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/*
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* Copyright (c) 2010-2011, The MiCode Open Source Community (www.micode.net)
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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 net.micode.notes.ui;
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import java.text.DateFormatSymbols;
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import java.util.Calendar;
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import net.micode.notes.R;
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import android.content.Context;
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import android.text.format.DateFormat;
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import android.view.View;
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import android.widget.FrameLayout;
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import android.widget.NumberPicker;
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public class DateTimePicker extends FrameLayout {
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private static final boolean DEFAULT_ENABLE_STATE = true;
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// 一天中的小时数
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private static final int HOURS_IN_HALF_DAY = 12;
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private static final int HOURS_IN_ALL_DAY = 24;
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private static final int DAYS_IN_ALL_WEEK = 7;
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// 不同选择器的最小和最大值
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private static final int DATE_SPINNER_MIN_VAL = 0;
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private static final int DATE_SPINNER_MAX_VAL = DAYS_IN_ALL_WEEK - 1;
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private static final int HOUR_SPINNER_MIN_VAL_24_HOUR_VIEW = 0;
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private static final int HOUR_SPINNER_MAX_VAL_24_HOUR_VIEW = 23;
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private static final int HOUR_SPINNER_MIN_VAL_12_HOUR_VIEW = 1;
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private static final int HOUR_SPINNER_MAX_VAL_12_HOUR_VIEW = 12;
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private static final int MINUT_SPINNER_MIN_VAL = 0;
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private static final int MINUT_SPINNER_MAX_VAL = 59;
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private static final int AMPM_SPINNER_MIN_VAL = 0;
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private static final int AMPM_SPINNER_MAX_VAL = 1;
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// 时间选择器和监听器初始化
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private final NumberPicker mDateSpinner; // 日期选择器
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private final NumberPicker mHourSpinner; // 小时选择器
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private final NumberPicker mMinuteSpinner; // 分钟选择器
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private final NumberPicker mAmPmSpinner; // 上午/下午选择器
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private Calendar mDate; // 日期
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private String[] mDateDisplayValues = new String[DAYS_IN_ALL_WEEK]; // 日期显示值
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private boolean mIsAm; // 是否是上午
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private boolean mIs24HourView; // 是否是24小时制
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private boolean mIsEnabled = DEFAULT_ENABLE_STATE; // 是否启用
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private boolean mInitialising; // 是否初始化中
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private OnDateTimeChangedListener mOnDateTimeChangedListener; // 日期时间改变监听器
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// 日期改变监听器
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private NumberPicker.OnValueChangeListener mOnDateChangedListener = new NumberPicker.OnValueChangeListener() {
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@Override
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public void onValueChange(NumberPicker picker, int oldVal, int newVal) {
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mDate.add(Calendar.DAY_OF_YEAR, newVal - oldVal); // 更新日期
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updateDateControl(); // 更新日期控件
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onDateTimeChanged(); // 日期时间改变回调
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}
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};
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// 小时改变监听器
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private NumberPicker.OnValueChangeListener mOnHourChangedListener = new NumberPicker.OnValueChangeListener() {
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@Override
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public void onValueChange(NumberPicker picker, int oldVal, int newVal) {
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boolean isDateChanged = false; // 是否日期发生改变
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Calendar cal = Calendar.getInstance(); // 创建一个新的日历实例
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if (!mIs24HourView) { // 如果不是24小时制
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// 判断是否需要调整日期
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if (!mIsAm && oldVal == HOURS_IN_HALF_DAY - 1 && newVal == HOURS_IN_HALF_DAY) {
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cal.setTimeInMillis(mDate.getTimeInMillis());
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cal.add(Calendar.DAY_OF_YEAR, 1);
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isDateChanged = true;
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} else if (mIsAm && oldVal == HOURS_IN_HALF_DAY && newVal == HOURS_IN_HALF_DAY - 1) {
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cal.setTimeInMillis(mDate.getTimeInMillis());
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cal.add(Calendar.DAY_OF_YEAR, -1);
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isDateChanged = true;
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}
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// 判断是否需要切换上午/下午并更新控件
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if (oldVal == HOURS_IN_HALF_DAY - 1 && newVal == HOURS_IN_HALF_DAY ||
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oldVal == HOURS_IN_HALF_DAY && newVal == HOURS_IN_HALF_DAY - 1) {
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mIsAm = !mIsAm; // 切换上午/下午标志
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updateAmPmControl(); // 更新上午/下午选择器控件
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}
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} else { // 如果是24小时制
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// 判断是否需要调整日期
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if (oldVal == HOURS_IN_ALL_DAY - 1 && newVal == 0) {
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cal.setTimeInMillis(mDate.getTimeInMillis());
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cal.add(Calendar.DAY_OF_YEAR, 1);
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isDateChanged = true;
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} else if (oldVal == 0 && newVal == HOURS_IN_ALL_DAY - 1) {
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cal.setTimeInMillis(mDate.getTimeInMillis());
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cal.add(Calendar.DAY_OF_YEAR, -1);
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isDateChanged = true;
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}
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}
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// 计算新的小时数并更新日期时间
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int newHour = mHourSpinner.getValue() % HOURS_IN_HALF_DAY + (mIsAm ? 0 : HOURS_IN_HALF_DAY);
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mDate.set(Calendar.HOUR_OF_DAY, newHour);
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onDateTimeChanged(); // 日期时间改变回调
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if (isDateChanged) {
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setCurrentYear(cal.get(Calendar.YEAR)); // 更新年份
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setCurrentMonth(cal.get(Calendar.MONTH)); // 更新月份
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setCurrentDay(cal.get(Calendar.DAY_OF_MONTH)); // 更新日期
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}
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}
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};
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// 分钟改变监听器
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private NumberPicker.OnValueChangeListener mOnMinuteChangedListener = new NumberPicker.OnValueChangeListener() {
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@Override
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public void onValueChange(NumberPicker picker, int oldVal, int newVal) {
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int minValue = mMinuteSpinner.getMinValue(); // 获取分钟选择器的最小值
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int maxValue = mMinuteSpinner.getMaxValue(); // 获取分钟选择器的最大值
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int offset = 0; // 偏移量初始化为0
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// 判断是否需要调整小时
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if (oldVal == maxValue && newVal == minValue) { // 如果从最大值切换到最小值
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offset += 1; // 增加一小时偏移量
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} else if (oldVal == minValue && newVal == maxValue) { // 如果从最小值切换到最大值
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offset -= 1; // 减少一小时偏移量
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}
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// 如果有偏移量
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if (offset != 0) {
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mDate.add(Calendar.HOUR_OF_DAY, offset); // 对日期时间进行小时调整
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mHourSpinner.setValue(getCurrentHour()); // 更新小时选择器控件
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updateDateControl(); // 更新日期控件
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int newHour = getCurrentHourOfDay(); // 获取当前小时
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if (newHour >= HOURS_IN_HALF_DAY) { // 如果当前小时大于等于12
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mIsAm = false; // 设置为下午
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updateAmPmControl(); // 更新上午/下午选择器控件
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} else {
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mIsAm = true; // 设置为上午
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updateAmPmControl(); // 更新上午/下午选择器控件
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}
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}
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mDate.set(Calendar.MINUTE, newVal); // 设置日期的分钟部分
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onDateTimeChanged(); // 日期时间改变回调
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}
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};
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// 上午/下午改变监听器
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private NumberPicker.OnValueChangeListener mOnAmPmChangedListener = new NumberPicker.OnValueChangeListener() {
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@Override
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public void onValueChange(NumberPicker picker, int oldVal, int newVal) {
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mIsAm = !mIsAm; // 切换上午/下午状态
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if (mIsAm) {
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mDate.add(Calendar.HOUR_OF_DAY, -HOURS_IN_HALF_DAY); // 如果是上午，减去12小时
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} else {
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mDate.add(Calendar.HOUR_OF_DAY, HOURS_IN_HALF_DAY); // 如果是下午，加上12小时
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}
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updateAmPmControl(); // 更新上午/下午选择器控件
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onDateTimeChanged(); // 日期时间改变回调
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}
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};
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// 日期时间改变监听器接口
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public interface OnDateTimeChangedListener {
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void onDateTimeChanged(DateTimePicker view, int year, int month,
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int dayOfMonth, int hourOfDay, int minute);
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}
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// 构造函数，根据当前时间初始化DateTimePicker
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public DateTimePicker(Context context) {
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this(context, System.currentTimeMillis());
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}
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// 构造函数，根据指定时间和是否为24小时制初始化DateTimePicker
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public DateTimePicker(Context context, long date) {
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this(context, date, DateFormat.is24HourFormat(context));
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}
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// 构造函数，根据指定时间、指定是否为24小时制初始化DateTimePicker
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public DateTimePicker(Context context, long date, boolean is24HourView) {
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super(context);
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mDate = Calendar.getInstance(); // 初始化日历实例
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mInitialising = true; // 标记初始化中
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mIsAm = getCurrentHourOfDay() >= HOURS_IN_HALF_DAY; // 根据当前小时是否大于等于12判断是否为上午
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inflate(context, R.layout.datetime_picker, this); // 填充布局
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// 初始化日期选择器
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mDateSpinner = (NumberPicker) findViewById(R.id.date);
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mDateSpinner.setMinValue(DATE_SPINNER_MIN_VAL);
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mDateSpinner.setMaxValue(DATE_SPINNER_MAX_VAL);
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mDateSpinner.setOnValueChangedListener(mOnDateChangedListener);
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// 初始化小时选择器
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mHourSpinner = (NumberPicker) findViewById(R.id.hour);
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mHourSpinner.setOnValueChangedListener(mOnHourChangedListener);
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// 初始化分钟选择器
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mMinuteSpinner = (NumberPicker) findViewById(R.id.minute);
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mMinuteSpinner.setMinValue(MINUT_SPINNER_MIN_VAL);
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mMinuteSpinner.setMaxValue(MINUT_SPINNER_MAX_VAL);
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mMinuteSpinner.setOnLongPressUpdateInterval(100);
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mMinuteSpinner.setOnValueChangedListener(mOnMinuteChangedListener);
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// 初始化上午/下午选择器
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String[] stringsForAmPm = new DateFormatSymbols().getAmPmStrings();
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mAmPmSpinner = (NumberPicker) findViewById(R.id.amPm);
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mAmPmSpinner.setMinValue(AMPM_SPINNER_MIN_VAL);
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mAmPmSpinner.setMaxValue(AMPM_SPINNER_MAX_VAL);
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mAmPmSpinner.setDisplayedValues(stringsForAmPm);
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mAmPmSpinner.setOnValueChangedListener(mOnAmPmChangedListener);
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// 更新控件到初始状态
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updateDateControl();
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updateHourControl();
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updateAmPmControl();
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set24HourView(is24HourView); // 设置是否为24小时制
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setCurrentDate(date); // 设置当前时间
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setEnabled(isEnabled()); // 设置是否可用
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// 设置内容描述
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mInitialising = false;
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}
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// 设置DateTimePicker的可用状态
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@Override
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public void setEnabled(boolean enabled) {
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if (mIsEnabled == enabled) {
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return;
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}
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super.setEnabled(enabled);
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mDateSpinner.setEnabled(enabled);
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mMinuteSpinner.setEnabled(enabled);
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mHourSpinner.setEnabled(enabled);
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mAmPmSpinner.setEnabled(enabled);
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mIsEnabled = enabled;
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}
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// 获取DateTimePicker的可用状态
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@Override
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public boolean isEnabled() {
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return mIsEnabled;
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}
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/**
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* 获取当前日期的毫秒表示
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*
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* @return 当前日期的毫秒表示
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*/
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public long getCurrentDateInTimeMillis() {
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return mDate.getTimeInMillis();
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}
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/**
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* 设置当前日期
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*
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* @param date 当前日期的毫秒表示
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*/
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public void setCurrentDate(long date) {
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Calendar cal = Calendar.getInstance();
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cal.setTimeInMillis(date);
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setCurrentDate(cal.get(Calendar.YEAR), cal.get(Calendar.MONTH), cal.get(Calendar.DAY_OF_MONTH),
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cal.get(Calendar.HOUR_OF_DAY), cal.get(Calendar.MINUTE));
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}
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/**
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* 设置当前日期
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*
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* @param year 年份
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* @param month 月份
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* @param dayOfMonth 日期
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* @param hourOfDay 小时
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* @param minute 分钟
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*/
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public void setCurrentDate(int year, int month,
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int dayOfMonth, int hourOfDay, int minute) {
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setCurrentYear(year);
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setCurrentMonth(month);
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setCurrentDay(dayOfMonth);
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setCurrentHour(hourOfDay);
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setCurrentMinute(minute);
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}
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/**
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* 获取当前年份
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*
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* @return 当前年份
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*/
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public int getCurrentYear() {
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return mDate.get(Calendar.YEAR);
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}
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/**
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* 设置当前年份
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*
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* @param year 当前年份
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*/
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public void setCurrentYear(int year) {
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if (!mInitialising && year == getCurrentYear()) {
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return;
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}
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mDate.set(Calendar.YEAR, year);
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updateDateControl();
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onDateTimeChanged();
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}
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/**
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* 获取当前月份
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*
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* @return 当前月份
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*/
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public int getCurrentMonth() {
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return mDate.get(Calendar.MONTH);
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}
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/**
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* 设置当前月份
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*
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* @param month 月份
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*/
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public void setCurrentMonth(int month) {
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if (!mInitialising && month == getCurrentMonth()) {
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return;
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}
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mDate.set(Calendar.MONTH, month);
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updateDateControl();
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onDateTimeChanged();
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}
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/**
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* 获取当前月份中的日期
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*
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* @return 当前月份中的日期
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*/
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public int getCurrentDay() {
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return mDate.get(Calendar.DAY_OF_MONTH);
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}
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/**
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* 设置当前月份中的日期
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*
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* @param dayOfMonth 月份中的日期
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*/
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public void setCurrentDay(int dayOfMonth) {
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if (!mInitialising && dayOfMonth == getCurrentDay()) {
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return;
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}
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mDate.set(Calendar.DAY_OF_MONTH, dayOfMonth);
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updateDateControl();
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onDateTimeChanged();
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}
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/**
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* 获取24小时制下的当前小时，范围为（0~23）
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*
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* @return 24小时制下的当前小时
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*/
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public int getCurrentHourOfDay() {
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return mDate.get(Calendar.HOUR_OF_DAY);
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}
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/**
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* 获取当前小时，如果为24小时制则返回24小时制下的当前小时，否则返回12小时制下的当前小时
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* @return 当前小时
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*/
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private int getCurrentHour() {
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if (mIs24HourView){
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return getCurrentHourOfDay();
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} else {
|
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int hour = getCurrentHourOfDay();
|
|
|
if (hour > HOURS_IN_HALF_DAY) {
|
|
|
return hour - HOURS_IN_HALF_DAY;
|
|
|
} else {
|
|
|
return hour == 0 ? HOURS_IN_HALF_DAY : hour;
|
|
|
}
|
|
|
}
|
|
|
}
|
|
|
|
|
|
|
|
|
/**
|
|
|
* 设置当前小时（24小时制下），范围为（0~23）
|
|
|
*
|
|
|
* @param hourOfDay 当前小时
|
|
|
*/
|
|
|
public void setCurrentHour(int hourOfDay) {
|
|
|
// 如果不是初始化状态并且传入的小时等于当前小时，则直接返回
|
|
|
if (!mInitialising && hourOfDay == getCurrentHourOfDay()) {
|
|
|
return;
|
|
|
}
|
|
|
// 设置日期时间中的小时
|
|
|
mDate.set(Calendar.HOUR_OF_DAY, hourOfDay);
|
|
|
|
|
|
// 如果不是24小时制，则更新AM/PM控件
|
|
|
if (!mIs24HourView) {
|
|
|
if (hourOfDay >= HOURS_IN_HALF_DAY) {
|
|
|
mIsAm = false;
|
|
|
if (hourOfDay > HOURS_IN_HALF_DAY) {
|
|
|
hourOfDay -= HOURS_IN_HALF_DAY;
|
|
|
}
|
|
|
} else {
|
|
|
mIsAm = true;
|
|
|
if (hourOfDay == 0) {
|
|
|
hourOfDay = HOURS_IN_HALF_DAY;
|
|
|
}
|
|
|
}
|
|
|
updateAmPmControl(); // 更新AM/PM控件
|
|
|
}
|
|
|
mHourSpinner.setValue(hourOfDay); // 更新小时控件显示值
|
|
|
onDateTimeChanged(); // 触发日期时间改变事件
|
|
|
}
|
|
|
|
|
|
/**
|
|
|
* 获取当前分钟
|
|
|
*
|
|
|
* @return 当前分钟
|
|
|
*/
|
|
|
public int getCurrentMinute() {
|
|
|
return mDate.get(Calendar.MINUTE);
|
|
|
}
|
|
|
|
|
|
/**
|
|
|
* 设置当前分钟
|
|
|
*
|
|
|
* @param minute 分钟
|
|
|
*/
|
|
|
public void setCurrentMinute(int minute) {
|
|
|
if (!mInitialising && minute == getCurrentMinute()) {
|
|
|
return;
|
|
|
}
|
|
|
// 设置日期时间中的分钟
|
|
|
mMinuteSpinner.setValue(minute);
|
|
|
mDate.set(Calendar.MINUTE, minute);
|
|
|
onDateTimeChanged(); // 触发日期时间改变事件
|
|
|
}
|
|
|
|
|
|
/**
|
|
|
* 检查是否处于24小时制模式
|
|
|
*
|
|
|
* @return 如果处于24小时制模式返回true，否则返回false
|
|
|
*/
|
|
|
public boolean is24HourView() {
|
|
|
return mIs24HourView;
|
|
|
}
|
|
|
|
|
|
/**
|
|
|
* 设置是否处于24小时制模式或AM/PM模式
|
|
|
*
|
|
|
* @param is24HourView true表示处于24小时制模式，false表示处于AM/PM模式
|
|
|
*/
|
|
|
public void set24HourView(boolean is24HourView) {
|
|
|
if (mIs24HourView == is24HourView) {
|
|
|
return;
|
|
|
}
|
|
|
// 设置是否为24小时制模式
|
|
|
mIs24HourView = is24HourView;
|
|
|
|
|
|
// 根据是否是24小时制设置AM/PM控件的可见性
|
|
|
mAmPmSpinner.setVisibility(is24HourView ? View.GONE : View.VISIBLE);
|
|
|
|
|
|
// 获取当前小时并更新小时控件
|
|
|
int hour = getCurrentHourOfDay();
|
|
|
updateHourControl(); // 更新小时控件
|
|
|
setCurrentHour(hour); // 设置当前小时
|
|
|
updateAmPmControl(); // 更新AM/PM控件
|
|
|
}
|
|
|
|
|
|
/**
|
|
|
* 更新日期控件
|
|
|
*/
|
|
|
private void updateDateControl() {
|
|
|
Calendar cal = Calendar.getInstance();
|
|
|
cal.setTimeInMillis(mDate.getTimeInMillis());
|
|
|
cal.add(Calendar.DAY_OF_YEAR, -DAYS_IN_ALL_WEEK / 2 - 1);
|
|
|
mDateSpinner.setDisplayedValues(null);
|
|
|
for (int i = 0; i < DAYS_IN_ALL_WEEK; ++i) {
|
|
|
cal.add(Calendar.DAY_OF_YEAR, 1);
|
|
|
mDateDisplayValues[i] = (String) DateFormat.format("MM.dd EEEE", cal);
|
|
|
}
|
|
|
mDateSpinner.setDisplayedValues(mDateDisplayValues);
|
|
|
mDateSpinner.setValue(DAYS_IN_ALL_WEEK / 2);
|
|
|
mDateSpinner.invalidate();
|
|
|
}
|
|
|
|
|
|
/**
|
|
|
* 更新AM/PM控件
|
|
|
*/
|
|
|
private void updateAmPmControl() {
|
|
|
if (mIs24HourView) {
|
|
|
mAmPmSpinner.setVisibility(View.GONE);
|
|
|
} else {
|
|
|
int index = mIsAm ? Calendar.AM : Calendar.PM;
|
|
|
mAmPmSpinner.setValue(index);
|
|
|
mAmPmSpinner.setVisibility(View.VISIBLE);
|
|
|
}
|
|
|
}
|
|
|
|
|
|
/**
|
|
|
* 更新小时控件
|
|
|
*/
|
|
|
private void updateHourControl() {
|
|
|
if (mIs24HourView) {
|
|
|
mHourSpinner.setMinValue(HOUR_SPINNER_MIN_VAL_24_HOUR_VIEW);
|
|
|
mHourSpinner.setMaxValue(HOUR_SPINNER_MAX_VAL_24_HOUR_VIEW);
|
|
|
} else {
|
|
|
mHourSpinner.setMinValue(HOUR_SPINNER_MIN_VAL_12_HOUR_VIEW);
|
|
|
mHourSpinner.setMaxValue(HOUR_SPINNER_MAX_VAL_12_HOUR_VIEW);
|
|
|
}
|
|
|
}
|
|
|
|
|
|
/**
|
|
|
* 设置“设置”按钮按下时的回调
|
|
|
*
|
|
|
* @param callback 回调函数，如果为null则不执行任何操作
|
|
|
*/
|
|
|
public void setOnDateTimeChangedListener(OnDateTimeChangedListener callback) {
|
|
|
mOnDateTimeChangedListener = callback;
|
|
|
}
|
|
|
|
|
|
/**
|
|
|
* 当日期时间发生改变时的回调函数
|
|
|
*/
|
|
|
private void onDateTimeChanged() {
|
|
|
if (mOnDateTimeChangedListener != null) {
|
|
|
// 触发日期时间改变事件，传递当前年、月、日、小时、分钟
|
|
|
mOnDateTimeChangedListener.onDateTimeChanged(this, getCurrentYear(),
|
|
|
getCurrentMonth(), getCurrentDay(), getCurrentHourOfDay(), getCurrentMinute());
|
|
|
}
|
|
|
}
|
|
|
|
|
|
}
|
