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/*
* Copyright (c) 2010-2011, The MiCode Open Source Community (www.micode.net)
*
* 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 net.micode.notes.ui;
import java.util.Calendar;
import net.micode.notes.R;
import net.micode.notes.ui.DateTimePicker;
import net.micode.notes.ui.DateTimePicker.OnDateTimeChangedListener;
import android.app.AlertDialog;
import android.content.Context;
import android.content.DialogInterface;
import android.content.DialogInterface.OnClickListener;
import android.text.format.DateFormat;
import android.text.format.DateUtils;
/**
* 日期时间选择对话框继承自AlertDialog
* 提供日期和时间选择功能,并允许用户确认或取消选择
*/
public class DateTimePickerDialog extends AlertDialog implements OnClickListener {
private Calendar mDate = Calendar.getInstance();// 存储当前选择的日期时间
private boolean mIs24HourView;// 是否使用24小时制
private OnDateTimeSetListener mOnDateTimeSetListener;// 日期时间设置回调接口
private DateTimePicker mDateTimePicker; // 日期时间选择器视图
/**
* 日期时间设置回调接口
*/
public interface OnDateTimeSetListener {
void OnDateTimeSet(AlertDialog dialog, long date);
}
/**
* 构造函数
* @param context 上下文
* @param date 初始日期时间(毫秒时间戳)
*/
public DateTimePickerDialog(Context context, long date) {
super(context);
// 初始化日期时间选择器
mDateTimePicker = new DateTimePicker(context);
setView(mDateTimePicker);// 将选择器添加到对话框
// 设置日期时间变化监听器
mDateTimePicker.setOnDateTimeChangedListener(new OnDateTimeChangedListener() {
public void onDateTimeChanged(DateTimePicker view, int year, int month,
int dayOfMonth, int hourOfDay, int minute) {
// 更新当前选择的日期时间
mDate.set(Calendar.YEAR, year);
mDate.set(Calendar.MONTH, month);
mDate.set(Calendar.DAY_OF_MONTH, dayOfMonth);
mDate.set(Calendar.HOUR_OF_DAY, hourOfDay);
mDate.set(Calendar.MINUTE, minute);
// 更新对话框标题显示
updateTitle(mDate.getTimeInMillis());
}
});
// 设置初始日期时间
mDate.setTimeInMillis(date);
mDate.set(Calendar.SECOND, 0);// 秒数设为0
mDateTimePicker.setCurrentDate(mDate.getTimeInMillis());
// 设置对话框按钮
setButton(context.getString(R.string.datetime_dialog_ok), this);// 确定按钮
setButton2(context.getString(R.string.datetime_dialog_cancel), (OnClickListener)null);//取消按钮
set24HourView(DateFormat.is24HourFormat(this.getContext())); // 根据系统设置决定是否使用24小时制
updateTitle(mDate.getTimeInMillis());// 初始化对话框标题
}
/**
* 设置是否使用24小时制显示时间
* @param is24HourView true表示使用24小时制false表示12小时制
*/
public void set24HourView(boolean is24HourView) {
mIs24HourView = is24HourView;
}
/**
* 设置日期时间设置回调监听器
* @param callBack 回调接口实现
*/
public void setOnDateTimeSetListener(OnDateTimeSetListener callBack) {
mOnDateTimeSetListener = callBack;
}
/**
* 更新对话框标题显示
* @param date 当前日期时间(毫秒时间戳)
*/
private void updateTitle(long date) {
// 设置日期时间显示格式
int flag =
DateUtils.FORMAT_SHOW_YEAR |//显示年份
DateUtils.FORMAT_SHOW_DATE |//显示日期
DateUtils.FORMAT_SHOW_TIME;//显示时间
flag |= mIs24HourView ? DateUtils.FORMAT_24HOUR : DateUtils.FORMAT_24HOUR;// 根据设置添加24小时制或12小时制标志
setTitle(DateUtils.formatDateTime(this.getContext(), date, flag));// 格式化日期时间并设置为对话框标题
}
/**
* 对话框按钮点击事件处理
* @param arg0 对话框接口
* @param arg1 按钮ID
*/
public void onClick(DialogInterface arg0, int arg1) {
// 当用户点击确定按钮时,调用回调接口
if (mOnDateTimeSetListener != null) {
mOnDateTimeSetListener.OnDateTimeSet(this, mDate.getTimeInMillis());
}
}
}