76 lines
2.7 KiB
Java
76 lines
2.7 KiB
Java
/*
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* Copyright (C) 2018 The Android Open Source Project
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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package com.android.settings.datetime.timezone;
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import android.app.settings.SettingsEnums;
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import android.icu.util.TimeZone;
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import com.android.settings.R;
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import com.android.settings.datetime.timezone.model.TimeZoneData;
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import java.util.ArrayList;
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import java.util.Collections;
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import java.util.Date;
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import java.util.List;
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import java.util.Locale;
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/**
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* Render a list of fixed offset time zone {@class TimeZoneInfo} into a list view.
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*/
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public class FixedOffsetPicker extends BaseTimeZoneInfoPicker {
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/**
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* Range of integer fixed UTC offsets shown in the pickers.
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*/
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private static final int MIN_HOURS_OFFSET = -14;
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private static final int MAX_HOURS_OFFSET = +12;
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public FixedOffsetPicker() {
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super(R.string.date_time_select_fixed_offset_time_zones,
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R.string.search_settings, false, false);
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}
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@Override
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public int getMetricsCategory() {
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return SettingsEnums.SETTINGS_ZONE_PICKER_FIXED_OFFSET;
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}
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@Override
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public List<TimeZoneInfo> getAllTimeZoneInfos(TimeZoneData timeZoneData) {
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return loadFixedOffsets();
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}
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/**
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* Returns a {@link TimeZoneInfo} for each fixed offset time zone, such as UTC or GMT+4. The
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* returned list will be sorted in a reasonable way for display.
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*/
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private List<TimeZoneInfo> loadFixedOffsets() {
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final TimeZoneInfo.Formatter formatter = new TimeZoneInfo.Formatter(getLocale(),
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new Date());
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final List<TimeZoneInfo> timeZoneInfos = new ArrayList<>();
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timeZoneInfos.add(formatter.format(TimeZone.getFrozenTimeZone("Etc/UTC")));
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for (int hoursOffset = MAX_HOURS_OFFSET; hoursOffset >= MIN_HOURS_OFFSET; --hoursOffset) {
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if (hoursOffset == 0) {
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// UTC is handled above, so don't add GMT +/-0 again.
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continue;
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}
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final String id = String.format(Locale.US, "Etc/GMT%+d", hoursOffset);
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timeZoneInfos.add(formatter.format(TimeZone.getFrozenTimeZone(id)));
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}
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return Collections.unmodifiableList(timeZoneInfos);
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}
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}
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