summaryrefslogtreecommitdiffstats
path: root/src/com/android/settings/notification/ZenModeSettings.java
blob: 053d2ef12ce7576ebe93dec814ebd363036795ef (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
/*
 * Copyright (C) 2014 The Android Open Source Project
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package com.android.settings.notification;

import static com.android.settings.notification.ZenModeDowntimeDaysSelection.DAYS;

import android.app.AlertDialog;
import android.app.Dialog;
import android.app.DialogFragment;
import android.app.FragmentManager;
import android.app.INotificationManager;
import android.app.NotificationManager;
import android.app.TimePickerDialog;
import android.content.Context;
import android.content.DialogInterface;
import android.content.DialogInterface.OnDismissListener;
import android.content.pm.PackageManager;
import android.content.res.Resources;
import android.os.Bundle;
import android.os.ServiceManager;
import android.preference.Preference;
import android.preference.Preference.OnPreferenceClickListener;
import android.preference.PreferenceCategory;
import android.preference.PreferenceScreen;
import android.provider.Settings.Global;
import android.service.notification.Condition;
import android.service.notification.ZenModeConfig;
import android.text.format.DateFormat;
import android.util.Log;
import android.util.SparseArray;
import android.widget.ScrollView;
import android.widget.TimePicker;

import com.android.internal.logging.MetricsLogger;
import com.android.settings.DropDownPreference;
import com.android.settings.R;
import com.android.settings.SettingsPreferenceFragment;
import com.android.settings.search.BaseSearchIndexProvider;
import com.android.settings.search.Indexable;
import com.android.settings.search.SearchIndexableRaw;

import java.text.SimpleDateFormat;
import java.util.ArrayList;
import java.util.Calendar;
import java.util.List;
import java.util.Objects;

public class ZenModeSettings extends ZenModeSettingsBase implements Indexable {
    private static final String KEY_ZEN_MODE = "zen_mode";
    private static final String KEY_PRIORITY_SETTINGS = "priority_settings";
    private static final String KEY_DOWNTIME = "downtime";
    private static final String KEY_DAYS = "days";
    private static final String KEY_START_TIME = "start_time";
    private static final String KEY_END_TIME = "end_time";
    private static final String KEY_DOWNTIME_MODE = "downtime_mode";

    private static final String KEY_AUTOMATION = "automation";
    private static final String KEY_ENTRY = "entry";
    private static final String KEY_CONDITION_PROVIDERS = "manage_condition_providers";

    private static final SettingPrefWithCallback PREF_ZEN_MODE = new SettingPrefWithCallback(
            SettingPref.TYPE_GLOBAL, KEY_ZEN_MODE, Global.ZEN_MODE, Global.ZEN_MODE_OFF,
            Global.ZEN_MODE_OFF, Global.ZEN_MODE_IMPORTANT_INTERRUPTIONS, Global.ZEN_MODE_ALARMS,
            Global.ZEN_MODE_NO_INTERRUPTIONS) {
        protected String getCaption(Resources res, int value) {
            switch (value) {
                case Global.ZEN_MODE_NO_INTERRUPTIONS:
                    return res.getString(R.string.zen_mode_option_no_interruptions);
                case Global.ZEN_MODE_ALARMS:
                    return res.getString(R.string.zen_mode_option_alarms);
                case Global.ZEN_MODE_IMPORTANT_INTERRUPTIONS:
                    return res.getString(R.string.zen_mode_option_important_interruptions);
                default:
                    return res.getString(R.string.zen_mode_option_off);
            }
        }
    };

    private static final SimpleDateFormat DAY_FORMAT = new SimpleDateFormat("EEE");

    private static SparseArray<String> allKeyTitles(Context context) {
        final SparseArray<String> rt = new SparseArray<String>();
        rt.put(R.string.zen_mode_option_title, KEY_ZEN_MODE);
        rt.put(R.string.zen_mode_priority_settings_title, KEY_PRIORITY_SETTINGS);
        rt.put(R.string.zen_mode_downtime_category, KEY_DOWNTIME);
        rt.put(R.string.zen_mode_downtime_days, KEY_DAYS);
        rt.put(R.string.zen_mode_start_time, KEY_START_TIME);
        rt.put(R.string.zen_mode_end_time, KEY_END_TIME);
        rt.put(R.string.zen_mode_downtime_mode_title, KEY_DOWNTIME_MODE);
        rt.put(R.string.zen_mode_automation_category, KEY_AUTOMATION);
        rt.put(R.string.manage_condition_providers, KEY_CONDITION_PROVIDERS);
        return rt;
    }

    private PackageManager mPM;
    private boolean mDisableListeners;
    private boolean mDowntimeSupported;
    private Preference mPrioritySettings;
    private Preference mDays;
    private TimePickerPreference mStart;
    private TimePickerPreference mEnd;
    private DropDownPreference mDowntimeMode;
    private PreferenceCategory mAutomationCategory;
    private Preference mEntry;
    private Preference mConditionProviders;
    private AlertDialog mDialog;

    @Override
    protected int getMetricsCategory() {
        return MetricsLogger.NOTIFICATION_ZEN_MODE;
    }

    @Override
    protected void onZenModeChanged() {
        PREF_ZEN_MODE.update(mContext);
    }

    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        mPM = mContext.getPackageManager();

        addPreferencesFromResource(R.xml.zen_mode_settings);
        final PreferenceScreen root = getPreferenceScreen();

        PREF_ZEN_MODE.init(this);
        PREF_ZEN_MODE.setCallback(new SettingPrefWithCallback.Callback() {
            @Override
            public void onSettingSelected(int value) {
                if (value != Global.ZEN_MODE_OFF) {
                    showConditionSelection(value);
                }
            }
        });

        mPrioritySettings = root.findPreference(KEY_PRIORITY_SETTINGS);

        final PreferenceCategory downtime = (PreferenceCategory) root.findPreference(KEY_DOWNTIME);
        mDowntimeSupported = isDowntimeSupported(mContext);
        if (!mDowntimeSupported) {
            removePreference(KEY_DOWNTIME);
        } else {
            mDays = downtime.findPreference(KEY_DAYS);
            mDays.setOnPreferenceClickListener(new OnPreferenceClickListener() {
                @Override
                public boolean onPreferenceClick(Preference preference) {
                    new AlertDialog.Builder(mContext)
                            .setTitle(R.string.zen_mode_downtime_days)
                            .setView(new ZenModeDowntimeDaysSelection(mContext, mConfig.sleepMode) {
                                  @Override
                                  protected void onChanged(String mode) {
                                      if (mDisableListeners) return;
                                      if (Objects.equals(mode, mConfig.sleepMode)) return;
                                      if (DEBUG) Log.d(TAG, "days.onChanged sleepMode=" + mode);
                                      final ZenModeConfig newConfig = mConfig.copy();
                                      newConfig.sleepMode = mode;
                                      setZenModeConfig(newConfig);
                                  }
                            })
                            .setOnDismissListener(new OnDismissListener() {
                                @Override
                                public void onDismiss(DialogInterface dialog) {
                                    updateDays();
                                }
                            })
                            .setPositiveButton(R.string.done_button, null)
                            .show();
                    return true;
                }
            });

            final FragmentManager mgr = getFragmentManager();

            mStart = new TimePickerPreference(mContext, mgr);
            mStart.setKey(KEY_START_TIME);
            mStart.setTitle(R.string.zen_mode_start_time);
            mStart.setCallback(new TimePickerPreference.Callback() {
                @Override
                public boolean onSetTime(int hour, int minute) {
                    if (mDisableListeners) return true;
                    if (!ZenModeConfig.isValidHour(hour)) return false;
                    if (!ZenModeConfig.isValidMinute(minute)) return false;
                    if (hour == mConfig.sleepStartHour && minute == mConfig.sleepStartMinute) {
                        return true;
                    }
                    if (DEBUG) Log.d(TAG, "onPrefChange sleepStart h=" + hour + " m=" + minute);
                    final ZenModeConfig newConfig = mConfig.copy();
                    newConfig.sleepStartHour = hour;
                    newConfig.sleepStartMinute = minute;
                    return setZenModeConfig(newConfig);
                }
            });
            downtime.addPreference(mStart);
            mStart.setDependency(mDays.getKey());

            mEnd = new TimePickerPreference(mContext, mgr);
            mEnd.setKey(KEY_END_TIME);
            mEnd.setTitle(R.string.zen_mode_end_time);
            mEnd.setCallback(new TimePickerPreference.Callback() {
                @Override
                public boolean onSetTime(int hour, int minute) {
                    if (mDisableListeners) return true;
                    if (!ZenModeConfig.isValidHour(hour)) return false;
                    if (!ZenModeConfig.isValidMinute(minute)) return false;
                    if (hour == mConfig.sleepEndHour && minute == mConfig.sleepEndMinute) {
                        return true;
                    }
                    if (DEBUG) Log.d(TAG, "onPrefChange sleepEnd h=" + hour + " m=" + minute);
                    final ZenModeConfig newConfig = mConfig.copy();
                    newConfig.sleepEndHour = hour;
                    newConfig.sleepEndMinute = minute;
                    return setZenModeConfig(newConfig);
                }
            });
            downtime.addPreference(mEnd);
            mEnd.setDependency(mDays.getKey());

            mDowntimeMode = (DropDownPreference) downtime.findPreference(KEY_DOWNTIME_MODE);
            mDowntimeMode.addItem(R.string.zen_mode_downtime_mode_priority, false);
            mDowntimeMode.addItem(R.string.zen_mode_downtime_mode_none, true);
            mDowntimeMode.setCallback(new DropDownPreference.Callback() {
                @Override
                public boolean onItemSelected(int pos, Object value) {
                    if (mDisableListeners) return true;
                    final boolean sleepNone = value instanceof Boolean ? ((Boolean) value) : false;
                    if (mConfig == null || mConfig.sleepNone == sleepNone) return false;
                    final ZenModeConfig newConfig = mConfig.copy();
                    newConfig.sleepNone = sleepNone;
                    if (DEBUG) Log.d(TAG, "onPrefChange sleepNone=" + sleepNone);
                    return setZenModeConfig(newConfig);
                }
            });
            mDowntimeMode.setOrder(10);  // sort at the bottom of the category
            mDowntimeMode.setDependency(mDays.getKey());
        }

        mAutomationCategory = (PreferenceCategory) findPreference(KEY_AUTOMATION);
        mEntry = findPreference(KEY_ENTRY);
        mEntry.setOnPreferenceClickListener(new OnPreferenceClickListener() {
            @Override
            public boolean onPreferenceClick(Preference preference) {
                new AlertDialog.Builder(mContext)
                    .setTitle(R.string.zen_mode_entry_conditions_title)
                    .setView(new ZenModeAutomaticConditionSelection(mContext))
                    .setOnDismissListener(new OnDismissListener() {
                        @Override
                        public void onDismiss(DialogInterface dialog) {
                            refreshAutomationSection();
                        }
                    })
                    .setPositiveButton(R.string.dlg_ok, null)
                    .show();
                return true;
            }
        });
        mConditionProviders = findPreference(KEY_CONDITION_PROVIDERS);

        updateControls();
    }

    private void updateDays() {
        if (mConfig != null) {
            final int[] days = ZenModeConfig.tryParseDays(mConfig.sleepMode);
            if (days != null && days.length != 0) {
                final StringBuilder sb = new StringBuilder();
                final Calendar c = Calendar.getInstance();
                for (int i = 0; i < DAYS.length; i++) {
                    final int day = DAYS[i];
                    for (int j = 0; j < days.length; j++) {
                        if (day == days[j]) {
                            c.set(Calendar.DAY_OF_WEEK, day);
                            if (sb.length() > 0) {
                                sb.append(mContext.getString(R.string.summary_divider_text));
                            }
                            sb.append(DAY_FORMAT.format(c.getTime()));
                            break;
                        }
                    }
                }
                if (sb.length() > 0) {
                    mDays.setSummary(sb);
                    mDays.notifyDependencyChange(false);
                    return;
                }
            }
        }
        mDays.setSummary(R.string.zen_mode_downtime_days_none);
        mDays.notifyDependencyChange(true);
    }

    private void updateEndSummary() {
        if (!mDowntimeSupported) return;
        final int startMin = 60 * mConfig.sleepStartHour + mConfig.sleepStartMinute;
        final int endMin = 60 * mConfig.sleepEndHour + mConfig.sleepEndMinute;
        final boolean nextDay = startMin >= endMin;
        final int summaryFormat;
        if (mConfig.sleepNone) {
            summaryFormat = nextDay ? R.string.zen_mode_end_time_none_next_day_summary_format
                    : R.string.zen_mode_end_time_none_same_day_summary_format;
        } else {
            summaryFormat = nextDay ? R.string.zen_mode_end_time_priority_next_day_summary_format
                    : 0;
        }
        mEnd.setSummaryFormat(summaryFormat);
    }

    @Override
    protected void updateControls() {
        mDisableListeners = true;
        if (mDowntimeSupported) {
            updateDays();
            mStart.setTime(mConfig.sleepStartHour, mConfig.sleepStartMinute);
            mEnd.setTime(mConfig.sleepEndHour, mConfig.sleepEndMinute);
            mDowntimeMode.setSelectedValue(mConfig.sleepNone);
        }
        mDisableListeners = false;
        refreshAutomationSection();
        updateEndSummary();
        updatePrioritySettingsSummary();
    }

    private void updatePrioritySettingsSummary() {
        String s = getResources().getString(R.string.zen_mode_alarms);
        s = appendLowercase(s, mConfig.allowReminders, R.string.zen_mode_reminders);
        s = appendLowercase(s, mConfig.allowEvents, R.string.zen_mode_events);
        s = appendLowercase(s, mConfig.allowCalls, R.string.zen_mode_calls);
        s = appendLowercase(s, mConfig.allowMessages, R.string.zen_mode_messages);
        mPrioritySettings.setSummary(s);
    }

    private String appendLowercase(String s, boolean condition, int resId) {
        if (condition) {
            return getResources().getString(R.string.join_many_items_middle, s,
                    getResources().getString(resId).toLowerCase());
        }
        return s;
    }

    private void refreshAutomationSection() {
        if (mConditionProviders != null) {
            final int total = ConditionProviderSettings.getProviderCount(mPM);
            if (total == 0) {
                getPreferenceScreen().removePreference(mAutomationCategory);
            } else {
                final int n = ConditionProviderSettings.getEnabledProviderCount(mContext);
                if (n == 0) {
                    mConditionProviders.setSummary(getResources().getString(
                            R.string.manage_condition_providers_summary_zero));
                } else {
                    mConditionProviders.setSummary(String.format(getResources().getQuantityString(
                            R.plurals.manage_condition_providers_summary_nonzero,
                            n, n)));
                }
                final String entrySummary = getEntryConditionSummary();
                if (n == 0 || entrySummary == null) {
                    mEntry.setSummary(R.string.zen_mode_entry_conditions_summary_none);
                } else {
                    mEntry.setSummary(entrySummary);
                }
            }
        }
    }

    private String getEntryConditionSummary() {
        final INotificationManager nm = INotificationManager.Stub.asInterface(
                ServiceManager.getService(Context.NOTIFICATION_SERVICE));
        try {
            final Condition[] automatic = nm.getAutomaticZenModeConditions();
            if (automatic == null || automatic.length == 0) {
                return null;
            }
            final String divider = getString(R.string.summary_divider_text);
            final StringBuilder sb = new StringBuilder();
            for (int i = 0; i < automatic.length; i++) {
                if (i > 0) sb.append(divider);
                sb.append(automatic[i].summary);
            }
            return sb.toString();
        } catch (Exception e) {
            Log.w(TAG, "Error calling getAutomaticZenModeConditions", e);
            return null;
        }
    }

    protected void putZenModeSetting(int value) {
        Global.putInt(getContentResolver(), Global.ZEN_MODE, value);
    }

    protected void showConditionSelection(final int newSettingsValue) {
        if (mDialog != null) return;

        final ZenModeConditionSelection zenModeConditionSelection =
                new ZenModeConditionSelection(mContext);
        DialogInterface.OnClickListener positiveListener = new DialogInterface.OnClickListener() {
            @Override
            public void onClick(DialogInterface dialog, int which) {
                zenModeConditionSelection.confirmCondition();
                mDialog = null;
            }
        };
        final int oldSettingsValue = PREF_ZEN_MODE.getValue(mContext);
        ScrollView scrollView = new ScrollView(mContext);
        scrollView.addView(zenModeConditionSelection);
        mDialog = new AlertDialog.Builder(getActivity())
                .setTitle(PREF_ZEN_MODE.getCaption(getResources(), newSettingsValue))
                .setView(scrollView)
                .setPositiveButton(R.string.okay, positiveListener)
                .setNegativeButton(R.string.cancel_all_caps, new DialogInterface.OnClickListener() {
                    @Override
                    public void onClick(DialogInterface dialog, int which) {
                        cancelDialog(oldSettingsValue);
                    }
                })
                .setOnCancelListener(new DialogInterface.OnCancelListener() {
                    @Override
                    public void onCancel(DialogInterface dialog) {
                        cancelDialog(oldSettingsValue);
                    }
                }).create();
        mDialog.show();
    }

    protected void cancelDialog(int oldSettingsValue) {
        // If not making a decision, reset drop down to current setting.
        PREF_ZEN_MODE.setValueWithoutCallback(mContext, oldSettingsValue);
        mDialog = null;
    }

    private static boolean isDowntimeSupported(Context context) {
        return NotificationManager.from(context)
                .isSystemConditionProviderEnabled(ZenModeConfig.DOWNTIME_PATH);
    }

    // Enable indexing of searchable data
    public static final Indexable.SearchIndexProvider SEARCH_INDEX_DATA_PROVIDER =
        new BaseSearchIndexProvider() {

            @Override
            public List<SearchIndexableRaw> getRawDataToIndex(Context context, boolean enabled) {
                final SparseArray<String> keyTitles = allKeyTitles(context);
                final int N = keyTitles.size();
                final List<SearchIndexableRaw> result = new ArrayList<SearchIndexableRaw>(N);
                final Resources res = context.getResources();
                for (int i = 0; i < N; i++) {
                    final SearchIndexableRaw data = new SearchIndexableRaw(context);
                    data.key = keyTitles.valueAt(i);
                    data.title = res.getString(keyTitles.keyAt(i));
                    data.screenTitle = res.getString(R.string.zen_mode_settings_title);
                    result.add(data);
                }
                return result;
            }

            @Override
            public List<String> getNonIndexableKeys(Context context) {
                final ArrayList<String> rt = new ArrayList<String>();
                if (!isDowntimeSupported(context)) {
                    rt.add(KEY_DOWNTIME);
                    rt.add(KEY_DAYS);
                    rt.add(KEY_START_TIME);
                    rt.add(KEY_END_TIME);
                    rt.add(KEY_DOWNTIME_MODE);
                }
                return rt;
            }
        };

    private static class SettingPrefWithCallback extends SettingPref {

        private Callback mCallback;
        private int mValue;

        public SettingPrefWithCallback(int type, String key, String setting, int def,
                int... values) {
            super(type, key, setting, def, values);
        }

        public void setCallback(Callback callback) {
            mCallback = callback;
        }

        @Override
        public void update(Context context) {
            // Avoid callbacks from non-user changes.
            mValue = getValue(context);
            super.update(context);
        }

        @Override
        protected boolean setSetting(Context context, int value) {
            if (value == mValue) return true;
            mValue = value;
            if (mCallback != null) {
                mCallback.onSettingSelected(value);
            }
            return super.setSetting(context, value);
        }

        @Override
        public Preference init(SettingsPreferenceFragment settings) {
            Preference ret = super.init(settings);
            mValue = getValue(settings.getActivity());

            return ret;
        }

        public boolean setValueWithoutCallback(Context context, int value) {
            // Set the current value ahead of time, this way we won't trigger a callback.
            mValue = value;
            return putInt(mType, context.getContentResolver(), mSetting, value);
        }

        public int getValue(Context context) {
            return getInt(mType, context.getContentResolver(), mSetting, mDefault);
        }

        public interface Callback {
            void onSettingSelected(int value);
        }
    }

    private static class TimePickerPreference extends Preference {
        private final Context mContext;

        private int mSummaryFormat;
        private int mHourOfDay;
        private int mMinute;
        private Callback mCallback;

        public TimePickerPreference(Context context, final FragmentManager mgr) {
            super(context);
            mContext = context;
            setPersistent(false);
            setOnPreferenceClickListener(new OnPreferenceClickListener(){
                @Override
                public boolean onPreferenceClick(Preference preference) {
                    final TimePickerFragment frag = new TimePickerFragment();
                    frag.pref = TimePickerPreference.this;
                    frag.show(mgr, TimePickerPreference.class.getName());
                    return true;
                }
            });
        }

        public void setCallback(Callback callback) {
            mCallback = callback;
        }

        public void setSummaryFormat(int resId) {
            mSummaryFormat = resId;
            updateSummary();
        }

        public void setTime(int hourOfDay, int minute) {
            if (mCallback != null && !mCallback.onSetTime(hourOfDay, minute)) return;
            mHourOfDay = hourOfDay;
            mMinute = minute;
            updateSummary();
        }

        private void updateSummary() {
            final Calendar c = Calendar.getInstance();
            c.set(Calendar.HOUR_OF_DAY, mHourOfDay);
            c.set(Calendar.MINUTE, mMinute);
            String time = DateFormat.getTimeFormat(mContext).format(c.getTime());
            if (mSummaryFormat != 0) {
                time = mContext.getResources().getString(mSummaryFormat, time);
            }
            setSummary(time);
        }

        public static class TimePickerFragment extends DialogFragment implements
                TimePickerDialog.OnTimeSetListener {
            public TimePickerPreference pref;

            @Override
            public Dialog onCreateDialog(Bundle savedInstanceState) {
                final boolean usePref = pref != null && pref.mHourOfDay >= 0 && pref.mMinute >= 0;
                final Calendar c = Calendar.getInstance();
                final int hour = usePref ? pref.mHourOfDay : c.get(Calendar.HOUR_OF_DAY);
                final int minute = usePref ? pref.mMinute : c.get(Calendar.MINUTE);
                return new TimePickerDialog(getActivity(), this, hour, minute,
                        DateFormat.is24HourFormat(getActivity()));
            }

            public void onTimeSet(TimePicker view, int hourOfDay, int minute) {
                if (pref != null) {
                    pref.setTime(hourOfDay, minute);
                }
            }
        }

        public interface Callback {
            boolean onSetTime(int hour, int minute);
        }
    }
}