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note/DateTimePickerDialog.java

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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;
/**
* 自定义的日期时间选择对话框。
* 用于选择日期和时间支持24小时制和12小时制显示。
*/
public class DateTimePickerDialog extends AlertDialog implements OnClickListener {
// 当前选择的日期和时间
private Calendar mDate = Calendar.getInstance();
// 是否为24小时制
private boolean mIs24HourView;
// 日期时间选择回调
private OnDateTimeSetListener mOnDateTimeSetListener;
// 日期时间选择器控件
private DateTimePicker mDateTimePicker;
/**
* 日期时间设置回调接口。
* 当用户选择完日期时间后,回调此方法。
*/
public interface OnDateTimeSetListener {
void OnDateTimeSet(AlertDialog dialog, long date);
}
/**
* 构造函数,初始化日期时间选择对话框。
* @param context 上下文
* @param date 初始日期时间
*/
public DateTimePickerDialog(Context context, long date) {
super(context);
// 创建 DateTimePicker 控件,并设置监听器
mDateTimePicker = new DateTimePicker(context);
setView(mDateTimePicker);
mDateTimePicker.setOnDateTimeChangedListener(new OnDateTimeChangedListener() {
// 日期时间改变监听器
public void onDateTimeChanged(DateTimePicker view, int year, int month,
int dayOfMonth, int hourOfDay, int minute) {
// 更新选中的日期和时间
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的日期时间
updateTitle(mDate.getTimeInMillis());
}
});
// 设置初始日期时间
mDate.setTimeInMillis(date);
mDate.set(Calendar.SECOND, 0); // 将秒数设置为0
mDateTimePicker.setCurrentDate(mDate.getTimeInMillis()); // 初始化日期时间选择器
// 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
// 设置是否为24小时制
set24HourView(DateFormat.is24HourFormat(this.getContext()));
// 更新对话框标题
updateTitle(mDate.getTimeInMillis());
}
/**
* 设置是否为24小时制
* @param is24HourView 是否为24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
*/
public void setOnDateTimeSetListener(OnDateTimeSetListener callBack) {
mOnDateTimeSetListener = callBack;
}
/**
* 更新对话框标题,显示当前选择的日期和时间
* @param date 当前选择的日期时间
*/
private void updateTitle(long date) {
// 设置显示的日期格式,包含年、月、日和时间
int flag =
DateUtils.FORMAT_SHOW_YEAR |
DateUtils.FORMAT_SHOW_DATE |
DateUtils.FORMAT_SHOW_TIME;
// 如果是24小时制更新显示格式
flag |= mIs24HourView ? DateUtils.FORMAT_24HOUR : DateUtils.FORMAT_12HOUR;
// 设置对话框标题为格式化后的日期时间
setTitle(DateUtils.formatDateTime(this.getContext(), date, flag));
}
/**
* 确定按钮的点击事件处理
* 当用户点击确定按钮时,调用回调接口
*/
public void onClick(DialogInterface arg0, int arg1) {
if (mOnDateTimeSetListener != null) {
// 回调监听器,传递选中的日期时间
mOnDateTimeSetListener.OnDateTimeSet(this, mDate.getTimeInMillis());
}
}
}