Utils.java revision a17725e24d51b7a6f002dd5afd3270c8eeea0dbe 
1/*
2 * Copyright (C) 2006 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 com.android.calendar;
18
19import static android.provider.Calendar.EVENT_BEGIN_TIME;
20
21import android.content.Context;
22import android.content.Intent;
23import android.content.SharedPreferences;
24import android.preference.PreferenceManager;
25import android.text.format.Time;
26import android.view.animation.AlphaAnimation;
27import android.widget.ViewFlipper;
28
29import java.util.Calendar;
30
31public class Utils {
32    public static void startActivity(Context context, String className, long time) {
33        Intent intent = new Intent(Intent.ACTION_VIEW);
34
35        intent.setClassName(context, className);
36        intent.putExtra(EVENT_BEGIN_TIME, time);
37        intent.setFlags(Intent.FLAG_ACTIVITY_REORDER_TO_FRONT | Intent.FLAG_ACTIVITY_SINGLE_TOP);
38
39        context.startActivity(intent);
40    }
41
42    static String getSharedPreference(Context context, String key, String defaultValue) {
43        SharedPreferences prefs = CalendarPreferenceActivity.getSharedPreferences(context);
44        return prefs.getString(key, defaultValue);
45    }
46
47    static void setSharedPreference(Context context, String key, String value) {
48        SharedPreferences prefs = CalendarPreferenceActivity.getSharedPreferences(context);
49        SharedPreferences.Editor editor = prefs.edit();
50        editor.putString(key, value);
51        editor.commit();
52    }
53
54    static void setDefaultView(Context context, int viewId) {
55        String activityString = CalendarApplication.ACTIVITY_NAMES[viewId];
56
57        SharedPreferences prefs = CalendarPreferenceActivity.getSharedPreferences(context);
58        SharedPreferences.Editor editor = prefs.edit();
59        if (viewId == CalendarApplication.AGENDA_VIEW_ID ||
60                viewId == CalendarApplication.DAY_VIEW_ID) {
61            // Record the (new) detail start view only for Agenda and Day
62            editor.putString(CalendarPreferenceActivity.KEY_DETAILED_VIEW, activityString);
63        }
64
65        // Record the (new) start view
66        editor.putString(CalendarPreferenceActivity.KEY_START_VIEW, activityString);
67        editor.commit();
68    }
69
70    public static final Time timeFromIntent(Intent intent) {
71        Time time = new Time();
72        time.set(timeFromIntentInMillis(intent));
73        return time;
74    }
75
76    /**
77     * If the given intent specifies a time (in milliseconds since the epoch),
78     * then that time is returned. Otherwise, the current time is returned.
79     */
80    public static final long timeFromIntentInMillis(Intent intent) {
81        // If the time was specified, then use that.  Otherwise, use the current time.
82        long millis = intent.getLongExtra(EVENT_BEGIN_TIME, -1);
83        if (millis == -1) {
84            millis = System.currentTimeMillis();
85        }
86        return millis;
87    }
88
89    public static final void applyAlphaAnimation(ViewFlipper v) {
90        AlphaAnimation in = new AlphaAnimation(0.0f, 1.0f);
91
92        in.setStartOffset(0);
93        in.setDuration(500);
94
95        AlphaAnimation out = new AlphaAnimation(1.0f, 0.0f);
96
97        out.setStartOffset(0);
98        out.setDuration(500);
99
100        v.setInAnimation(in);
101        v.setOutAnimation(out);
102    }
103
104    /**
105     * Formats the given Time object so that it gives the month and year
106     * (for example, "September 2007").
107     *
108     * @param time the time to format
109     * @return the string containing the weekday and the date
110     */
111    public static String formatMonthYear(Context context, Time time) {
112        return time.format(context.getResources().getString(R.string.month_year));
113    }
114
115    // TODO: replace this with the correct i18n way to do this
116    public static final String englishNthDay[] = {
117        "", "1st", "2nd", "3rd", "4th", "5th", "6th", "7th", "8th", "9th",
118        "10th", "11th", "12th", "13th", "14th", "15th", "16th", "17th", "18th", "19th",
119        "20th", "21st", "22nd", "23rd", "24th", "25th", "26th", "27th", "28th", "29th",
120        "30th", "31st"
121    };
122
123    public static String formatNth(int nth) {
124        return "the " + englishNthDay[nth];
125    }
126
127    /**
128     * Sets the time to the beginning of the day (midnight) by clearing the
129     * hour, minute, and second fields.
130     */
131    static void setTimeToStartOfDay(Time time) {
132        time.second = 0;
133        time.minute = 0;
134        time.hour = 0;
135    }
136
137    /**
138     * Get first day of week as android.text.format.Time constant.
139     * @return the first day of week in android.text.format.Time
140     */
141    public static int getFirstDayOfWeek() {
142        int startDay = Calendar.getInstance().getFirstDayOfWeek();
143        if (startDay == Calendar.SATURDAY) {
144            return Time.SATURDAY;
145        } else if (startDay == Calendar.MONDAY) {
146            return Time.MONDAY;
147        } else {
148            return Time.SUNDAY;
149        }
150    }
151
152    /**
153     * Determine whether the column position is Saturday or not.
154     * @param column the column position
155     * @param firstDayOfWeek the first day of week in android.text.format.Time
156     * @return true if the column is Saturday position
157     */
158    public static boolean isSaturday(int column, int firstDayOfWeek) {
159        return (firstDayOfWeek == Time.SUNDAY && column == 6)
160            || (firstDayOfWeek == Time.MONDAY && column == 5)
161            || (firstDayOfWeek == Time.SATURDAY && column == 0);
162    }
163
164    /**
165     * Determine whether the column position is Sunday or not.
166     * @param column the column position
167     * @param firstDayOfWeek the first day of week in android.text.format.Time
168     * @return true if the column is Sunday position
169     */
170    public static boolean isSunday(int column, int firstDayOfWeek) {
171        return (firstDayOfWeek == Time.SUNDAY && column == 0)
172            || (firstDayOfWeek == Time.MONDAY && column == 6)
173            || (firstDayOfWeek == Time.SATURDAY && column == 1);
174    }
175}
176