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      1 /*
      2  * Copyright (C) 2008 The Android Open Source Project
      3  *
      4  * Licensed under the Apache License, Version 2.0 (the "License");
      5  * you may not use this file except in compliance with the License.
      6  * You may obtain a copy of the License at
      7  *
      8  *      http://www.apache.org/licenses/LICENSE-2.0
      9  *
     10  * Unless required by applicable law or agreed to in writing, software
     11  * distributed under the License is distributed on an "AS IS" BASIS,
     12  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
     13  * See the License for the specific language governing permissions and
     14  * limitations under the License.
     15  */
     16 
     17 package android.content.res;
     18 
     19 import static android.content.ConfigurationProto.COLOR_MODE;
     20 import static android.content.ConfigurationProto.DENSITY_DPI;
     21 import static android.content.ConfigurationProto.FONT_SCALE;
     22 import static android.content.ConfigurationProto.HARD_KEYBOARD_HIDDEN;
     23 import static android.content.ConfigurationProto.KEYBOARD;
     24 import static android.content.ConfigurationProto.KEYBOARD_HIDDEN;
     25 import static android.content.ConfigurationProto.LOCALES;
     26 import static android.content.ConfigurationProto.MCC;
     27 import static android.content.ConfigurationProto.MNC;
     28 import static android.content.ConfigurationProto.NAVIGATION;
     29 import static android.content.ConfigurationProto.NAVIGATION_HIDDEN;
     30 import static android.content.ConfigurationProto.ORIENTATION;
     31 import static android.content.ConfigurationProto.SCREEN_HEIGHT_DP;
     32 import static android.content.ConfigurationProto.SCREEN_LAYOUT;
     33 import static android.content.ConfigurationProto.SCREEN_WIDTH_DP;
     34 import static android.content.ConfigurationProto.SMALLEST_SCREEN_WIDTH_DP;
     35 import static android.content.ConfigurationProto.TOUCHSCREEN;
     36 import static android.content.ConfigurationProto.UI_MODE;
     37 import static android.content.ConfigurationProto.WINDOW_CONFIGURATION;
     38 import static android.content.ResourcesConfigurationProto.CONFIGURATION;
     39 import static android.content.ResourcesConfigurationProto.SCREEN_HEIGHT_PX;
     40 import static android.content.ResourcesConfigurationProto.SCREEN_WIDTH_PX;
     41 import static android.content.ResourcesConfigurationProto.SDK_VERSION;
     42 
     43 import android.annotation.IntDef;
     44 import android.annotation.NonNull;
     45 import android.annotation.Nullable;
     46 import android.annotation.TestApi;
     47 import android.app.WindowConfiguration;
     48 import android.content.pm.ActivityInfo;
     49 import android.content.pm.ActivityInfo.Config;
     50 import android.os.Build;
     51 import android.os.LocaleList;
     52 import android.os.Parcel;
     53 import android.os.Parcelable;
     54 import android.text.TextUtils;
     55 import android.util.DisplayMetrics;
     56 import android.util.proto.ProtoOutputStream;
     57 import android.view.View;
     58 
     59 import com.android.internal.util.XmlUtils;
     60 
     61 import org.xmlpull.v1.XmlPullParser;
     62 import org.xmlpull.v1.XmlPullParserException;
     63 import org.xmlpull.v1.XmlSerializer;
     64 
     65 import java.io.IOException;
     66 import java.lang.annotation.Retention;
     67 import java.lang.annotation.RetentionPolicy;
     68 import java.util.ArrayList;
     69 import java.util.Locale;
     70 
     71 /**
     72  * This class describes all device configuration information that can
     73  * impact the resources the application retrieves.  This includes both
     74  * user-specified configuration options (locale list and scaling) as well
     75  * as device configurations (such as input modes, screen size and screen orientation).
     76  * <p>You can acquire this object from {@link Resources}, using {@link
     77  * Resources#getConfiguration}. Thus, from an activity, you can get it by chaining the request
     78  * with {@link android.app.Activity#getResources}:</p>
     79  * <pre>Configuration config = getResources().getConfiguration();</pre>
     80  */
     81 public final class Configuration implements Parcelable, Comparable<Configuration> {
     82     /** @hide */
     83     public static final Configuration EMPTY = new Configuration();
     84 
     85     /**
     86      * Current user preference for the scaling factor for fonts, relative
     87      * to the base density scaling.
     88      */
     89     public float fontScale;
     90 
     91     /**
     92      * IMSI MCC (Mobile Country Code), corresponding to
     93      * <a href="{@docRoot}guide/topics/resources/providing-resources.html#MccQualifier">mcc</a>
     94      * resource qualifier.  0 if undefined.
     95      */
     96     public int mcc;
     97 
     98     /**
     99      * IMSI MNC (Mobile Network Code), corresponding to
    100      * <a href="{@docRoot}guide/topics/resources/providing-resources.html#MccQualifier">mnc</a>
    101      * resource qualifier.  0 if undefined. Note that the actual MNC may be 0; in order to check
    102      * for this use the {@link #MNC_ZERO} symbol.
    103      */
    104     public int mnc;
    105 
    106     /**
    107      * Constant used to to represent MNC (Mobile Network Code) zero.
    108      * 0 cannot be used, since it is used to represent an undefined MNC.
    109      */
    110     public static final int MNC_ZERO = 0xffff;
    111 
    112     /**
    113      * Current user preference for the locale, corresponding to
    114      * <a href="{@docRoot}guide/topics/resources/providing-resources.html#LocaleQualifier">locale</a>
    115      * resource qualifier.
    116      *
    117      * @deprecated Do not set or read this directly. Use {@link #getLocales()} and
    118      * {@link #setLocales(LocaleList)}. If only the primary locale is needed,
    119      * <code>getLocales().get(0)</code> is now the preferred accessor.
    120      */
    121     @Deprecated public Locale locale;
    122 
    123     private LocaleList mLocaleList;
    124 
    125     /**
    126      * Locale should persist on setting.  This is hidden because it is really
    127      * questionable whether this is the right way to expose the functionality.
    128      * @hide
    129      */
    130     public boolean userSetLocale;
    131 
    132 
    133     /** Constant for {@link #colorMode}: bits that encode whether the screen is wide gamut. */
    134     public static final int COLOR_MODE_WIDE_COLOR_GAMUT_MASK = 0x3;
    135     /**
    136      * Constant for {@link #colorMode}: a {@link #COLOR_MODE_WIDE_COLOR_GAMUT_MASK} value
    137      * indicating that it is unknown whether or not the screen is wide gamut.
    138      */
    139     public static final int COLOR_MODE_WIDE_COLOR_GAMUT_UNDEFINED = 0x0;
    140     /**
    141      * Constant for {@link #colorMode}: a {@link #COLOR_MODE_WIDE_COLOR_GAMUT_MASK} value
    142      * indicating that the screen is not wide gamut.
    143      * <p>Corresponds to the <code>-nowidecg</code> resource qualifier.</p>
    144      */
    145     public static final int COLOR_MODE_WIDE_COLOR_GAMUT_NO = 0x1;
    146     /**
    147      * Constant for {@link #colorMode}: a {@link #COLOR_MODE_WIDE_COLOR_GAMUT_MASK} value
    148      * indicating that the screen is wide gamut.
    149      * <p>Corresponds to the <code>-widecg</code> resource qualifier.</p>
    150      */
    151     public static final int COLOR_MODE_WIDE_COLOR_GAMUT_YES = 0x2;
    152 
    153     /** Constant for {@link #colorMode}: bits that encode the dynamic range of the screen. */
    154     public static final int COLOR_MODE_HDR_MASK = 0xc;
    155     /** Constant for {@link #colorMode}: bits shift to get the screen dynamic range. */
    156     public static final int COLOR_MODE_HDR_SHIFT = 2;
    157     /**
    158      * Constant for {@link #colorMode}: a {@link #COLOR_MODE_HDR_MASK} value
    159      * indicating that it is unknown whether or not the screen is HDR.
    160      */
    161     public static final int COLOR_MODE_HDR_UNDEFINED = 0x0;
    162     /**
    163      * Constant for {@link #colorMode}: a {@link #COLOR_MODE_HDR_MASK} value
    164      * indicating that the screen is not HDR (low/standard dynamic range).
    165      * <p>Corresponds to the <code>-lowdr</code> resource qualifier.</p>
    166      */
    167     public static final int COLOR_MODE_HDR_NO = 0x1 << COLOR_MODE_HDR_SHIFT;
    168     /**
    169      * Constant for {@link #colorMode}: a {@link #COLOR_MODE_HDR_MASK} value
    170      * indicating that the screen is HDR (dynamic range).
    171      * <p>Corresponds to the <code>-highdr</code> resource qualifier.</p>
    172      */
    173     public static final int COLOR_MODE_HDR_YES = 0x2 << COLOR_MODE_HDR_SHIFT;
    174 
    175     /** Constant for {@link #colorMode}: a value indicating that the color mode is undefined */
    176     @SuppressWarnings("PointlessBitwiseExpression")
    177     public static final int COLOR_MODE_UNDEFINED = COLOR_MODE_WIDE_COLOR_GAMUT_UNDEFINED |
    178             COLOR_MODE_HDR_UNDEFINED;
    179 
    180     /**
    181      * Bit mask of color capabilities of the screen. Currently there are two fields:
    182      * <p>The {@link #COLOR_MODE_WIDE_COLOR_GAMUT_MASK} bits define the color gamut of
    183      * the screen. They may be one of
    184      * {@link #COLOR_MODE_WIDE_COLOR_GAMUT_NO} or {@link #COLOR_MODE_WIDE_COLOR_GAMUT_YES}.</p>
    185      *
    186      * <p>The {@link #COLOR_MODE_HDR_MASK} defines the dynamic range of the screen. They may be
    187      * one of {@link #COLOR_MODE_HDR_NO} or {@link #COLOR_MODE_HDR_YES}.</p>
    188      *
    189      * <p>See <a href="{@docRoot}guide/practices/screens_support.html">Supporting
    190      * Multiple Screens</a> for more information.</p>
    191      */
    192     public int colorMode;
    193 
    194     /** Constant for {@link #screenLayout}: bits that encode the size. */
    195     public static final int SCREENLAYOUT_SIZE_MASK = 0x0f;
    196     /** Constant for {@link #screenLayout}: a {@link #SCREENLAYOUT_SIZE_MASK}
    197      * value indicating that no size has been set. */
    198     public static final int SCREENLAYOUT_SIZE_UNDEFINED = 0x00;
    199     /** Constant for {@link #screenLayout}: a {@link #SCREENLAYOUT_SIZE_MASK}
    200      * value indicating the screen is at least approximately 320x426 dp units,
    201      * corresponds to the
    202      * <a href="{@docRoot}guide/topics/resources/providing-resources.html#ScreenSizeQualifier">small</a>
    203      * resource qualifier.
    204      * See <a href="{@docRoot}guide/practices/screens_support.html">Supporting
    205      * Multiple Screens</a> for more information. */
    206     public static final int SCREENLAYOUT_SIZE_SMALL = 0x01;
    207     /** Constant for {@link #screenLayout}: a {@link #SCREENLAYOUT_SIZE_MASK}
    208      * value indicating the screen is at least approximately 320x470 dp units,
    209      * corresponds to the
    210      * <a href="{@docRoot}guide/topics/resources/providing-resources.html#ScreenSizeQualifier">normal</a>
    211      * resource qualifier.
    212      * See <a href="{@docRoot}guide/practices/screens_support.html">Supporting
    213      * Multiple Screens</a> for more information. */
    214     public static final int SCREENLAYOUT_SIZE_NORMAL = 0x02;
    215     /** Constant for {@link #screenLayout}: a {@link #SCREENLAYOUT_SIZE_MASK}
    216      * value indicating the screen is at least approximately 480x640 dp units,
    217      * corresponds to the
    218      * <a href="{@docRoot}guide/topics/resources/providing-resources.html#ScreenSizeQualifier">large</a>
    219      * resource qualifier.
    220      * See <a href="{@docRoot}guide/practices/screens_support.html">Supporting
    221      * Multiple Screens</a> for more information. */
    222     public static final int SCREENLAYOUT_SIZE_LARGE = 0x03;
    223     /** Constant for {@link #screenLayout}: a {@link #SCREENLAYOUT_SIZE_MASK}
    224      * value indicating the screen is at least approximately 720x960 dp units,
    225      * corresponds to the
    226      * <a href="{@docRoot}guide/topics/resources/providing-resources.html#ScreenSizeQualifier">xlarge</a>
    227      * resource qualifier.
    228      * See <a href="{@docRoot}guide/practices/screens_support.html">Supporting
    229      * Multiple Screens</a> for more information.*/
    230     public static final int SCREENLAYOUT_SIZE_XLARGE = 0x04;
    231 
    232     /** Constant for {@link #screenLayout}: bits that encode the aspect ratio. */
    233     public static final int SCREENLAYOUT_LONG_MASK = 0x30;
    234     /** Constant for {@link #screenLayout}: a {@link #SCREENLAYOUT_LONG_MASK}
    235      * value indicating that no size has been set. */
    236     public static final int SCREENLAYOUT_LONG_UNDEFINED = 0x00;
    237     /** Constant for {@link #screenLayout}: a {@link #SCREENLAYOUT_LONG_MASK}
    238      * value that corresponds to the
    239      * <a href="{@docRoot}guide/topics/resources/providing-resources.html#ScreenAspectQualifier">notlong</a>
    240      * resource qualifier. */
    241     public static final int SCREENLAYOUT_LONG_NO = 0x10;
    242     /** Constant for {@link #screenLayout}: a {@link #SCREENLAYOUT_LONG_MASK}
    243      * value that corresponds to the
    244      * <a href="{@docRoot}guide/topics/resources/providing-resources.html#ScreenAspectQualifier">long</a>
    245      * resource qualifier. */
    246     public static final int SCREENLAYOUT_LONG_YES = 0x20;
    247 
    248     /** Constant for {@link #screenLayout}: bits that encode the layout direction. */
    249     public static final int SCREENLAYOUT_LAYOUTDIR_MASK = 0xC0;
    250     /** Constant for {@link #screenLayout}: bits shift to get the layout direction. */
    251     public static final int SCREENLAYOUT_LAYOUTDIR_SHIFT = 6;
    252     /** Constant for {@link #screenLayout}: a {@link #SCREENLAYOUT_LAYOUTDIR_MASK}
    253      * value indicating that no layout dir has been set. */
    254     public static final int SCREENLAYOUT_LAYOUTDIR_UNDEFINED = 0x00;
    255     /** Constant for {@link #screenLayout}: a {@link #SCREENLAYOUT_LAYOUTDIR_MASK}
    256      * value indicating that a layout dir has been set to LTR. */
    257     public static final int SCREENLAYOUT_LAYOUTDIR_LTR = 0x01 << SCREENLAYOUT_LAYOUTDIR_SHIFT;
    258     /** Constant for {@link #screenLayout}: a {@link #SCREENLAYOUT_LAYOUTDIR_MASK}
    259      * value indicating that a layout dir has been set to RTL. */
    260     public static final int SCREENLAYOUT_LAYOUTDIR_RTL = 0x02 << SCREENLAYOUT_LAYOUTDIR_SHIFT;
    261 
    262     /** Constant for {@link #screenLayout}: bits that encode roundness of the screen. */
    263     public static final int SCREENLAYOUT_ROUND_MASK = 0x300;
    264     /** @hide Constant for {@link #screenLayout}: bit shift to get to screen roundness bits */
    265     public static final int SCREENLAYOUT_ROUND_SHIFT = 8;
    266     /**
    267      * Constant for {@link #screenLayout}: a {@link #SCREENLAYOUT_ROUND_MASK} value indicating
    268      * that it is unknown whether or not the screen has a round shape.
    269      */
    270     public static final int SCREENLAYOUT_ROUND_UNDEFINED = 0x00;
    271     /**
    272      * Constant for {@link #screenLayout}: a {@link #SCREENLAYOUT_ROUND_MASK} value indicating
    273      * that the screen does not have a rounded shape.
    274      */
    275     public static final int SCREENLAYOUT_ROUND_NO = 0x1 << SCREENLAYOUT_ROUND_SHIFT;
    276     /**
    277      * Constant for {@link #screenLayout}: a {@link #SCREENLAYOUT_ROUND_MASK} value indicating
    278      * that the screen has a rounded shape. Corners may not be visible to the user;
    279      * developers should pay special attention to the {@link android.view.WindowInsets} delivered
    280      * to views for more information about ensuring content is not obscured.
    281      *
    282      * <p>Corresponds to the <code>-round</code> resource qualifier.</p>
    283      */
    284     public static final int SCREENLAYOUT_ROUND_YES = 0x2 << SCREENLAYOUT_ROUND_SHIFT;
    285 
    286     /** Constant for {@link #screenLayout}: a value indicating that screenLayout is undefined */
    287     public static final int SCREENLAYOUT_UNDEFINED = SCREENLAYOUT_SIZE_UNDEFINED |
    288             SCREENLAYOUT_LONG_UNDEFINED | SCREENLAYOUT_LAYOUTDIR_UNDEFINED |
    289             SCREENLAYOUT_ROUND_UNDEFINED;
    290 
    291     /**
    292      * Special flag we generate to indicate that the screen layout requires
    293      * us to use a compatibility mode for apps that are not modern layout
    294      * aware.
    295      * @hide
    296      */
    297     public static final int SCREENLAYOUT_COMPAT_NEEDED = 0x10000000;
    298 
    299     /**
    300      * Bit mask of overall layout of the screen.  Currently there are four
    301      * fields:
    302      * <p>The {@link #SCREENLAYOUT_SIZE_MASK} bits define the overall size
    303      * of the screen.  They may be one of
    304      * {@link #SCREENLAYOUT_SIZE_SMALL}, {@link #SCREENLAYOUT_SIZE_NORMAL},
    305      * {@link #SCREENLAYOUT_SIZE_LARGE}, or {@link #SCREENLAYOUT_SIZE_XLARGE}.</p>
    306      *
    307      * <p>The {@link #SCREENLAYOUT_LONG_MASK} defines whether the screen
    308      * is wider/taller than normal.  They may be one of
    309      * {@link #SCREENLAYOUT_LONG_NO} or {@link #SCREENLAYOUT_LONG_YES}.</p>
    310      *
    311      * <p>The {@link #SCREENLAYOUT_LAYOUTDIR_MASK} defines whether the screen layout
    312      * is either LTR or RTL.  They may be one of
    313      * {@link #SCREENLAYOUT_LAYOUTDIR_LTR} or {@link #SCREENLAYOUT_LAYOUTDIR_RTL}.</p>
    314      *
    315      * <p>The {@link #SCREENLAYOUT_ROUND_MASK} defines whether the screen has a rounded
    316      * shape. They may be one of {@link #SCREENLAYOUT_ROUND_NO} or {@link #SCREENLAYOUT_ROUND_YES}.
    317      * </p>
    318      *
    319      * <p>See <a href="{@docRoot}guide/practices/screens_support.html">Supporting
    320      * Multiple Screens</a> for more information.</p>
    321      */
    322     public int screenLayout;
    323 
    324     /**
    325      * Configuration relating to the windowing state of the object associated with this
    326      * Configuration. Contents of this field are not intended to affect resources, but need to be
    327      * communicated and propagated at the same time as the rest of Configuration.
    328      * @hide
    329      */
    330     @TestApi
    331     public final WindowConfiguration windowConfiguration = new WindowConfiguration();
    332 
    333     /** @hide */
    334     static public int resetScreenLayout(int curLayout) {
    335         return (curLayout&~(SCREENLAYOUT_LONG_MASK | SCREENLAYOUT_SIZE_MASK
    336                         | SCREENLAYOUT_COMPAT_NEEDED))
    337                 | (SCREENLAYOUT_LONG_YES | SCREENLAYOUT_SIZE_XLARGE);
    338     }
    339 
    340     /** @hide */
    341     static public int reduceScreenLayout(int curLayout, int longSizeDp, int shortSizeDp) {
    342         int screenLayoutSize;
    343         boolean screenLayoutLong;
    344         boolean screenLayoutCompatNeeded;
    345 
    346         // These semi-magic numbers define our compatibility modes for
    347         // applications with different screens.  These are guarantees to
    348         // app developers about the space they can expect for a particular
    349         // configuration.  DO NOT CHANGE!
    350         if (longSizeDp < 470) {
    351             // This is shorter than an HVGA normal density screen (which
    352             // is 480 pixels on its long side).
    353             screenLayoutSize = SCREENLAYOUT_SIZE_SMALL;
    354             screenLayoutLong = false;
    355             screenLayoutCompatNeeded = false;
    356         } else {
    357             // What size is this screen screen?
    358             if (longSizeDp >= 960 && shortSizeDp >= 720) {
    359                 // 1.5xVGA or larger screens at medium density are the point
    360                 // at which we consider it to be an extra large screen.
    361                 screenLayoutSize = SCREENLAYOUT_SIZE_XLARGE;
    362             } else if (longSizeDp >= 640 && shortSizeDp >= 480) {
    363                 // VGA or larger screens at medium density are the point
    364                 // at which we consider it to be a large screen.
    365                 screenLayoutSize = SCREENLAYOUT_SIZE_LARGE;
    366             } else {
    367                 screenLayoutSize = SCREENLAYOUT_SIZE_NORMAL;
    368             }
    369 
    370             // If this screen is wider than normal HVGA, or taller
    371             // than FWVGA, then for old apps we want to run in size
    372             // compatibility mode.
    373             if (shortSizeDp > 321 || longSizeDp > 570) {
    374                 screenLayoutCompatNeeded = true;
    375             } else {
    376                 screenLayoutCompatNeeded = false;
    377             }
    378 
    379             // Is this a long screen?
    380             if (((longSizeDp*3)/5) >= (shortSizeDp-1)) {
    381                 // Anything wider than WVGA (5:3) is considering to be long.
    382                 screenLayoutLong = true;
    383             } else {
    384                 screenLayoutLong = false;
    385             }
    386         }
    387 
    388         // Now reduce the last screenLayout to not be better than what we
    389         // have found.
    390         if (!screenLayoutLong) {
    391             curLayout = (curLayout&~SCREENLAYOUT_LONG_MASK) | SCREENLAYOUT_LONG_NO;
    392         }
    393         if (screenLayoutCompatNeeded) {
    394             curLayout |= Configuration.SCREENLAYOUT_COMPAT_NEEDED;
    395         }
    396         int curSize = curLayout&SCREENLAYOUT_SIZE_MASK;
    397         if (screenLayoutSize < curSize) {
    398             curLayout = (curLayout&~SCREENLAYOUT_SIZE_MASK) | screenLayoutSize;
    399         }
    400         return curLayout;
    401     }
    402 
    403     /** @hide */
    404     public static String configurationDiffToString(int diff) {
    405         ArrayList<String> list = new ArrayList<>();
    406         if ((diff & ActivityInfo.CONFIG_MCC) != 0) {
    407             list.add("CONFIG_MCC");
    408         }
    409         if ((diff & ActivityInfo.CONFIG_MNC) != 0) {
    410             list.add("CONFIG_MNC");
    411         }
    412         if ((diff & ActivityInfo.CONFIG_LOCALE) != 0) {
    413             list.add("CONFIG_LOCALE");
    414         }
    415         if ((diff & ActivityInfo.CONFIG_TOUCHSCREEN) != 0) {
    416             list.add("CONFIG_TOUCHSCREEN");
    417         }
    418         if ((diff & ActivityInfo.CONFIG_KEYBOARD) != 0) {
    419             list.add("CONFIG_KEYBOARD");
    420         }
    421         if ((diff & ActivityInfo.CONFIG_KEYBOARD_HIDDEN) != 0) {
    422             list.add("CONFIG_KEYBOARD_HIDDEN");
    423         }
    424         if ((diff & ActivityInfo.CONFIG_NAVIGATION) != 0) {
    425             list.add("CONFIG_NAVIGATION");
    426         }
    427         if ((diff & ActivityInfo.CONFIG_ORIENTATION) != 0) {
    428             list.add("CONFIG_ORIENTATION");
    429         }
    430         if ((diff & ActivityInfo.CONFIG_SCREEN_LAYOUT) != 0) {
    431             list.add("CONFIG_SCREEN_LAYOUT");
    432         }
    433         if ((diff & ActivityInfo.CONFIG_COLOR_MODE) != 0) {
    434             list.add("CONFIG_COLOR_MODE");
    435         }
    436         if ((diff & ActivityInfo.CONFIG_UI_MODE) != 0) {
    437             list.add("CONFIG_UI_MODE");
    438         }
    439         if ((diff & ActivityInfo.CONFIG_SCREEN_SIZE) != 0) {
    440             list.add("CONFIG_SCREEN_SIZE");
    441         }
    442         if ((diff & ActivityInfo.CONFIG_SMALLEST_SCREEN_SIZE) != 0) {
    443             list.add("CONFIG_SMALLEST_SCREEN_SIZE");
    444         }
    445         if ((diff & ActivityInfo.CONFIG_LAYOUT_DIRECTION) != 0) {
    446             list.add("CONFIG_LAYOUT_DIRECTION");
    447         }
    448         if ((diff & ActivityInfo.CONFIG_FONT_SCALE) != 0) {
    449             list.add("CONFIG_FONT_SCALE");
    450         }
    451         if ((diff & ActivityInfo.CONFIG_ASSETS_PATHS) != 0) {
    452             list.add("CONFIG_ASSETS_PATHS");
    453         }
    454         StringBuilder builder = new StringBuilder("{");
    455         for (int i = 0, n = list.size(); i < n; i++) {
    456             builder.append(list.get(i));
    457             if (i != n - 1) {
    458                 builder.append(", ");
    459             }
    460         }
    461         builder.append("}");
    462         return builder.toString();
    463     }
    464 
    465     /**
    466      * Check if the Configuration's current {@link #screenLayout} is at
    467      * least the given size.
    468      *
    469      * @param size The desired size, either {@link #SCREENLAYOUT_SIZE_SMALL},
    470      * {@link #SCREENLAYOUT_SIZE_NORMAL}, {@link #SCREENLAYOUT_SIZE_LARGE}, or
    471      * {@link #SCREENLAYOUT_SIZE_XLARGE}.
    472      * @return Returns true if the current screen layout size is at least
    473      * the given size.
    474      */
    475     public boolean isLayoutSizeAtLeast(int size) {
    476         int cur = screenLayout&SCREENLAYOUT_SIZE_MASK;
    477         if (cur == SCREENLAYOUT_SIZE_UNDEFINED) return false;
    478         return cur >= size;
    479     }
    480 
    481     /** Constant for {@link #touchscreen}: a value indicating that no value has been set. */
    482     public static final int TOUCHSCREEN_UNDEFINED = 0;
    483     /** Constant for {@link #touchscreen}, value corresponding to the
    484      * <a href="{@docRoot}guide/topics/resources/providing-resources.html#TouchscreenQualifier">notouch</a>
    485      * resource qualifier. */
    486     public static final int TOUCHSCREEN_NOTOUCH = 1;
    487     /** @deprecated Not currently supported or used. */
    488     @Deprecated public static final int TOUCHSCREEN_STYLUS = 2;
    489     /** Constant for {@link #touchscreen}, value corresponding to the
    490      * <a href="{@docRoot}guide/topics/resources/providing-resources.html#TouchscreenQualifier">finger</a>
    491      * resource qualifier. */
    492     public static final int TOUCHSCREEN_FINGER = 3;
    493 
    494     /**
    495      * The kind of touch screen attached to the device.
    496      * One of: {@link #TOUCHSCREEN_NOTOUCH}, {@link #TOUCHSCREEN_FINGER}.
    497      */
    498     public int touchscreen;
    499 
    500     /** Constant for {@link #keyboard}: a value indicating that no value has been set. */
    501     public static final int KEYBOARD_UNDEFINED = 0;
    502     /** Constant for {@link #keyboard}, value corresponding to the
    503      * <a href="{@docRoot}guide/topics/resources/providing-resources.html#ImeQualifier">nokeys</a>
    504      * resource qualifier. */
    505     public static final int KEYBOARD_NOKEYS = 1;
    506     /** Constant for {@link #keyboard}, value corresponding to the
    507      * <a href="{@docRoot}guide/topics/resources/providing-resources.html#ImeQualifier">qwerty</a>
    508      * resource qualifier. */
    509     public static final int KEYBOARD_QWERTY = 2;
    510     /** Constant for {@link #keyboard}, value corresponding to the
    511      * <a href="{@docRoot}guide/topics/resources/providing-resources.html#ImeQualifier">12key</a>
    512      * resource qualifier. */
    513     public static final int KEYBOARD_12KEY = 3;
    514 
    515     /**
    516      * The kind of keyboard attached to the device.
    517      * One of: {@link #KEYBOARD_NOKEYS}, {@link #KEYBOARD_QWERTY},
    518      * {@link #KEYBOARD_12KEY}.
    519      */
    520     public int keyboard;
    521 
    522     /** Constant for {@link #keyboardHidden}: a value indicating that no value has been set. */
    523     public static final int KEYBOARDHIDDEN_UNDEFINED = 0;
    524     /** Constant for {@link #keyboardHidden}, value corresponding to the
    525      * <a href="{@docRoot}guide/topics/resources/providing-resources.html#KeyboardAvailQualifier">keysexposed</a>
    526      * resource qualifier. */
    527     public static final int KEYBOARDHIDDEN_NO = 1;
    528     /** Constant for {@link #keyboardHidden}, value corresponding to the
    529      * <a href="{@docRoot}guide/topics/resources/providing-resources.html#KeyboardAvailQualifier">keyshidden</a>
    530      * resource qualifier. */
    531     public static final int KEYBOARDHIDDEN_YES = 2;
    532     /** Constant matching actual resource implementation. {@hide} */
    533     public static final int KEYBOARDHIDDEN_SOFT = 3;
    534 
    535     /**
    536      * A flag indicating whether any keyboard is available.  Unlike
    537      * {@link #hardKeyboardHidden}, this also takes into account a soft
    538      * keyboard, so if the hard keyboard is hidden but there is soft
    539      * keyboard available, it will be set to NO.  Value is one of:
    540      * {@link #KEYBOARDHIDDEN_NO}, {@link #KEYBOARDHIDDEN_YES}.
    541      */
    542     public int keyboardHidden;
    543 
    544     /** Constant for {@link #hardKeyboardHidden}: a value indicating that no value has been set. */
    545     public static final int HARDKEYBOARDHIDDEN_UNDEFINED = 0;
    546     /** Constant for {@link #hardKeyboardHidden}, value corresponding to the
    547      * physical keyboard being exposed. */
    548     public static final int HARDKEYBOARDHIDDEN_NO = 1;
    549     /** Constant for {@link #hardKeyboardHidden}, value corresponding to the
    550      * physical keyboard being hidden. */
    551     public static final int HARDKEYBOARDHIDDEN_YES = 2;
    552 
    553     /**
    554      * A flag indicating whether the hard keyboard has been hidden.  This will
    555      * be set on a device with a mechanism to hide the keyboard from the
    556      * user, when that mechanism is closed.  One of:
    557      * {@link #HARDKEYBOARDHIDDEN_NO}, {@link #HARDKEYBOARDHIDDEN_YES}.
    558      */
    559     public int hardKeyboardHidden;
    560 
    561     /** Constant for {@link #navigation}: a value indicating that no value has been set. */
    562     public static final int NAVIGATION_UNDEFINED = 0;
    563     /** Constant for {@link #navigation}, value corresponding to the
    564      * <a href="{@docRoot}guide/topics/resources/providing-resources.html#NavigationQualifier">nonav</a>
    565      * resource qualifier. */
    566     public static final int NAVIGATION_NONAV = 1;
    567     /** Constant for {@link #navigation}, value corresponding to the
    568      * <a href="{@docRoot}guide/topics/resources/providing-resources.html#NavigationQualifier">dpad</a>
    569      * resource qualifier. */
    570     public static final int NAVIGATION_DPAD = 2;
    571     /** Constant for {@link #navigation}, value corresponding to the
    572      * <a href="{@docRoot}guide/topics/resources/providing-resources.html#NavigationQualifier">trackball</a>
    573      * resource qualifier. */
    574     public static final int NAVIGATION_TRACKBALL = 3;
    575     /** Constant for {@link #navigation}, value corresponding to the
    576      * <a href="{@docRoot}guide/topics/resources/providing-resources.html#NavigationQualifier">wheel</a>
    577      * resource qualifier. */
    578     public static final int NAVIGATION_WHEEL = 4;
    579 
    580     /**
    581      * The kind of navigation method available on the device.
    582      * One of: {@link #NAVIGATION_NONAV}, {@link #NAVIGATION_DPAD},
    583      * {@link #NAVIGATION_TRACKBALL}, {@link #NAVIGATION_WHEEL}.
    584      */
    585     public int navigation;
    586 
    587     /** Constant for {@link #navigationHidden}: a value indicating that no value has been set. */
    588     public static final int NAVIGATIONHIDDEN_UNDEFINED = 0;
    589     /** Constant for {@link #navigationHidden}, value corresponding to the
    590      * <a href="{@docRoot}guide/topics/resources/providing-resources.html#NavAvailQualifier">navexposed</a>
    591      * resource qualifier. */
    592     public static final int NAVIGATIONHIDDEN_NO = 1;
    593     /** Constant for {@link #navigationHidden}, value corresponding to the
    594      * <a href="{@docRoot}guide/topics/resources/providing-resources.html#NavAvailQualifier">navhidden</a>
    595      * resource qualifier. */
    596     public static final int NAVIGATIONHIDDEN_YES = 2;
    597 
    598     /**
    599      * A flag indicating whether any 5-way or DPAD navigation available.
    600      * This will be set on a device with a mechanism to hide the navigation
    601      * controls from the user, when that mechanism is closed.  One of:
    602      * {@link #NAVIGATIONHIDDEN_NO}, {@link #NAVIGATIONHIDDEN_YES}.
    603      */
    604     public int navigationHidden;
    605 
    606     /** Constant for {@link #orientation}: a value indicating that no value has been set. */
    607     public static final int ORIENTATION_UNDEFINED = 0;
    608     /** Constant for {@link #orientation}, value corresponding to the
    609      * <a href="{@docRoot}guide/topics/resources/providing-resources.html#OrientationQualifier">port</a>
    610      * resource qualifier. */
    611     public static final int ORIENTATION_PORTRAIT = 1;
    612     /** Constant for {@link #orientation}, value corresponding to the
    613      * <a href="{@docRoot}guide/topics/resources/providing-resources.html#OrientationQualifier">land</a>
    614      * resource qualifier. */
    615     public static final int ORIENTATION_LANDSCAPE = 2;
    616     /** @deprecated Not currently supported or used. */
    617     @Deprecated public static final int ORIENTATION_SQUARE = 3;
    618 
    619     /**
    620      * Overall orientation of the screen.  May be one of
    621      * {@link #ORIENTATION_LANDSCAPE}, {@link #ORIENTATION_PORTRAIT}.
    622      */
    623     public int orientation;
    624 
    625     /** Constant for {@link #uiMode}: bits that encode the mode type. */
    626     public static final int UI_MODE_TYPE_MASK = 0x0f;
    627     /** Constant for {@link #uiMode}: a {@link #UI_MODE_TYPE_MASK}
    628      * value indicating that no mode type has been set. */
    629     public static final int UI_MODE_TYPE_UNDEFINED = 0x00;
    630     /** Constant for {@link #uiMode}: a {@link #UI_MODE_TYPE_MASK}
    631      * value that corresponds to
    632      * <a href="{@docRoot}guide/topics/resources/providing-resources.html#UiModeQualifier">no
    633      * UI mode</a> resource qualifier specified. */
    634     public static final int UI_MODE_TYPE_NORMAL = 0x01;
    635     /** Constant for {@link #uiMode}: a {@link #UI_MODE_TYPE_MASK}
    636      * value that corresponds to the
    637      * <a href="{@docRoot}guide/topics/resources/providing-resources.html#UiModeQualifier">desk</a>
    638      * resource qualifier. */
    639     public static final int UI_MODE_TYPE_DESK = 0x02;
    640     /** Constant for {@link #uiMode}: a {@link #UI_MODE_TYPE_MASK}
    641      * value that corresponds to the
    642      * <a href="{@docRoot}guide/topics/resources/providing-resources.html#UiModeQualifier">car</a>
    643      * resource qualifier. */
    644     public static final int UI_MODE_TYPE_CAR = 0x03;
    645     /** Constant for {@link #uiMode}: a {@link #UI_MODE_TYPE_MASK}
    646      * value that corresponds to the
    647      * <a href="{@docRoot}guide/topics/resources/providing-resources.html#UiModeQualifier">television</a>
    648      * resource qualifier. */
    649     public static final int UI_MODE_TYPE_TELEVISION = 0x04;
    650     /** Constant for {@link #uiMode}: a {@link #UI_MODE_TYPE_MASK}
    651      * value that corresponds to the
    652      * <a href="{@docRoot}guide/topics/resources/providing-resources.html#UiModeQualifier">appliance</a>
    653      * resource qualifier. */
    654     public static final int UI_MODE_TYPE_APPLIANCE = 0x05;
    655     /** Constant for {@link #uiMode}: a {@link #UI_MODE_TYPE_MASK}
    656      * value that corresponds to the
    657      * <a href="{@docRoot}guide/topics/resources/providing-resources.html#UiModeQualifier">watch</a>
    658      * resource qualifier. */
    659     public static final int UI_MODE_TYPE_WATCH = 0x06;
    660     /** Constant for {@link #uiMode}: a {@link #UI_MODE_TYPE_MASK}
    661      * value that corresponds to the
    662      * <a href="{@docRoot}guide/topics/resources/providing-resources.html#UiModeQualifier">vrheadset</a>
    663      * resource qualifier. */
    664     public static final int UI_MODE_TYPE_VR_HEADSET = 0x07;
    665 
    666     /** Constant for {@link #uiMode}: bits that encode the night mode. */
    667     public static final int UI_MODE_NIGHT_MASK = 0x30;
    668     /** Constant for {@link #uiMode}: a {@link #UI_MODE_NIGHT_MASK}
    669      * value indicating that no mode type has been set. */
    670     public static final int UI_MODE_NIGHT_UNDEFINED = 0x00;
    671     /** Constant for {@link #uiMode}: a {@link #UI_MODE_NIGHT_MASK}
    672      * value that corresponds to the
    673      * <a href="{@docRoot}guide/topics/resources/providing-resources.html#NightQualifier">notnight</a>
    674      * resource qualifier. */
    675     public static final int UI_MODE_NIGHT_NO = 0x10;
    676     /** Constant for {@link #uiMode}: a {@link #UI_MODE_NIGHT_MASK}
    677      * value that corresponds to the
    678      * <a href="{@docRoot}guide/topics/resources/providing-resources.html#NightQualifier">night</a>
    679      * resource qualifier. */
    680     public static final int UI_MODE_NIGHT_YES = 0x20;
    681 
    682     /**
    683      * Bit mask of the ui mode.  Currently there are two fields:
    684      * <p>The {@link #UI_MODE_TYPE_MASK} bits define the overall ui mode of the
    685      * device. They may be one of {@link #UI_MODE_TYPE_UNDEFINED},
    686      * {@link #UI_MODE_TYPE_NORMAL}, {@link #UI_MODE_TYPE_DESK},
    687      * {@link #UI_MODE_TYPE_CAR}, {@link #UI_MODE_TYPE_TELEVISION},
    688      * {@link #UI_MODE_TYPE_APPLIANCE}, {@link #UI_MODE_TYPE_WATCH},
    689      * or {@link #UI_MODE_TYPE_VR_HEADSET}.
    690      *
    691      * <p>The {@link #UI_MODE_NIGHT_MASK} defines whether the screen
    692      * is in a special mode. They may be one of {@link #UI_MODE_NIGHT_UNDEFINED},
    693      * {@link #UI_MODE_NIGHT_NO} or {@link #UI_MODE_NIGHT_YES}.
    694      */
    695     public int uiMode;
    696 
    697     /**
    698      * Default value for {@link #screenWidthDp} indicating that no width
    699      * has been specified.
    700      */
    701     public static final int SCREEN_WIDTH_DP_UNDEFINED = 0;
    702 
    703     /**
    704      * The current width of the available screen space, in dp units,
    705      * corresponding to
    706      * <a href="{@docRoot}guide/topics/resources/providing-resources.html#ScreenWidthQualifier">screen
    707      * width</a> resource qualifier.  Set to
    708      * {@link #SCREEN_WIDTH_DP_UNDEFINED} if no width is specified.
    709      */
    710     public int screenWidthDp;
    711 
    712     /**
    713      * Default value for {@link #screenHeightDp} indicating that no width
    714      * has been specified.
    715      */
    716     public static final int SCREEN_HEIGHT_DP_UNDEFINED = 0;
    717 
    718     /**
    719      * The current height of the available screen space, in dp units,
    720      * corresponding to
    721      * <a href="{@docRoot}guide/topics/resources/providing-resources.html#ScreenHeightQualifier">screen
    722      * height</a> resource qualifier.  Set to
    723      * {@link #SCREEN_HEIGHT_DP_UNDEFINED} if no height is specified.
    724      */
    725     public int screenHeightDp;
    726 
    727     /**
    728      * Default value for {@link #smallestScreenWidthDp} indicating that no width
    729      * has been specified.
    730      */
    731     public static final int SMALLEST_SCREEN_WIDTH_DP_UNDEFINED = 0;
    732 
    733     /**
    734      * The smallest screen size an application will see in normal operation,
    735      * corresponding to
    736      * <a href="{@docRoot}guide/topics/resources/providing-resources.html#SmallestScreenWidthQualifier">smallest
    737      * screen width</a> resource qualifier.
    738      * This is the smallest value of both screenWidthDp and screenHeightDp
    739      * in both portrait and landscape.  Set to
    740      * {@link #SMALLEST_SCREEN_WIDTH_DP_UNDEFINED} if no width is specified.
    741      */
    742     public int smallestScreenWidthDp;
    743 
    744     /**
    745      * Default value for {@link #densityDpi} indicating that no width
    746      * has been specified.
    747      */
    748     public static final int DENSITY_DPI_UNDEFINED = 0;
    749 
    750     /**
    751      * Value for {@link #densityDpi} for resources that scale to any density (vector drawables).
    752      * {@hide}
    753      */
    754     public static final int DENSITY_DPI_ANY = 0xfffe;
    755 
    756     /**
    757      * Value for {@link #densityDpi} for resources that are not meant to be scaled.
    758      * {@hide}
    759      */
    760     public static final int DENSITY_DPI_NONE = 0xffff;
    761 
    762     /**
    763      * The target screen density being rendered to,
    764      * corresponding to
    765      * <a href="{@docRoot}guide/topics/resources/providing-resources.html#DensityQualifier">density</a>
    766      * resource qualifier.  Set to
    767      * {@link #DENSITY_DPI_UNDEFINED} if no density is specified.
    768      */
    769     public int densityDpi;
    770 
    771     /** @hide Hack to get this information from WM to app running in compat mode. */
    772     public int compatScreenWidthDp;
    773     /** @hide Hack to get this information from WM to app running in compat mode. */
    774     public int compatScreenHeightDp;
    775     /** @hide Hack to get this information from WM to app running in compat mode. */
    776     public int compatSmallestScreenWidthDp;
    777 
    778     /**
    779      * An undefined assetsSeq. This will not override an existing assetsSeq.
    780      * @hide
    781      */
    782     public static final int ASSETS_SEQ_UNDEFINED = 0;
    783 
    784     /**
    785      * Internal counter that allows us to piggyback off the configuration change mechanism to
    786      * signal to apps that the the assets for an Application have changed. A difference in these
    787      * between two Configurations will yield a diff flag of
    788      * {@link ActivityInfo#CONFIG_ASSETS_PATHS}.
    789      * @hide
    790      */
    791     public int assetsSeq;
    792 
    793     /**
    794      * @hide Internal book-keeping.
    795      */
    796     public int seq;
    797 
    798     /** @hide */
    799     @IntDef(flag = true, prefix = { "NATIVE_CONFIG_" }, value = {
    800             NATIVE_CONFIG_MCC,
    801             NATIVE_CONFIG_MNC,
    802             NATIVE_CONFIG_LOCALE,
    803             NATIVE_CONFIG_TOUCHSCREEN,
    804             NATIVE_CONFIG_KEYBOARD,
    805             NATIVE_CONFIG_KEYBOARD_HIDDEN,
    806             NATIVE_CONFIG_NAVIGATION,
    807             NATIVE_CONFIG_ORIENTATION,
    808             NATIVE_CONFIG_DENSITY,
    809             NATIVE_CONFIG_SCREEN_SIZE,
    810             NATIVE_CONFIG_VERSION,
    811             NATIVE_CONFIG_SCREEN_LAYOUT,
    812             NATIVE_CONFIG_UI_MODE,
    813             NATIVE_CONFIG_SMALLEST_SCREEN_SIZE,
    814             NATIVE_CONFIG_LAYOUTDIR,
    815             NATIVE_CONFIG_COLOR_MODE,
    816     })
    817     @Retention(RetentionPolicy.SOURCE)
    818     public @interface NativeConfig {}
    819 
    820     /** @hide Native-specific bit mask for MCC config; DO NOT USE UNLESS YOU ARE SURE. */
    821     public static final int NATIVE_CONFIG_MCC = 0x0001;
    822     /** @hide Native-specific bit mask for MNC config; DO NOT USE UNLESS YOU ARE SURE. */
    823     public static final int NATIVE_CONFIG_MNC = 0x0002;
    824     /** @hide Native-specific bit mask for LOCALE config; DO NOT USE UNLESS YOU ARE SURE. */
    825     public static final int NATIVE_CONFIG_LOCALE = 0x0004;
    826     /** @hide Native-specific bit mask for TOUCHSCREEN config; DO NOT USE UNLESS YOU ARE SURE. */
    827     public static final int NATIVE_CONFIG_TOUCHSCREEN = 0x0008;
    828     /** @hide Native-specific bit mask for KEYBOARD config; DO NOT USE UNLESS YOU ARE SURE. */
    829     public static final int NATIVE_CONFIG_KEYBOARD = 0x0010;
    830     /** @hide Native-specific bit mask for KEYBOARD_HIDDEN config; DO NOT USE UNLESS YOU
    831      * ARE SURE. */
    832     public static final int NATIVE_CONFIG_KEYBOARD_HIDDEN = 0x0020;
    833     /** @hide Native-specific bit mask for NAVIGATION config; DO NOT USE UNLESS YOU ARE SURE. */
    834     public static final int NATIVE_CONFIG_NAVIGATION = 0x0040;
    835     /** @hide Native-specific bit mask for ORIENTATION config; DO NOT USE UNLESS YOU ARE SURE. */
    836     public static final int NATIVE_CONFIG_ORIENTATION = 0x0080;
    837     /** @hide Native-specific bit mask for DENSITY config; DO NOT USE UNLESS YOU ARE SURE. */
    838     public static final int NATIVE_CONFIG_DENSITY = 0x0100;
    839     /** @hide Native-specific bit mask for SCREEN_SIZE config; DO NOT USE UNLESS YOU ARE SURE. */
    840     public static final int NATIVE_CONFIG_SCREEN_SIZE = 0x0200;
    841     /** @hide Native-specific bit mask for VERSION config; DO NOT USE UNLESS YOU ARE SURE. */
    842     public static final int NATIVE_CONFIG_VERSION = 0x0400;
    843     /** @hide Native-specific bit mask for SCREEN_LAYOUT config; DO NOT USE UNLESS YOU ARE SURE. */
    844     public static final int NATIVE_CONFIG_SCREEN_LAYOUT = 0x0800;
    845     /** @hide Native-specific bit mask for UI_MODE config; DO NOT USE UNLESS YOU ARE SURE. */
    846     public static final int NATIVE_CONFIG_UI_MODE = 0x1000;
    847     /** @hide Native-specific bit mask for SMALLEST_SCREEN_SIZE config; DO NOT USE UNLESS YOU
    848      * ARE SURE. */
    849     public static final int NATIVE_CONFIG_SMALLEST_SCREEN_SIZE = 0x2000;
    850     /** @hide Native-specific bit mask for LAYOUTDIR config ; DO NOT USE UNLESS YOU ARE SURE.*/
    851     public static final int NATIVE_CONFIG_LAYOUTDIR = 0x4000;
    852     /** @hide Native-specific bit mask for COLOR_MODE config ; DO NOT USE UNLESS YOU ARE SURE.*/
    853     public static final int NATIVE_CONFIG_COLOR_MODE = 0x10000;
    854 
    855     /**
    856      * <p>Construct an invalid Configuration. This state is only suitable for constructing a
    857      * Configuration delta that will be applied to some valid Configuration object. In order to
    858      * create a valid standalone Configuration, you must call {@link #setToDefaults}. </p>
    859      *
    860      * <p>Example:</p>
    861      * <pre class="prettyprint">
    862      *     Configuration validConfig = new Configuration();
    863      *     validConfig.setToDefaults();
    864      *
    865      *     Configuration deltaOnlyConfig = new Configuration();
    866      *     deltaOnlyConfig.orientation = Configuration.ORIENTATION_LANDSCAPE;
    867      *
    868      *     validConfig.updateFrom(deltaOnlyConfig);
    869      * </pre>
    870      */
    871     public Configuration() {
    872         unset();
    873     }
    874 
    875     /**
    876      * Makes a deep copy suitable for modification.
    877      */
    878     public Configuration(Configuration o) {
    879         setTo(o);
    880     }
    881 
    882     /* This brings mLocaleList in sync with locale in case a user of the older API who doesn't know
    883      * about setLocales() has changed locale directly. */
    884     private void fixUpLocaleList() {
    885         if ((locale == null && !mLocaleList.isEmpty()) ||
    886                 (locale != null && !locale.equals(mLocaleList.get(0)))) {
    887             mLocaleList = locale == null ? LocaleList.getEmptyLocaleList() : new LocaleList(locale);
    888         }
    889     }
    890 
    891     /**
    892      * Sets the fields in this object to those in the given Configuration.
    893      *
    894      * @param o The Configuration object used to set the values of this Configuration's fields.
    895      */
    896     public void setTo(Configuration o) {
    897         fontScale = o.fontScale;
    898         mcc = o.mcc;
    899         mnc = o.mnc;
    900         locale = o.locale == null ? null : (Locale) o.locale.clone();
    901         o.fixUpLocaleList();
    902         mLocaleList = o.mLocaleList;
    903         userSetLocale = o.userSetLocale;
    904         touchscreen = o.touchscreen;
    905         keyboard = o.keyboard;
    906         keyboardHidden = o.keyboardHidden;
    907         hardKeyboardHidden = o.hardKeyboardHidden;
    908         navigation = o.navigation;
    909         navigationHidden = o.navigationHidden;
    910         orientation = o.orientation;
    911         screenLayout = o.screenLayout;
    912         colorMode = o.colorMode;
    913         uiMode = o.uiMode;
    914         screenWidthDp = o.screenWidthDp;
    915         screenHeightDp = o.screenHeightDp;
    916         smallestScreenWidthDp = o.smallestScreenWidthDp;
    917         densityDpi = o.densityDpi;
    918         compatScreenWidthDp = o.compatScreenWidthDp;
    919         compatScreenHeightDp = o.compatScreenHeightDp;
    920         compatSmallestScreenWidthDp = o.compatSmallestScreenWidthDp;
    921         assetsSeq = o.assetsSeq;
    922         seq = o.seq;
    923         windowConfiguration.setTo(o.windowConfiguration);
    924     }
    925 
    926     public String toString() {
    927         StringBuilder sb = new StringBuilder(128);
    928         sb.append("{");
    929         sb.append(fontScale);
    930         sb.append(" ");
    931         if (mcc != 0) {
    932             sb.append(mcc);
    933             sb.append("mcc");
    934         } else {
    935             sb.append("?mcc");
    936         }
    937         if (mnc != 0) {
    938             sb.append(mnc);
    939             sb.append("mnc");
    940         } else {
    941             sb.append("?mnc");
    942         }
    943         fixUpLocaleList();
    944         if (!mLocaleList.isEmpty()) {
    945             sb.append(" ");
    946             sb.append(mLocaleList);
    947         } else {
    948             sb.append(" ?localeList");
    949         }
    950         int layoutDir = (screenLayout&SCREENLAYOUT_LAYOUTDIR_MASK);
    951         switch (layoutDir) {
    952             case SCREENLAYOUT_LAYOUTDIR_UNDEFINED: sb.append(" ?layoutDir"); break;
    953             case SCREENLAYOUT_LAYOUTDIR_LTR: sb.append(" ldltr"); break;
    954             case SCREENLAYOUT_LAYOUTDIR_RTL: sb.append(" ldrtl"); break;
    955             default: sb.append(" layoutDir=");
    956                 sb.append(layoutDir >> SCREENLAYOUT_LAYOUTDIR_SHIFT); break;
    957         }
    958         if (smallestScreenWidthDp != SMALLEST_SCREEN_WIDTH_DP_UNDEFINED) {
    959             sb.append(" sw"); sb.append(smallestScreenWidthDp); sb.append("dp");
    960         } else {
    961             sb.append(" ?swdp");
    962         }
    963         if (screenWidthDp != SCREEN_WIDTH_DP_UNDEFINED) {
    964             sb.append(" w"); sb.append(screenWidthDp); sb.append("dp");
    965         } else {
    966             sb.append(" ?wdp");
    967         }
    968         if (screenHeightDp != SCREEN_HEIGHT_DP_UNDEFINED) {
    969             sb.append(" h"); sb.append(screenHeightDp); sb.append("dp");
    970         } else {
    971             sb.append(" ?hdp");
    972         }
    973         if (densityDpi != DENSITY_DPI_UNDEFINED) {
    974             sb.append(" "); sb.append(densityDpi); sb.append("dpi");
    975         } else {
    976             sb.append(" ?density");
    977         }
    978         switch ((screenLayout&SCREENLAYOUT_SIZE_MASK)) {
    979             case SCREENLAYOUT_SIZE_UNDEFINED: sb.append(" ?lsize"); break;
    980             case SCREENLAYOUT_SIZE_SMALL: sb.append(" smll"); break;
    981             case SCREENLAYOUT_SIZE_NORMAL: sb.append(" nrml"); break;
    982             case SCREENLAYOUT_SIZE_LARGE: sb.append(" lrg"); break;
    983             case SCREENLAYOUT_SIZE_XLARGE: sb.append(" xlrg"); break;
    984             default: sb.append(" layoutSize=");
    985                     sb.append(screenLayout&SCREENLAYOUT_SIZE_MASK); break;
    986         }
    987         switch ((screenLayout&SCREENLAYOUT_LONG_MASK)) {
    988             case SCREENLAYOUT_LONG_UNDEFINED: sb.append(" ?long"); break;
    989             case SCREENLAYOUT_LONG_NO: /* not-long is not interesting to print */ break;
    990             case SCREENLAYOUT_LONG_YES: sb.append(" long"); break;
    991             default: sb.append(" layoutLong=");
    992                     sb.append(screenLayout&SCREENLAYOUT_LONG_MASK); break;
    993         }
    994         switch ((colorMode &COLOR_MODE_HDR_MASK)) {
    995             case COLOR_MODE_HDR_UNDEFINED: sb.append(" ?ldr"); break; // most likely not HDR
    996             case COLOR_MODE_HDR_NO: /* ldr is not interesting to print */ break;
    997             case COLOR_MODE_HDR_YES: sb.append(" hdr"); break;
    998             default: sb.append(" dynamicRange=");
    999                 sb.append(colorMode &COLOR_MODE_HDR_MASK); break;
   1000         }
   1001         switch ((colorMode &COLOR_MODE_WIDE_COLOR_GAMUT_MASK)) {
   1002             case COLOR_MODE_WIDE_COLOR_GAMUT_UNDEFINED: sb.append(" ?wideColorGamut"); break;
   1003             case COLOR_MODE_WIDE_COLOR_GAMUT_NO: /* not wide is not interesting to print */ break;
   1004             case COLOR_MODE_WIDE_COLOR_GAMUT_YES: sb.append(" widecg"); break;
   1005             default: sb.append(" wideColorGamut=");
   1006                 sb.append(colorMode &COLOR_MODE_WIDE_COLOR_GAMUT_MASK); break;
   1007         }
   1008         switch (orientation) {
   1009             case ORIENTATION_UNDEFINED: sb.append(" ?orien"); break;
   1010             case ORIENTATION_LANDSCAPE: sb.append(" land"); break;
   1011             case ORIENTATION_PORTRAIT: sb.append(" port"); break;
   1012             default: sb.append(" orien="); sb.append(orientation); break;
   1013         }
   1014         switch ((uiMode&UI_MODE_TYPE_MASK)) {
   1015             case UI_MODE_TYPE_UNDEFINED: sb.append(" ?uimode"); break;
   1016             case UI_MODE_TYPE_NORMAL: /* normal is not interesting to print */ break;
   1017             case UI_MODE_TYPE_DESK: sb.append(" desk"); break;
   1018             case UI_MODE_TYPE_CAR: sb.append(" car"); break;
   1019             case UI_MODE_TYPE_TELEVISION: sb.append(" television"); break;
   1020             case UI_MODE_TYPE_APPLIANCE: sb.append(" appliance"); break;
   1021             case UI_MODE_TYPE_WATCH: sb.append(" watch"); break;
   1022             case UI_MODE_TYPE_VR_HEADSET: sb.append(" vrheadset"); break;
   1023             default: sb.append(" uimode="); sb.append(uiMode&UI_MODE_TYPE_MASK); break;
   1024         }
   1025         switch ((uiMode&UI_MODE_NIGHT_MASK)) {
   1026             case UI_MODE_NIGHT_UNDEFINED: sb.append(" ?night"); break;
   1027             case UI_MODE_NIGHT_NO: /* not-night is not interesting to print */ break;
   1028             case UI_MODE_NIGHT_YES: sb.append(" night"); break;
   1029             default: sb.append(" night="); sb.append(uiMode&UI_MODE_NIGHT_MASK); break;
   1030         }
   1031         switch (touchscreen) {
   1032             case TOUCHSCREEN_UNDEFINED: sb.append(" ?touch"); break;
   1033             case TOUCHSCREEN_NOTOUCH: sb.append(" -touch"); break;
   1034             case TOUCHSCREEN_STYLUS: sb.append(" stylus"); break;
   1035             case TOUCHSCREEN_FINGER: sb.append(" finger"); break;
   1036             default: sb.append(" touch="); sb.append(touchscreen); break;
   1037         }
   1038         switch (keyboard) {
   1039             case KEYBOARD_UNDEFINED: sb.append(" ?keyb"); break;
   1040             case KEYBOARD_NOKEYS: sb.append(" -keyb"); break;
   1041             case KEYBOARD_QWERTY: sb.append(" qwerty"); break;
   1042             case KEYBOARD_12KEY: sb.append(" 12key"); break;
   1043             default: sb.append(" keys="); sb.append(keyboard); break;
   1044         }
   1045         switch (keyboardHidden) {
   1046             case KEYBOARDHIDDEN_UNDEFINED: sb.append("/?"); break;
   1047             case KEYBOARDHIDDEN_NO: sb.append("/v"); break;
   1048             case KEYBOARDHIDDEN_YES: sb.append("/h"); break;
   1049             case KEYBOARDHIDDEN_SOFT: sb.append("/s"); break;
   1050             default: sb.append("/"); sb.append(keyboardHidden); break;
   1051         }
   1052         switch (hardKeyboardHidden) {
   1053             case HARDKEYBOARDHIDDEN_UNDEFINED: sb.append("/?"); break;
   1054             case HARDKEYBOARDHIDDEN_NO: sb.append("/v"); break;
   1055             case HARDKEYBOARDHIDDEN_YES: sb.append("/h"); break;
   1056             default: sb.append("/"); sb.append(hardKeyboardHidden); break;
   1057         }
   1058         switch (navigation) {
   1059             case NAVIGATION_UNDEFINED: sb.append(" ?nav"); break;
   1060             case NAVIGATION_NONAV: sb.append(" -nav"); break;
   1061             case NAVIGATION_DPAD: sb.append(" dpad"); break;
   1062             case NAVIGATION_TRACKBALL: sb.append(" tball"); break;
   1063             case NAVIGATION_WHEEL: sb.append(" wheel"); break;
   1064             default: sb.append(" nav="); sb.append(navigation); break;
   1065         }
   1066         switch (navigationHidden) {
   1067             case NAVIGATIONHIDDEN_UNDEFINED: sb.append("/?"); break;
   1068             case NAVIGATIONHIDDEN_NO: sb.append("/v"); break;
   1069             case NAVIGATIONHIDDEN_YES: sb.append("/h"); break;
   1070             default: sb.append("/"); sb.append(navigationHidden); break;
   1071         }
   1072         sb.append(" winConfig="); sb.append(windowConfiguration);
   1073         if (assetsSeq != 0) {
   1074             sb.append(" as.").append(assetsSeq);
   1075         }
   1076         if (seq != 0) {
   1077             sb.append(" s.").append(seq);
   1078         }
   1079         sb.append('}');
   1080         return sb.toString();
   1081     }
   1082 
   1083     /**
   1084      * Write to a protocol buffer output stream.
   1085      * Protocol buffer message definition at {@link android.content.ConfigurationProto}
   1086      *
   1087      * @param protoOutputStream Stream to write the Configuration object to.
   1088      * @param fieldId           Field Id of the Configuration as defined in the parent message
   1089      * @hide
   1090      */
   1091     public void writeToProto(ProtoOutputStream protoOutputStream, long fieldId) {
   1092         final long token = protoOutputStream.start(fieldId);
   1093         protoOutputStream.write(FONT_SCALE, fontScale);
   1094         protoOutputStream.write(MCC, mcc);
   1095         protoOutputStream.write(MNC, mnc);
   1096         mLocaleList.writeToProto(protoOutputStream, LOCALES);
   1097         protoOutputStream.write(SCREEN_LAYOUT, screenLayout);
   1098         protoOutputStream.write(COLOR_MODE, colorMode);
   1099         protoOutputStream.write(TOUCHSCREEN, touchscreen);
   1100         protoOutputStream.write(KEYBOARD, keyboard);
   1101         protoOutputStream.write(KEYBOARD_HIDDEN, keyboardHidden);
   1102         protoOutputStream.write(HARD_KEYBOARD_HIDDEN, hardKeyboardHidden);
   1103         protoOutputStream.write(NAVIGATION, navigation);
   1104         protoOutputStream.write(NAVIGATION_HIDDEN, navigationHidden);
   1105         protoOutputStream.write(ORIENTATION, orientation);
   1106         protoOutputStream.write(UI_MODE, uiMode);
   1107         protoOutputStream.write(SCREEN_WIDTH_DP, screenWidthDp);
   1108         protoOutputStream.write(SCREEN_HEIGHT_DP, screenHeightDp);
   1109         protoOutputStream.write(SMALLEST_SCREEN_WIDTH_DP, smallestScreenWidthDp);
   1110         protoOutputStream.write(DENSITY_DPI, densityDpi);
   1111         windowConfiguration.writeToProto(protoOutputStream, WINDOW_CONFIGURATION);
   1112         protoOutputStream.end(token);
   1113     }
   1114 
   1115     /**
   1116      * Write full {@link android.content.ResourcesConfigurationProto} to protocol buffer output
   1117      * stream.
   1118      *
   1119      * @param protoOutputStream Stream to write the Configuration object to.
   1120      * @param fieldId           Field Id of the Configuration as defined in the parent message
   1121      * @param metrics           Current display information
   1122      * @hide
   1123      */
   1124     public void writeResConfigToProto(ProtoOutputStream protoOutputStream, long fieldId,
   1125             DisplayMetrics metrics) {
   1126         final int width, height;
   1127         if (metrics.widthPixels >= metrics.heightPixels) {
   1128             width = metrics.widthPixels;
   1129             height = metrics.heightPixels;
   1130         } else {
   1131             //noinspection SuspiciousNameCombination
   1132             width = metrics.heightPixels;
   1133             //noinspection SuspiciousNameCombination
   1134             height = metrics.widthPixels;
   1135         }
   1136 
   1137         final long token = protoOutputStream.start(fieldId);
   1138         writeToProto(protoOutputStream, CONFIGURATION);
   1139         protoOutputStream.write(SDK_VERSION, Build.VERSION.RESOURCES_SDK_INT);
   1140         protoOutputStream.write(SCREEN_WIDTH_PX, width);
   1141         protoOutputStream.write(SCREEN_HEIGHT_PX, height);
   1142         protoOutputStream.end(token);
   1143     }
   1144 
   1145     /**
   1146      * Convert the UI mode to a human readable format.
   1147      * @hide
   1148      */
   1149     public static String uiModeToString(int uiMode) {
   1150         switch (uiMode) {
   1151             case UI_MODE_TYPE_UNDEFINED:
   1152                 return "UI_MODE_TYPE_UNDEFINED";
   1153             case UI_MODE_TYPE_NORMAL:
   1154                 return "UI_MODE_TYPE_NORMAL";
   1155             case UI_MODE_TYPE_DESK:
   1156                 return "UI_MODE_TYPE_DESK";
   1157             case UI_MODE_TYPE_CAR:
   1158                 return "UI_MODE_TYPE_CAR";
   1159             case UI_MODE_TYPE_TELEVISION:
   1160                 return "UI_MODE_TYPE_TELEVISION";
   1161             case UI_MODE_TYPE_APPLIANCE:
   1162                 return "UI_MODE_TYPE_APPLIANCE";
   1163             case UI_MODE_TYPE_WATCH:
   1164                 return "UI_MODE_TYPE_WATCH";
   1165             case UI_MODE_TYPE_VR_HEADSET:
   1166                 return "UI_MODE_TYPE_VR_HEADSET";
   1167             default:
   1168                 return Integer.toString(uiMode);
   1169         }
   1170     }
   1171 
   1172     /**
   1173      * Set this object to the system defaults.
   1174      */
   1175     public void setToDefaults() {
   1176         fontScale = 1;
   1177         mcc = mnc = 0;
   1178         mLocaleList = LocaleList.getEmptyLocaleList();
   1179         locale = null;
   1180         userSetLocale = false;
   1181         touchscreen = TOUCHSCREEN_UNDEFINED;
   1182         keyboard = KEYBOARD_UNDEFINED;
   1183         keyboardHidden = KEYBOARDHIDDEN_UNDEFINED;
   1184         hardKeyboardHidden = HARDKEYBOARDHIDDEN_UNDEFINED;
   1185         navigation = NAVIGATION_UNDEFINED;
   1186         navigationHidden = NAVIGATIONHIDDEN_UNDEFINED;
   1187         orientation = ORIENTATION_UNDEFINED;
   1188         screenLayout = SCREENLAYOUT_UNDEFINED;
   1189         colorMode = COLOR_MODE_UNDEFINED;
   1190         uiMode = UI_MODE_TYPE_UNDEFINED;
   1191         screenWidthDp = compatScreenWidthDp = SCREEN_WIDTH_DP_UNDEFINED;
   1192         screenHeightDp = compatScreenHeightDp = SCREEN_HEIGHT_DP_UNDEFINED;
   1193         smallestScreenWidthDp = compatSmallestScreenWidthDp = SMALLEST_SCREEN_WIDTH_DP_UNDEFINED;
   1194         densityDpi = DENSITY_DPI_UNDEFINED;
   1195         assetsSeq = ASSETS_SEQ_UNDEFINED;
   1196         seq = 0;
   1197         windowConfiguration.setToDefaults();
   1198     }
   1199 
   1200     /**
   1201      * Set this object to completely undefined.
   1202      * @hide
   1203      */
   1204     public void unset() {
   1205         setToDefaults();
   1206         fontScale = 0;
   1207     }
   1208 
   1209     /** {@hide} */
   1210     @Deprecated public void makeDefault() {
   1211         setToDefaults();
   1212     }
   1213 
   1214     /**
   1215      * Copies the fields from delta into this Configuration object, keeping
   1216      * track of which ones have changed. Any undefined fields in {@code delta}
   1217      * are ignored and not copied in to the current Configuration.
   1218      *
   1219      * @return a bit mask of the changed fields, as per {@link #diff}
   1220      */
   1221     public @Config int updateFrom(@NonNull Configuration delta) {
   1222         int changed = 0;
   1223         if (delta.fontScale > 0 && fontScale != delta.fontScale) {
   1224             changed |= ActivityInfo.CONFIG_FONT_SCALE;
   1225             fontScale = delta.fontScale;
   1226         }
   1227         if (delta.mcc != 0 && mcc != delta.mcc) {
   1228             changed |= ActivityInfo.CONFIG_MCC;
   1229             mcc = delta.mcc;
   1230         }
   1231         if (delta.mnc != 0 && mnc != delta.mnc) {
   1232             changed |= ActivityInfo.CONFIG_MNC;
   1233             mnc = delta.mnc;
   1234         }
   1235         fixUpLocaleList();
   1236         delta.fixUpLocaleList();
   1237         if (!delta.mLocaleList.isEmpty() && !mLocaleList.equals(delta.mLocaleList)) {
   1238             changed |= ActivityInfo.CONFIG_LOCALE;
   1239             mLocaleList = delta.mLocaleList;
   1240             // delta.locale can't be null, since delta.mLocaleList is not empty.
   1241             if (!delta.locale.equals(locale)) {
   1242                 locale = (Locale) delta.locale.clone();
   1243                 // If locale has changed, then layout direction is also changed ...
   1244                 changed |= ActivityInfo.CONFIG_LAYOUT_DIRECTION;
   1245                 // ... and we need to update the layout direction (represented by the first
   1246                 // 2 most significant bits in screenLayout).
   1247                 setLayoutDirection(locale);
   1248             }
   1249         }
   1250         final int deltaScreenLayoutDir = delta.screenLayout & SCREENLAYOUT_LAYOUTDIR_MASK;
   1251         if (deltaScreenLayoutDir != SCREENLAYOUT_LAYOUTDIR_UNDEFINED &&
   1252                 deltaScreenLayoutDir != (screenLayout & SCREENLAYOUT_LAYOUTDIR_MASK)) {
   1253             screenLayout = (screenLayout & ~SCREENLAYOUT_LAYOUTDIR_MASK) | deltaScreenLayoutDir;
   1254             changed |= ActivityInfo.CONFIG_LAYOUT_DIRECTION;
   1255         }
   1256         if (delta.userSetLocale && (!userSetLocale || ((changed & ActivityInfo.CONFIG_LOCALE) != 0)))
   1257         {
   1258             changed |= ActivityInfo.CONFIG_LOCALE;
   1259             userSetLocale = true;
   1260         }
   1261         if (delta.touchscreen != TOUCHSCREEN_UNDEFINED
   1262                 && touchscreen != delta.touchscreen) {
   1263             changed |= ActivityInfo.CONFIG_TOUCHSCREEN;
   1264             touchscreen = delta.touchscreen;
   1265         }
   1266         if (delta.keyboard != KEYBOARD_UNDEFINED
   1267                 && keyboard != delta.keyboard) {
   1268             changed |= ActivityInfo.CONFIG_KEYBOARD;
   1269             keyboard = delta.keyboard;
   1270         }
   1271         if (delta.keyboardHidden != KEYBOARDHIDDEN_UNDEFINED
   1272                 && keyboardHidden != delta.keyboardHidden) {
   1273             changed |= ActivityInfo.CONFIG_KEYBOARD_HIDDEN;
   1274             keyboardHidden = delta.keyboardHidden;
   1275         }
   1276         if (delta.hardKeyboardHidden != HARDKEYBOARDHIDDEN_UNDEFINED
   1277                 && hardKeyboardHidden != delta.hardKeyboardHidden) {
   1278             changed |= ActivityInfo.CONFIG_KEYBOARD_HIDDEN;
   1279             hardKeyboardHidden = delta.hardKeyboardHidden;
   1280         }
   1281         if (delta.navigation != NAVIGATION_UNDEFINED
   1282                 && navigation != delta.navigation) {
   1283             changed |= ActivityInfo.CONFIG_NAVIGATION;
   1284             navigation = delta.navigation;
   1285         }
   1286         if (delta.navigationHidden != NAVIGATIONHIDDEN_UNDEFINED
   1287                 && navigationHidden != delta.navigationHidden) {
   1288             changed |= ActivityInfo.CONFIG_KEYBOARD_HIDDEN;
   1289             navigationHidden = delta.navigationHidden;
   1290         }
   1291         if (delta.orientation != ORIENTATION_UNDEFINED
   1292                 && orientation != delta.orientation) {
   1293             changed |= ActivityInfo.CONFIG_ORIENTATION;
   1294             orientation = delta.orientation;
   1295         }
   1296         if (((delta.screenLayout & SCREENLAYOUT_SIZE_MASK) != SCREENLAYOUT_SIZE_UNDEFINED)
   1297                 && (delta.screenLayout & SCREENLAYOUT_SIZE_MASK)
   1298                 != (screenLayout & SCREENLAYOUT_SIZE_MASK)) {
   1299             changed |= ActivityInfo.CONFIG_SCREEN_LAYOUT;
   1300             screenLayout = (screenLayout & ~SCREENLAYOUT_SIZE_MASK)
   1301                     | (delta.screenLayout & SCREENLAYOUT_SIZE_MASK);
   1302         }
   1303         if (((delta.screenLayout & SCREENLAYOUT_LONG_MASK) != SCREENLAYOUT_LONG_UNDEFINED)
   1304                 && (delta.screenLayout & SCREENLAYOUT_LONG_MASK)
   1305                 != (screenLayout & SCREENLAYOUT_LONG_MASK)) {
   1306             changed |= ActivityInfo.CONFIG_SCREEN_LAYOUT;
   1307             screenLayout = (screenLayout & ~SCREENLAYOUT_LONG_MASK)
   1308                     | (delta.screenLayout & SCREENLAYOUT_LONG_MASK);
   1309         }
   1310         if (((delta.screenLayout & SCREENLAYOUT_ROUND_MASK) != SCREENLAYOUT_ROUND_UNDEFINED)
   1311                 && (delta.screenLayout & SCREENLAYOUT_ROUND_MASK)
   1312                 != (screenLayout & SCREENLAYOUT_ROUND_MASK)) {
   1313             changed |= ActivityInfo.CONFIG_SCREEN_LAYOUT;
   1314             screenLayout = (screenLayout & ~SCREENLAYOUT_ROUND_MASK)
   1315                     | (delta.screenLayout & SCREENLAYOUT_ROUND_MASK);
   1316         }
   1317         if ((delta.screenLayout & SCREENLAYOUT_COMPAT_NEEDED)
   1318                 != (screenLayout & SCREENLAYOUT_COMPAT_NEEDED)
   1319                 && delta.screenLayout != 0) {
   1320             changed |= ActivityInfo.CONFIG_SCREEN_LAYOUT;
   1321             screenLayout = (screenLayout & ~SCREENLAYOUT_COMPAT_NEEDED)
   1322                 | (delta.screenLayout & SCREENLAYOUT_COMPAT_NEEDED);
   1323         }
   1324 
   1325         if (((delta.colorMode & COLOR_MODE_WIDE_COLOR_GAMUT_MASK) !=
   1326                      COLOR_MODE_WIDE_COLOR_GAMUT_UNDEFINED)
   1327                 && (delta.colorMode & COLOR_MODE_WIDE_COLOR_GAMUT_MASK)
   1328                 != (colorMode & COLOR_MODE_WIDE_COLOR_GAMUT_MASK)) {
   1329             changed |= ActivityInfo.CONFIG_COLOR_MODE;
   1330             colorMode = (colorMode & ~COLOR_MODE_WIDE_COLOR_GAMUT_MASK)
   1331                     | (delta.colorMode & COLOR_MODE_WIDE_COLOR_GAMUT_MASK);
   1332         }
   1333 
   1334         if (((delta.colorMode & COLOR_MODE_HDR_MASK) != COLOR_MODE_HDR_UNDEFINED)
   1335                 && (delta.colorMode & COLOR_MODE_HDR_MASK)
   1336                 != (colorMode & COLOR_MODE_HDR_MASK)) {
   1337             changed |= ActivityInfo.CONFIG_COLOR_MODE;
   1338             colorMode = (colorMode & ~COLOR_MODE_HDR_MASK)
   1339                     | (delta.colorMode & COLOR_MODE_HDR_MASK);
   1340         }
   1341 
   1342         if (delta.uiMode != (UI_MODE_TYPE_UNDEFINED|UI_MODE_NIGHT_UNDEFINED)
   1343                 && uiMode != delta.uiMode) {
   1344             changed |= ActivityInfo.CONFIG_UI_MODE;
   1345             if ((delta.uiMode&UI_MODE_TYPE_MASK) != UI_MODE_TYPE_UNDEFINED) {
   1346                 uiMode = (uiMode&~UI_MODE_TYPE_MASK)
   1347                         | (delta.uiMode&UI_MODE_TYPE_MASK);
   1348             }
   1349             if ((delta.uiMode&UI_MODE_NIGHT_MASK) != UI_MODE_NIGHT_UNDEFINED) {
   1350                 uiMode = (uiMode&~UI_MODE_NIGHT_MASK)
   1351                         | (delta.uiMode&UI_MODE_NIGHT_MASK);
   1352             }
   1353         }
   1354         if (delta.screenWidthDp != SCREEN_WIDTH_DP_UNDEFINED
   1355                 && screenWidthDp != delta.screenWidthDp) {
   1356             changed |= ActivityInfo.CONFIG_SCREEN_SIZE;
   1357             screenWidthDp = delta.screenWidthDp;
   1358         }
   1359         if (delta.screenHeightDp != SCREEN_HEIGHT_DP_UNDEFINED
   1360                 && screenHeightDp != delta.screenHeightDp) {
   1361             changed |= ActivityInfo.CONFIG_SCREEN_SIZE;
   1362             screenHeightDp = delta.screenHeightDp;
   1363         }
   1364         if (delta.smallestScreenWidthDp != SMALLEST_SCREEN_WIDTH_DP_UNDEFINED
   1365                 && smallestScreenWidthDp != delta.smallestScreenWidthDp) {
   1366             changed |= ActivityInfo.CONFIG_SMALLEST_SCREEN_SIZE;
   1367             smallestScreenWidthDp = delta.smallestScreenWidthDp;
   1368         }
   1369         if (delta.densityDpi != DENSITY_DPI_UNDEFINED &&
   1370                 densityDpi != delta.densityDpi) {
   1371             changed |= ActivityInfo.CONFIG_DENSITY;
   1372             densityDpi = delta.densityDpi;
   1373         }
   1374         if (delta.compatScreenWidthDp != SCREEN_WIDTH_DP_UNDEFINED) {
   1375             compatScreenWidthDp = delta.compatScreenWidthDp;
   1376         }
   1377         if (delta.compatScreenHeightDp != SCREEN_HEIGHT_DP_UNDEFINED) {
   1378             compatScreenHeightDp = delta.compatScreenHeightDp;
   1379         }
   1380         if (delta.compatSmallestScreenWidthDp != SMALLEST_SCREEN_WIDTH_DP_UNDEFINED) {
   1381             compatSmallestScreenWidthDp = delta.compatSmallestScreenWidthDp;
   1382         }
   1383         if (delta.assetsSeq != ASSETS_SEQ_UNDEFINED && delta.assetsSeq != assetsSeq) {
   1384             changed |= ActivityInfo.CONFIG_ASSETS_PATHS;
   1385             assetsSeq = delta.assetsSeq;
   1386         }
   1387         if (delta.seq != 0) {
   1388             seq = delta.seq;
   1389         }
   1390         if (windowConfiguration.updateFrom(delta.windowConfiguration) != 0) {
   1391             changed |= ActivityInfo.CONFIG_WINDOW_CONFIGURATION;
   1392         }
   1393 
   1394         return changed;
   1395     }
   1396 
   1397     /**
   1398      * Return a bit mask of the differences between this Configuration
   1399      * object and the given one.  Does not change the values of either.  Any
   1400      * undefined fields in <var>delta</var> are ignored.
   1401      * @return Returns a bit mask indicating which configuration
   1402      * values has changed, containing any combination of
   1403      * {@link android.content.pm.ActivityInfo#CONFIG_FONT_SCALE
   1404      * PackageManager.ActivityInfo.CONFIG_FONT_SCALE},
   1405      * {@link android.content.pm.ActivityInfo#CONFIG_MCC
   1406      * PackageManager.ActivityInfo.CONFIG_MCC},
   1407      * {@link android.content.pm.ActivityInfo#CONFIG_MNC
   1408      * PackageManager.ActivityInfo.CONFIG_MNC},
   1409      * {@link android.content.pm.ActivityInfo#CONFIG_LOCALE
   1410      * PackageManager.ActivityInfo.CONFIG_LOCALE},
   1411      * {@link android.content.pm.ActivityInfo#CONFIG_TOUCHSCREEN
   1412      * PackageManager.ActivityInfo.CONFIG_TOUCHSCREEN},
   1413      * {@link android.content.pm.ActivityInfo#CONFIG_KEYBOARD
   1414      * PackageManager.ActivityInfo.CONFIG_KEYBOARD},
   1415      * {@link android.content.pm.ActivityInfo#CONFIG_NAVIGATION
   1416      * PackageManager.ActivityInfo.CONFIG_NAVIGATION},
   1417      * {@link android.content.pm.ActivityInfo#CONFIG_ORIENTATION
   1418      * PackageManager.ActivityInfo.CONFIG_ORIENTATION},
   1419      * {@link android.content.pm.ActivityInfo#CONFIG_SCREEN_LAYOUT
   1420      * PackageManager.ActivityInfo.CONFIG_SCREEN_LAYOUT}, or
   1421      * {@link android.content.pm.ActivityInfo#CONFIG_SCREEN_SIZE
   1422      * PackageManager.ActivityInfo.CONFIG_SCREEN_SIZE}, or
   1423      * {@link android.content.pm.ActivityInfo#CONFIG_SMALLEST_SCREEN_SIZE
   1424      * PackageManager.ActivityInfo.CONFIG_SMALLEST_SCREEN_SIZE}.
   1425      * {@link android.content.pm.ActivityInfo#CONFIG_LAYOUT_DIRECTION
   1426      * PackageManager.ActivityInfo.CONFIG_LAYOUT_DIRECTION}.
   1427      */
   1428     public int diff(Configuration delta) {
   1429         return diff(delta, false /* compareUndefined */, false /* publicOnly */);
   1430     }
   1431 
   1432     /**
   1433      * Returns the diff against the provided {@link Configuration} excluding values that would
   1434      * publicly be equivalent, such as appBounds.
   1435      * @param delta {@link Configuration} to compare to.
   1436      *
   1437      * TODO(b/36812336): Remove once appBounds has been moved out of Configuration.
   1438      * {@hide}
   1439      */
   1440     public int diffPublicOnly(Configuration delta) {
   1441         return diff(delta, false /* compareUndefined */, true /* publicOnly */);
   1442     }
   1443 
   1444     /**
   1445      * Variation of {@link #diff(Configuration)} with an option to skip checks for undefined values.
   1446      *
   1447      * @hide
   1448      */
   1449     public int diff(Configuration delta, boolean compareUndefined, boolean publicOnly) {
   1450         int changed = 0;
   1451         if ((compareUndefined || delta.fontScale > 0) && fontScale != delta.fontScale) {
   1452             changed |= ActivityInfo.CONFIG_FONT_SCALE;
   1453         }
   1454         if ((compareUndefined || delta.mcc != 0) && mcc != delta.mcc) {
   1455             changed |= ActivityInfo.CONFIG_MCC;
   1456         }
   1457         if ((compareUndefined || delta.mnc != 0) && mnc != delta.mnc) {
   1458             changed |= ActivityInfo.CONFIG_MNC;
   1459         }
   1460         fixUpLocaleList();
   1461         delta.fixUpLocaleList();
   1462         if ((compareUndefined || !delta.mLocaleList.isEmpty())
   1463                 && !mLocaleList.equals(delta.mLocaleList)) {
   1464             changed |= ActivityInfo.CONFIG_LOCALE;
   1465             changed |= ActivityInfo.CONFIG_LAYOUT_DIRECTION;
   1466         }
   1467         final int deltaScreenLayoutDir = delta.screenLayout & SCREENLAYOUT_LAYOUTDIR_MASK;
   1468         if ((compareUndefined || deltaScreenLayoutDir != SCREENLAYOUT_LAYOUTDIR_UNDEFINED)
   1469                 && deltaScreenLayoutDir != (screenLayout & SCREENLAYOUT_LAYOUTDIR_MASK)) {
   1470             changed |= ActivityInfo.CONFIG_LAYOUT_DIRECTION;
   1471         }
   1472         if ((compareUndefined || delta.touchscreen != TOUCHSCREEN_UNDEFINED)
   1473                 && touchscreen != delta.touchscreen) {
   1474             changed |= ActivityInfo.CONFIG_TOUCHSCREEN;
   1475         }
   1476         if ((compareUndefined || delta.keyboard != KEYBOARD_UNDEFINED)
   1477                 && keyboard != delta.keyboard) {
   1478             changed |= ActivityInfo.CONFIG_KEYBOARD;
   1479         }
   1480         if ((compareUndefined || delta.keyboardHidden != KEYBOARDHIDDEN_UNDEFINED)
   1481                 && keyboardHidden != delta.keyboardHidden) {
   1482             changed |= ActivityInfo.CONFIG_KEYBOARD_HIDDEN;
   1483         }
   1484         if ((compareUndefined || delta.hardKeyboardHidden != HARDKEYBOARDHIDDEN_UNDEFINED)
   1485                 && hardKeyboardHidden != delta.hardKeyboardHidden) {
   1486             changed |= ActivityInfo.CONFIG_KEYBOARD_HIDDEN;
   1487         }
   1488         if ((compareUndefined || delta.navigation != NAVIGATION_UNDEFINED)
   1489                 && navigation != delta.navigation) {
   1490             changed |= ActivityInfo.CONFIG_NAVIGATION;
   1491         }
   1492         if ((compareUndefined || delta.navigationHidden != NAVIGATIONHIDDEN_UNDEFINED)
   1493                 && navigationHidden != delta.navigationHidden) {
   1494             changed |= ActivityInfo.CONFIG_KEYBOARD_HIDDEN;
   1495         }
   1496         if ((compareUndefined || delta.orientation != ORIENTATION_UNDEFINED)
   1497                 && orientation != delta.orientation) {
   1498             changed |= ActivityInfo.CONFIG_ORIENTATION;
   1499         }
   1500         if ((compareUndefined || getScreenLayoutNoDirection(delta.screenLayout) !=
   1501                 (SCREENLAYOUT_SIZE_UNDEFINED | SCREENLAYOUT_LONG_UNDEFINED))
   1502                 && getScreenLayoutNoDirection(screenLayout) !=
   1503                 getScreenLayoutNoDirection(delta.screenLayout)) {
   1504             changed |= ActivityInfo.CONFIG_SCREEN_LAYOUT;
   1505         }
   1506         if ((compareUndefined ||
   1507                      (delta.colorMode & COLOR_MODE_HDR_MASK) != COLOR_MODE_HDR_UNDEFINED)
   1508                 && (colorMode & COLOR_MODE_HDR_MASK) !=
   1509                         (delta.colorMode & COLOR_MODE_HDR_MASK)) {
   1510             changed |= ActivityInfo.CONFIG_COLOR_MODE;
   1511         }
   1512         if ((compareUndefined ||
   1513                      (delta.colorMode & COLOR_MODE_WIDE_COLOR_GAMUT_MASK) !=
   1514                              COLOR_MODE_WIDE_COLOR_GAMUT_UNDEFINED)
   1515                 && (colorMode & COLOR_MODE_WIDE_COLOR_GAMUT_MASK) !=
   1516                         (delta.colorMode & COLOR_MODE_WIDE_COLOR_GAMUT_MASK)) {
   1517             changed |= ActivityInfo.CONFIG_COLOR_MODE;
   1518         }
   1519         if ((compareUndefined || delta.uiMode != (UI_MODE_TYPE_UNDEFINED|UI_MODE_NIGHT_UNDEFINED))
   1520                 && uiMode != delta.uiMode) {
   1521             changed |= ActivityInfo.CONFIG_UI_MODE;
   1522         }
   1523         if ((compareUndefined || delta.screenWidthDp != SCREEN_WIDTH_DP_UNDEFINED)
   1524                 && screenWidthDp != delta.screenWidthDp) {
   1525             changed |= ActivityInfo.CONFIG_SCREEN_SIZE;
   1526         }
   1527         if ((compareUndefined || delta.screenHeightDp != SCREEN_HEIGHT_DP_UNDEFINED)
   1528                 && screenHeightDp != delta.screenHeightDp) {
   1529             changed |= ActivityInfo.CONFIG_SCREEN_SIZE;
   1530         }
   1531         if ((compareUndefined || delta.smallestScreenWidthDp != SMALLEST_SCREEN_WIDTH_DP_UNDEFINED)
   1532                 && smallestScreenWidthDp != delta.smallestScreenWidthDp) {
   1533             changed |= ActivityInfo.CONFIG_SMALLEST_SCREEN_SIZE;
   1534         }
   1535         if ((compareUndefined || delta.densityDpi != DENSITY_DPI_UNDEFINED)
   1536                 && densityDpi != delta.densityDpi) {
   1537             changed |= ActivityInfo.CONFIG_DENSITY;
   1538         }
   1539         if ((compareUndefined || delta.assetsSeq != ASSETS_SEQ_UNDEFINED)
   1540                 && assetsSeq != delta.assetsSeq) {
   1541             changed |= ActivityInfo.CONFIG_ASSETS_PATHS;
   1542         }
   1543 
   1544         // WindowConfiguration differences aren't considered public...
   1545         if (!publicOnly
   1546                 && windowConfiguration.diff(delta.windowConfiguration, compareUndefined) != 0) {
   1547             changed |= ActivityInfo.CONFIG_WINDOW_CONFIGURATION;
   1548         }
   1549 
   1550         return changed;
   1551     }
   1552 
   1553     /**
   1554      * Determines if a new resource needs to be loaded from the bit set of
   1555      * configuration changes returned by {@link #updateFrom(Configuration)}.
   1556      *
   1557      * @param configChanges the mask of changes configurations as returned by
   1558      *                      {@link #updateFrom(Configuration)}
   1559      * @param interestingChanges the configuration changes that the resource
   1560      *                           can handle as given in
   1561      *                           {@link android.util.TypedValue#changingConfigurations}
   1562      * @return {@code true} if the resource needs to be loaded, {@code false}
   1563      *         otherwise
   1564      */
   1565     public static boolean needNewResources(@Config int configChanges,
   1566             @Config int interestingChanges) {
   1567         // CONFIG_ASSETS_PATHS and CONFIG_FONT_SCALE are higher level configuration changes that
   1568         // all resources are subject to change with.
   1569         interestingChanges = interestingChanges | ActivityInfo.CONFIG_ASSETS_PATHS
   1570                 | ActivityInfo.CONFIG_FONT_SCALE;
   1571         return (configChanges & interestingChanges) != 0;
   1572     }
   1573 
   1574     /**
   1575      * @hide Return true if the sequence of 'other' is better than this.  Assumes
   1576      * that 'this' is your current sequence and 'other' is a new one you have
   1577      * received some how and want to compare with what you have.
   1578      */
   1579     public boolean isOtherSeqNewer(Configuration other) {
   1580         if (other == null) {
   1581             // Sanity check.
   1582             return false;
   1583         }
   1584         if (other.seq == 0) {
   1585             // If the other sequence is not specified, then we must assume
   1586             // it is newer since we don't know any better.
   1587             return true;
   1588         }
   1589         if (seq == 0) {
   1590             // If this sequence is not specified, then we also consider the
   1591             // other is better.  Yes we have a preference for other.  Sue us.
   1592             return true;
   1593         }
   1594         int diff = other.seq - seq;
   1595         if (diff > 0x10000) {
   1596             // If there has been a sufficiently large jump, assume the
   1597             // sequence has wrapped around.
   1598             return false;
   1599         }
   1600         return diff > 0;
   1601     }
   1602 
   1603     /**
   1604      * Parcelable methods
   1605      */
   1606     public int describeContents() {
   1607         return 0;
   1608     }
   1609 
   1610     public void writeToParcel(Parcel dest, int flags) {
   1611         dest.writeFloat(fontScale);
   1612         dest.writeInt(mcc);
   1613         dest.writeInt(mnc);
   1614 
   1615         fixUpLocaleList();
   1616         dest.writeParcelable(mLocaleList, flags);
   1617 
   1618         if(userSetLocale) {
   1619             dest.writeInt(1);
   1620         } else {
   1621             dest.writeInt(0);
   1622         }
   1623         dest.writeInt(touchscreen);
   1624         dest.writeInt(keyboard);
   1625         dest.writeInt(keyboardHidden);
   1626         dest.writeInt(hardKeyboardHidden);
   1627         dest.writeInt(navigation);
   1628         dest.writeInt(navigationHidden);
   1629         dest.writeInt(orientation);
   1630         dest.writeInt(screenLayout);
   1631         dest.writeInt(colorMode);
   1632         dest.writeInt(uiMode);
   1633         dest.writeInt(screenWidthDp);
   1634         dest.writeInt(screenHeightDp);
   1635         dest.writeInt(smallestScreenWidthDp);
   1636         dest.writeInt(densityDpi);
   1637         dest.writeInt(compatScreenWidthDp);
   1638         dest.writeInt(compatScreenHeightDp);
   1639         dest.writeInt(compatSmallestScreenWidthDp);
   1640         dest.writeValue(windowConfiguration);
   1641         dest.writeInt(assetsSeq);
   1642         dest.writeInt(seq);
   1643     }
   1644 
   1645     public void readFromParcel(Parcel source) {
   1646         fontScale = source.readFloat();
   1647         mcc = source.readInt();
   1648         mnc = source.readInt();
   1649 
   1650         mLocaleList = source.readParcelable(LocaleList.class.getClassLoader());
   1651         locale = mLocaleList.get(0);
   1652 
   1653         userSetLocale = (source.readInt()==1);
   1654         touchscreen = source.readInt();
   1655         keyboard = source.readInt();
   1656         keyboardHidden = source.readInt();
   1657         hardKeyboardHidden = source.readInt();
   1658         navigation = source.readInt();
   1659         navigationHidden = source.readInt();
   1660         orientation = source.readInt();
   1661         screenLayout = source.readInt();
   1662         colorMode = source.readInt();
   1663         uiMode = source.readInt();
   1664         screenWidthDp = source.readInt();
   1665         screenHeightDp = source.readInt();
   1666         smallestScreenWidthDp = source.readInt();
   1667         densityDpi = source.readInt();
   1668         compatScreenWidthDp = source.readInt();
   1669         compatScreenHeightDp = source.readInt();
   1670         compatSmallestScreenWidthDp = source.readInt();
   1671         windowConfiguration.setTo((WindowConfiguration) source.readValue(null));
   1672         assetsSeq = source.readInt();
   1673         seq = source.readInt();
   1674     }
   1675 
   1676     public static final Parcelable.Creator<Configuration> CREATOR
   1677             = new Parcelable.Creator<Configuration>() {
   1678         public Configuration createFromParcel(Parcel source) {
   1679             return new Configuration(source);
   1680         }
   1681 
   1682         public Configuration[] newArray(int size) {
   1683             return new Configuration[size];
   1684         }
   1685     };
   1686 
   1687     /**
   1688      * Construct this Configuration object, reading from the Parcel.
   1689      */
   1690     private Configuration(Parcel source) {
   1691         readFromParcel(source);
   1692     }
   1693 
   1694     public int compareTo(Configuration that) {
   1695         int n;
   1696         float a = this.fontScale;
   1697         float b = that.fontScale;
   1698         if (a < b) return -1;
   1699         if (a > b) return 1;
   1700         n = this.mcc - that.mcc;
   1701         if (n != 0) return n;
   1702         n = this.mnc - that.mnc;
   1703         if (n != 0) return n;
   1704 
   1705         fixUpLocaleList();
   1706         that.fixUpLocaleList();
   1707         // for backward compatibility, we consider an empty locale list to be greater
   1708         // than any non-empty locale list.
   1709         if (this.mLocaleList.isEmpty()) {
   1710             if (!that.mLocaleList.isEmpty()) return 1;
   1711         } else if (that.mLocaleList.isEmpty()) {
   1712             return -1;
   1713         } else {
   1714             final int minSize = Math.min(this.mLocaleList.size(), that.mLocaleList.size());
   1715             for (int i = 0; i < minSize; ++i) {
   1716                 final Locale thisLocale = this.mLocaleList.get(i);
   1717                 final Locale thatLocale = that.mLocaleList.get(i);
   1718                 n = thisLocale.getLanguage().compareTo(thatLocale.getLanguage());
   1719                 if (n != 0) return n;
   1720                 n = thisLocale.getCountry().compareTo(thatLocale.getCountry());
   1721                 if (n != 0) return n;
   1722                 n = thisLocale.getVariant().compareTo(thatLocale.getVariant());
   1723                 if (n != 0) return n;
   1724                 n = thisLocale.toLanguageTag().compareTo(thatLocale.toLanguageTag());
   1725                 if (n != 0) return n;
   1726             }
   1727             n = this.mLocaleList.size() - that.mLocaleList.size();
   1728             if (n != 0) return n;
   1729         }
   1730 
   1731         n = this.touchscreen - that.touchscreen;
   1732         if (n != 0) return n;
   1733         n = this.keyboard - that.keyboard;
   1734         if (n != 0) return n;
   1735         n = this.keyboardHidden - that.keyboardHidden;
   1736         if (n != 0) return n;
   1737         n = this.hardKeyboardHidden - that.hardKeyboardHidden;
   1738         if (n != 0) return n;
   1739         n = this.navigation - that.navigation;
   1740         if (n != 0) return n;
   1741         n = this.navigationHidden - that.navigationHidden;
   1742         if (n != 0) return n;
   1743         n = this.orientation - that.orientation;
   1744         if (n != 0) return n;
   1745         n = this.colorMode - that.colorMode;
   1746         if (n != 0) return n;
   1747         n = this.screenLayout - that.screenLayout;
   1748         if (n != 0) return n;
   1749         n = this.uiMode - that.uiMode;
   1750         if (n != 0) return n;
   1751         n = this.screenWidthDp - that.screenWidthDp;
   1752         if (n != 0) return n;
   1753         n = this.screenHeightDp - that.screenHeightDp;
   1754         if (n != 0) return n;
   1755         n = this.smallestScreenWidthDp - that.smallestScreenWidthDp;
   1756         if (n != 0) return n;
   1757         n = this.densityDpi - that.densityDpi;
   1758         if (n != 0) return n;
   1759         n = this.assetsSeq - that.assetsSeq;
   1760         if (n != 0) return n;
   1761         n = windowConfiguration.compareTo(that.windowConfiguration);
   1762         if (n != 0) return n;
   1763 
   1764         // if (n != 0) return n;
   1765         return n;
   1766     }
   1767 
   1768     public boolean equals(Configuration that) {
   1769         if (that == null) return false;
   1770         if (that == this) return true;
   1771         return this.compareTo(that) == 0;
   1772     }
   1773 
   1774     public boolean equals(Object that) {
   1775         try {
   1776             return equals((Configuration)that);
   1777         } catch (ClassCastException e) {
   1778         }
   1779         return false;
   1780     }
   1781 
   1782     public int hashCode() {
   1783         int result = 17;
   1784         result = 31 * result + Float.floatToIntBits(fontScale);
   1785         result = 31 * result + mcc;
   1786         result = 31 * result + mnc;
   1787         result = 31 * result + mLocaleList.hashCode();
   1788         result = 31 * result + touchscreen;
   1789         result = 31 * result + keyboard;
   1790         result = 31 * result + keyboardHidden;
   1791         result = 31 * result + hardKeyboardHidden;
   1792         result = 31 * result + navigation;
   1793         result = 31 * result + navigationHidden;
   1794         result = 31 * result + orientation;
   1795         result = 31 * result + screenLayout;
   1796         result = 31 * result + colorMode;
   1797         result = 31 * result + uiMode;
   1798         result = 31 * result + screenWidthDp;
   1799         result = 31 * result + screenHeightDp;
   1800         result = 31 * result + smallestScreenWidthDp;
   1801         result = 31 * result + densityDpi;
   1802         result = 31 * result + assetsSeq;
   1803         return result;
   1804     }
   1805 
   1806     /**
   1807      * Get the locale list. This is the preferred way for getting the locales (instead of using
   1808      * the direct accessor to {@link #locale}, which would only provide the primary locale).
   1809      *
   1810      * @return The locale list.
   1811      */
   1812     public @NonNull LocaleList getLocales() {
   1813         fixUpLocaleList();
   1814         return mLocaleList;
   1815     }
   1816 
   1817     /**
   1818      * Set the locale list. This is the preferred way for setting up the locales (instead of using
   1819      * the direct accessor or {@link #setLocale(Locale)}). This will also set the layout direction
   1820      * according to the first locale in the list.
   1821      *
   1822      * Note that the layout direction will always come from the first locale in the locale list,
   1823      * even if the locale is not supported by the resources (the resources may only support
   1824      * another locale further down the list which has a different direction).
   1825      *
   1826      * @param locales The locale list. If null, an empty LocaleList will be assigned.
   1827      */
   1828     public void setLocales(@Nullable LocaleList locales) {
   1829         mLocaleList = locales == null ? LocaleList.getEmptyLocaleList() : locales;
   1830         locale = mLocaleList.get(0);
   1831         setLayoutDirection(locale);
   1832     }
   1833 
   1834     /**
   1835      * Set the locale list to a list of just one locale. This will also set the layout direction
   1836      * according to the locale.
   1837      *
   1838      * Note that after this is run, calling <code>.equals()</code> on the input locale and the
   1839      * {@link #locale} attribute would return <code>true</code> if they are not null, but there is
   1840      * no guarantee that they would be the same object.
   1841      *
   1842      * See also the note about layout direction in {@link #setLocales(LocaleList)}.
   1843      *
   1844      * @param loc The locale. Can be null.
   1845      */
   1846     public void setLocale(@Nullable Locale loc) {
   1847         setLocales(loc == null ? LocaleList.getEmptyLocaleList() : new LocaleList(loc));
   1848     }
   1849 
   1850     /**
   1851      * @hide
   1852      *
   1853      * Clears the locale without changing layout direction.
   1854      */
   1855     public void clearLocales() {
   1856         mLocaleList = LocaleList.getEmptyLocaleList();
   1857         locale = null;
   1858     }
   1859 
   1860     /**
   1861      * Return the layout direction. Will be either {@link View#LAYOUT_DIRECTION_LTR} or
   1862      * {@link View#LAYOUT_DIRECTION_RTL}.
   1863      *
   1864      * @return Returns {@link View#LAYOUT_DIRECTION_RTL} if the configuration
   1865      * is {@link #SCREENLAYOUT_LAYOUTDIR_RTL}, otherwise {@link View#LAYOUT_DIRECTION_LTR}.
   1866      */
   1867     public int getLayoutDirection() {
   1868         return (screenLayout&SCREENLAYOUT_LAYOUTDIR_MASK) == SCREENLAYOUT_LAYOUTDIR_RTL
   1869                 ? View.LAYOUT_DIRECTION_RTL : View.LAYOUT_DIRECTION_LTR;
   1870     }
   1871 
   1872     /**
   1873      * Set the layout direction from a Locale.
   1874      *
   1875      * @param loc The Locale. If null will set the layout direction to
   1876      * {@link View#LAYOUT_DIRECTION_LTR}. If not null will set it to the layout direction
   1877      * corresponding to the Locale.
   1878      *
   1879      * @see View#LAYOUT_DIRECTION_LTR
   1880      * @see View#LAYOUT_DIRECTION_RTL
   1881      */
   1882     public void setLayoutDirection(Locale loc) {
   1883         // There is a "1" difference between the configuration values for
   1884         // layout direction and View constants for layout direction, just add "1".
   1885         final int layoutDirection = 1 + TextUtils.getLayoutDirectionFromLocale(loc);
   1886         screenLayout = (screenLayout&~SCREENLAYOUT_LAYOUTDIR_MASK)|
   1887                 (layoutDirection << SCREENLAYOUT_LAYOUTDIR_SHIFT);
   1888     }
   1889 
   1890     private static int getScreenLayoutNoDirection(int screenLayout) {
   1891         return screenLayout&~SCREENLAYOUT_LAYOUTDIR_MASK;
   1892     }
   1893 
   1894     /**
   1895      * Return whether the screen has a round shape. Apps may choose to change styling based
   1896      * on this property, such as the alignment or layout of text or informational icons.
   1897      *
   1898      * @return true if the screen is rounded, false otherwise
   1899      */
   1900     public boolean isScreenRound() {
   1901         return (screenLayout & SCREENLAYOUT_ROUND_MASK) == SCREENLAYOUT_ROUND_YES;
   1902     }
   1903 
   1904     /**
   1905      * Return whether the screen has a wide color gamut and wide color gamut rendering
   1906      * is supported by this device.
   1907      *
   1908      * When true, it implies the screen is colorspace aware but not
   1909      * necessarily color-managed. The final colors may still be changed by the
   1910      * screen depending on user settings.
   1911      *
   1912      * @return true if the screen has a wide color gamut and wide color gamut rendering
   1913      * is supported, false otherwise
   1914      */
   1915     public boolean isScreenWideColorGamut() {
   1916         return (colorMode & COLOR_MODE_WIDE_COLOR_GAMUT_MASK) == COLOR_MODE_WIDE_COLOR_GAMUT_YES;
   1917     }
   1918 
   1919     /**
   1920      * Return whether the screen has a high dynamic range.
   1921      *
   1922      * @return true if the screen has a high dynamic range, false otherwise
   1923      */
   1924     public boolean isScreenHdr() {
   1925         return (colorMode & COLOR_MODE_HDR_MASK) == COLOR_MODE_HDR_YES;
   1926     }
   1927 
   1928     /**
   1929      *
   1930      * @hide
   1931      */
   1932     public static String localesToResourceQualifier(LocaleList locs) {
   1933         final StringBuilder sb = new StringBuilder();
   1934         for (int i = 0; i < locs.size(); i++) {
   1935             final Locale loc = locs.get(i);
   1936             final int l = loc.getLanguage().length();
   1937             if (l == 0) {
   1938                 continue;
   1939             }
   1940             final int s = loc.getScript().length();
   1941             final int c = loc.getCountry().length();
   1942             final int v = loc.getVariant().length();
   1943             // We ignore locale extensions, since they are not supported by AAPT
   1944 
   1945             if (sb.length() != 0) {
   1946                 sb.append(",");
   1947             }
   1948             if (l == 2 && s == 0 && (c == 0 || c == 2) && v == 0) {
   1949                 // Traditional locale format: xx or xx-rYY
   1950                 sb.append(loc.getLanguage());
   1951                 if (c == 2) {
   1952                     sb.append("-r").append(loc.getCountry());
   1953                 }
   1954             } else {
   1955                 sb.append("b+");
   1956                 sb.append(loc.getLanguage());
   1957                 if (s != 0) {
   1958                     sb.append("+");
   1959                     sb.append(loc.getScript());
   1960                 }
   1961                 if (c != 0) {
   1962                     sb.append("+");
   1963                     sb.append(loc.getCountry());
   1964                 }
   1965                 if (v != 0) {
   1966                     sb.append("+");
   1967                     sb.append(loc.getVariant());
   1968                 }
   1969             }
   1970         }
   1971         return sb.toString();
   1972     }
   1973 
   1974 
   1975     /**
   1976      * Returns a string representation of the configuration that can be parsed
   1977      * by build tools (like AAPT), without display metrics included
   1978      *
   1979      * @hide
   1980      */
   1981     public static String resourceQualifierString(Configuration config) {
   1982         return resourceQualifierString(config, null);
   1983     }
   1984 
   1985     /**
   1986      * Returns a string representation of the configuration that can be parsed
   1987      * by build tools (like AAPT).
   1988      *
   1989      * @hide
   1990      */
   1991     public static String resourceQualifierString(Configuration config, DisplayMetrics metrics) {
   1992         ArrayList<String> parts = new ArrayList<String>();
   1993 
   1994         if (config.mcc != 0) {
   1995             parts.add("mcc" + config.mcc);
   1996             if (config.mnc != 0) {
   1997                 parts.add("mnc" + config.mnc);
   1998             }
   1999         }
   2000 
   2001         if (!config.mLocaleList.isEmpty()) {
   2002             final String resourceQualifier = localesToResourceQualifier(config.mLocaleList);
   2003             if (!resourceQualifier.isEmpty()) {
   2004                 parts.add(resourceQualifier);
   2005             }
   2006         }
   2007 
   2008         switch (config.screenLayout & Configuration.SCREENLAYOUT_LAYOUTDIR_MASK) {
   2009             case Configuration.SCREENLAYOUT_LAYOUTDIR_LTR:
   2010                 parts.add("ldltr");
   2011                 break;
   2012             case Configuration.SCREENLAYOUT_LAYOUTDIR_RTL:
   2013                 parts.add("ldrtl");
   2014                 break;
   2015             default:
   2016                 break;
   2017         }
   2018 
   2019         if (config.smallestScreenWidthDp != 0) {
   2020             parts.add("sw" + config.smallestScreenWidthDp + "dp");
   2021         }
   2022 
   2023         if (config.screenWidthDp != 0) {
   2024             parts.add("w" + config.screenWidthDp + "dp");
   2025         }
   2026 
   2027         if (config.screenHeightDp != 0) {
   2028             parts.add("h" + config.screenHeightDp + "dp");
   2029         }
   2030 
   2031         switch (config.screenLayout & Configuration.SCREENLAYOUT_SIZE_MASK) {
   2032             case Configuration.SCREENLAYOUT_SIZE_SMALL:
   2033                 parts.add("small");
   2034                 break;
   2035             case Configuration.SCREENLAYOUT_SIZE_NORMAL:
   2036                 parts.add("normal");
   2037                 break;
   2038             case Configuration.SCREENLAYOUT_SIZE_LARGE:
   2039                 parts.add("large");
   2040                 break;
   2041             case Configuration.SCREENLAYOUT_SIZE_XLARGE:
   2042                 parts.add("xlarge");
   2043                 break;
   2044             default:
   2045                 break;
   2046         }
   2047 
   2048         switch (config.screenLayout & Configuration.SCREENLAYOUT_LONG_MASK) {
   2049             case Configuration.SCREENLAYOUT_LONG_YES:
   2050                 parts.add("long");
   2051                 break;
   2052             case Configuration.SCREENLAYOUT_LONG_NO:
   2053                 parts.add("notlong");
   2054                 break;
   2055             default:
   2056                 break;
   2057         }
   2058 
   2059         switch (config.screenLayout & Configuration.SCREENLAYOUT_ROUND_MASK) {
   2060             case Configuration.SCREENLAYOUT_ROUND_YES:
   2061                 parts.add("round");
   2062                 break;
   2063             case Configuration.SCREENLAYOUT_ROUND_NO:
   2064                 parts.add("notround");
   2065                 break;
   2066             default:
   2067                 break;
   2068         }
   2069 
   2070         switch (config.colorMode & Configuration.COLOR_MODE_HDR_MASK) {
   2071             case Configuration.COLOR_MODE_HDR_YES:
   2072                 parts.add("highdr");
   2073                 break;
   2074             case Configuration.COLOR_MODE_HDR_NO:
   2075                 parts.add("lowdr");
   2076                 break;
   2077             default:
   2078                 break;
   2079         }
   2080 
   2081         switch (config.colorMode & Configuration.COLOR_MODE_WIDE_COLOR_GAMUT_MASK) {
   2082             case Configuration.COLOR_MODE_WIDE_COLOR_GAMUT_YES:
   2083                 parts.add("widecg");
   2084                 break;
   2085             case Configuration.COLOR_MODE_WIDE_COLOR_GAMUT_NO:
   2086                 parts.add("nowidecg");
   2087                 break;
   2088             default:
   2089                 break;
   2090         }
   2091 
   2092         switch (config.orientation) {
   2093             case Configuration.ORIENTATION_LANDSCAPE:
   2094                 parts.add("land");
   2095                 break;
   2096             case Configuration.ORIENTATION_PORTRAIT:
   2097                 parts.add("port");
   2098                 break;
   2099             default:
   2100                 break;
   2101         }
   2102 
   2103         switch (config.uiMode & Configuration.UI_MODE_TYPE_MASK) {
   2104             case Configuration.UI_MODE_TYPE_APPLIANCE:
   2105                 parts.add("appliance");
   2106                 break;
   2107             case Configuration.UI_MODE_TYPE_DESK:
   2108                 parts.add("desk");
   2109                 break;
   2110             case Configuration.UI_MODE_TYPE_TELEVISION:
   2111                 parts.add("television");
   2112                 break;
   2113             case Configuration.UI_MODE_TYPE_CAR:
   2114                 parts.add("car");
   2115                 break;
   2116             case Configuration.UI_MODE_TYPE_WATCH:
   2117                 parts.add("watch");
   2118                 break;
   2119             case Configuration.UI_MODE_TYPE_VR_HEADSET:
   2120                 parts.add("vrheadset");
   2121                 break;
   2122             default:
   2123                 break;
   2124         }
   2125 
   2126         switch (config.uiMode & Configuration.UI_MODE_NIGHT_MASK) {
   2127             case Configuration.UI_MODE_NIGHT_YES:
   2128                 parts.add("night");
   2129                 break;
   2130             case Configuration.UI_MODE_NIGHT_NO:
   2131                 parts.add("notnight");
   2132                 break;
   2133             default:
   2134                 break;
   2135         }
   2136 
   2137         switch (config.densityDpi) {
   2138             case DENSITY_DPI_UNDEFINED:
   2139                 break;
   2140             case 120:
   2141                 parts.add("ldpi");
   2142                 break;
   2143             case 160:
   2144                 parts.add("mdpi");
   2145                 break;
   2146             case 213:
   2147                 parts.add("tvdpi");
   2148                 break;
   2149             case 240:
   2150                 parts.add("hdpi");
   2151                 break;
   2152             case 320:
   2153                 parts.add("xhdpi");
   2154                 break;
   2155             case 480:
   2156                 parts.add("xxhdpi");
   2157                 break;
   2158             case 640:
   2159                 parts.add("xxxhdpi");
   2160                 break;
   2161             case DENSITY_DPI_ANY:
   2162                 parts.add("anydpi");
   2163                 break;
   2164             case DENSITY_DPI_NONE:
   2165                 parts.add("nodpi");
   2166                 break;
   2167             default:
   2168                 parts.add(config.densityDpi + "dpi");
   2169                 break;
   2170         }
   2171 
   2172         switch (config.touchscreen) {
   2173             case Configuration.TOUCHSCREEN_NOTOUCH:
   2174                 parts.add("notouch");
   2175                 break;
   2176             case Configuration.TOUCHSCREEN_FINGER:
   2177                 parts.add("finger");
   2178                 break;
   2179             default:
   2180                 break;
   2181         }
   2182 
   2183         switch (config.keyboardHidden) {
   2184             case Configuration.KEYBOARDHIDDEN_NO:
   2185                 parts.add("keysexposed");
   2186                 break;
   2187             case Configuration.KEYBOARDHIDDEN_YES:
   2188                 parts.add("keyshidden");
   2189                 break;
   2190             case Configuration.KEYBOARDHIDDEN_SOFT:
   2191                 parts.add("keyssoft");
   2192                 break;
   2193             default:
   2194                 break;
   2195         }
   2196 
   2197         switch (config.keyboard) {
   2198             case Configuration.KEYBOARD_NOKEYS:
   2199                 parts.add("nokeys");
   2200                 break;
   2201             case Configuration.KEYBOARD_QWERTY:
   2202                 parts.add("qwerty");
   2203                 break;
   2204             case Configuration.KEYBOARD_12KEY:
   2205                 parts.add("12key");
   2206                 break;
   2207             default:
   2208                 break;
   2209         }
   2210 
   2211         switch (config.navigationHidden) {
   2212             case Configuration.NAVIGATIONHIDDEN_NO:
   2213                 parts.add("navexposed");
   2214                 break;
   2215             case Configuration.NAVIGATIONHIDDEN_YES:
   2216                 parts.add("navhidden");
   2217                 break;
   2218             default:
   2219                 break;
   2220         }
   2221 
   2222         switch (config.navigation) {
   2223             case Configuration.NAVIGATION_NONAV:
   2224                 parts.add("nonav");
   2225                 break;
   2226             case Configuration.NAVIGATION_DPAD:
   2227                 parts.add("dpad");
   2228                 break;
   2229             case Configuration.NAVIGATION_TRACKBALL:
   2230                 parts.add("trackball");
   2231                 break;
   2232             case Configuration.NAVIGATION_WHEEL:
   2233                 parts.add("wheel");
   2234                 break;
   2235             default:
   2236                 break;
   2237         }
   2238 
   2239         if (metrics != null) {
   2240             final int width, height;
   2241             if (metrics.widthPixels >= metrics.heightPixels) {
   2242                 width = metrics.widthPixels;
   2243                 height = metrics.heightPixels;
   2244             } else {
   2245                 //noinspection SuspiciousNameCombination
   2246                 width = metrics.heightPixels;
   2247                 //noinspection SuspiciousNameCombination
   2248                 height = metrics.widthPixels;
   2249             }
   2250             parts.add(width + "x" + height);
   2251         }
   2252 
   2253         parts.add("v" + Build.VERSION.RESOURCES_SDK_INT);
   2254         return TextUtils.join("-", parts);
   2255     }
   2256 
   2257     /**
   2258      * Generate a delta Configuration between <code>base</code> and <code>change</code>. The
   2259      * resulting delta can be used with {@link #updateFrom(Configuration)}.
   2260      * <p />
   2261      * Caveat: If the any of the Configuration's members becomes undefined, then
   2262      * {@link #updateFrom(Configuration)} will treat it as a no-op and not update that member.
   2263      *
   2264      * This is fine for device configurations as no member is ever undefined.
   2265      * {@hide}
   2266      */
   2267     public static Configuration generateDelta(Configuration base, Configuration change) {
   2268         final Configuration delta = new Configuration();
   2269         if (base.fontScale != change.fontScale) {
   2270             delta.fontScale = change.fontScale;
   2271         }
   2272 
   2273         if (base.mcc != change.mcc) {
   2274             delta.mcc = change.mcc;
   2275         }
   2276 
   2277         if (base.mnc != change.mnc) {
   2278             delta.mnc = change.mnc;
   2279         }
   2280 
   2281         base.fixUpLocaleList();
   2282         change.fixUpLocaleList();
   2283         if (!base.mLocaleList.equals(change.mLocaleList))  {
   2284             delta.mLocaleList = change.mLocaleList;
   2285             delta.locale = change.locale;
   2286         }
   2287 
   2288         if (base.touchscreen != change.touchscreen) {
   2289             delta.touchscreen = change.touchscreen;
   2290         }
   2291 
   2292         if (base.keyboard != change.keyboard) {
   2293             delta.keyboard = change.keyboard;
   2294         }
   2295 
   2296         if (base.keyboardHidden != change.keyboardHidden) {
   2297             delta.keyboardHidden = change.keyboardHidden;
   2298         }
   2299 
   2300         if (base.navigation != change.navigation) {
   2301             delta.navigation = change.navigation;
   2302         }
   2303 
   2304         if (base.navigationHidden != change.navigationHidden) {
   2305             delta.navigationHidden = change.navigationHidden;
   2306         }
   2307 
   2308         if (base.orientation != change.orientation) {
   2309             delta.orientation = change.orientation;
   2310         }
   2311 
   2312         if ((base.screenLayout & SCREENLAYOUT_SIZE_MASK) !=
   2313                 (change.screenLayout & SCREENLAYOUT_SIZE_MASK)) {
   2314             delta.screenLayout |= change.screenLayout & SCREENLAYOUT_SIZE_MASK;
   2315         }
   2316 
   2317         if ((base.screenLayout & SCREENLAYOUT_LAYOUTDIR_MASK) !=
   2318                 (change.screenLayout & SCREENLAYOUT_LAYOUTDIR_MASK)) {
   2319             delta.screenLayout |= change.screenLayout & SCREENLAYOUT_LAYOUTDIR_MASK;
   2320         }
   2321 
   2322         if ((base.screenLayout & SCREENLAYOUT_LONG_MASK) !=
   2323                 (change.screenLayout & SCREENLAYOUT_LONG_MASK)) {
   2324             delta.screenLayout |= change.screenLayout & SCREENLAYOUT_LONG_MASK;
   2325         }
   2326 
   2327         if ((base.screenLayout & SCREENLAYOUT_ROUND_MASK) !=
   2328                 (change.screenLayout & SCREENLAYOUT_ROUND_MASK)) {
   2329             delta.screenLayout |= change.screenLayout & SCREENLAYOUT_ROUND_MASK;
   2330         }
   2331 
   2332         if ((base.colorMode & COLOR_MODE_WIDE_COLOR_GAMUT_MASK) !=
   2333                 (change.colorMode & COLOR_MODE_WIDE_COLOR_GAMUT_MASK)) {
   2334             delta.colorMode |= change.colorMode & COLOR_MODE_WIDE_COLOR_GAMUT_MASK;
   2335         }
   2336 
   2337         if ((base.colorMode & COLOR_MODE_HDR_MASK) !=
   2338                 (change.colorMode & COLOR_MODE_HDR_MASK)) {
   2339             delta.colorMode |= change.colorMode & COLOR_MODE_HDR_MASK;
   2340         }
   2341 
   2342         if ((base.uiMode & UI_MODE_TYPE_MASK) != (change.uiMode & UI_MODE_TYPE_MASK)) {
   2343             delta.uiMode |= change.uiMode & UI_MODE_TYPE_MASK;
   2344         }
   2345 
   2346         if ((base.uiMode & UI_MODE_NIGHT_MASK) != (change.uiMode & UI_MODE_NIGHT_MASK)) {
   2347             delta.uiMode |= change.uiMode & UI_MODE_NIGHT_MASK;
   2348         }
   2349 
   2350         if (base.screenWidthDp != change.screenWidthDp) {
   2351             delta.screenWidthDp = change.screenWidthDp;
   2352         }
   2353 
   2354         if (base.screenHeightDp != change.screenHeightDp) {
   2355             delta.screenHeightDp = change.screenHeightDp;
   2356         }
   2357 
   2358         if (base.smallestScreenWidthDp != change.smallestScreenWidthDp) {
   2359             delta.smallestScreenWidthDp = change.smallestScreenWidthDp;
   2360         }
   2361 
   2362         if (base.densityDpi != change.densityDpi) {
   2363             delta.densityDpi = change.densityDpi;
   2364         }
   2365 
   2366         if (base.assetsSeq != change.assetsSeq) {
   2367             delta.assetsSeq = change.assetsSeq;
   2368         }
   2369 
   2370         if (!base.windowConfiguration.equals(change.windowConfiguration)) {
   2371             delta.windowConfiguration.setTo(change.windowConfiguration);
   2372         }
   2373         return delta;
   2374     }
   2375 
   2376     private static final String XML_ATTR_FONT_SCALE = "fs";
   2377     private static final String XML_ATTR_MCC = "mcc";
   2378     private static final String XML_ATTR_MNC = "mnc";
   2379     private static final String XML_ATTR_LOCALES = "locales";
   2380     private static final String XML_ATTR_TOUCHSCREEN = "touch";
   2381     private static final String XML_ATTR_KEYBOARD = "key";
   2382     private static final String XML_ATTR_KEYBOARD_HIDDEN = "keyHid";
   2383     private static final String XML_ATTR_HARD_KEYBOARD_HIDDEN = "hardKeyHid";
   2384     private static final String XML_ATTR_NAVIGATION = "nav";
   2385     private static final String XML_ATTR_NAVIGATION_HIDDEN = "navHid";
   2386     private static final String XML_ATTR_ORIENTATION = "ori";
   2387     private static final String XML_ATTR_ROTATION = "rot";
   2388     private static final String XML_ATTR_SCREEN_LAYOUT = "scrLay";
   2389     private static final String XML_ATTR_COLOR_MODE = "clrMod";
   2390     private static final String XML_ATTR_UI_MODE = "ui";
   2391     private static final String XML_ATTR_SCREEN_WIDTH = "width";
   2392     private static final String XML_ATTR_SCREEN_HEIGHT = "height";
   2393     private static final String XML_ATTR_SMALLEST_WIDTH = "sw";
   2394     private static final String XML_ATTR_DENSITY = "density";
   2395     private static final String XML_ATTR_APP_BOUNDS = "app_bounds";
   2396 
   2397     /**
   2398      * Reads the attributes corresponding to Configuration member fields from the Xml parser.
   2399      * The parser is expected to be on a tag which has Configuration attributes.
   2400      *
   2401      * @param parser The Xml parser from which to read attributes.
   2402      * @param configOut The Configuration to populate from the Xml attributes.
   2403      * {@hide}
   2404      */
   2405     public static void readXmlAttrs(XmlPullParser parser, Configuration configOut)
   2406             throws XmlPullParserException, IOException {
   2407         configOut.fontScale = Float.intBitsToFloat(
   2408                 XmlUtils.readIntAttribute(parser, XML_ATTR_FONT_SCALE, 0));
   2409         configOut.mcc = XmlUtils.readIntAttribute(parser, XML_ATTR_MCC, 0);
   2410         configOut.mnc = XmlUtils.readIntAttribute(parser, XML_ATTR_MNC, 0);
   2411 
   2412         final String localesStr = XmlUtils.readStringAttribute(parser, XML_ATTR_LOCALES);
   2413         configOut.mLocaleList = LocaleList.forLanguageTags(localesStr);
   2414         configOut.locale = configOut.mLocaleList.get(0);
   2415 
   2416         configOut.touchscreen = XmlUtils.readIntAttribute(parser, XML_ATTR_TOUCHSCREEN,
   2417                 TOUCHSCREEN_UNDEFINED);
   2418         configOut.keyboard = XmlUtils.readIntAttribute(parser, XML_ATTR_KEYBOARD,
   2419                 KEYBOARD_UNDEFINED);
   2420         configOut.keyboardHidden = XmlUtils.readIntAttribute(parser, XML_ATTR_KEYBOARD_HIDDEN,
   2421                 KEYBOARDHIDDEN_UNDEFINED);
   2422         configOut.hardKeyboardHidden =
   2423                 XmlUtils.readIntAttribute(parser, XML_ATTR_HARD_KEYBOARD_HIDDEN,
   2424                         HARDKEYBOARDHIDDEN_UNDEFINED);
   2425         configOut.navigation = XmlUtils.readIntAttribute(parser, XML_ATTR_NAVIGATION,
   2426                 NAVIGATION_UNDEFINED);
   2427         configOut.navigationHidden = XmlUtils.readIntAttribute(parser, XML_ATTR_NAVIGATION_HIDDEN,
   2428                 NAVIGATIONHIDDEN_UNDEFINED);
   2429         configOut.orientation = XmlUtils.readIntAttribute(parser, XML_ATTR_ORIENTATION,
   2430                 ORIENTATION_UNDEFINED);
   2431         configOut.screenLayout = XmlUtils.readIntAttribute(parser, XML_ATTR_SCREEN_LAYOUT,
   2432                 SCREENLAYOUT_UNDEFINED);
   2433         configOut.colorMode = XmlUtils.readIntAttribute(parser, XML_ATTR_COLOR_MODE,
   2434                 COLOR_MODE_UNDEFINED);
   2435         configOut.uiMode = XmlUtils.readIntAttribute(parser, XML_ATTR_UI_MODE, 0);
   2436         configOut.screenWidthDp = XmlUtils.readIntAttribute(parser, XML_ATTR_SCREEN_WIDTH,
   2437                 SCREEN_WIDTH_DP_UNDEFINED);
   2438         configOut.screenHeightDp = XmlUtils.readIntAttribute(parser, XML_ATTR_SCREEN_HEIGHT,
   2439                 SCREEN_HEIGHT_DP_UNDEFINED);
   2440         configOut.smallestScreenWidthDp =
   2441                 XmlUtils.readIntAttribute(parser, XML_ATTR_SMALLEST_WIDTH,
   2442                         SMALLEST_SCREEN_WIDTH_DP_UNDEFINED);
   2443         configOut.densityDpi = XmlUtils.readIntAttribute(parser, XML_ATTR_DENSITY,
   2444                 DENSITY_DPI_UNDEFINED);
   2445 
   2446         // For persistence, we don't care about assetsSeq and WindowConfiguration, so do not read it
   2447         // out.
   2448     }
   2449 
   2450 
   2451     /**
   2452      * Writes the Configuration's member fields as attributes into the XmlSerializer.
   2453      * The serializer is expected to have already started a tag so that attributes can be
   2454      * immediately written.
   2455      *
   2456      * @param xml The serializer to which to write the attributes.
   2457      * @param config The Configuration whose member fields to write.
   2458      * {@hide}
   2459      */
   2460     public static void writeXmlAttrs(XmlSerializer xml, Configuration config) throws IOException {
   2461         XmlUtils.writeIntAttribute(xml, XML_ATTR_FONT_SCALE,
   2462                 Float.floatToIntBits(config.fontScale));
   2463         if (config.mcc != 0) {
   2464             XmlUtils.writeIntAttribute(xml, XML_ATTR_MCC, config.mcc);
   2465         }
   2466         if (config.mnc != 0) {
   2467             XmlUtils.writeIntAttribute(xml, XML_ATTR_MNC, config.mnc);
   2468         }
   2469         config.fixUpLocaleList();
   2470         if (!config.mLocaleList.isEmpty()) {
   2471            XmlUtils.writeStringAttribute(xml, XML_ATTR_LOCALES, config.mLocaleList.toLanguageTags());
   2472         }
   2473         if (config.touchscreen != TOUCHSCREEN_UNDEFINED) {
   2474             XmlUtils.writeIntAttribute(xml, XML_ATTR_TOUCHSCREEN, config.touchscreen);
   2475         }
   2476         if (config.keyboard != KEYBOARD_UNDEFINED) {
   2477             XmlUtils.writeIntAttribute(xml, XML_ATTR_KEYBOARD, config.keyboard);
   2478         }
   2479         if (config.keyboardHidden != KEYBOARDHIDDEN_UNDEFINED) {
   2480             XmlUtils.writeIntAttribute(xml, XML_ATTR_KEYBOARD_HIDDEN, config.keyboardHidden);
   2481         }
   2482         if (config.hardKeyboardHidden != HARDKEYBOARDHIDDEN_UNDEFINED) {
   2483             XmlUtils.writeIntAttribute(xml, XML_ATTR_HARD_KEYBOARD_HIDDEN,
   2484                     config.hardKeyboardHidden);
   2485         }
   2486         if (config.navigation != NAVIGATION_UNDEFINED) {
   2487             XmlUtils.writeIntAttribute(xml, XML_ATTR_NAVIGATION, config.navigation);
   2488         }
   2489         if (config.navigationHidden != NAVIGATIONHIDDEN_UNDEFINED) {
   2490             XmlUtils.writeIntAttribute(xml, XML_ATTR_NAVIGATION_HIDDEN, config.navigationHidden);
   2491         }
   2492         if (config.orientation != ORIENTATION_UNDEFINED) {
   2493             XmlUtils.writeIntAttribute(xml, XML_ATTR_ORIENTATION, config.orientation);
   2494         }
   2495         if (config.screenLayout != SCREENLAYOUT_UNDEFINED) {
   2496             XmlUtils.writeIntAttribute(xml, XML_ATTR_SCREEN_LAYOUT, config.screenLayout);
   2497         }
   2498         if (config.colorMode != COLOR_MODE_UNDEFINED) {
   2499             XmlUtils.writeIntAttribute(xml, XML_ATTR_COLOR_MODE, config.colorMode);
   2500         }
   2501         if (config.uiMode != 0) {
   2502             XmlUtils.writeIntAttribute(xml, XML_ATTR_UI_MODE, config.uiMode);
   2503         }
   2504         if (config.screenWidthDp != SCREEN_WIDTH_DP_UNDEFINED) {
   2505             XmlUtils.writeIntAttribute(xml, XML_ATTR_SCREEN_WIDTH, config.screenWidthDp);
   2506         }
   2507         if (config.screenHeightDp != SCREEN_HEIGHT_DP_UNDEFINED) {
   2508             XmlUtils.writeIntAttribute(xml, XML_ATTR_SCREEN_HEIGHT, config.screenHeightDp);
   2509         }
   2510         if (config.smallestScreenWidthDp != SMALLEST_SCREEN_WIDTH_DP_UNDEFINED) {
   2511             XmlUtils.writeIntAttribute(xml, XML_ATTR_SMALLEST_WIDTH, config.smallestScreenWidthDp);
   2512         }
   2513         if (config.densityDpi != DENSITY_DPI_UNDEFINED) {
   2514             XmlUtils.writeIntAttribute(xml, XML_ATTR_DENSITY, config.densityDpi);
   2515         }
   2516 
   2517         // For persistence, we do not care about assetsSeq and window configuration, so do not write
   2518         // it out.
   2519     }
   2520 }
   2521