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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 {//公共类DateTimePickerDialog扩展警报对话框实现了DialogInterface。OnClickListener
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private Calendar mDate = Calendar.getInstance();//创建一个Calendar类型的变量 mDate，方便时间的操作
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private boolean mIs24HourView;
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private OnDateTimeSetListener mOnDateTimeSetListener; //声明一个时间日期滚动选择控件
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private DateTimePicker mDateTimePicker;//该控件一般用于让用户可以从日期列表中选择单个值
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public interface OnDateTimeSetListener {
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void OnDateTimeSet(AlertDialog dialog, long date);
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}
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public DateTimePickerDialog(Context context, long date) {//日期时间选取器对话框
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super(context);
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mDateTimePicker = new DateTimePicker(context);
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setView(mDateTimePicker);//设置要在该对话框中显示的视图。
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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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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);//将视图中的各选项设置为系统当前时间
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updateTitle(mDate.getTimeInMillis());
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}
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});
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mDate.setTimeInMillis(date);//得到系统时间
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mDate.set(Calendar.SECOND, 0);//秒数归零
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mDateTimePicker.setCurrentDate(mDate.getTimeInMillis());
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setButton(context.getString(R.string.datetime_dialog_ok), this);//设置按钮
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setButton2(context.getString(R.string.datetime_dialog_cancel), (OnClickListener)null);//设置按钮
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set24HourView(DateFormat.is24HourFormat(this.getContext()));//时间标准化打印，如果时间应该格式化为24小时时间，则返回true;如果时间应该格式化为12小时(AM/PM)时间，则返回false。基于用户选择的语言环境和其他首选项。
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updateTitle(mDate.getTimeInMillis());
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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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}//将时间日期滚动选择控件实例化
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private void updateTitle(long date) {
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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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flag |= mIs24HourView ? DateUtils.FORMAT_24HOUR : DateUtils.FORMAT_24HOUR;
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setTitle(DateUtils.formatDateTime(this.getContext(), date, flag));
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}//按照上下午显示时间
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public void onClick(DialogInterface arg0, int arg1) {
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if (mOnDateTimeSetListener != null) {
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mOnDateTimeSetListener.OnDateTimeSet(this, mDate.getTimeInMillis());
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}//点击后的响应操作
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}
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} |
