidden) {
              changed |= ActivityInfo.CONFIG_KEYBOARD_HIDDEN;
          }
          if ((compareUndefined || delta.hardKeyboardHidden != HARDKEYBOARDHIDDEN_UNDEFINED)
                  && hardKeyboardHidden != delta.hardKeyboardHidden) {
              changed |= ActivityInfo.CONFIG_KEYBOARD_HIDDEN;
          }
          if ((compareUndefined || delta.navigation != NAVIGATION_UNDEFINED)
                  && navigation != delta.navigation) {
              changed |= ActivityInfo.CONFIG_NAVIGATION;
          }
          if ((compareUndefined || delta.navigationHidden != NAVIGATIONHIDDEN_UNDEFINED)
                  && navigationHidden != delta.navigationHidden) {
              changed |= ActivityInfo.CONFIG_KEYBOARD_HIDDEN;
          }
          if ((compareUndefined || delta.orientation != ORIENTATION_UNDEFINED)
                  && orientation != delta.orientation) {
              changed |= ActivityInfo.CONFIG_ORIENTATION;
          }
          if ((compareUndefined || getScreenLayoutNoDirection(delta.screenLayout) !=
                  (SCREENLAYOUT_SIZE_UNDEFINED | SCREENLAYOUT_LONG_UNDEFINED))
                  && getScreenLayoutNoDirection(screenLayout) !=
                  getScreenLayoutNoDirection(delta.screenLayout)) {
              changed |= ActivityInfo.CONFIG_SCREEN_LAYOUT;
          }
          if ((compareUndefined ||
                       (delta.colorMode & COLOR_MODE_HDR_MASK) != COLOR_MODE_HDR_UNDEFINED)
                  && (colorMode & COLOR_MODE_HDR_MASK) !=
                          (delta.colorMode & COLOR_MODE_HDR_MASK)) {
              changed |= ActivityInfo.CONFIG_COLOR_MODE;
          }
          if ((compareUndefined ||
                       (delta.colorMode & COLOR_MODE_WIDE_COLOR_GAMUT_MASK) !=
                               COLOR_MODE_WIDE_COLOR_GAMUT_UNDEFINED)
                  && (colorMode & COLOR_MODE_WIDE_COLOR_GAMUT_MASK) !=
                          (delta.colorMode & COLOR_MODE_WIDE_COLOR_GAMUT_MASK)) {
              changed |= ActivityInfo.CONFIG_COLOR_MODE;
          }
          if ((compareUndefined || delta.uiMode != (UI_MODE_TYPE_UNDEFINED|UI_MODE_NIGHT_UNDEFINED))
                  && uiMode != delta.uiMode) {
              changed |= ActivityInfo.CONFIG_UI_MODE;
          }
          if ((compareUndefined || delta.screenWidthDp != SCREEN_WIDTH_DP_UNDEFINED)
                  && screenWidthDp != delta.screenWidthDp) {
              changed |= ActivityInfo.CONFIG_SCREEN_SIZE;
          }
          if ((compareUndefined || delta.screenHeightDp != SCREEN_HEIGHT_DP_UNDEFINED)
                  && screenHeightDp != delta.screenHeightDp) {
              changed |= ActivityInfo.CONFIG_SCREEN_SIZE;
          }
          if ((compareUndefined || delta.smallestScreenWidthDp != SMALLEST_SCREEN_WIDTH_DP_UNDEFINED)
                  && smallestScreenWidthDp != delta.smallestScreenWidthDp) {
              changed |= ActivityInfo.CONFIG_SMALLEST_SCREEN_SIZE;
          }
          if ((compareUndefined || delta.densityDpi != DENSITY_DPI_UNDEFINED)
                  && densityDpi != delta.densityDpi) {
              changed |= ActivityInfo.CONFIG_DENSITY;
          }
          if ((compareUndefined || delta.assetsSeq != ASSETS_SEQ_UNDEFINED)
                  && assetsSeq != delta.assetsSeq) {
              changed |= ActivityInfo.CONFIG_ASSETS_PATHS;
          }
  
          // WindowConfiguration differences aren't considered public...
          if (!publicOnly
                  && windowConfiguration.diff(delta.windowConfiguration, compareUndefined) != 0) {
              changed |= ActivityInfo.CONFIG_WINDOW_CONFIGURATION;
          }
  
          return changed;
      }
  
      /**
       * Determines if a new resource needs to be loaded from the bit set of
       * configuration changes returned by {@link #updateFrom(Configuration)}.
       *
       * @param configChanges the mask of changes configurations as returned by
       *                      {@link #updateFrom(Configuration)}
       * @param interestingChanges the configuration changes that the resource
       *                           can handle as given in
       *                           {@link android.util.TypedValue#changingConfigurations}
       * @return {@code true} if the resource needs to be loaded, {@code false}
       *         otherwise
       */
      public static boolean needNewResources(@Config int configChanges,
              @Config int interestingChanges) {
          // CONFIG_ASSETS_PATHS and CONFIG_FONT_SCALE are higher level configuration changes that
          // all resources are subject to change with.
          interestingChanges = interestingChanges | ActivityInfo.CONFIG_ASSETS_PATHS
                  | ActivityInfo.CONFIG_FONT_SCALE;
          return (configChanges & interestingChanges) != 0;
      }
  
      /**
       * @hide Return true if the sequence of 'other' is better than this.  Assumes
       * that 'this' is your current sequence and 'other' is a new one you have
       * received some how and want to compare with what you have.
       */
      public boolean isOtherSeqNewer(Configuration other) {
          if (other == null) {
              // Sanity check.
              return false;
          }
          if (other.seq == 0) {
              // If the other sequence is not specified, then we must assume
              // it is newer since we don't know any better.
              return true;
          }
          if (seq == 0) {
              // If this sequence is not specified, then we also consider the
              // other is better.  Yes we have a preference for other.  Sue us.
              return true;
          }
          int diff = other.seq - seq;
          if (diff > 0x10000) {
              // If there has been a sufficiently large jump, assume the
              // sequence has wrapped around.
              return false;
          }
          return diff > 0;
      }
  
      /**
       * Parcelable methods
       */
      public int describeContents() {
          return 0;
      }
  
      public void writeToParcel(Parcel dest, int flags) {
          dest.writeFloat(fontScale);
          dest.writeInt(mcc);
          dest.writeInt(mnc);
  
          fixUpLocaleList();
          dest.writeParcelable(mLocaleList, flags);
  
          if(userSetLocale) {
              dest.writeInt(1);
          } else {
              dest.writeInt(0);
          }
          dest.writeInt(touchscreen);
          dest.writeInt(keyboard);
          dest.writeInt(keyboardHidden);
          dest.writeInt(hardKeyboardHidden);
          dest.writeInt(navigation);
          dest.writeInt(navigationHidden);
          dest.writeInt(orientation);
          dest.writeInt(screenLayout);
          dest.writeInt(colorMode);
          dest.writeInt(uiMode);
          dest.writeInt(screenWidthDp);
          dest.writeInt(screenHeightDp);
          dest.writeInt(smallestScreenWidthDp);
          dest.writeInt(densityDpi);
          dest.writeInt(compatScreenWidthDp);
          dest.writeInt(compatScreenHeightDp);
          dest.writeInt(compatSmallestScreenWidthDp);
          dest.writeValue(windowConfiguration);
          dest.writeInt(assetsSeq);
          dest.writeInt(seq);
      }
  
      public void readFromParcel(Parcel source) {
          fontScale = source.readFloat();
          mcc = source.readInt();
          mnc = source.readInt();
  
          mLocaleList = source.readParcelable(LocaleList.class.getClassLoader());
          locale = mLocaleList.get(0);
  
          userSetLocale = (source.readInt()==1);
          touchscreen = source.readInt();
          keyboard = source.readInt();
          keyboardHidden = source.readInt();
          hardKeyboardHidden = source.readInt();
          navigation = source.readInt();
          navigationHidden = source.readInt();
          orientation = source.readInt();
          screenLayout = source.readInt();
          colorMode = source.readInt();
          uiMode = source.readInt();
          screenWidthDp = source.readInt();
          screenHeightDp = source.readInt();
          smallestScreenWidthDp = source.readInt();
          densityDpi = source.readInt();
          compatScreenWidthDp = source.readInt();
          compatScreenHeightDp = source.readInt();
          compatSmallestScreenWidthDp = source.readInt();
          windowConfiguration.setTo((WindowConfiguration) source.readValue(null));
          assetsSeq = source.readInt();
          seq = source.readInt();
      }
  
      public static final @android.annotation.NonNull Parcelable.Creator<Configuration> CREATOR
              = new Parcelable.Creator<Configuration>() {
          public Configuration createFromParcel(Parcel source) {
              return new Configuration(source);
          }
  
          public Configuration[] newArray(int size) {
              return new Configuration[size];
          }
      };
  
      /**
       * Construct this Configuration object, reading from the Parcel.
       */
      private Configuration(Parcel source) {
          readFromParcel(source);
      }
  
      public int compareTo(Configuration that) {
          int n;
          float a = this.fontScale;
          float b = that.fontScale;
          if (a < b) return -1;
          if (a > b) return 1;
          n = this.mcc - that.mcc;
          if (n != 0) return n;
          n = this.mnc - that.mnc;
          if (n != 0) return n;
  
          fixUpLocaleList();
          that.fixUpLocaleList();
          // for backward compatibility, we consider an empty locale list to be greater
          // than any non-empty locale list.
          if (this.mLocaleList.isEmpty()) {
              if (!that.mLocaleList.isEmpty()) return 1;
          } else if (that.mLocaleList.isEmpty()) {
              return -1;
          } else {
              final int minSize = Math.min(this.mLocaleList.size(), that.mLocaleList.size());
              for (int i = 0; i < minSize; ++i) {
                  final Locale thisLocale = this.mLocaleList.get(i);
                  final Locale thatLocale = that.mLocaleList.get(i);
                  n = thisLocale.getLanguage().compareTo(thatLocale.getLanguage());
                  if (n != 0) return n;
                  n = thisLocale.getCountry().compareTo(thatLocale.getCountry());
                  if (n != 0) return n;
                  n = thisLocale.getVariant().compareTo(thatLocale.getVariant());
                  if (n != 0) return n;
                  n = thisLocale.toLanguageTag().compareTo(thatLocale.toLanguageTag());
                  if (n != 0) return n;
              }
              n = this.mLocaleList.size() - that.mLocaleList.size();
              if (n != 0) return n;
          }
  
          n = this.touchscreen - that.touchscreen;
          if (n != 0) return n;
          n = this.keyboard - that.keyboard;
          if (n != 0) return n;
          n = this.keyboardHidden - that.keyboardHidden;
          if (n != 0) return n;
          n = this.hardKeyboardHidden - that.hardKeyboardHidden;
          if (n != 0) return n;
          n = this.navigation - that.navigation;
          if (n != 0) return n;
          n = this.navigationHidden - that.navigationHidden;
          if (n != 0) return n;
          n = this.orientation - that.orientation;
          if (n != 0) return n;
          n = this.colorMode - that.colorMode;
          if (n != 0) return n;
          n = this.screenLayout - that.screenLayout;
          if (n != 0) return n;
          n = this.uiMode - that.uiMode;
          if (n != 0) return n;
          n = this.screenWidthDp - that.screenWidthDp;
          if (n != 0) return n;
          n = this.screenHeightDp - that.screenHeightDp;
          if (n != 0) return n;
          n = this.smallestScreenWidthDp - that.smallestScreenWidthDp;
          if (n != 0) return n;
          n = this.densityDpi - that.densityDpi;
          if (n != 0) return n;
          n = this.assetsSeq - that.assetsSeq;
          if (n != 0) return n;
          n = windowConfiguration.compareTo(that.windowConfiguration);
          if (n != 0) return n;
  
          // if (n != 0) return n;
          return n;
      }
  
      public boolean equals(Configuration that) {
          if (that == null) return false;
          if (that == this) return true;
          return this.compareTo(that) == 0;
      }
  
      public boolean equals(Object that) {
          try {
              return equals((Configuration)that);
          } catch (ClassCastException e) {
          }
          return false;
      }
  
      public int hashCode() {
          int result = 17;
          result = 31 * result + Float.floatToIntBits(fontScale);
          result = 31 * result + mcc;
          result = 31 * result + mnc;
          result = 31 * result + mLocaleList.hashCode();
          result = 31 * result + touchscreen;
          result = 31 * result + keyboard;
          result = 31 * result + keyboardHidden;
          result = 31 * result + hardKeyboardHidden;
          result = 31 * result + navigation;
          result = 31 * result + navigationHidden;
          result = 31 * result + orientation;
          result = 31 * result + screenLayout;
          result = 31 * result + colorMode;
          result = 31 * result + uiMode;
          result = 31 * result + screenWidthDp;
          result = 31 * result + screenHeightDp;
          result = 31 * result + smallestScreenWidthDp;
          result = 31 * result + densityDpi;
          result = 31 * result + assetsSeq;
          return result;
      }
  
      /**
       * Get the locale list. This is the preferred way for getting the locales (instead of using
       * the direct accessor to {@link #locale}, which would only provide the primary locale).
       *
       * @return The locale list.
       */
      public @NonNull LocaleList getLocales() {
          fixUpLocaleList();
          return mLocaleList;
      }
  
      /**
       * Set the locale list. This is the preferred way for setting up the locales (instead of using
       * the direct accessor or {@link #setLocale(Locale)}). This will also set the layout direction
       * according to the first locale in the list.
       *
       * Note that the layout direction will always come from the first locale in the locale list,
       * even if the locale is not supported by the resources (the resources may only support
       * another locale further down the list which has a different direction).
       *
       * @param locales The locale list. If null, an empty LocaleList will be assigned.
       */
      public void setLocales(@Nullable LocaleList locales) {
          mLocaleList = locales == null ? LocaleList.getEmptyLocaleList() : locales;
          locale = mLocaleList.get(0);
          setLayoutDirection(locale);
      }
  
      /**
       * Set the locale list to a list of just one locale. This will also set the layout direction
       * according to the locale.
       *
       * Note that after this is run, calling <code>.equals()</code> on the input locale and the
       * {@link #locale} attribute would return <code>true</code> if they are not null, but there is
       * no guarantee that they would be the same object.
       *
       * See also the note about layout direction in {@link #setLocales(LocaleList)}.
       *
       * @param loc The locale. Can be null.
       */
      public void setLocale(@Nullable Locale loc) {
          setLocales(loc == null ? LocaleList.getEmptyLocaleList() : new LocaleList(loc));
      }
  
      /**
       * @hide
       *
       * Clears the locale without changing layout direction.
       */
      public void clearLocales() {
          mLocaleList = LocaleList.getEmptyLocaleList();
          locale = null;
      }
  
      /**
       * Return the layout direction. Will be either {@link View#LAYOUT_DIRECTION_LTR} or
       * {@link View#LAYOUT_DIRECTION_RTL}.
       *
       * @return Returns {@link View#LAYOUT_DIRECTION_RTL} if the configuration
       * is {@link #SCREENLAYOUT_LAYOUTDIR_RTL}, otherwise {@link View#LAYOUT_DIRECTION_LTR}.
       */
      public int getLayoutDirection() {
          return (screenLayout&SCREENLAYOUT_LAYOUTDIR_MASK) == SCREENLAYOUT_LAYOUTDIR_RTL
                  ? View.LAYOUT_DIRECTION_RTL : View.LAYOUT_DIRECTION_LTR;
      }
  
      /**
       * Set the layout direction from a Locale.
       *
       * @param loc The Locale. If null will set the layout direction to
       * {@link View#LAYOUT_DIRECTION_LTR}. If not null will set it to the layout direction
       * corresponding to the Locale.
       *
       * @see View#LAYOUT_DIRECTION_LTR
       * @see View#LAYOUT_DIRECTION_RTL
       */
      public void setLayoutDirection(Locale loc) {
          // There is a "1" difference between the configuration values for
          // layout direction and View constants for layout direction, just add "1".
          final int layoutDirection = 1 + TextUtils.getLayoutDirectionFromLocale(loc);
          screenLayout = (screenLayout&~SCREENLAYOUT_LAYOUTDIR_MASK)|
                  (layoutDirection << SCREENLAYOUT_LAYOUTDIR_SHIFT);
      }
  
      private static int getScreenLayoutNoDirection(int screenLayout) {
          return screenLayout&~SCREENLAYOUT_LAYOUTDIR_MASK;
      }
  
      /**
       * Return whether the screen has a round shape. Apps may choose to change styling based
       * on this property, such as the alignment or layout of text or informational icons.
       *
       * @return true if the screen is rounded, false otherwise
       */
      public boolean isScreenRound() {
          return (screenLayout & SCREENLAYOUT_ROUND_MASK) == SCREENLAYOUT_ROUND_YES;
      }
  
      /**
       * Return whether the screen has a wide color gamut and wide color gamut rendering
       * is supported by this device.
       *
       * When true, it implies the screen is colorspace aware but not
       * necessarily color-managed. The final colors may still be changed by the
       * screen depending on user settings.
       *
       * @return true if the screen has a wide color gamut and wide color gamut rendering
       * is supported, false otherwise
       */
      public boolean isScreenWideColorGamut() {
          return (colorMode & COLOR_MODE_WIDE_COLOR_GAMUT_MASK) == COLOR_MODE_WIDE_COLOR_GAMUT_YES;
      }
  
      /**
       * Return whether the screen has a high dynamic range.
       *
       * @return true if the screen has a high dynamic range, false otherwise
       */
      public boolean isScreenHdr() {
          return (colorMode & COLOR_MODE_HDR_MASK) == COLOR_MODE_HDR_YES;
      }
  
      /**
       *
       * @hide
       */
      public static String localesToResourceQualifier(LocaleList locs) {
          final StringBuilder sb = new StringBuilder();
          for (int i = 0; i < locs.size(); i++) {
              final Locale loc = locs.get(i);
              final int l = loc.getLanguage().length();
              if (l == 0) {
                  continue;
              }
              final int s = loc.getScript().length();
              final int c = loc.getCountry().length();
              final int v = loc.getVariant().length();
              // We ignore locale extensions, since they are not supported by AAPT
  
              if (sb.length() != 0) {
                  sb.append(",");
              }
              if (l == 2 && s == 0 && (c == 0 || c == 2) && v == 0) {
                  // Traditional locale format: xx or xx-rYY
                  sb.append(loc.getLanguage());
                  if (c == 2) {
                      sb.append("-r").append(loc.getCountry());
                  }
              } else {
                  sb.append("b+");
                  sb.append(loc.getLanguage());
                  if (s != 0) {
                      sb.append("+");
                      sb.append(loc.getScript());
                  }
                  if (c != 0) {
                      sb.append("+");
                      sb.append(loc.getCountry());
                  }
                  if (v != 0) {
                      sb.append("+");
                      sb.append(loc.getVariant());
                  }
              }
          }
          return sb.toString();
      }
  
  
      /**
       * Returns a string representation of the configuration that can be parsed
       * by build tools (like AAPT), without display metrics included
       *
       * @hide
       */
      @UnsupportedAppUsage
      public static String resourceQualifierString(Configuration config) {
          return resourceQualifierString(config, null);
      }
  
      /**
       * Returns a string representation of the configuration that can be parsed
       * by build tools (like AAPT).
       *
       * @hide
       */
      public static String resourceQualifierString(Configuration config, DisplayMetrics metrics) {
          ArrayList<String> parts = new ArrayList<String>();
  
          if (config.mcc != 0) {
              parts.add("mcc" + config.mcc);
              if (config.mnc != 0) {
                  parts.add("mnc" + config.mnc);
              }
          }
  
          if (!config.mLocaleList.isEmpty()) {
              final String resourceQualifier = localesToResourceQualifier(config.mLocaleList);
              if (!resourceQualifier.isEmpty()) {
                  parts.add(resourceQualifier);
              }
          }
  
          switch (config.screenLayout & Configuration.SCREENLAYOUT_LAYOUTDIR_MASK) {
              case Configuration.SCREENLAYOUT_LAYOUTDIR_LTR:
                  parts.add("ldltr");
                  break;
              case Configuration.SCREENLAYOUT_LAYOUTDIR_RTL:
                  parts.add("ldrtl");
                  break;
              default:
                  break;
          }
  
          if (config.smallestScreenWidthDp != 0) {
              parts.add("sw" + config.smallestScreenWidthDp + "dp");
          }
  
          if (config.screenWidthDp != 0) {
              parts.add("w" + config.screenWidthDp + "dp");
          }
  
          if (config.screenHeightDp != 0) {
              parts.add("h" + config.screenHeightDp + "dp");
          }
  
          switch (config.screenLayout & Configuration.SCREENLAYOUT_SIZE_MASK) {
              case Configuration.SCREENLAYOUT_SIZE_SMALL:
                  parts.add("small");
                  break;
              case Configuration.SCREENLAYOUT_SIZE_NORMAL:
                  parts.add("normal");
                  break;
              case Configuration.SCREENLAYOUT_SIZE_LARGE:
                  parts.add("large");
                  break;
              case Configuration.SCREENLAYOUT_SIZE_XLARGE:
                  parts.add("xlarge");
                  break;
              default:
                  break;
          }
  
          switch (config.screenLayout & Configuration.SCREENLAYOUT_LONG_MASK) {
              case Configuration.SCREENLAYOUT_LONG_YES:
                  parts.add("long");
                  break;
              case Configuration.SCREENLAYOUT_LONG_NO:
                  parts.add("notlong");
                  break;
              default:
                  break;
          }
  
          switch (config.screenLayout & Configuration.SCREENLAYOUT_ROUND_MASK) {
              case Configuration.SCREENLAYOUT_ROUND_YES:
                  parts.add("round");
                  break;
              case Configuration.SCREENLAYOUT_ROUND_NO:
                  parts.add("notround");
                  break;
              default:
                  break;
          }
  
          switch (config.colorMode & Configuration.COLOR_MODE_WIDE_COLOR_GAMUT_MASK) {
              case Configuration.COLOR_MODE_WIDE_COLOR_GAMUT_YES:
                  parts.add("widecg");
                  break;
              case Configuration.COLOR_MODE_WIDE_COLOR_GAMUT_NO:
                  parts.add("nowidecg");
                  break;
              default:
                  break;
          }
  
          switch (config.colorMode & Configuration.COLOR_MODE_HDR_MASK) {
              case Configuration.COLOR_MODE_HDR_YES:
                  parts.add("highdr");
                  break;
              case Configuration.COLOR_MODE_HDR_NO:
                  parts.add("lowdr");
                  break;
              default:
                  break;
          }
  
          switch (config.orientation) {
              case Configuration.ORIENTATION_LANDSCAPE:
                  parts.add("land");
                  break;
              case Configuration.ORIENTATION_PORTRAIT:
                  parts.add("port");
                  break;
              default:
                  break;
          }
  
          switch (config.uiMode & Configuration.UI_MODE_TYPE_MASK) {
              case Configuration.UI_MODE_TYPE_APPLIANCE:
                  parts.add("appliance");
                  break;
              case Configuration.UI_MODE_TYPE_DESK:
                  parts.add("desk");
                  break;
              case Configuration.UI_MODE_TYPE_TELEVISION:
                  parts.add("television");
                  break;
              case Configuration.UI_MODE_TYPE_CAR:
                  parts.add("car");
                  break;
              case Configuration.UI_MODE_TYPE_WATCH:
                  parts.add("watch");
                  break;
              case Configuration.UI_MODE_TYPE_VR_HEADSET:
                  parts.add("vrheadset");
                  break;
              default:
                  break;
          }
  
          switch (config.uiMode & Configuration.UI_MODE_NIGHT_MASK) {
              case Configuration.UI_MODE_NIGHT_YES:
                  parts.add("night");
                  break;
              case Configuration.UI_MODE_NIGHT_NO:
                  parts.add("notnight");
                  break;
              default:
                  break;
          }
  
          switch (config.densityDpi) {
              case DENSITY_DPI_UNDEFINED:
                  break;
              case 120:
                  parts.add("ldpi");
                  break;
              case 160:
                  parts.add("mdpi");
                  break;
              case 213:
                  parts.add("tvdpi");
                  break;
              case 240:
                  parts.add("hdpi");
                  break;
              case 320:
                  parts.add("xhdpi");
                  break;
              case 480:
                  parts.add("xxhdpi");
                  break;
              case 640:
                  parts.add("xxxhdpi");
                  break;
              case DENSITY_DPI_ANY:
                  parts.add("anydpi");
                  break;
              case DENSITY_DPI_NONE:
                  parts.add("nodpi");
                  break;
              default:
                  parts.add(config.densityDpi + "dpi");
                  break;
          }
  
          switch (config.touchscreen) {
              case Configuration.TOUCHSCREEN_NOTOUCH:
                  parts.add("notouch");
                  break;
              case Configuration.TOUCHSCREEN_FINGER:
                  parts.add("finger");
                  break;
              default:
                  break;
          }
  
          switch (config.keyboardHidden) {
              case Configuration.KEYBOARDHIDDEN_NO:
                  parts.add("keysexposed");
                  break;
              case Configuration.KEYBOARDHIDDEN_YES:
                  parts.add("keyshidden");
                  break;
              case Configuration.KEYBOARDHIDDEN_SOFT:
                  parts.add("keyssoft");
                  break;
              default:
                  break;
          }
  
          switch (config.keyboard) {
              case Configuration.KEYBOARD_NOKEYS:
                  parts.add("nokeys");
                  break;
              case Configuration.KEYBOARD_QWERTY:
                  parts.add("qwerty");
                  break;
              case Configuration.KEYBOARD_12KEY:
                  parts.add("12key");
                  break;
              default:
                  break;
          }
  
          switch (config.navigationHidden) {
              case Configuration.NAVIGATIONHIDDEN_NO:
                  parts.add("navexposed");
                  break;
              case Configuration.NAVIGATIONHIDDEN_YES:
                  parts.add("navhidden");
                  break;
              default:
                  break;
          }
  
          switch (config.navigation) {
              case Configuration.NAVIGATION_NONAV:
                  parts.add("nonav");
                  break;
              case Configuration.NAVIGATION_DPAD:
                  parts.add("dpad");
                  break;
              case Configuration.NAVIGATION_TRACKBALL:
                  parts.add("trackball");
                  break;
              case Configuration.NAVIGATION_WHEEL:
                  parts.add("wheel");
                  break;
              default:
                  break;
          }
  
          if (metrics != null) {
              final int width, height;
              if (metrics.widthPixels >= metrics.heightPixels) {
                  width = metrics.widthPixels;
                  height = metrics.heightPixels;
              } else {
                  //noinspection SuspiciousNameCombination
                  width = metrics.heightPixels;
                  //noinspection SuspiciousNameCombination
                  height = metrics.widthPixels;
              }
              parts.add(width + "x" + height);
          }
  
          parts.add("v" + Build.VERSION.RESOURCES_SDK_INT);
          return TextUtils.join("-", parts);
      }
  
      /**
       * Generate a delta Configuration between <code>base</code> and <code>change</code>. The
       * resulting delta can be used with {@link #updateFrom(Configuration)}.
       * <p />
       * Caveat: If the any of the Configuration's members becomes undefined, then
       * {@link #updateFrom(Configuration)} will treat it as a no-op and not update that member.
       *
       * This is fine for device configurations as no member is ever undefined.
       * {@hide}
       */
      @UnsupportedAppUsage
      public static Configuration generateDelta(Configuration base, Configuration change) {
          final Configuration delta = new Configuration();
          if (base.fontScale != change.fontScale) {
              delta.fontScale = change.fontScale;
          }
  
          if (base.mcc != change.mcc) {
              delta.mcc = change.mcc;
          }
  
          if (base.mnc != change.mnc) {
              delta.mnc = change.mnc;
          }
  
          base.fixUpLocaleList();
          change.fixUpLocaleList();
          if (!base.mLocaleList.equals(change.mLocaleList))  {
              delta.mLocaleList = change.mLocaleList;
              delta.locale = change.locale;
          }
  
          if (base.touchscreen != change.touchscreen) {
              delta.touchscreen = change.touchscreen;
          }
  
          if (base.keyboard != change.keyboard) {
              delta.keyboard = change.keyboard;
          }
  
          if (base.keyboardHidden != change.keyboardHidden) {
              delta.keyboardHidden = change.keyboardHidden;
          }
  
          if (base.navigation != change.navigation) {
              delta.navigation = change.navigation;
          }
  
          if (base.navigationHidden != change.navigationHidden) {
              delta.navigationHidden = change.navigationHidden;
          }
  
          if (base.orientation != change.orientation) {
              delta.orientation = change.orientation;
          }
  
          if ((base.screenLayout & SCREENLAYOUT_SIZE_MASK) !=
                  (change.screenLayout & SCREENLAYOUT_SIZE_MASK)) {
              delta.screenLayout |= change.screenLayout & SCREENLAYOUT_SIZE_MASK;
          }
  
          if ((base.screenLayout & SCREENLAYOUT_LAYOUTDIR_MASK) !=
                  (change.screenLayout & SCREENLAYOUT_LAYOUTDIR_MASK)) {
              delta.screenLayout |= change.screenLayout & SCREENLAYOUT_LAYOUTDIR_MASK;
          }
  
          if ((base.screenLayout & SCREENLAYOUT_LONG_MASK) !=
                  (change.screenLayout & SCREENLAYOUT_LONG_MASK)) {
              delta.screenLayout |= change.screenLayout & SCREENLAYOUT_LONG_MASK;
          }
  
          if ((base.screenLayout & SCREENLAYOUT_ROUND_MASK) !=
                  (change.screenLayout & SCREENLAYOUT_ROUND_MASK)) {
              delta.screenLayout |= change.screenLayout & SCREENLAYOUT_ROUND_MASK;
          }
  
          if ((base.colorMode & COLOR_MODE_WIDE_COLOR_GAMUT_MASK) !=
                  (change.colorMode & COLOR_MODE_WIDE_COLOR_GAMUT_MASK)) {
              delta.colorMode |= change.colorMode & COLOR_MODE_WIDE_COLOR_GAMUT_MASK;
          }
  
          if ((base.colorMode & COLOR_MODE_HDR_MASK) !=
                  (change.colorMode & COLOR_MODE_HDR_MASK)) {
              delta.colorMode |= change.colorMode & COLOR_MODE_HDR_MASK;
          }
  
          if ((base.uiMode & UI_MODE_TYPE_MASK) != (change.uiMode & UI_MODE_TYPE_MASK)) {
              delta.uiMode |= change.uiMode & UI_MODE_TYPE_MASK;
          }
  
          if ((base.uiMode & UI_MODE_NIGHT_MASK) != (change.uiMode & UI_MODE_NIGHT_MASK)) {
              delta.uiMode |= change.uiMode & UI_MODE_NIGHT_MASK;
          }
  
          if (base.screenWidthDp != change.screenWidthDp) {
              delta.screenWidthDp = change.screenWidthDp;
          }
  
          if (base.screenHeightDp != change.screenHeightDp) {
              delta.screenHeightDp = change.screenHeightDp;
          }
  
          if (base.smallestScreenWidthDp != change.smallestScreenWidthDp) {
              delta.smallestScreenWidthDp = change.smallestScreenWidthDp;
          }
  
          if (base.densityDpi != change.densityDpi) {
              delta.densityDpi = change.densityDpi;
          }
  
          if (base.assetsSeq != change.assetsSeq) {
              delta.assetsSeq = change.assetsSeq;
          }
  
          if (!base.windowConfiguration.equals(change.windowConfiguration)) {
              delta.windowConfiguration.setTo(change.windowConfiguration);
          }
          return delta;
      }
  
      private static final String XML_ATTR_FONT_SCALE = "fs";
      private static final String XML_ATTR_MCC = "mcc";
      private static final String XML_ATTR_MNC = "mnc";
      private static final String XML_ATTR_LOCALES = "locales";
      private static final String XML_ATTR_TOUCHSCREEN = "touch";
      private static final String XML_ATTR_KEYBOARD = "key";
      private static final String XML_ATTR_KEYBOARD_HIDDEN = "keyHid";
      private static final String XML_ATTR_HARD_KEYBOARD_HIDDEN = "hardKeyHid";
      private static final String XML_ATTR_NAVIGATION = "nav";
      private static final String XML_ATTR_NAVIGATION_HIDDEN = "navHid";
      private static final String XML_ATTR_ORIENTATION = "ori";
      private static final String XML_ATTR_ROTATION = "rot";
      private static final String XML_ATTR_SCREEN_LAYOUT = "scrLay";
      private static final String XML_ATTR_COLOR_MODE = "clrMod";
      private static final String XML_ATTR_UI_MODE = "ui";
      private static final String XML_ATTR_SCREEN_WIDTH = "width";
      private static final String XML_ATTR_SCREEN_HEIGHT = "height";
      private static final String XML_ATTR_SMALLEST_WIDTH = "sw";
      private static final String XML_ATTR_DENSITY = "density";
      private static final String XML_ATTR_APP_BOUNDS = "app_bounds";
  
      /**
       * Reads the attributes corresponding to Configuration member fields from the Xml parser.
       * The parser is expected to be on a tag which has Configuration attributes.
       *
       * @param parser The Xml parser from which to read attributes.
       * @param configOut The Configuration to populate from the Xml attributes.
       * {@hide}
       */
      public static void readXmlAttrs(XmlPullParser parser, Configuration configOut)
              throws XmlPullParserException, IOException {
          configOut.fontScale = Float.intBitsToFloat(
                  XmlUtils.readIntAttribute(parser, XML_ATTR_FONT_SCALE, 0));
          configOut.mcc = XmlUtils.readIntAttribute(parser, XML_ATTR_MCC, 0);
          configOut.mnc = XmlUtils.readIntAttribute(parser, XML_ATTR_MNC, 0);
  
          final String localesStr = XmlUtils.readStringAttribute(parser, XML_ATTR_LOCALES);
          configOut.mLocaleList = LocaleList.forLanguageTags(localesStr);
          configOut.locale = configOut.mLocaleList.get(0);
  
          configOut.touchscreen = XmlUtils.readIntAttribute(parser, XML_ATTR_TOUCHSCREEN,
                  TOUCHSCREEN_UNDEFINED);
          configOut.keyboard = XmlUtils.readIntAttribute(parser, XML_ATTR_KEYBOARD,
                  KEYBOARD_UNDEFINED);
          configOut.keyboardHidden = XmlUtils.readIntAttribute(parser, XML_ATTR_KEYBOARD_HIDDEN,
                  KEYBOARDHIDDEN_UNDEFINED);
          configOut.hardKeyboardHidden =
                  XmlUtils.readIntAttribute(parser, XML_ATTR_HARD_KEYBOARD_HIDDEN,
                          HARDKEYBOARDHIDDEN_UNDEFINED);
          configOut.navigation = XmlUtils.readIntAttribute(parser, XML_ATTR_NAVIGATION,
                  NAVIGATION_UNDEFINED);
          configOut.navigationHidden = XmlUtils.readIntAttribute(parser, XML_ATTR_NAVIGATION_HIDDEN,
                  NAVIGATIONHIDDEN_UNDEFINED);
          configOut.orientation = XmlUtils.readIntAttribute(parser, XML_ATTR_ORIENTATION,
                  ORIENTATION_UNDEFINED);
          configOut.screenLayout = XmlUtils.readIntAttribute(parser, XML_ATTR_SCREEN_LAYOUT,
                  SCREENLAYOUT_UNDEFINED);
          configOut.colorMode = XmlUtils.readIntAttribute(parser, XML_ATTR_COLOR_MODE,
                  COLOR_MODE_UNDEFINED);
          configOut.uiMode = XmlUtils.readIntAttribute(parser, XML_ATTR_UI_MODE, 0);
          configOut.screenWidthDp = XmlUtils.readIntAttribute(parser, XML_ATTR_SCREEN_WIDTH,
                  SCREEN_WIDTH_DP_UNDEFINED);
          configOut.screenHeightDp = XmlUtils.readIntAttribute(parser, XML_ATTR_SCREEN_HEIGHT,
                  SCREEN_HEIGHT_DP_UNDEFINED);
          configOut.smallestScreenWidthDp =
                  XmlUtils.readIntAttribute(parser, XML_ATTR_SMALLEST_WIDTH,
                          SMALLEST_SCREEN_WIDTH_DP_UNDEFINED);
          configOut.densityDpi = XmlUtils.readIntAttribute(parser, XML_ATTR_DENSITY,
                  DENSITY_DPI_UNDEFINED);
  
          // For persistence, we don't care about assetsSeq and WindowConfiguration, so do not read it
          // out.
      }
  
  
      /**
       * Writes the Configuration's member fields as attributes into the XmlSerializer.
       * The serializer is expected to have already started a tag so that attributes can be
       * immediately written.
       *
       * @param xml The serializer to which to write the attributes.
       * @param config The Configuration whose member fields to write.
       * {@hide}
       */
      public static void writeXmlAttrs(XmlSerializer xml, Configuration config) throws IOException {
          XmlUtils.writeIntAttribute(xml, XML_ATTR_FONT_SCALE,
                  Float.floatToIntBits(config.fontScale));
          if (config.mcc != 0) {
              XmlUtils.writeIntAttribute(xml, XML_ATTR_MCC, config.mcc);
          }
          if (config.mnc != 0) {
              XmlUtils.writeIntAttribute(xml, XML_ATTR_MNC, config.mnc);
          }
          config.fixUpLocaleList();
          if (!config.mLocaleList.isEmpty()) {
             XmlUtils.writeStringAttribute(xml, XML_ATTR_LOCALES, config.mLocaleList.toLanguageTags());
          }
          if (config.touchscreen != TOUCHSCREEN_UNDEFINED) {
              XmlUtils.writeIntAttribute(xml, XML_ATTR_TOUCHSCREEN, config.touchscreen);
          }
          if (config.keyboard != KEYBOARD_UNDEFINED) {
              XmlUtils.writeIntAttribute(xml, XML_ATTR_KEYBOARD, config.keyboard);
          }
          if (config.keyboardHidden != KEYBOARDHIDDEN_UNDEFINED) {
              XmlUtils.writeIntAttribute(xml, XML_ATTR_KEYBOARD_HIDDEN, config.keyboardHidden);
          }
          if (config.hardKeyboardHidden != HARDKEYBOARDHIDDEN_UNDEFINED) {
              XmlUtils.writeIntAttribute(xml, XML_ATTR_HARD_KEYBOARD_HIDDEN,
                      config.hardKeyboardHidden);
          }
          if (config.navigation != NAVIGATION_UNDEFINED) {
              XmlUtils.writeIntAttribute(xml, XML_ATTR_NAVIGATION, config.navigation);
          }
          if (config.navigationHidden != NAVIGATIONHIDDEN_UNDEFINED) {
              XmlUtils.writeIntAttribute(xml, XML_ATTR_NAVIGATION_HIDDEN, config.navigationHidden);
          }
          if (config.orientation != ORIENTATION_UNDEFINED) {
              XmlUtils.writeIntAttribute(xml, XML_ATTR_ORIENTATION, config.orientation);
          }
          if (config.screenLayout != SCREENLAYOUT_UNDEFINED) {
              XmlUtils.writeIntAttribute(xml, XML_ATTR_SCREEN_LAYOUT, config.screenLayout);
          }
          if (config.colorMode != COLOR_MODE_UNDEFINED) {
              XmlUtils.writeIntAttribute(xml, XML_ATTR_COLOR_MODE, config.colorMode);
          }
          if (config.uiMode != 0) {
              XmlUtils.writeIntAttribute(xml, XML_ATTR_UI_MODE, config.uiMode);
          }
          if (config.screenWidthDp != SCREEN_WIDTH_DP_UNDEFINED) {
              XmlUtils.writeIntAttribute(xml, XML_ATTR_SCREEN_WIDTH, config.screenWidthDp);
          }
          if (config.screenHeightDp != SCREEN_HEIGHT_DP_UNDEFINED) {
              XmlUtils.writeIntAttribute(xml, XML_ATTR_SCREEN_HEIGHT, config.screenHeightDp);
          }
          if (config.smallestScreenWidthDp != SMALLEST_SCREEN_WIDTH_DP_UNDEFINED) {
              XmlUtils.writeIntAttribute(xml, XML_ATTR_SMALLEST_WIDTH, config.smallestScreenWidthDp);
          }
          if (config.densityDpi != DENSITY_DPI_UNDEFINED) {
              XmlUtils.writeIntAttribute(xml, XML_ATTR_DENSITY, config.densityDpi);
          }
  
          // For persistence, we do not care about assetsSeq and window configuration, so do not write
          // it out.
      }
  }
  