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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.util.Calendar;
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import net.micode.notes.R;
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import net.micode.notes.ui.DateTimePicker;
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import net.micode.notes.ui.DateTimePicker.OnDateTimeChangedListener;
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import android.app.AlertDialog;
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import android.content.Context;
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import android.content.DialogInterface;
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import android.content.DialogInterface.OnClickListener;
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import android.text.format.DateFormat;
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import android.text.format.DateUtils;
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public class DateTimePickerDialog extends AlertDialog implements OnClickListener {
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private Calendar mDate = Calendar.getInstance();//便于时间操作
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private boolean mIs24HourView;
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private OnDateTimeSetListener mOnDateTimeSetListener;//时间日期滚动控件
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private DateTimePicker mDateTimePicker;//用于设置或获取日期和时间
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public interface OnDateTimeSetListener {
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//在选择日期后返回结果
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void OnDateTimeSet(AlertDialog dialog, long date);
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}
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public DateTimePickerDialog(Context context, long date) {
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super(context);
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mDateTimePicker = new DateTimePicker(context);
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setView(mDateTimePicker); //设置一个子视图
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//设置一个监听器
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mDateTimePicker.setOnDateTimeChangedListener(new OnDateTimeChangedListener() {
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public void onDateTimeChanged(DateTimePicker view, int year, int month,
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int dayOfMonth, int hourOfDay, int minute) {
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//设置日期时间为用户选择的日期和时间
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mDate.set(Calendar.YEAR, year);
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mDate.set(Calendar.MONTH, month);
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mDate.set(Calendar.DAY_OF_MONTH, dayOfMonth);
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mDate.set(Calendar.HOUR_OF_DAY, hourOfDay);
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mDate.set(Calendar.MINUTE, minute);
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// 更新标题为选择的日期和时间
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updateTitle(mDate.getTimeInMillis());
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}
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});
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mDate.setTimeInMillis(date);// 初始化mDate对象
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mDate.set(Calendar.SECOND, 0);// 将秒数设为0
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mDateTimePicker.setCurrentDate(mDate.getTimeInMillis());
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// 为对话框设置一个确定按钮
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setButton(context.getString(R.string.datetime_dialog_ok), this);
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// 为对话框设置一个取消按钮，传入null为点击事件处理器
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setButton2(context.getString(R.string.datetime_dialog_cancel), (OnClickListener)null);
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//根据当前的时间的时间格式设置是否使用24小时制显示时间
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set24HourView(DateFormat.is24HourFormat(this.getContext()));
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updateTitle(mDate.getTimeInMillis());// 更新对话框的标题为初始日期和时间
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}
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public void set24HourView(boolean is24HourView) {
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mIs24HourView = is24HourView;
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}
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public void setOnDateTimeSetListener(OnDateTimeSetListener callBack) {
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mOnDateTimeSetListener = callBack;
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}
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private void updateTitle(long date) {
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// 定义一个标识变量，用于根据给定的日期时间更新标题栏的显示
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int flag =
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DateUtils.FORMAT_SHOW_YEAR |
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DateUtils.FORMAT_SHOW_DATE |
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DateUtils.FORMAT_SHOW_TIME;
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// 根据用户选择的，决定是否使用24小时制
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flag |= mIs24HourView ? DateUtils.FORMAT_24HOUR : DateUtils.FORMAT_24HOUR;
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// 将日期转化为字符串，并设置标题
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setTitle(DateUtils.formatDateTime(this.getContext(), date, flag));
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}
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// 用于处理对话框的点击事件
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public void onClick(DialogInterface arg0, int arg1) {
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// 如果有日期时间设置监听器，则传递当前日期时间
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if (mOnDateTimeSetListener != null) {
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mOnDateTimeSetListener.OnDateTimeSet(this, mDate.getTimeInMillis());
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}
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}
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} |
