/* * Copyright (C) 2017 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.dialer.calllogutils; import android.content.Context; import android.icu.lang.UCharacter; import android.icu.text.BreakIterator; import android.os.Build.VERSION; import android.os.Build.VERSION_CODES; import android.text.format.DateUtils; import java.util.Calendar; import java.util.Locale; import java.util.concurrent.TimeUnit; /** Static methods for formatting dates in the call log. */ public final class CallLogDates { /** * Uses the new date formatting rules to format dates in the new call log. * *
Rules: * *
* if < 1 minute ago: "Now"; * else if today: "12:15 PM" * else if < 3 days ago: "Wednesday"; * else: "Jan 15" **/ public static CharSequence newCallLogTimestampLabel( Context context, long nowMillis, long timestampMillis) { if (nowMillis - timestampMillis < TimeUnit.MINUTES.toMillis(1)) { return context.getString(R.string.now); } if (isSameDay(nowMillis, timestampMillis)) { return DateUtils.formatDateTime( context, timestampMillis, DateUtils.FORMAT_SHOW_TIME); // e.g. 12:15 PM } if (getDayDifference(nowMillis, timestampMillis) < 3) { return formatDayOfWeek(context, timestampMillis); // e.g. "Wednesday" } return formatAbbreviatedMonthAndDay(context, timestampMillis); // e.g. "Jan 15" } /** * Formats the provided date into a value suitable for display in the current locale. * *
For example, returns a string like "Wednesday, May 25, 2016, 8:02PM" or "Chorshanba, 2016 * may 25,20:02". * *
For pre-N devices, the returned value may not start with a capital if the local convention * is to not capitalize day names. On N+ devices, the returned value is always capitalized. */ public static CharSequence formatDate(Context context, long callDateMillis) { return toTitleCase( DateUtils.formatDateTime( context, callDateMillis, DateUtils.FORMAT_SHOW_TIME | DateUtils.FORMAT_SHOW_DATE | DateUtils.FORMAT_SHOW_WEEKDAY | DateUtils.FORMAT_SHOW_YEAR)); } /** * Formats the provided date into the day of week. * *
For example, returns a string like "Wednesday" or "Chorshanba". * *
For pre-N devices, the returned value may not start with a capital if the local convention * is to not capitalize day names. On N+ devices, the returned value is always capitalized. */ private static CharSequence formatDayOfWeek(Context context, long callDateMillis) { return toTitleCase( DateUtils.formatDateTime(context, callDateMillis, DateUtils.FORMAT_SHOW_WEEKDAY)); } /** * Formats the provided date into the month abbreviation and day. * *
For example, returns a string like "Jan 15". * *
For pre-N devices, the returned value may not start with a capital if the local convention * is to not capitalize day names. On N+ devices, the returned value is always capitalized. */ private static CharSequence formatAbbreviatedMonthAndDay(Context context, long callDateMillis) { return toTitleCase( DateUtils.formatDateTime( context, callDateMillis, DateUtils.FORMAT_ABBREV_MONTH | DateUtils.FORMAT_NO_YEAR)); } private static CharSequence toTitleCase(CharSequence value) { // We want the beginning of the date string to be capitalized, even if the word at the beginning // of the string is not usually capitalized. For example, "Wednesdsay" in Uzbek is "chorshanba” // (not capitalized). To handle this issue we apply title casing to the start of the sentence so // that "chorshanba, 2016 may 25,20:02" becomes "Chorshanba, 2016 may 25,20:02". // // The ICU library was not available in Android until N, so we can only do this in N+ devices. // Pre-N devices will still see incorrect capitalization in some languages. if (VERSION.SDK_INT < VERSION_CODES.N) { return value; } // Using the ICU library is safer than just applying toUpperCase() on the first letter of the // word because in some languages, there can be multiple starting characters which should be // upper-cased together. For example in Dutch "ij" is a digraph in which both letters should be // capitalized together. // TITLECASE_NO_LOWERCASE is necessary so that things that are already capitalized are not // lower-cased as part of the conversion. return UCharacter.toTitleCase( Locale.getDefault(), value.toString(), BreakIterator.getSentenceInstance(), UCharacter.TITLECASE_NO_LOWERCASE); } /** * Returns the absolute difference in days between two timestamps. It is the caller's * responsibility to ensure both timestamps are in milliseconds. Failure to do so will result in * undefined behavior. * *
Note that the difference is based on day boundaries, not 24-hour periods. * *
Examples: * *