Configuration.java revision 2c749d242759ea36c0229ea933f22b6363337b19
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 android.content.pm.ActivityInfo;
20import android.os.Build;
21import android.os.Parcel;
22import android.os.Parcelable;
23import android.text.TextUtils;
24import android.view.View;
25
26import java.text.Format;
27import java.util.ArrayList;
28import java.util.Locale;
29
30/**
31 * This class describes all device configuration information that can
32 * impact the resources the application retrieves.  This includes both
33 * user-specified configuration options (locale and scaling) as well
34 * as device configurations (such as input modes, screen size and screen orientation).
35 * <p>You can acquire this object from {@link Resources}, using {@link
36 * Resources#getConfiguration}. Thus, from an activity, you can get it by chaining the request
37 * with {@link android.app.Activity#getResources}:</p>
38 * <pre>Configuration config = getResources().getConfiguration();</pre>
39 */
40public final class Configuration implements Parcelable, Comparable<Configuration> {
41    /** @hide */
42    public static final Configuration EMPTY = new Configuration();
43
44    /**
45     * Current user preference for the scaling factor for fonts, relative
46     * to the base density scaling.
47     */
48    public float fontScale;
49
50    /**
51     * IMSI MCC (Mobile Country Code), corresponding to
52     * <a href="{@docRoot}guide/topics/resources/providing-resources.html#MccQualifier">mcc</a>
53     * resource qualifier.  0 if undefined.
54     */
55    public int mcc;
56
57    /**
58     * IMSI MNC (Mobile Network Code), corresponding to
59     * <a href="{@docRoot}guide/topics/resources/providing-resources.html#MccQualifier">mnc</a>
60     * resource qualifier.  0 if undefined. Note that the actual MNC may be 0; in order to check
61     * for this use the {@link #MNC_ZERO} symbol.
62     */
63    public int mnc;
64
65    /**
66     * Constant used to to represent MNC (Mobile Network Code) zero.
67     * 0 cannot be used, since it is used to represent an undefined MNC.
68     */
69    public static final int MNC_ZERO = 0xffff;
70
71    /**
72     * Current user preference for the locale, corresponding to
73     * <a href="{@docRoot}guide/topics/resources/providing-resources.html#LocaleQualifier">locale</a>
74     * resource qualifier.
75     */
76    public Locale locale;
77
78    /**
79     * Locale should persist on setting.  This is hidden because it is really
80     * questionable whether this is the right way to expose the functionality.
81     * @hide
82     */
83    public boolean userSetLocale;
84
85    /** Constant for {@link #screenLayout}: bits that encode the size. */
86    public static final int SCREENLAYOUT_SIZE_MASK = 0x0f;
87    /** Constant for {@link #screenLayout}: a {@link #SCREENLAYOUT_SIZE_MASK}
88     * value indicating that no size has been set. */
89    public static final int SCREENLAYOUT_SIZE_UNDEFINED = 0x00;
90    /** Constant for {@link #screenLayout}: a {@link #SCREENLAYOUT_SIZE_MASK}
91     * value indicating the screen is at least approximately 320x426 dp units,
92     * corresponds to the
93     * <a href="{@docRoot}guide/topics/resources/providing-resources.html#ScreenSizeQualifier">small</a>
94     * resource qualifier.
95     * See <a href="{@docRoot}guide/practices/screens_support.html">Supporting
96     * Multiple Screens</a> for more information. */
97    public static final int SCREENLAYOUT_SIZE_SMALL = 0x01;
98    /** Constant for {@link #screenLayout}: a {@link #SCREENLAYOUT_SIZE_MASK}
99     * value indicating the screen is at least approximately 320x470 dp units,
100     * corresponds to the
101     * <a href="{@docRoot}guide/topics/resources/providing-resources.html#ScreenSizeQualifier">normal</a>
102     * resource qualifier.
103     * See <a href="{@docRoot}guide/practices/screens_support.html">Supporting
104     * Multiple Screens</a> for more information. */
105    public static final int SCREENLAYOUT_SIZE_NORMAL = 0x02;
106    /** Constant for {@link #screenLayout}: a {@link #SCREENLAYOUT_SIZE_MASK}
107     * value indicating the screen is at least approximately 480x640 dp units,
108     * corresponds to the
109     * <a href="{@docRoot}guide/topics/resources/providing-resources.html#ScreenSizeQualifier">large</a>
110     * resource qualifier.
111     * See <a href="{@docRoot}guide/practices/screens_support.html">Supporting
112     * Multiple Screens</a> for more information. */
113    public static final int SCREENLAYOUT_SIZE_LARGE = 0x03;
114    /** Constant for {@link #screenLayout}: a {@link #SCREENLAYOUT_SIZE_MASK}
115     * value indicating the screen is at least approximately 720x960 dp units,
116     * corresponds to the
117     * <a href="{@docRoot}guide/topics/resources/providing-resources.html#ScreenSizeQualifier">xlarge</a>
118     * resource qualifier.
119     * See <a href="{@docRoot}guide/practices/screens_support.html">Supporting
120     * Multiple Screens</a> for more information.*/
121    public static final int SCREENLAYOUT_SIZE_XLARGE = 0x04;
122
123    /** Constant for {@link #screenLayout}: bits that encode the aspect ratio. */
124    public static final int SCREENLAYOUT_LONG_MASK = 0x30;
125    /** Constant for {@link #screenLayout}: a {@link #SCREENLAYOUT_LONG_MASK}
126     * value indicating that no size has been set. */
127    public static final int SCREENLAYOUT_LONG_UNDEFINED = 0x00;
128    /** Constant for {@link #screenLayout}: a {@link #SCREENLAYOUT_LONG_MASK}
129     * value that corresponds to the
130     * <a href="{@docRoot}guide/topics/resources/providing-resources.html#ScreenAspectQualifier">notlong</a>
131     * resource qualifier. */
132    public static final int SCREENLAYOUT_LONG_NO = 0x10;
133    /** Constant for {@link #screenLayout}: a {@link #SCREENLAYOUT_LONG_MASK}
134     * value that corresponds to the
135     * <a href="{@docRoot}guide/topics/resources/providing-resources.html#ScreenAspectQualifier">long</a>
136     * resource qualifier. */
137    public static final int SCREENLAYOUT_LONG_YES = 0x20;
138
139    /** Constant for {@link #screenLayout}: bits that encode the layout direction. */
140    public static final int SCREENLAYOUT_LAYOUTDIR_MASK = 0xC0;
141    /** Constant for {@link #screenLayout}: bits shift to get the layout direction. */
142    public static final int SCREENLAYOUT_LAYOUTDIR_SHIFT = 6;
143    /** Constant for {@link #screenLayout}: a {@link #SCREENLAYOUT_LAYOUTDIR_MASK}
144     * value indicating that no layout dir has been set. */
145    public static final int SCREENLAYOUT_LAYOUTDIR_UNDEFINED = 0x00;
146    /** Constant for {@link #screenLayout}: a {@link #SCREENLAYOUT_LAYOUTDIR_MASK}
147     * value indicating that a layout dir has been set to LTR. */
148    public static final int SCREENLAYOUT_LAYOUTDIR_LTR = 0x01 << SCREENLAYOUT_LAYOUTDIR_SHIFT;
149    /** Constant for {@link #screenLayout}: a {@link #SCREENLAYOUT_LAYOUTDIR_MASK}
150     * value indicating that a layout dir has been set to RTL. */
151    public static final int SCREENLAYOUT_LAYOUTDIR_RTL = 0x02 << SCREENLAYOUT_LAYOUTDIR_SHIFT;
152
153    /** Constant for {@link #screenLayout}: a value indicating that screenLayout is undefined */
154    public static final int SCREENLAYOUT_UNDEFINED = SCREENLAYOUT_SIZE_UNDEFINED |
155            SCREENLAYOUT_LONG_UNDEFINED | SCREENLAYOUT_LAYOUTDIR_UNDEFINED;
156
157    /**
158     * Special flag we generate to indicate that the screen layout requires
159     * us to use a compatibility mode for apps that are not modern layout
160     * aware.
161     * @hide
162     */
163    public static final int SCREENLAYOUT_COMPAT_NEEDED = 0x10000000;
164
165    /**
166     * Bit mask of overall layout of the screen.  Currently there are two
167     * fields:
168     * <p>The {@link #SCREENLAYOUT_SIZE_MASK} bits define the overall size
169     * of the screen.  They may be one of
170     * {@link #SCREENLAYOUT_SIZE_SMALL}, {@link #SCREENLAYOUT_SIZE_NORMAL},
171     * {@link #SCREENLAYOUT_SIZE_LARGE}, or {@link #SCREENLAYOUT_SIZE_XLARGE}.
172     *
173     * <p>The {@link #SCREENLAYOUT_LONG_MASK} defines whether the screen
174     * is wider/taller than normal.  They may be one of
175     * {@link #SCREENLAYOUT_LONG_NO} or {@link #SCREENLAYOUT_LONG_YES}.
176     *
177     * <p>The {@link #SCREENLAYOUT_LAYOUTDIR_MASK} defines whether the screen layout
178     * is either LTR or RTL.  They may be one of
179     * {@link #SCREENLAYOUT_LAYOUTDIR_LTR} or {@link #SCREENLAYOUT_LAYOUTDIR_RTL}.
180     *
181     * <p>See <a href="{@docRoot}guide/practices/screens_support.html">Supporting
182     * Multiple Screens</a> for more information.
183     */
184    public int screenLayout;
185
186    /** @hide */
187    static public int resetScreenLayout(int curLayout) {
188        return (curLayout&~(SCREENLAYOUT_LONG_MASK | SCREENLAYOUT_SIZE_MASK
189                        | SCREENLAYOUT_COMPAT_NEEDED))
190                | (SCREENLAYOUT_LONG_YES | SCREENLAYOUT_SIZE_XLARGE);
191    }
192
193    /** @hide */
194    static public int reduceScreenLayout(int curLayout, int longSizeDp, int shortSizeDp) {
195        int screenLayoutSize;
196        boolean screenLayoutLong;
197        boolean screenLayoutCompatNeeded;
198
199        // These semi-magic numbers define our compatibility modes for
200        // applications with different screens.  These are guarantees to
201        // app developers about the space they can expect for a particular
202        // configuration.  DO NOT CHANGE!
203        if (longSizeDp < 470) {
204            // This is shorter than an HVGA normal density screen (which
205            // is 480 pixels on its long side).
206            screenLayoutSize = SCREENLAYOUT_SIZE_SMALL;
207            screenLayoutLong = false;
208            screenLayoutCompatNeeded = false;
209        } else {
210            // What size is this screen screen?
211            if (longSizeDp >= 960 && shortSizeDp >= 720) {
212                // 1.5xVGA or larger screens at medium density are the point
213                // at which we consider it to be an extra large screen.
214                screenLayoutSize = SCREENLAYOUT_SIZE_XLARGE;
215            } else if (longSizeDp >= 640 && shortSizeDp >= 480) {
216                // VGA or larger screens at medium density are the point
217                // at which we consider it to be a large screen.
218                screenLayoutSize = SCREENLAYOUT_SIZE_LARGE;
219            } else {
220                screenLayoutSize = SCREENLAYOUT_SIZE_NORMAL;
221            }
222
223            // If this screen is wider than normal HVGA, or taller
224            // than FWVGA, then for old apps we want to run in size
225            // compatibility mode.
226            if (shortSizeDp > 321 || longSizeDp > 570) {
227                screenLayoutCompatNeeded = true;
228            } else {
229                screenLayoutCompatNeeded = false;
230            }
231
232            // Is this a long screen?
233            if (((longSizeDp*3)/5) >= (shortSizeDp-1)) {
234                // Anything wider than WVGA (5:3) is considering to be long.
235                screenLayoutLong = true;
236            } else {
237                screenLayoutLong = false;
238            }
239        }
240
241        // Now reduce the last screenLayout to not be better than what we
242        // have found.
243        if (!screenLayoutLong) {
244            curLayout = (curLayout&~SCREENLAYOUT_LONG_MASK) | SCREENLAYOUT_LONG_NO;
245        }
246        if (screenLayoutCompatNeeded) {
247            curLayout |= Configuration.SCREENLAYOUT_COMPAT_NEEDED;
248        }
249        int curSize = curLayout&SCREENLAYOUT_SIZE_MASK;
250        if (screenLayoutSize < curSize) {
251            curLayout = (curLayout&~SCREENLAYOUT_SIZE_MASK) | screenLayoutSize;
252        }
253        return curLayout;
254    }
255
256    /**
257     * Check if the Configuration's current {@link #screenLayout} is at
258     * least the given size.
259     *
260     * @param size The desired size, either {@link #SCREENLAYOUT_SIZE_SMALL},
261     * {@link #SCREENLAYOUT_SIZE_NORMAL}, {@link #SCREENLAYOUT_SIZE_LARGE}, or
262     * {@link #SCREENLAYOUT_SIZE_XLARGE}.
263     * @return Returns true if the current screen layout size is at least
264     * the given size.
265     */
266    public boolean isLayoutSizeAtLeast(int size) {
267        int cur = screenLayout&SCREENLAYOUT_SIZE_MASK;
268        if (cur == SCREENLAYOUT_SIZE_UNDEFINED) return false;
269        return cur >= size;
270    }
271
272    /** Constant for {@link #touchscreen}: a value indicating that no value has been set. */
273    public static final int TOUCHSCREEN_UNDEFINED = 0;
274    /** Constant for {@link #touchscreen}, value corresponding to the
275     * <a href="{@docRoot}guide/topics/resources/providing-resources.html#TouchscreenQualifier">notouch</a>
276     * resource qualifier. */
277    public static final int TOUCHSCREEN_NOTOUCH = 1;
278    /** @deprecated Not currently supported or used. */
279    @Deprecated public static final int TOUCHSCREEN_STYLUS = 2;
280    /** Constant for {@link #touchscreen}, value corresponding to the
281     * <a href="{@docRoot}guide/topics/resources/providing-resources.html#TouchscreenQualifier">finger</a>
282     * resource qualifier. */
283    public static final int TOUCHSCREEN_FINGER = 3;
284
285    /**
286     * The kind of touch screen attached to the device.
287     * One of: {@link #TOUCHSCREEN_NOTOUCH}, {@link #TOUCHSCREEN_FINGER}.
288     */
289    public int touchscreen;
290
291    /** Constant for {@link #keyboard}: a value indicating that no value has been set. */
292    public static final int KEYBOARD_UNDEFINED = 0;
293    /** Constant for {@link #keyboard}, value corresponding to the
294     * <a href="{@docRoot}guide/topics/resources/providing-resources.html#ImeQualifier">nokeys</a>
295     * resource qualifier. */
296    public static final int KEYBOARD_NOKEYS = 1;
297    /** Constant for {@link #keyboard}, value corresponding to the
298     * <a href="{@docRoot}guide/topics/resources/providing-resources.html#ImeQualifier">qwerty</a>
299     * resource qualifier. */
300    public static final int KEYBOARD_QWERTY = 2;
301    /** Constant for {@link #keyboard}, value corresponding to the
302     * <a href="{@docRoot}guide/topics/resources/providing-resources.html#ImeQualifier">12key</a>
303     * resource qualifier. */
304    public static final int KEYBOARD_12KEY = 3;
305
306    /**
307     * The kind of keyboard attached to the device.
308     * One of: {@link #KEYBOARD_NOKEYS}, {@link #KEYBOARD_QWERTY},
309     * {@link #KEYBOARD_12KEY}.
310     */
311    public int keyboard;
312
313    /** Constant for {@link #keyboardHidden}: a value indicating that no value has been set. */
314    public static final int KEYBOARDHIDDEN_UNDEFINED = 0;
315    /** Constant for {@link #keyboardHidden}, value corresponding to the
316     * <a href="{@docRoot}guide/topics/resources/providing-resources.html#KeyboardAvailQualifier">keysexposed</a>
317     * resource qualifier. */
318    public static final int KEYBOARDHIDDEN_NO = 1;
319    /** Constant for {@link #keyboardHidden}, value corresponding to the
320     * <a href="{@docRoot}guide/topics/resources/providing-resources.html#KeyboardAvailQualifier">keyshidden</a>
321     * resource qualifier. */
322    public static final int KEYBOARDHIDDEN_YES = 2;
323    /** Constant matching actual resource implementation. {@hide} */
324    public static final int KEYBOARDHIDDEN_SOFT = 3;
325
326    /**
327     * A flag indicating whether any keyboard is available.  Unlike
328     * {@link #hardKeyboardHidden}, this also takes into account a soft
329     * keyboard, so if the hard keyboard is hidden but there is soft
330     * keyboard available, it will be set to NO.  Value is one of:
331     * {@link #KEYBOARDHIDDEN_NO}, {@link #KEYBOARDHIDDEN_YES}.
332     */
333    public int keyboardHidden;
334
335    /** Constant for {@link #hardKeyboardHidden}: a value indicating that no value has been set. */
336    public static final int HARDKEYBOARDHIDDEN_UNDEFINED = 0;
337    /** Constant for {@link #hardKeyboardHidden}, value corresponding to the
338     * physical keyboard being exposed. */
339    public static final int HARDKEYBOARDHIDDEN_NO = 1;
340    /** Constant for {@link #hardKeyboardHidden}, value corresponding to the
341     * physical keyboard being hidden. */
342    public static final int HARDKEYBOARDHIDDEN_YES = 2;
343
344    /**
345     * A flag indicating whether the hard keyboard has been hidden.  This will
346     * be set on a device with a mechanism to hide the keyboard from the
347     * user, when that mechanism is closed.  One of:
348     * {@link #HARDKEYBOARDHIDDEN_NO}, {@link #HARDKEYBOARDHIDDEN_YES}.
349     */
350    public int hardKeyboardHidden;
351
352    /** Constant for {@link #navigation}: a value indicating that no value has been set. */
353    public static final int NAVIGATION_UNDEFINED = 0;
354    /** Constant for {@link #navigation}, value corresponding to the
355     * <a href="{@docRoot}guide/topics/resources/providing-resources.html#NavigationQualifier">nonav</a>
356     * resource qualifier. */
357    public static final int NAVIGATION_NONAV = 1;
358    /** Constant for {@link #navigation}, value corresponding to the
359     * <a href="{@docRoot}guide/topics/resources/providing-resources.html#NavigationQualifier">dpad</a>
360     * resource qualifier. */
361    public static final int NAVIGATION_DPAD = 2;
362    /** Constant for {@link #navigation}, value corresponding to the
363     * <a href="{@docRoot}guide/topics/resources/providing-resources.html#NavigationQualifier">trackball</a>
364     * resource qualifier. */
365    public static final int NAVIGATION_TRACKBALL = 3;
366    /** Constant for {@link #navigation}, value corresponding to the
367     * <a href="{@docRoot}guide/topics/resources/providing-resources.html#NavigationQualifier">wheel</a>
368     * resource qualifier. */
369    public static final int NAVIGATION_WHEEL = 4;
370
371    /**
372     * The kind of navigation method available on the device.
373     * One of: {@link #NAVIGATION_NONAV}, {@link #NAVIGATION_DPAD},
374     * {@link #NAVIGATION_TRACKBALL}, {@link #NAVIGATION_WHEEL}.
375     */
376    public int navigation;
377
378    /** Constant for {@link #navigationHidden}: a value indicating that no value has been set. */
379    public static final int NAVIGATIONHIDDEN_UNDEFINED = 0;
380    /** Constant for {@link #navigationHidden}, value corresponding to the
381     * <a href="{@docRoot}guide/topics/resources/providing-resources.html#NavAvailQualifier">navexposed</a>
382     * resource qualifier. */
383    public static final int NAVIGATIONHIDDEN_NO = 1;
384    /** Constant for {@link #navigationHidden}, value corresponding to the
385     * <a href="{@docRoot}guide/topics/resources/providing-resources.html#NavAvailQualifier">navhidden</a>
386     * resource qualifier. */
387    public static final int NAVIGATIONHIDDEN_YES = 2;
388
389    /**
390     * A flag indicating whether any 5-way or DPAD navigation available.
391     * This will be set on a device with a mechanism to hide the navigation
392     * controls from the user, when that mechanism is closed.  One of:
393     * {@link #NAVIGATIONHIDDEN_NO}, {@link #NAVIGATIONHIDDEN_YES}.
394     */
395    public int navigationHidden;
396
397    /** Constant for {@link #orientation}: a value indicating that no value has been set. */
398    public static final int ORIENTATION_UNDEFINED = 0;
399    /** Constant for {@link #orientation}, value corresponding to the
400     * <a href="{@docRoot}guide/topics/resources/providing-resources.html#OrientationQualifier">port</a>
401     * resource qualifier. */
402    public static final int ORIENTATION_PORTRAIT = 1;
403    /** Constant for {@link #orientation}, value corresponding to the
404     * <a href="{@docRoot}guide/topics/resources/providing-resources.html#OrientationQualifier">land</a>
405     * resource qualifier. */
406    public static final int ORIENTATION_LANDSCAPE = 2;
407    /** @deprecated Not currently supported or used. */
408    @Deprecated public static final int ORIENTATION_SQUARE = 3;
409
410    /**
411     * Overall orientation of the screen.  May be one of
412     * {@link #ORIENTATION_LANDSCAPE}, {@link #ORIENTATION_PORTRAIT}.
413     */
414    public int orientation;
415
416    /** Constant for {@link #uiMode}: bits that encode the mode type. */
417    public static final int UI_MODE_TYPE_MASK = 0x0f;
418    /** Constant for {@link #uiMode}: a {@link #UI_MODE_TYPE_MASK}
419     * value indicating that no mode type has been set. */
420    public static final int UI_MODE_TYPE_UNDEFINED = 0x00;
421    /** Constant for {@link #uiMode}: a {@link #UI_MODE_TYPE_MASK}
422     * value that corresponds to
423     * <a href="{@docRoot}guide/topics/resources/providing-resources.html#UiModeQualifier">no
424     * UI mode</a> resource qualifier specified. */
425    public static final int UI_MODE_TYPE_NORMAL = 0x01;
426    /** Constant for {@link #uiMode}: a {@link #UI_MODE_TYPE_MASK}
427     * value that corresponds to the
428     * <a href="{@docRoot}guide/topics/resources/providing-resources.html#UiModeQualifier">desk</a>
429     * resource qualifier. */
430    public static final int UI_MODE_TYPE_DESK = 0x02;
431    /** Constant for {@link #uiMode}: a {@link #UI_MODE_TYPE_MASK}
432     * value that corresponds to the
433     * <a href="{@docRoot}guide/topics/resources/providing-resources.html#UiModeQualifier">car</a>
434     * resource qualifier. */
435    public static final int UI_MODE_TYPE_CAR = 0x03;
436    /** Constant for {@link #uiMode}: a {@link #UI_MODE_TYPE_MASK}
437     * value that corresponds to the
438     * <a href="{@docRoot}guide/topics/resources/providing-resources.html#UiModeQualifier">television</a>
439     * resource qualifier. */
440    public static final int UI_MODE_TYPE_TELEVISION = 0x04;
441    /** Constant for {@link #uiMode}: a {@link #UI_MODE_TYPE_MASK}
442     * value that corresponds to the
443     * <a href="{@docRoot}guide/topics/resources/providing-resources.html#UiModeQualifier">appliance</a>
444     * resource qualifier. */
445    public static final int UI_MODE_TYPE_APPLIANCE = 0x05;
446    /** Constant for {@link #uiMode}: a {@link #UI_MODE_TYPE_MASK}
447     * value that corresponds to the
448     * <a href="{@docRoot}guide/topics/resources/providing-resources.html#UiModeQualifier">watch</a>
449     * resource qualifier. */
450    public static final int UI_MODE_TYPE_WATCH = 0x06;
451
452    /** Constant for {@link #uiMode}: bits that encode the night mode. */
453    public static final int UI_MODE_NIGHT_MASK = 0x30;
454    /** Constant for {@link #uiMode}: a {@link #UI_MODE_NIGHT_MASK}
455     * value indicating that no mode type has been set. */
456    public static final int UI_MODE_NIGHT_UNDEFINED = 0x00;
457    /** Constant for {@link #uiMode}: a {@link #UI_MODE_NIGHT_MASK}
458     * value that corresponds to the
459     * <a href="{@docRoot}guide/topics/resources/providing-resources.html#NightQualifier">notnight</a>
460     * resource qualifier. */
461    public static final int UI_MODE_NIGHT_NO = 0x10;
462    /** Constant for {@link #uiMode}: a {@link #UI_MODE_NIGHT_MASK}
463     * value that corresponds to the
464     * <a href="{@docRoot}guide/topics/resources/providing-resources.html#NightQualifier">night</a>
465     * resource qualifier. */
466    public static final int UI_MODE_NIGHT_YES = 0x20;
467
468    /**
469     * Bit mask of the ui mode.  Currently there are two fields:
470     * <p>The {@link #UI_MODE_TYPE_MASK} bits define the overall ui mode of the
471     * device. They may be one of {@link #UI_MODE_TYPE_UNDEFINED},
472     * {@link #UI_MODE_TYPE_NORMAL}, {@link #UI_MODE_TYPE_DESK},
473     * {@link #UI_MODE_TYPE_CAR}, {@link #UI_MODE_TYPE_TELEVISION},
474     * {@link #UI_MODE_TYPE_APPLIANCE}, or {@link #UI_MODE_TYPE_WATCH}.
475     *
476     * <p>The {@link #UI_MODE_NIGHT_MASK} defines whether the screen
477     * is in a special mode. They may be one of {@link #UI_MODE_NIGHT_UNDEFINED},
478     * {@link #UI_MODE_NIGHT_NO} or {@link #UI_MODE_NIGHT_YES}.
479     */
480    public int uiMode;
481
482    /**
483     * Default value for {@link #screenWidthDp} indicating that no width
484     * has been specified.
485     */
486    public static final int SCREEN_WIDTH_DP_UNDEFINED = 0;
487
488    /**
489     * The current width of the available screen space, in dp units,
490     * corresponding to
491     * <a href="{@docRoot}guide/topics/resources/providing-resources.html#ScreenWidthQualifier">screen
492     * width</a> resource qualifier.  Set to
493     * {@link #SCREEN_WIDTH_DP_UNDEFINED} if no width is specified.
494     */
495    public int screenWidthDp;
496
497    /**
498     * Default value for {@link #screenHeightDp} indicating that no width
499     * has been specified.
500     */
501    public static final int SCREEN_HEIGHT_DP_UNDEFINED = 0;
502
503    /**
504     * The current height of the available screen space, in dp units,
505     * corresponding to
506     * <a href="{@docRoot}guide/topics/resources/providing-resources.html#ScreenHeightQualifier">screen
507     * height</a> resource qualifier.  Set to
508     * {@link #SCREEN_HEIGHT_DP_UNDEFINED} if no height is specified.
509     */
510    public int screenHeightDp;
511
512    /**
513     * Default value for {@link #smallestScreenWidthDp} indicating that no width
514     * has been specified.
515     */
516    public static final int SMALLEST_SCREEN_WIDTH_DP_UNDEFINED = 0;
517
518    /**
519     * The smallest screen size an application will see in normal operation,
520     * corresponding to
521     * <a href="{@docRoot}guide/topics/resources/providing-resources.html#SmallestScreenWidthQualifier">smallest
522     * screen width</a> resource qualifier.
523     * This is the smallest value of both screenWidthDp and screenHeightDp
524     * in both portrait and landscape.  Set to
525     * {@link #SMALLEST_SCREEN_WIDTH_DP_UNDEFINED} if no width is specified.
526     */
527    public int smallestScreenWidthDp;
528
529    /**
530     * Default value for {@link #densityDpi} indicating that no width
531     * has been specified.
532     */
533    public static final int DENSITY_DPI_UNDEFINED = 0;
534
535    /**
536     * The target screen density being rendered to,
537     * corresponding to
538     * <a href="{@docRoot}guide/topics/resources/providing-resources.html#DensityQualifier">density</a>
539     * resource qualifier.  Set to
540     * {@link #DENSITY_DPI_UNDEFINED} if no density is specified.
541     */
542    public int densityDpi;
543
544    /** @hide Hack to get this information from WM to app running in compat mode. */
545    public int compatScreenWidthDp;
546    /** @hide Hack to get this information from WM to app running in compat mode. */
547    public int compatScreenHeightDp;
548    /** @hide Hack to get this information from WM to app running in compat mode. */
549    public int compatSmallestScreenWidthDp;
550
551    /**
552     * @hide Internal book-keeping.
553     */
554    public int seq;
555
556    /** @hide Native-specific bit mask for MCC config; DO NOT USE UNLESS YOU ARE SURE. */
557    public static final int NATIVE_CONFIG_MCC = 0x0001;
558    /** @hide Native-specific bit mask for MNC config; DO NOT USE UNLESS YOU ARE SURE. */
559    public static final int NATIVE_CONFIG_MNC = 0x0002;
560    /** @hide Native-specific bit mask for LOCALE config; DO NOT USE UNLESS YOU ARE SURE. */
561    public static final int NATIVE_CONFIG_LOCALE = 0x0004;
562    /** @hide Native-specific bit mask for TOUCHSCREEN config; DO NOT USE UNLESS YOU ARE SURE. */
563    public static final int NATIVE_CONFIG_TOUCHSCREEN = 0x0008;
564    /** @hide Native-specific bit mask for KEYBOARD config; DO NOT USE UNLESS YOU ARE SURE. */
565    public static final int NATIVE_CONFIG_KEYBOARD = 0x0010;
566    /** @hide Native-specific bit mask for KEYBOARD_HIDDEN config; DO NOT USE UNLESS YOU
567     * ARE SURE. */
568    public static final int NATIVE_CONFIG_KEYBOARD_HIDDEN = 0x0020;
569    /** @hide Native-specific bit mask for NAVIGATION config; DO NOT USE UNLESS YOU ARE SURE. */
570    public static final int NATIVE_CONFIG_NAVIGATION = 0x0040;
571    /** @hide Native-specific bit mask for ORIENTATION config; DO NOT USE UNLESS YOU ARE SURE. */
572    public static final int NATIVE_CONFIG_ORIENTATION = 0x0080;
573    /** @hide Native-specific bit mask for DENSITY config; DO NOT USE UNLESS YOU ARE SURE. */
574    public static final int NATIVE_CONFIG_DENSITY = 0x0100;
575    /** @hide Native-specific bit mask for SCREEN_SIZE config; DO NOT USE UNLESS YOU ARE SURE. */
576    public static final int NATIVE_CONFIG_SCREEN_SIZE = 0x0200;
577    /** @hide Native-specific bit mask for VERSION config; DO NOT USE UNLESS YOU ARE SURE. */
578    public static final int NATIVE_CONFIG_VERSION = 0x0400;
579    /** @hide Native-specific bit mask for SCREEN_LAYOUT config; DO NOT USE UNLESS YOU ARE SURE. */
580    public static final int NATIVE_CONFIG_SCREEN_LAYOUT = 0x0800;
581    /** @hide Native-specific bit mask for UI_MODE config; DO NOT USE UNLESS YOU ARE SURE. */
582    public static final int NATIVE_CONFIG_UI_MODE = 0x1000;
583    /** @hide Native-specific bit mask for SMALLEST_SCREEN_SIZE config; DO NOT USE UNLESS YOU
584     * ARE SURE. */
585    public static final int NATIVE_CONFIG_SMALLEST_SCREEN_SIZE = 0x2000;
586    /** @hide Native-specific bit mask for LAYOUTDIR config ; DO NOT USE UNLESS YOU ARE SURE.*/
587    public static final int NATIVE_CONFIG_LAYOUTDIR = 0x4000;
588
589    /**
590     * Construct an invalid Configuration.  You must call {@link #setToDefaults}
591     * for this object to be valid.  {@more}
592     */
593    public Configuration() {
594        setToDefaults();
595    }
596
597    /**
598     * Makes a deep copy suitable for modification.
599     */
600    public Configuration(Configuration o) {
601        setTo(o);
602    }
603
604    public void setTo(Configuration o) {
605        fontScale = o.fontScale;
606        mcc = o.mcc;
607        mnc = o.mnc;
608        if (o.locale != null) {
609            locale = (Locale) o.locale.clone();
610        }
611        userSetLocale = o.userSetLocale;
612        touchscreen = o.touchscreen;
613        keyboard = o.keyboard;
614        keyboardHidden = o.keyboardHidden;
615        hardKeyboardHidden = o.hardKeyboardHidden;
616        navigation = o.navigation;
617        navigationHidden = o.navigationHidden;
618        orientation = o.orientation;
619        screenLayout = o.screenLayout;
620        uiMode = o.uiMode;
621        screenWidthDp = o.screenWidthDp;
622        screenHeightDp = o.screenHeightDp;
623        smallestScreenWidthDp = o.smallestScreenWidthDp;
624        densityDpi = o.densityDpi;
625        compatScreenWidthDp = o.compatScreenWidthDp;
626        compatScreenHeightDp = o.compatScreenHeightDp;
627        compatSmallestScreenWidthDp = o.compatSmallestScreenWidthDp;
628        seq = o.seq;
629    }
630
631    public String toString() {
632        StringBuilder sb = new StringBuilder(128);
633        sb.append("{");
634        sb.append(fontScale);
635        sb.append(" ");
636        if (mcc != 0) {
637            sb.append(mcc);
638            sb.append("mcc");
639        } else {
640            sb.append("?mcc");
641        }
642        if (mnc != 0) {
643            sb.append(mnc);
644            sb.append("mnc");
645        } else {
646            sb.append("?mnc");
647        }
648        if (locale != null) {
649            sb.append(" ");
650            sb.append(locale);
651        } else {
652            sb.append(" ?locale");
653        }
654        int layoutDir = (screenLayout&SCREENLAYOUT_LAYOUTDIR_MASK);
655        switch (layoutDir) {
656            case SCREENLAYOUT_LAYOUTDIR_UNDEFINED: sb.append(" ?layoutDir"); break;
657            case SCREENLAYOUT_LAYOUTDIR_LTR: sb.append(" ldltr"); break;
658            case SCREENLAYOUT_LAYOUTDIR_RTL: sb.append(" ldrtl"); break;
659            default: sb.append(" layoutDir=");
660                sb.append(layoutDir >> SCREENLAYOUT_LAYOUTDIR_SHIFT); break;
661        }
662        if (smallestScreenWidthDp != SMALLEST_SCREEN_WIDTH_DP_UNDEFINED) {
663            sb.append(" sw"); sb.append(smallestScreenWidthDp); sb.append("dp");
664        } else {
665            sb.append(" ?swdp");
666        }
667        if (screenWidthDp != SCREEN_WIDTH_DP_UNDEFINED) {
668            sb.append(" w"); sb.append(screenWidthDp); sb.append("dp");
669        } else {
670            sb.append(" ?wdp");
671        }
672        if (screenHeightDp != SCREEN_HEIGHT_DP_UNDEFINED) {
673            sb.append(" h"); sb.append(screenHeightDp); sb.append("dp");
674        } else {
675            sb.append(" ?hdp");
676        }
677        if (densityDpi != DENSITY_DPI_UNDEFINED) {
678            sb.append(" "); sb.append(densityDpi); sb.append("dpi");
679        } else {
680            sb.append(" ?density");
681        }
682        switch ((screenLayout&SCREENLAYOUT_SIZE_MASK)) {
683            case SCREENLAYOUT_SIZE_UNDEFINED: sb.append(" ?lsize"); break;
684            case SCREENLAYOUT_SIZE_SMALL: sb.append(" smll"); break;
685            case SCREENLAYOUT_SIZE_NORMAL: sb.append(" nrml"); break;
686            case SCREENLAYOUT_SIZE_LARGE: sb.append(" lrg"); break;
687            case SCREENLAYOUT_SIZE_XLARGE: sb.append(" xlrg"); break;
688            default: sb.append(" layoutSize=");
689                    sb.append(screenLayout&SCREENLAYOUT_SIZE_MASK); break;
690        }
691        switch ((screenLayout&SCREENLAYOUT_LONG_MASK)) {
692            case SCREENLAYOUT_LONG_UNDEFINED: sb.append(" ?long"); break;
693            case SCREENLAYOUT_LONG_NO: /* not-long is not interesting to print */ break;
694            case SCREENLAYOUT_LONG_YES: sb.append(" long"); break;
695            default: sb.append(" layoutLong=");
696                    sb.append(screenLayout&SCREENLAYOUT_LONG_MASK); break;
697        }
698        switch (orientation) {
699            case ORIENTATION_UNDEFINED: sb.append(" ?orien"); break;
700            case ORIENTATION_LANDSCAPE: sb.append(" land"); break;
701            case ORIENTATION_PORTRAIT: sb.append(" port"); break;
702            default: sb.append(" orien="); sb.append(orientation); break;
703        }
704        switch ((uiMode&UI_MODE_TYPE_MASK)) {
705            case UI_MODE_TYPE_UNDEFINED: sb.append(" ?uimode"); break;
706            case UI_MODE_TYPE_NORMAL: /* normal is not interesting to print */ break;
707            case UI_MODE_TYPE_DESK: sb.append(" desk"); break;
708            case UI_MODE_TYPE_CAR: sb.append(" car"); break;
709            case UI_MODE_TYPE_TELEVISION: sb.append(" television"); break;
710            case UI_MODE_TYPE_APPLIANCE: sb.append(" appliance"); break;
711            case UI_MODE_TYPE_WATCH: sb.append(" watch"); break;
712            default: sb.append(" uimode="); sb.append(uiMode&UI_MODE_TYPE_MASK); break;
713        }
714        switch ((uiMode&UI_MODE_NIGHT_MASK)) {
715            case UI_MODE_NIGHT_UNDEFINED: sb.append(" ?night"); break;
716            case UI_MODE_NIGHT_NO: /* not-night is not interesting to print */ break;
717            case UI_MODE_NIGHT_YES: sb.append(" night"); break;
718            default: sb.append(" night="); sb.append(uiMode&UI_MODE_NIGHT_MASK); break;
719        }
720        switch (touchscreen) {
721            case TOUCHSCREEN_UNDEFINED: sb.append(" ?touch"); break;
722            case TOUCHSCREEN_NOTOUCH: sb.append(" -touch"); break;
723            case TOUCHSCREEN_STYLUS: sb.append(" stylus"); break;
724            case TOUCHSCREEN_FINGER: sb.append(" finger"); break;
725            default: sb.append(" touch="); sb.append(touchscreen); break;
726        }
727        switch (keyboard) {
728            case KEYBOARD_UNDEFINED: sb.append(" ?keyb"); break;
729            case KEYBOARD_NOKEYS: sb.append(" -keyb"); break;
730            case KEYBOARD_QWERTY: sb.append(" qwerty"); break;
731            case KEYBOARD_12KEY: sb.append(" 12key"); break;
732            default: sb.append(" keys="); sb.append(keyboard); break;
733        }
734        switch (keyboardHidden) {
735            case KEYBOARDHIDDEN_UNDEFINED: sb.append("/?"); break;
736            case KEYBOARDHIDDEN_NO: sb.append("/v"); break;
737            case KEYBOARDHIDDEN_YES: sb.append("/h"); break;
738            case KEYBOARDHIDDEN_SOFT: sb.append("/s"); break;
739            default: sb.append("/"); sb.append(keyboardHidden); break;
740        }
741        switch (hardKeyboardHidden) {
742            case HARDKEYBOARDHIDDEN_UNDEFINED: sb.append("/?"); break;
743            case HARDKEYBOARDHIDDEN_NO: sb.append("/v"); break;
744            case HARDKEYBOARDHIDDEN_YES: sb.append("/h"); break;
745            default: sb.append("/"); sb.append(hardKeyboardHidden); break;
746        }
747        switch (navigation) {
748            case NAVIGATION_UNDEFINED: sb.append(" ?nav"); break;
749            case NAVIGATION_NONAV: sb.append(" -nav"); break;
750            case NAVIGATION_DPAD: sb.append(" dpad"); break;
751            case NAVIGATION_TRACKBALL: sb.append(" tball"); break;
752            case NAVIGATION_WHEEL: sb.append(" wheel"); break;
753            default: sb.append(" nav="); sb.append(navigation); break;
754        }
755        switch (navigationHidden) {
756            case NAVIGATIONHIDDEN_UNDEFINED: sb.append("/?"); break;
757            case NAVIGATIONHIDDEN_NO: sb.append("/v"); break;
758            case NAVIGATIONHIDDEN_YES: sb.append("/h"); break;
759            default: sb.append("/"); sb.append(navigationHidden); break;
760        }
761        if (seq != 0) {
762            sb.append(" s.");
763            sb.append(seq);
764        }
765        sb.append('}');
766        return sb.toString();
767    }
768
769    /**
770     * Set this object to the system defaults.
771     */
772    public void setToDefaults() {
773        fontScale = 1;
774        mcc = mnc = 0;
775        locale = null;
776        userSetLocale = false;
777        touchscreen = TOUCHSCREEN_UNDEFINED;
778        keyboard = KEYBOARD_UNDEFINED;
779        keyboardHidden = KEYBOARDHIDDEN_UNDEFINED;
780        hardKeyboardHidden = HARDKEYBOARDHIDDEN_UNDEFINED;
781        navigation = NAVIGATION_UNDEFINED;
782        navigationHidden = NAVIGATIONHIDDEN_UNDEFINED;
783        orientation = ORIENTATION_UNDEFINED;
784        screenLayout = SCREENLAYOUT_UNDEFINED;
785        uiMode = UI_MODE_TYPE_UNDEFINED;
786        screenWidthDp = compatScreenWidthDp = SCREEN_WIDTH_DP_UNDEFINED;
787        screenHeightDp = compatScreenHeightDp = SCREEN_HEIGHT_DP_UNDEFINED;
788        smallestScreenWidthDp = compatSmallestScreenWidthDp = SMALLEST_SCREEN_WIDTH_DP_UNDEFINED;
789        densityDpi = DENSITY_DPI_UNDEFINED;
790        seq = 0;
791    }
792
793    /** {@hide} */
794    @Deprecated public void makeDefault() {
795        setToDefaults();
796    }
797
798    /**
799     * Copy the fields from delta into this Configuration object, keeping
800     * track of which ones have changed.  Any undefined fields in
801     * <var>delta</var> are ignored and not copied in to the current
802     * Configuration.
803     * @return Returns a bit mask of the changed fields, as per
804     * {@link #diff}.
805     */
806    public int updateFrom(Configuration delta) {
807        int changed = 0;
808        if (delta.fontScale > 0 && fontScale != delta.fontScale) {
809            changed |= ActivityInfo.CONFIG_FONT_SCALE;
810            fontScale = delta.fontScale;
811        }
812        if (delta.mcc != 0 && mcc != delta.mcc) {
813            changed |= ActivityInfo.CONFIG_MCC;
814            mcc = delta.mcc;
815        }
816        if (delta.mnc != 0 && mnc != delta.mnc) {
817            changed |= ActivityInfo.CONFIG_MNC;
818            mnc = delta.mnc;
819        }
820        if (delta.locale != null
821                && (locale == null || !locale.equals(delta.locale))) {
822            changed |= ActivityInfo.CONFIG_LOCALE;
823            locale = delta.locale != null
824                    ? (Locale) delta.locale.clone() : null;
825            // If locale has changed, then layout direction is also changed ...
826            changed |= ActivityInfo.CONFIG_LAYOUT_DIRECTION;
827            // ... and we need to update the layout direction (represented by the first
828            // 2 most significant bits in screenLayout).
829            setLayoutDirection(locale);
830        }
831        final int deltaScreenLayoutDir = delta.screenLayout & SCREENLAYOUT_LAYOUTDIR_MASK;
832        if (deltaScreenLayoutDir != SCREENLAYOUT_LAYOUTDIR_UNDEFINED &&
833                deltaScreenLayoutDir != (screenLayout & SCREENLAYOUT_LAYOUTDIR_MASK)) {
834            screenLayout = (screenLayout & ~SCREENLAYOUT_LAYOUTDIR_MASK) | deltaScreenLayoutDir;
835            changed |= ActivityInfo.CONFIG_LAYOUT_DIRECTION;
836        }
837        if (delta.userSetLocale && (!userSetLocale || ((changed & ActivityInfo.CONFIG_LOCALE) != 0)))
838        {
839            changed |= ActivityInfo.CONFIG_LOCALE;
840            userSetLocale = true;
841        }
842        if (delta.touchscreen != TOUCHSCREEN_UNDEFINED
843                && touchscreen != delta.touchscreen) {
844            changed |= ActivityInfo.CONFIG_TOUCHSCREEN;
845            touchscreen = delta.touchscreen;
846        }
847        if (delta.keyboard != KEYBOARD_UNDEFINED
848                && keyboard != delta.keyboard) {
849            changed |= ActivityInfo.CONFIG_KEYBOARD;
850            keyboard = delta.keyboard;
851        }
852        if (delta.keyboardHidden != KEYBOARDHIDDEN_UNDEFINED
853                && keyboardHidden != delta.keyboardHidden) {
854            changed |= ActivityInfo.CONFIG_KEYBOARD_HIDDEN;
855            keyboardHidden = delta.keyboardHidden;
856        }
857        if (delta.hardKeyboardHidden != HARDKEYBOARDHIDDEN_UNDEFINED
858                && hardKeyboardHidden != delta.hardKeyboardHidden) {
859            changed |= ActivityInfo.CONFIG_KEYBOARD_HIDDEN;
860            hardKeyboardHidden = delta.hardKeyboardHidden;
861        }
862        if (delta.navigation != NAVIGATION_UNDEFINED
863                && navigation != delta.navigation) {
864            changed |= ActivityInfo.CONFIG_NAVIGATION;
865            navigation = delta.navigation;
866        }
867        if (delta.navigationHidden != NAVIGATIONHIDDEN_UNDEFINED
868                && navigationHidden != delta.navigationHidden) {
869            changed |= ActivityInfo.CONFIG_KEYBOARD_HIDDEN;
870            navigationHidden = delta.navigationHidden;
871        }
872        if (delta.orientation != ORIENTATION_UNDEFINED
873                && orientation != delta.orientation) {
874            changed |= ActivityInfo.CONFIG_ORIENTATION;
875            orientation = delta.orientation;
876        }
877        if (getScreenLayoutNoDirection(delta.screenLayout) !=
878                    (SCREENLAYOUT_SIZE_UNDEFINED | SCREENLAYOUT_LONG_UNDEFINED)
879                && (getScreenLayoutNoDirection(screenLayout) !=
880                    getScreenLayoutNoDirection(delta.screenLayout))) {
881            changed |= ActivityInfo.CONFIG_SCREEN_LAYOUT;
882            // We need to preserve the previous layout dir bits if they were defined
883            if ((delta.screenLayout&SCREENLAYOUT_LAYOUTDIR_MASK) == 0) {
884                screenLayout = (screenLayout&SCREENLAYOUT_LAYOUTDIR_MASK)|delta.screenLayout;
885            } else {
886                screenLayout = delta.screenLayout;
887            }
888        }
889        if (delta.uiMode != (UI_MODE_TYPE_UNDEFINED|UI_MODE_NIGHT_UNDEFINED)
890                && uiMode != delta.uiMode) {
891            changed |= ActivityInfo.CONFIG_UI_MODE;
892            if ((delta.uiMode&UI_MODE_TYPE_MASK) != UI_MODE_TYPE_UNDEFINED) {
893                uiMode = (uiMode&~UI_MODE_TYPE_MASK)
894                        | (delta.uiMode&UI_MODE_TYPE_MASK);
895            }
896            if ((delta.uiMode&UI_MODE_NIGHT_MASK) != UI_MODE_NIGHT_UNDEFINED) {
897                uiMode = (uiMode&~UI_MODE_NIGHT_MASK)
898                        | (delta.uiMode&UI_MODE_NIGHT_MASK);
899            }
900        }
901        if (delta.screenWidthDp != SCREEN_WIDTH_DP_UNDEFINED
902                && screenWidthDp != delta.screenWidthDp) {
903            changed |= ActivityInfo.CONFIG_SCREEN_SIZE;
904            screenWidthDp = delta.screenWidthDp;
905        }
906        if (delta.screenHeightDp != SCREEN_HEIGHT_DP_UNDEFINED
907                && screenHeightDp != delta.screenHeightDp) {
908            changed |= ActivityInfo.CONFIG_SCREEN_SIZE;
909            screenHeightDp = delta.screenHeightDp;
910        }
911        if (delta.smallestScreenWidthDp != SMALLEST_SCREEN_WIDTH_DP_UNDEFINED
912                && smallestScreenWidthDp != delta.smallestScreenWidthDp) {
913            changed |= ActivityInfo.CONFIG_SMALLEST_SCREEN_SIZE;
914            smallestScreenWidthDp = delta.smallestScreenWidthDp;
915        }
916        if (delta.densityDpi != DENSITY_DPI_UNDEFINED &&
917                densityDpi != delta.densityDpi) {
918            changed |= ActivityInfo.CONFIG_DENSITY;
919            densityDpi = delta.densityDpi;
920        }
921        if (delta.compatScreenWidthDp != SCREEN_WIDTH_DP_UNDEFINED) {
922            compatScreenWidthDp = delta.compatScreenWidthDp;
923        }
924        if (delta.compatScreenHeightDp != SCREEN_HEIGHT_DP_UNDEFINED) {
925            compatScreenHeightDp = delta.compatScreenHeightDp;
926        }
927        if (delta.compatSmallestScreenWidthDp != SMALLEST_SCREEN_WIDTH_DP_UNDEFINED) {
928            compatSmallestScreenWidthDp = delta.compatSmallestScreenWidthDp;
929        }
930        if (delta.seq != 0) {
931            seq = delta.seq;
932        }
933
934        return changed;
935    }
936
937    /**
938     * Return a bit mask of the differences between this Configuration
939     * object and the given one.  Does not change the values of either.  Any
940     * undefined fields in <var>delta</var> are ignored.
941     * @return Returns a bit mask indicating which configuration
942     * values has changed, containing any combination of
943     * {@link android.content.pm.ActivityInfo#CONFIG_FONT_SCALE
944     * PackageManager.ActivityInfo.CONFIG_FONT_SCALE},
945     * {@link android.content.pm.ActivityInfo#CONFIG_MCC
946     * PackageManager.ActivityInfo.CONFIG_MCC},
947     * {@link android.content.pm.ActivityInfo#CONFIG_MNC
948     * PackageManager.ActivityInfo.CONFIG_MNC},
949     * {@link android.content.pm.ActivityInfo#CONFIG_LOCALE
950     * PackageManager.ActivityInfo.CONFIG_LOCALE},
951     * {@link android.content.pm.ActivityInfo#CONFIG_TOUCHSCREEN
952     * PackageManager.ActivityInfo.CONFIG_TOUCHSCREEN},
953     * {@link android.content.pm.ActivityInfo#CONFIG_KEYBOARD
954     * PackageManager.ActivityInfo.CONFIG_KEYBOARD},
955     * {@link android.content.pm.ActivityInfo#CONFIG_NAVIGATION
956     * PackageManager.ActivityInfo.CONFIG_NAVIGATION},
957     * {@link android.content.pm.ActivityInfo#CONFIG_ORIENTATION
958     * PackageManager.ActivityInfo.CONFIG_ORIENTATION},
959     * {@link android.content.pm.ActivityInfo#CONFIG_SCREEN_LAYOUT
960     * PackageManager.ActivityInfo.CONFIG_SCREEN_LAYOUT}, or
961     * {@link android.content.pm.ActivityInfo#CONFIG_SCREEN_SIZE
962     * PackageManager.ActivityInfo.CONFIG_SCREEN_SIZE}, or
963     * {@link android.content.pm.ActivityInfo#CONFIG_SMALLEST_SCREEN_SIZE
964     * PackageManager.ActivityInfo.CONFIG_SMALLEST_SCREEN_SIZE}.
965     * {@link android.content.pm.ActivityInfo#CONFIG_LAYOUT_DIRECTION
966     * PackageManager.ActivityInfo.CONFIG_LAYOUT_DIRECTION}.
967     */
968    public int diff(Configuration delta) {
969        int changed = 0;
970        if (delta.fontScale > 0 && fontScale != delta.fontScale) {
971            changed |= ActivityInfo.CONFIG_FONT_SCALE;
972        }
973        if (delta.mcc != 0 && mcc != delta.mcc) {
974            changed |= ActivityInfo.CONFIG_MCC;
975        }
976        if (delta.mnc != 0 && mnc != delta.mnc) {
977            changed |= ActivityInfo.CONFIG_MNC;
978        }
979        if (delta.locale != null
980                && (locale == null || !locale.equals(delta.locale))) {
981            changed |= ActivityInfo.CONFIG_LOCALE;
982            changed |= ActivityInfo.CONFIG_LAYOUT_DIRECTION;
983        }
984        final int deltaScreenLayoutDir = delta.screenLayout & SCREENLAYOUT_LAYOUTDIR_MASK;
985        if (deltaScreenLayoutDir != SCREENLAYOUT_LAYOUTDIR_UNDEFINED &&
986                deltaScreenLayoutDir != (screenLayout & SCREENLAYOUT_LAYOUTDIR_MASK)) {
987            changed |= ActivityInfo.CONFIG_LAYOUT_DIRECTION;
988        }
989        if (delta.touchscreen != TOUCHSCREEN_UNDEFINED
990                && touchscreen != delta.touchscreen) {
991            changed |= ActivityInfo.CONFIG_TOUCHSCREEN;
992        }
993        if (delta.keyboard != KEYBOARD_UNDEFINED
994                && keyboard != delta.keyboard) {
995            changed |= ActivityInfo.CONFIG_KEYBOARD;
996        }
997        if (delta.keyboardHidden != KEYBOARDHIDDEN_UNDEFINED
998                && keyboardHidden != delta.keyboardHidden) {
999            changed |= ActivityInfo.CONFIG_KEYBOARD_HIDDEN;
1000        }
1001        if (delta.hardKeyboardHidden != HARDKEYBOARDHIDDEN_UNDEFINED
1002                && hardKeyboardHidden != delta.hardKeyboardHidden) {
1003            changed |= ActivityInfo.CONFIG_KEYBOARD_HIDDEN;
1004        }
1005        if (delta.navigation != NAVIGATION_UNDEFINED
1006                && navigation != delta.navigation) {
1007            changed |= ActivityInfo.CONFIG_NAVIGATION;
1008        }
1009        if (delta.navigationHidden != NAVIGATIONHIDDEN_UNDEFINED
1010                && navigationHidden != delta.navigationHidden) {
1011            changed |= ActivityInfo.CONFIG_KEYBOARD_HIDDEN;
1012        }
1013        if (delta.orientation != ORIENTATION_UNDEFINED
1014                && orientation != delta.orientation) {
1015            changed |= ActivityInfo.CONFIG_ORIENTATION;
1016        }
1017        if (getScreenLayoutNoDirection(delta.screenLayout) !=
1018                    (SCREENLAYOUT_SIZE_UNDEFINED | SCREENLAYOUT_LONG_UNDEFINED)
1019                && getScreenLayoutNoDirection(screenLayout) !=
1020                    getScreenLayoutNoDirection(delta.screenLayout)) {
1021            changed |= ActivityInfo.CONFIG_SCREEN_LAYOUT;
1022        }
1023        if (delta.uiMode != (UI_MODE_TYPE_UNDEFINED|UI_MODE_NIGHT_UNDEFINED)
1024                && uiMode != delta.uiMode) {
1025            changed |= ActivityInfo.CONFIG_UI_MODE;
1026        }
1027        if (delta.screenWidthDp != SCREEN_WIDTH_DP_UNDEFINED
1028                && screenWidthDp != delta.screenWidthDp) {
1029            changed |= ActivityInfo.CONFIG_SCREEN_SIZE;
1030        }
1031        if (delta.screenHeightDp != SCREEN_HEIGHT_DP_UNDEFINED
1032                && screenHeightDp != delta.screenHeightDp) {
1033            changed |= ActivityInfo.CONFIG_SCREEN_SIZE;
1034        }
1035        if (delta.smallestScreenWidthDp != SMALLEST_SCREEN_WIDTH_DP_UNDEFINED
1036                && smallestScreenWidthDp != delta.smallestScreenWidthDp) {
1037            changed |= ActivityInfo.CONFIG_SMALLEST_SCREEN_SIZE;
1038        }
1039        if (delta.densityDpi != DENSITY_DPI_UNDEFINED
1040                && densityDpi != delta.densityDpi) {
1041            changed |= ActivityInfo.CONFIG_DENSITY;
1042        }
1043
1044        return changed;
1045    }
1046
1047    /**
1048     * Determine if a new resource needs to be loaded from the bit set of
1049     * configuration changes returned by {@link #updateFrom(Configuration)}.
1050     *
1051     * @param configChanges The mask of changes configurations as returned by
1052     * {@link #updateFrom(Configuration)}.
1053     * @param interestingChanges The configuration changes that the resource
1054     * can handled, as given in {@link android.util.TypedValue#changingConfigurations}.
1055     *
1056     * @return Return true if the resource needs to be loaded, else false.
1057     */
1058    public static boolean needNewResources(int configChanges, int interestingChanges) {
1059        return (configChanges & (interestingChanges|ActivityInfo.CONFIG_FONT_SCALE)) != 0;
1060    }
1061
1062    /**
1063     * @hide Return true if the sequence of 'other' is better than this.  Assumes
1064     * that 'this' is your current sequence and 'other' is a new one you have
1065     * received some how and want to compare with what you have.
1066     */
1067    public boolean isOtherSeqNewer(Configuration other) {
1068        if (other == null) {
1069            // Sanity check.
1070            return false;
1071        }
1072        if (other.seq == 0) {
1073            // If the other sequence is not specified, then we must assume
1074            // it is newer since we don't know any better.
1075            return true;
1076        }
1077        if (seq == 0) {
1078            // If this sequence is not specified, then we also consider the
1079            // other is better.  Yes we have a preference for other.  Sue us.
1080            return true;
1081        }
1082        int diff = other.seq - seq;
1083        if (diff > 0x10000) {
1084            // If there has been a sufficiently large jump, assume the
1085            // sequence has wrapped around.
1086            return false;
1087        }
1088        return diff > 0;
1089    }
1090
1091    /**
1092     * Parcelable methods
1093     */
1094    public int describeContents() {
1095        return 0;
1096    }
1097
1098    public void writeToParcel(Parcel dest, int flags) {
1099        dest.writeFloat(fontScale);
1100        dest.writeInt(mcc);
1101        dest.writeInt(mnc);
1102        if (locale == null) {
1103            dest.writeInt(0);
1104        } else {
1105            dest.writeInt(1);
1106            dest.writeString(locale.getLanguage());
1107            dest.writeString(locale.getCountry());
1108            dest.writeString(locale.getVariant());
1109        }
1110        if(userSetLocale) {
1111            dest.writeInt(1);
1112        } else {
1113            dest.writeInt(0);
1114        }
1115        dest.writeInt(touchscreen);
1116        dest.writeInt(keyboard);
1117        dest.writeInt(keyboardHidden);
1118        dest.writeInt(hardKeyboardHidden);
1119        dest.writeInt(navigation);
1120        dest.writeInt(navigationHidden);
1121        dest.writeInt(orientation);
1122        dest.writeInt(screenLayout);
1123        dest.writeInt(uiMode);
1124        dest.writeInt(screenWidthDp);
1125        dest.writeInt(screenHeightDp);
1126        dest.writeInt(smallestScreenWidthDp);
1127        dest.writeInt(densityDpi);
1128        dest.writeInt(compatScreenWidthDp);
1129        dest.writeInt(compatScreenHeightDp);
1130        dest.writeInt(compatSmallestScreenWidthDp);
1131        dest.writeInt(seq);
1132    }
1133
1134    public void readFromParcel(Parcel source) {
1135        fontScale = source.readFloat();
1136        mcc = source.readInt();
1137        mnc = source.readInt();
1138        if (source.readInt() != 0) {
1139            locale = new Locale(source.readString(), source.readString(),
1140                    source.readString());
1141        }
1142        userSetLocale = (source.readInt()==1);
1143        touchscreen = source.readInt();
1144        keyboard = source.readInt();
1145        keyboardHidden = source.readInt();
1146        hardKeyboardHidden = source.readInt();
1147        navigation = source.readInt();
1148        navigationHidden = source.readInt();
1149        orientation = source.readInt();
1150        screenLayout = source.readInt();
1151        uiMode = source.readInt();
1152        screenWidthDp = source.readInt();
1153        screenHeightDp = source.readInt();
1154        smallestScreenWidthDp = source.readInt();
1155        densityDpi = source.readInt();
1156        compatScreenWidthDp = source.readInt();
1157        compatScreenHeightDp = source.readInt();
1158        compatSmallestScreenWidthDp = source.readInt();
1159        seq = source.readInt();
1160    }
1161
1162    public static final Parcelable.Creator<Configuration> CREATOR
1163            = new Parcelable.Creator<Configuration>() {
1164        public Configuration createFromParcel(Parcel source) {
1165            return new Configuration(source);
1166        }
1167
1168        public Configuration[] newArray(int size) {
1169            return new Configuration[size];
1170        }
1171    };
1172
1173    /**
1174     * Construct this Configuration object, reading from the Parcel.
1175     */
1176    private Configuration(Parcel source) {
1177        readFromParcel(source);
1178    }
1179
1180    public int compareTo(Configuration that) {
1181        int n;
1182        float a = this.fontScale;
1183        float b = that.fontScale;
1184        if (a < b) return -1;
1185        if (a > b) return 1;
1186        n = this.mcc - that.mcc;
1187        if (n != 0) return n;
1188        n = this.mnc - that.mnc;
1189        if (n != 0) return n;
1190        if (this.locale == null) {
1191            if (that.locale != null) return 1;
1192        } else if (that.locale == null) {
1193            return -1;
1194        } else {
1195            n = this.locale.getLanguage().compareTo(that.locale.getLanguage());
1196            if (n != 0) return n;
1197            n = this.locale.getCountry().compareTo(that.locale.getCountry());
1198            if (n != 0) return n;
1199            n = this.locale.getVariant().compareTo(that.locale.getVariant());
1200            if (n != 0) return n;
1201        }
1202        n = this.touchscreen - that.touchscreen;
1203        if (n != 0) return n;
1204        n = this.keyboard - that.keyboard;
1205        if (n != 0) return n;
1206        n = this.keyboardHidden - that.keyboardHidden;
1207        if (n != 0) return n;
1208        n = this.hardKeyboardHidden - that.hardKeyboardHidden;
1209        if (n != 0) return n;
1210        n = this.navigation - that.navigation;
1211        if (n != 0) return n;
1212        n = this.navigationHidden - that.navigationHidden;
1213        if (n != 0) return n;
1214        n = this.orientation - that.orientation;
1215        if (n != 0) return n;
1216        n = this.screenLayout - that.screenLayout;
1217        if (n != 0) return n;
1218        n = this.uiMode - that.uiMode;
1219        if (n != 0) return n;
1220        n = this.screenWidthDp - that.screenWidthDp;
1221        if (n != 0) return n;
1222        n = this.screenHeightDp - that.screenHeightDp;
1223        if (n != 0) return n;
1224        n = this.smallestScreenWidthDp - that.smallestScreenWidthDp;
1225        if (n != 0) return n;
1226        n = this.densityDpi - that.densityDpi;
1227        //if (n != 0) return n;
1228        return n;
1229    }
1230
1231    public boolean equals(Configuration that) {
1232        if (that == null) return false;
1233        if (that == this) return true;
1234        return this.compareTo(that) == 0;
1235    }
1236
1237    public boolean equals(Object that) {
1238        try {
1239            return equals((Configuration)that);
1240        } catch (ClassCastException e) {
1241        }
1242        return false;
1243    }
1244
1245    public int hashCode() {
1246        int result = 17;
1247        result = 31 * result + Float.floatToIntBits(fontScale);
1248        result = 31 * result + mcc;
1249        result = 31 * result + mnc;
1250        result = 31 * result + (locale != null ? locale.hashCode() : 0);
1251        result = 31 * result + touchscreen;
1252        result = 31 * result + keyboard;
1253        result = 31 * result + keyboardHidden;
1254        result = 31 * result + hardKeyboardHidden;
1255        result = 31 * result + navigation;
1256        result = 31 * result + navigationHidden;
1257        result = 31 * result + orientation;
1258        result = 31 * result + screenLayout;
1259        result = 31 * result + uiMode;
1260        result = 31 * result + screenWidthDp;
1261        result = 31 * result + screenHeightDp;
1262        result = 31 * result + smallestScreenWidthDp;
1263        result = 31 * result + densityDpi;
1264        return result;
1265    }
1266
1267    /**
1268     * Set the locale. This is the preferred way for setting up the locale (instead of using the
1269     * direct accessor). This will also set the userLocale and layout direction according to
1270     * the locale.
1271     *
1272     * @param loc The locale. Can be null.
1273     */
1274    public void setLocale(Locale loc) {
1275        locale = loc;
1276        userSetLocale = true;
1277        setLayoutDirection(locale);
1278    }
1279
1280    /**
1281     * Return the layout direction. Will be either {@link View#LAYOUT_DIRECTION_LTR} or
1282     * {@link View#LAYOUT_DIRECTION_RTL}.
1283     *
1284     * @return Returns {@link View#LAYOUT_DIRECTION_RTL} if the configuration
1285     * is {@link #SCREENLAYOUT_LAYOUTDIR_RTL}, otherwise {@link View#LAYOUT_DIRECTION_LTR}.
1286     */
1287    public int getLayoutDirection() {
1288        return (screenLayout&SCREENLAYOUT_LAYOUTDIR_MASK) == SCREENLAYOUT_LAYOUTDIR_RTL
1289                ? View.LAYOUT_DIRECTION_RTL : View.LAYOUT_DIRECTION_LTR;
1290    }
1291
1292    /**
1293     * Set the layout direction from the Locale.
1294     *
1295     * @param locale The Locale. If null will set the layout direction to
1296     * {@link View#LAYOUT_DIRECTION_LTR}. If not null will set it to the layout direction
1297     * corresponding to the Locale.
1298     *
1299     * @see {@link View#LAYOUT_DIRECTION_LTR} and {@link View#LAYOUT_DIRECTION_RTL}
1300     */
1301    public void setLayoutDirection(Locale locale) {
1302        // There is a "1" difference between the configuration values for
1303        // layout direction and View constants for layout direction, just add "1".
1304        final int layoutDirection = 1 + TextUtils.getLayoutDirectionFromLocale(locale);
1305        screenLayout = (screenLayout&~SCREENLAYOUT_LAYOUTDIR_MASK)|
1306                (layoutDirection << SCREENLAYOUT_LAYOUTDIR_SHIFT);
1307    }
1308
1309    private static int getScreenLayoutNoDirection(int screenLayout) {
1310        return screenLayout&~SCREENLAYOUT_LAYOUTDIR_MASK;
1311    }
1312
1313    /**
1314     *
1315     * @hide
1316     */
1317    public static String localeToResourceQualifier(Locale locale) {
1318        StringBuilder sb = new StringBuilder();
1319        boolean l = (locale.getLanguage().length() != 0);
1320        boolean c = (locale.getCountry().length() != 0);
1321        boolean s = (locale.getScript().length() != 0);
1322        boolean v = (locale.getVariant().length() != 0);
1323
1324        if (l) {
1325            sb.append(locale.getLanguage());
1326            if (c) {
1327                sb.append("-r").append(locale.getCountry());
1328                if (s) {
1329                    sb.append("-s").append(locale.getScript());
1330                    if (v) {
1331                        sb.append("-v").append(locale.getVariant());
1332                    }
1333                }
1334            }
1335        }
1336        return sb.toString();
1337    }
1338
1339
1340    /**
1341     * Returns a string representation of the configuration that can be parsed
1342     * by build tools (like AAPT).
1343     *
1344     *
1345     *
1346     * @hide
1347     */
1348    public static String resourceQualifierString(Configuration config) {
1349        ArrayList<String> parts = new ArrayList<String>();
1350
1351        if (config.mcc != 0) {
1352            parts.add(config.mcc + "mcc");
1353            if (config.mnc != 0) {
1354                parts.add(config.mnc + "mnc");
1355            }
1356        }
1357
1358        if (!config.locale.getLanguage().isEmpty()) {
1359            parts.add(localeToResourceQualifier(config.locale));
1360        }
1361
1362        switch (config.screenLayout & Configuration.SCREENLAYOUT_LAYOUTDIR_MASK) {
1363            case Configuration.SCREENLAYOUT_LAYOUTDIR_LTR:
1364                parts.add("ldltr");
1365                break;
1366            case Configuration.SCREENLAYOUT_LAYOUTDIR_RTL:
1367                parts.add("ldrtl");
1368                break;
1369            default:
1370                break;
1371        }
1372
1373        if (config.smallestScreenWidthDp != 0) {
1374            parts.add("sw" + config.smallestScreenWidthDp + "dp");
1375        }
1376
1377        if (config.screenWidthDp != 0) {
1378            parts.add("w" + config.screenWidthDp + "dp");
1379        }
1380
1381        if (config.screenHeightDp != 0) {
1382            parts.add("h" + config.screenHeightDp + "dp");
1383        }
1384
1385        switch (config.screenLayout & Configuration.SCREENLAYOUT_SIZE_MASK) {
1386            case Configuration.SCREENLAYOUT_SIZE_SMALL:
1387                parts.add("small");
1388                break;
1389            case Configuration.SCREENLAYOUT_SIZE_NORMAL:
1390                parts.add("normal");
1391                break;
1392            case Configuration.SCREENLAYOUT_SIZE_LARGE:
1393                parts.add("large");
1394                break;
1395            case Configuration.SCREENLAYOUT_SIZE_XLARGE:
1396                parts.add("xlarge");
1397                break;
1398            default:
1399                break;
1400        }
1401
1402        switch (config.screenLayout & Configuration.SCREENLAYOUT_LONG_MASK) {
1403            case Configuration.SCREENLAYOUT_LONG_YES:
1404                parts.add("long");
1405                break;
1406            case Configuration.SCREENLAYOUT_LONG_NO:
1407                parts.add("notlong");
1408                break;
1409            default:
1410                break;
1411        }
1412
1413        switch (config.orientation) {
1414            case Configuration.ORIENTATION_LANDSCAPE:
1415                parts.add("land");
1416                break;
1417            case Configuration.ORIENTATION_PORTRAIT:
1418                parts.add("port");
1419                break;
1420            default:
1421                break;
1422        }
1423
1424        switch (config.uiMode & Configuration.UI_MODE_TYPE_MASK) {
1425            case Configuration.UI_MODE_TYPE_APPLIANCE:
1426                parts.add("appliance");
1427                break;
1428            case Configuration.UI_MODE_TYPE_DESK:
1429                parts.add("desk");
1430                break;
1431            case Configuration.UI_MODE_TYPE_TELEVISION:
1432                parts.add("television");
1433                break;
1434            case Configuration.UI_MODE_TYPE_CAR:
1435                parts.add("car");
1436                break;
1437            case Configuration.UI_MODE_TYPE_WATCH:
1438                parts.add("watch");
1439                break;
1440            default:
1441                break;
1442        }
1443
1444        switch (config.uiMode & Configuration.UI_MODE_NIGHT_MASK) {
1445            case Configuration.UI_MODE_NIGHT_YES:
1446                parts.add("night");
1447                break;
1448            case Configuration.UI_MODE_NIGHT_NO:
1449                parts.add("notnight");
1450                break;
1451            default:
1452                break;
1453        }
1454
1455        switch (config.densityDpi) {
1456            case 0:
1457                break;
1458            case 120:
1459                parts.add("ldpi");
1460                break;
1461            case 160:
1462                parts.add("mdpi");
1463                break;
1464            case 213:
1465                parts.add("tvdpi");
1466                break;
1467            case 240:
1468                parts.add("hdpi");
1469                break;
1470            case 320:
1471                parts.add("xhdpi");
1472                break;
1473            default:
1474                parts.add(config.densityDpi + "dpi");
1475                break;
1476        }
1477
1478        switch (config.touchscreen) {
1479            case Configuration.TOUCHSCREEN_NOTOUCH:
1480                parts.add("notouch");
1481                break;
1482            case Configuration.TOUCHSCREEN_FINGER:
1483                parts.add("finger");
1484                break;
1485            default:
1486                break;
1487        }
1488
1489        switch (config.keyboardHidden) {
1490            case Configuration.KEYBOARDHIDDEN_NO:
1491                parts.add("keysexposed");
1492                break;
1493            case Configuration.KEYBOARDHIDDEN_YES:
1494                parts.add("keyshidden");
1495                break;
1496            case Configuration.KEYBOARDHIDDEN_SOFT:
1497                parts.add("keyssoft");
1498                break;
1499            default:
1500                break;
1501        }
1502
1503        switch (config.keyboard) {
1504            case Configuration.KEYBOARD_NOKEYS:
1505                parts.add("nokeys");
1506                break;
1507            case Configuration.KEYBOARD_QWERTY:
1508                parts.add("qwerty");
1509                break;
1510            case Configuration.KEYBOARD_12KEY:
1511                parts.add("12key");
1512                break;
1513            default:
1514                break;
1515        }
1516
1517        switch (config.navigationHidden) {
1518            case Configuration.NAVIGATIONHIDDEN_NO:
1519                parts.add("navexposed");
1520                break;
1521            case Configuration.NAVIGATIONHIDDEN_YES:
1522                parts.add("navhidden");
1523                break;
1524            default:
1525                break;
1526        }
1527
1528        switch (config.navigation) {
1529            case Configuration.NAVIGATION_NONAV:
1530                parts.add("nonav");
1531                break;
1532            case Configuration.NAVIGATION_DPAD:
1533                parts.add("dpad");
1534                break;
1535            case Configuration.NAVIGATION_TRACKBALL:
1536                parts.add("trackball");
1537                break;
1538            case Configuration.NAVIGATION_WHEEL:
1539                parts.add("wheel");
1540                break;
1541            default:
1542                break;
1543        }
1544
1545        parts.add("v" + Build.VERSION.SDK_INT);
1546        return TextUtils.join("-", parts);
1547    }
1548}
1549