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