summaryrefslogtreecommitdiffstats
path: root/src/com/android/settings/Utils.java
blob: aa958d3159d93a4067f461ae5b0cc03e1c1e6ca7 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
/**
 * Copyright (C) 2007 Google Inc.
 *
 * Licensed under the Apache License, Version 2.0 (the "License"); you may not
 * use this file except in compliance with the License. You may obtain a copy
 * of the License at
 *
 * http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
 * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
 * License for the specific language governing permissions and limitations
 * under the License.
 */

package com.android.settings;

import android.app.Activity;
import android.app.ActivityManager;
import android.app.AlertDialog;
import android.app.Dialog;
import android.content.ContentResolver;
import android.content.Context;
import android.content.DialogInterface;
import android.content.Intent;
import android.content.pm.ActivityInfo;
import android.content.pm.ApplicationInfo;
import android.content.pm.PackageManager;
import android.content.pm.PackageManager.NameNotFoundException;
import android.content.pm.ResolveInfo;
import android.content.pm.UserInfo;
import android.content.res.Configuration;
import android.content.res.Resources;
import android.content.res.Resources.NotFoundException;
import android.database.Cursor;
import android.graphics.Bitmap;
import android.graphics.BitmapFactory;
import android.graphics.drawable.Drawable;
import android.net.ConnectivityManager;
import android.net.LinkProperties;
import android.net.Uri;
import android.os.BatteryManager;
import android.os.Bundle;
import android.os.ParcelFileDescriptor;
import android.os.UserHandle;
import android.os.UserManager;
import android.preference.Preference;
import android.preference.PreferenceActivity.Header;
import android.preference.PreferenceFrameLayout;
import android.preference.PreferenceGroup;
import android.provider.ContactsContract.CommonDataKinds;
import android.provider.ContactsContract.CommonDataKinds.Phone;
import android.provider.ContactsContract.CommonDataKinds.StructuredName;
import android.provider.ContactsContract.Contacts;
import android.provider.ContactsContract.Data;
import android.provider.ContactsContract.Profile;
import android.provider.ContactsContract.RawContacts;
import android.telephony.TelephonyManager;
import android.text.TextUtils;
import android.util.DisplayMetrics;
import android.util.Log;
import android.view.DisplayInfo;
import android.view.Surface;
import android.view.View;
import android.view.ViewGroup;
import android.view.WindowManager;
import android.widget.ListView;
import android.widget.TabWidget;

import com.android.settings.users.ProfileUpdateReceiver;

import java.io.BufferedReader;
import java.io.File;
import java.io.FileReader;
import java.io.FileWriter;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.net.InetAddress;
import java.util.Iterator;
import java.util.List;
import java.util.Locale;

public class Utils {

    private static final String TAG = "Utils";

    /**
     * Set the preference's title to the matching activity's label.
     */
    public static final int UPDATE_PREFERENCE_FLAG_SET_TITLE_TO_MATCHING_ACTIVITY = 1;

    /**
     * Name of the meta-data item that should be set in the AndroidManifest.xml
     * to specify the icon that should be displayed for the preference.
     */
    private static final String META_DATA_PREFERENCE_ICON = "com.android.settings.icon";

    /**
     * Name of the meta-data item that should be set in the AndroidManifest.xml
     * to specify the title that should be displayed for the preference.
     */
    private static final String META_DATA_PREFERENCE_TITLE = "com.android.settings.title";

    /**
     * Name of the meta-data item that should be set in the AndroidManifest.xml
     * to specify the summary text that should be displayed for the preference.
     */
    private static final String META_DATA_PREFERENCE_SUMMARY = "com.android.settings.summary";

    // Device types
    private static final int DEVICE_PHONE = 0;
    private static final int DEVICE_HYBRID = 1;
    private static final int DEVICE_TABLET = 2;

    // Device type reference
    private static int mDeviceType = -1;

    /**
     * Finds a matching activity for a preference's intent. If a matching
     * activity is not found, it will remove the preference.
     *
     * @param context The context.
     * @param parentPreferenceGroup The preference group that contains the
     *            preference whose intent is being resolved.
     * @param preferenceKey The key of the preference whose intent is being
     *            resolved.
     * @param flags 0 or one or more of
     *            {@link #UPDATE_PREFERENCE_FLAG_SET_TITLE_TO_MATCHING_ACTIVITY}
     *            .
     * @return Whether an activity was found. If false, the preference was
     *         removed.
     */
    public static boolean updatePreferenceToSpecificActivityOrRemove(Context context,
            PreferenceGroup parentPreferenceGroup, String preferenceKey, int flags) {

        Preference preference = parentPreferenceGroup.findPreference(preferenceKey);
        if (preference == null) {
            return false;
        }

        Intent intent = preference.getIntent();
        if (intent != null) {
            // Find the activity that is in the system image
            PackageManager pm = context.getPackageManager();
            List<ResolveInfo> list = pm.queryIntentActivities(intent, 0);
            int listSize = list.size();
            for (int i = 0; i < listSize; i++) {
                ResolveInfo resolveInfo = list.get(i);
                if ((resolveInfo.activityInfo.applicationInfo.flags & ApplicationInfo.FLAG_SYSTEM)
                        != 0) {

                    // Replace the intent with this specific activity
                    preference.setIntent(new Intent().setClassName(
                            resolveInfo.activityInfo.packageName,
                            resolveInfo.activityInfo.name));

                    if ((flags & UPDATE_PREFERENCE_FLAG_SET_TITLE_TO_MATCHING_ACTIVITY) != 0) {
                        // Set the preference title to the activity's label
                        preference.setTitle(resolveInfo.loadLabel(pm));
                    }

                    return true;
                }
            }
        }

        // Did not find a matching activity, so remove the preference
        parentPreferenceGroup.removePreference(preference);

        return false;
    }

    /**
     * Finds a matching activity for a preference's intent. If a matching
     * activity is not found, it will remove the preference. The icon, title and
     * summary of the preference will also be updated with the values retrieved
     * from the activity's meta-data elements. If no meta-data elements are
     * specified then the preference title will be set to match the label of the
     * activity, an icon and summary text will not be displayed.
     *
     * @param context The context.
     * @param parentPreferenceGroup The preference group that contains the
     *            preference whose intent is being resolved.
     * @param preferenceKey The key of the preference whose intent is being
     *            resolved.
     *
     * @return Whether an activity was found. If false, the preference was
     *         removed.
     *
     * @see {@link #META_DATA_PREFERENCE_ICON}
     *      {@link #META_DATA_PREFERENCE_TITLE}
     *      {@link #META_DATA_PREFERENCE_SUMMARY}
     */
    public static boolean updatePreferenceToSpecificActivityFromMetaDataOrRemove(Context context,
            PreferenceGroup parentPreferenceGroup, String preferenceKey) {

        IconPreferenceScreen preference = (IconPreferenceScreen)parentPreferenceGroup
                .findPreference(preferenceKey);
        if (preference == null) {
            return false;
        }

        Intent intent = preference.getIntent();
        if (intent != null) {
            // Find the activity that is in the system image
            PackageManager pm = context.getPackageManager();
            List<ResolveInfo> list = pm.queryIntentActivities(intent, PackageManager.GET_META_DATA);
            int listSize = list.size();
            for (int i = 0; i < listSize; i++) {
                ResolveInfo resolveInfo = list.get(i);
                if ((resolveInfo.activityInfo.applicationInfo.flags
                        & ApplicationInfo.FLAG_SYSTEM) != 0) {
                    Drawable icon = null;
                    String title = null;
                    String summary = null;

                    // Get the activity's meta-data
                    try {
                        Resources res = pm
                                .getResourcesForApplication(resolveInfo.activityInfo.packageName);
                        Bundle metaData = resolveInfo.activityInfo.metaData;

                        if (res != null && metaData != null) {
                            icon = res.getDrawable(metaData.getInt(META_DATA_PREFERENCE_ICON));
                            title = res.getString(metaData.getInt(META_DATA_PREFERENCE_TITLE));
                            summary = res.getString(metaData.getInt(META_DATA_PREFERENCE_SUMMARY));
                        }
                    } catch (NameNotFoundException e) {
                        // Ignore
                    } catch (NotFoundException e) {
                        // Ignore
                    }

                    // Set the preference title to the activity's label if no
                    // meta-data is found
                    if (TextUtils.isEmpty(title)) {
                        title = resolveInfo.loadLabel(pm).toString();
                    }

                    // Set icon, title and summary for the preference
                    preference.setIcon(icon);
                    preference.setTitle(title);
                    preference.setSummary(summary);

                    // Replace the intent with this specific activity
                    preference.setIntent(new Intent().setClassName(
                            resolveInfo.activityInfo.packageName,
                            resolveInfo.activityInfo.name));

                   return true;
                }
            }
        }

        // Did not find a matching activity, so remove the preference
        parentPreferenceGroup.removePreference(preference);

        return false;
    }

    public static boolean updateHeaderToSpecificActivityFromMetaDataOrRemove(Context context,
            List<Header> target, Header header) {

        Intent intent = header.intent;
        if (intent != null) {
            // Find the activity that is in the system image
            PackageManager pm = context.getPackageManager();
            List<ResolveInfo> list = pm.queryIntentActivities(intent, PackageManager.GET_META_DATA);
            int listSize = list.size();
            for (int i = 0; i < listSize; i++) {
                ResolveInfo resolveInfo = list.get(i);
                if ((resolveInfo.activityInfo.applicationInfo.flags & ApplicationInfo.FLAG_SYSTEM)
                        != 0) {
                    Drawable icon = null;
                    String title = null;
                    String summary = null;

                    // Get the activity's meta-data
                    try {
                        Resources res = pm.getResourcesForApplication(
                                resolveInfo.activityInfo.packageName);
                        Bundle metaData = resolveInfo.activityInfo.metaData;

                        if (res != null && metaData != null) {
                            icon = res.getDrawable(metaData.getInt(META_DATA_PREFERENCE_ICON));
                            title = res.getString(metaData.getInt(META_DATA_PREFERENCE_TITLE));
                            summary = res.getString(metaData.getInt(META_DATA_PREFERENCE_SUMMARY));
                        }
                    } catch (NameNotFoundException e) {
                        // Ignore
                    } catch (NotFoundException e) {
                        // Ignore
                    }

                    // Set the preference title to the activity's label if no
                    // meta-data is found
                    if (TextUtils.isEmpty(title)) {
                        title = resolveInfo.loadLabel(pm).toString();
                    }

                    // Set icon, title and summary for the preference
                    // TODO:
                    //header.icon = icon;
                    header.title = title;
                    header.summary = summary;
                    // Replace the intent with this specific activity
                    header.intent = new Intent().setClassName(resolveInfo.activityInfo.packageName,
                            resolveInfo.activityInfo.name);

                    return true;
                }
            }
        }

        // Did not find a matching activity, so remove the preference
        target.remove(header);

        return false;
    }

    /**
     * Returns true if Monkey is running.
     */
    public static boolean isMonkeyRunning() {
        return ActivityManager.isUserAMonkey();
    }

    /**
     * Returns whether the device is voice-capable (meaning, it is also a phone).
     */
    public static boolean isVoiceCapable(Context context) {
        TelephonyManager telephony =
                (TelephonyManager) context.getSystemService(Context.TELEPHONY_SERVICE);
        return telephony != null && telephony.isVoiceCapable();
    }

    public static boolean isWifiOnly(Context context) {
        ConnectivityManager cm = (ConnectivityManager)context.getSystemService(
                Context.CONNECTIVITY_SERVICE);
        return (cm.isNetworkSupported(ConnectivityManager.TYPE_MOBILE) == false);
    }

    /**
     * Returns the WIFI IP Addresses, if any, taking into account IPv4 and IPv6 style addresses.
     * @param context the application context
     * @return the formatted and comma-separated IP addresses, or null if none.
     */
    public static String getWifiIpAddresses(Context context) {
        ConnectivityManager cm = (ConnectivityManager)
                context.getSystemService(Context.CONNECTIVITY_SERVICE);
        LinkProperties prop = cm.getLinkProperties(ConnectivityManager.TYPE_WIFI);
        return formatIpAddresses(prop);
    }

    /**
     * Returns the default link's IP addresses, if any, taking into account IPv4 and IPv6 style
     * addresses.
     * @param context the application context
     * @return the formatted and comma-separated IP addresses, or null if none.
     */
    public static String getDefaultIpAddresses(Context context) {
        ConnectivityManager cm = (ConnectivityManager)
                context.getSystemService(Context.CONNECTIVITY_SERVICE);
        LinkProperties prop = cm.getActiveLinkProperties();
        return formatIpAddresses(prop);
    }

    private static String formatIpAddresses(LinkProperties prop) {
        if (prop == null) return null;
        Iterator<InetAddress> iter = prop.getAddresses().iterator();
        // If there are no entries, return null
        if (!iter.hasNext()) return null;
        // Concatenate all available addresses, comma separated
        String addresses = "";
        while (iter.hasNext()) {
            addresses += iter.next().getHostAddress();
            if (iter.hasNext()) addresses += ", ";
        }
        return addresses;
    }

    public static Locale createLocaleFromString(String localeStr) {
        // TODO: is there a better way to actually construct a locale that will match?
        // The main problem is, on top of Java specs, locale.toString() and
        // new Locale(locale.toString()).toString() do not return equal() strings in
        // many cases, because the constructor takes the only string as the language
        // code. So : new Locale("en", "US").toString() => "en_US"
        // And : new Locale("en_US").toString() => "en_us"
        if (null == localeStr)
            return Locale.getDefault();
        String[] brokenDownLocale = localeStr.split("_", 3);
        // split may not return a 0-length array.
        if (1 == brokenDownLocale.length) {
            return new Locale(brokenDownLocale[0]);
        } else if (2 == brokenDownLocale.length) {
            return new Locale(brokenDownLocale[0], brokenDownLocale[1]);
        } else {
            return new Locale(brokenDownLocale[0], brokenDownLocale[1], brokenDownLocale[2]);
        }
    }

    public static String getBatteryPercentage(Intent batteryChangedIntent) {
        int level = batteryChangedIntent.getIntExtra("level", 0);
        int scale = batteryChangedIntent.getIntExtra("scale", 100);
        return String.valueOf(level * 100 / scale) + "%";
    }

    public static String getBatteryStatus(Resources res, Intent batteryChangedIntent) {
        final Intent intent = batteryChangedIntent;

        int plugType = intent.getIntExtra("plugged", 0);
        int status = intent.getIntExtra("status", BatteryManager.BATTERY_STATUS_UNKNOWN);
        String statusString;
        if (status == BatteryManager.BATTERY_STATUS_CHARGING) {
            statusString = res.getString(R.string.battery_info_status_charging);
            if (plugType > 0) {
                int resId;
                if (plugType == BatteryManager.BATTERY_PLUGGED_AC) {
                    resId = R.string.battery_info_status_charging_ac;
                } else if (plugType == BatteryManager.BATTERY_PLUGGED_USB) {
                    resId = R.string.battery_info_status_charging_usb;
                } else {
                    resId = R.string.battery_info_status_charging_wireless;
                }
                statusString = statusString + " " + res.getString(resId);
            }
        } else if (status == BatteryManager.BATTERY_STATUS_DISCHARGING) {
            statusString = res.getString(R.string.battery_info_status_discharging);
        } else if (status == BatteryManager.BATTERY_STATUS_NOT_CHARGING) {
            statusString = res.getString(R.string.battery_info_status_not_charging);
        } else if (status == BatteryManager.BATTERY_STATUS_FULL) {
            statusString = res.getString(R.string.battery_info_status_full);
        } else {
            statusString = res.getString(R.string.battery_info_status_unknown);
        }

        return statusString;
    }

    public static void forcePrepareCustomPreferencesList(
            ViewGroup parent, View child, ListView list, boolean ignoreSidePadding) {
        list.setScrollBarStyle(View.SCROLLBARS_OUTSIDE_OVERLAY);
        list.setClipToPadding(false);
        prepareCustomPreferencesList(parent, child, list, ignoreSidePadding);
    }

    /**
     * Prepare a custom preferences layout, moving padding to {@link ListView}
     * when outside scrollbars are requested. Usually used to display
     * {@link ListView} and {@link TabWidget} with correct padding.
     */
    public static void prepareCustomPreferencesList(
            ViewGroup parent, View child, View list, boolean ignoreSidePadding) {
        final boolean movePadding = list.getScrollBarStyle() == View.SCROLLBARS_OUTSIDE_OVERLAY;
        if (movePadding && parent instanceof PreferenceFrameLayout) {
            ((PreferenceFrameLayout.LayoutParams) child.getLayoutParams()).removeBorders = true;

            final Resources res = list.getResources();
            final int paddingSide = res.getDimensionPixelSize(
                    com.android.internal.R.dimen.preference_fragment_padding_side);
            final int paddingBottom = res.getDimensionPixelSize(
                    com.android.internal.R.dimen.preference_fragment_padding_bottom);

            final int effectivePaddingSide = ignoreSidePadding ? 0 : paddingSide;
            list.setPadding(effectivePaddingSide, 0, effectivePaddingSide, paddingBottom);
        }
    }

    /**
     * Return string resource that best describes combination of tethering
     * options available on this device.
     */
    public static int getTetheringLabel(ConnectivityManager cm) {
        String[] usbRegexs = cm.getTetherableUsbRegexs();
        String[] wifiRegexs = cm.getTetherableWifiRegexs();
        String[] bluetoothRegexs = cm.getTetherableBluetoothRegexs();

        boolean usbAvailable = usbRegexs.length != 0;
        boolean wifiAvailable = wifiRegexs.length != 0;
        boolean bluetoothAvailable = bluetoothRegexs.length != 0;

        if (wifiAvailable && usbAvailable && bluetoothAvailable) {
            return R.string.tether_settings_title_all;
        } else if (wifiAvailable && usbAvailable) {
            return R.string.tether_settings_title_all;
        } else if (wifiAvailable && bluetoothAvailable) {
            return R.string.tether_settings_title_all;
        } else if (wifiAvailable) {
            return R.string.tether_settings_title_wifi;
        } else if (usbAvailable && bluetoothAvailable) {
            return R.string.tether_settings_title_usb_bluetooth;
        } else if (usbAvailable) {
            return R.string.tether_settings_title_usb;
        } else {
            return R.string.tether_settings_title_bluetooth;
        }
    }

    public static boolean fileExists(String filename) {
        return new File(filename).exists();
    }

    public static String fileReadOneLine(String fname) {
        BufferedReader br;
        String line = null;

        try {
            br = new BufferedReader(new FileReader(fname), 512);
            try {
                line = br.readLine();
            } finally {
                br.close();
            }
        } catch (Exception e) {
            Log.e(TAG, "IO Exception when reading /sys/ file", e);
        }
        return line;
    }

    public static boolean fileWriteOneLine(String fname, String value) {
        try {
            FileWriter fw = new FileWriter(fname);
            try {
                fw.write(value);
            } finally {
                fw.close();
            }
        } catch (IOException e) {
            String Error = "Error writing to " + fname + ". Exception: ";
            Log.e(TAG, Error, e);
            return false;
        }
        return true;
    }

    /* Used by UserSettings as well. Call this on a non-ui thread. */
    public static boolean copyMeProfilePhoto(Context context, UserInfo user) {
        Uri contactUri = Profile.CONTENT_URI;

        InputStream avatarDataStream = Contacts.openContactPhotoInputStream(
                    context.getContentResolver(),
                    contactUri, true);
        // If there's no profile photo, assign a default avatar
        if (avatarDataStream == null) {
            return false;
        }
        int userId = user != null ? user.id : UserHandle.myUserId();
        UserManager um = (UserManager) context.getSystemService(Context.USER_SERVICE);
        Bitmap icon = BitmapFactory.decodeStream(avatarDataStream);
        um.setUserIcon(userId, icon);
        try {
            avatarDataStream.close();
        } catch (IOException ioe) { }
        return true;
    }

    public static String getMeProfileName(Context context, boolean full) {
        if (full) {
            return getProfileDisplayName(context);
        } else {
            return getShorterNameIfPossible(context);
        }
    }

    private static String getShorterNameIfPossible(Context context) {
        final String given = getLocalProfileGivenName(context);
        return !TextUtils.isEmpty(given) ? given : getProfileDisplayName(context);
    }

    private static String getLocalProfileGivenName(Context context) {
        final ContentResolver cr = context.getContentResolver();

        // Find the raw contact ID for the local ME profile raw contact.
        final long localRowProfileId;
        final Cursor localRawProfile = cr.query(
                Profile.CONTENT_RAW_CONTACTS_URI,
                new String[] {RawContacts._ID},
                RawContacts.ACCOUNT_TYPE + " IS NULL AND " +
                        RawContacts.ACCOUNT_NAME + " IS NULL",
                null, null);
        if (localRawProfile == null) return null;

        try {
            if (!localRawProfile.moveToFirst()) {
                return null;
            }
            localRowProfileId = localRawProfile.getLong(0);
        } finally {
            localRawProfile.close();
        }

        // Find the structured name for the raw contact.
        final Cursor structuredName = cr.query(
                Profile.CONTENT_URI.buildUpon().appendPath(Contacts.Data.CONTENT_DIRECTORY).build(),
                new String[] {CommonDataKinds.StructuredName.GIVEN_NAME,
                    CommonDataKinds.StructuredName.FAMILY_NAME},
                Data.RAW_CONTACT_ID + "=" + localRowProfileId,
                null, null);
        if (structuredName == null) return null;

        try {
            if (!structuredName.moveToFirst()) {
                return null;
            }
            String partialName = structuredName.getString(0);
            if (TextUtils.isEmpty(partialName)) {
                partialName = structuredName.getString(1);
            }
            return partialName;
        } finally {
            structuredName.close();
        }
    }

    private static final String getProfileDisplayName(Context context) {
        final ContentResolver cr = context.getContentResolver();
        final Cursor profile = cr.query(Profile.CONTENT_URI,
                new String[] {Profile.DISPLAY_NAME}, null, null, null);
        if (profile == null) return null;

        try {
            if (!profile.moveToFirst()) {
                return null;
            }
            return profile.getString(0);
        } finally {
            profile.close();
        }
    }

    /** Not global warming, it's global change warning. */
    public static Dialog buildGlobalChangeWarningDialog(final Context context, int titleResId,
            final Runnable positiveAction) {
        final AlertDialog.Builder builder = new AlertDialog.Builder(context);
        builder.setTitle(titleResId);
        builder.setMessage(R.string.global_change_warning);
        builder.setPositiveButton(android.R.string.ok, new DialogInterface.OnClickListener() {
            @Override
            public void onClick(DialogInterface dialog, int which) {
                positiveAction.run();
            }
        });
        builder.setNegativeButton(android.R.string.cancel, null);

        return builder.create();
    }

    public static boolean hasMultipleUsers(Context context) {
        return ((UserManager) context.getSystemService(Context.USER_SERVICE))
                .getUsers().size() > 1;
    }

    private static int getScreenType(Context con) {
        if (mDeviceType == -1) {
            WindowManager wm = (WindowManager)con.getSystemService(Context.WINDOW_SERVICE);
            DisplayInfo outDisplayInfo = new DisplayInfo();
            wm.getDefaultDisplay().getDisplayInfo(outDisplayInfo);
            int shortSize = Math.min(outDisplayInfo.logicalHeight, outDisplayInfo.logicalWidth);
            int shortSizeDp = shortSize * DisplayMetrics.DENSITY_DEFAULT / outDisplayInfo.logicalDensityDpi;
            if (shortSizeDp < 600) {
                // 0-599dp: "phone" UI with a separate status & navigation bar
                mDeviceType =  DEVICE_PHONE;
            } else if (shortSizeDp < 720) {
                // 600-719dp: "phone" UI with modifications for larger screens
                mDeviceType = DEVICE_HYBRID;
            } else {
                // 720dp: "tablet" UI with a single combined status & navigation bar
                mDeviceType = DEVICE_TABLET;
            }
        }
        return mDeviceType;
    }

    public static boolean isPhone(Context con) {
        return getScreenType(con) == DEVICE_PHONE;
    }

    public static boolean isHybrid(Context con) {
        return getScreenType(con) == DEVICE_HYBRID;
    }

    public static boolean isTablet(Context con) {
        return getScreenType(con) == DEVICE_TABLET;
    }

    /* returns whether the device has volume rocker or not. */
    public static boolean hasVolumeRocker(Context con) {
        return con.getResources().getBoolean(R.bool.has_volume_rocker);
    }

    /**
     * Locks the activity orientation to the current device orientation
     * @param act
     */
    public static void lockCurrentOrientation(Activity act) {
        int currentRotation = act.getWindowManager().getDefaultDisplay().getRotation();
        int frozenRotation = 0;
        int orientation = act.getResources().getConfiguration().orientation;
        switch(currentRotation) {
            case Surface.ROTATION_0:
                frozenRotation = orientation == Configuration.ORIENTATION_LANDSCAPE
                    ? ActivityInfo.SCREEN_ORIENTATION_LANDSCAPE : ActivityInfo.SCREEN_ORIENTATION_PORTRAIT;
                break;
            case Surface.ROTATION_90:
                frozenRotation = orientation == Configuration.ORIENTATION_PORTRAIT
                    ? ActivityInfo.SCREEN_ORIENTATION_REVERSE_PORTRAIT : ActivityInfo.SCREEN_ORIENTATION_LANDSCAPE;
                break;
            case Surface.ROTATION_180:
                frozenRotation = orientation == Configuration.ORIENTATION_LANDSCAPE
                    ? ActivityInfo.SCREEN_ORIENTATION_REVERSE_LANDSCAPE : ActivityInfo.SCREEN_ORIENTATION_REVERSE_PORTRAIT;
                break;
            case Surface.ROTATION_270:
                frozenRotation = orientation == Configuration.ORIENTATION_PORTRAIT
                    ? ActivityInfo.SCREEN_ORIENTATION_PORTRAIT : ActivityInfo.SCREEN_ORIENTATION_REVERSE_LANDSCAPE;
                break;
        }
        act.setRequestedOrientation(frozenRotation);
    }
}