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gitProject1/doc/向金成——精读代码/ui/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;
public class DateTimePickerDialog extends AlertDialog implements OnClickListener {
private Calendar mDate = Calendar.getInstance();//calendar变量便于时间操作
private boolean mIs24HourView;
private OnDateTimeSetListener mOnDateTimeSetListener;//监听用户设置时间
private DateTimePicker mDateTimePicker;//view对象选择器
public interface OnDateTimeSetListener {
void OnDateTimeSet(AlertDialog dialog, long date);
}
public DateTimePickerDialog(Context context, long date) {
super(context);//实例化
mDateTimePicker = new DateTimePicker(context);
setView(mDateTimePicker);//添加视图
mDateTimePicker.setOnDateTimeChangedListener(new OnDateTimeChangedListener() {
public void onDateTimeChanged(DateTimePicker view, int year, int month,
int dayOfMonth, int hourOfDay, int minute) {
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);//设置当前时间
updateTitle(mDate.getTimeInMillis());
}
});//向选择时间的选择器设置监听时间改变的监听器
mDate.setTimeInMillis(date);//设置时间毫秒单位
mDate.set(Calendar.SECOND, 0);//秒数设置为0
mDateTimePicker.setCurrentDate(mDate.getTimeInMillis());//选择器设置当前时间
setButton(context.getString(R.string.datetime_dialog_ok), this);//设置按钮
setButton2(context.getString(R.string.datetime_dialog_cancel), (OnClickListener)null);//设置按钮
set24HourView(DateFormat.is24HourFormat(this.getContext()));//设置日期是24小时制
updateTitle(mDate.getTimeInMillis());//更新显示日期
}
public void set24HourView(boolean is24HourView) {
mIs24HourView = is24HourView;
}
public void setOnDateTimeSetListener(OnDateTimeSetListener callBack) {
mOnDateTimeSetListener = callBack;
}
//用于格式日期显示
private void updateTitle(long date) {
int flag =
DateUtils.FORMAT_SHOW_YEAR |
DateUtils.FORMAT_SHOW_DATE |
DateUtils.FORMAT_SHOW_TIME;
flag |= mIs24HourView ? DateUtils.FORMAT_24HOUR : DateUtils.FORMAT_24HOUR;//DateUtils类日期格式工具类
setTitle(DateUtils.formatDateTime(this.getContext(), date, flag));
}
//响应用户点击设置按钮
public void onClick(DialogInterface arg0, int arg1) {
if (mOnDateTimeSetListener != null) {
mOnDateTimeSetListener.OnDateTimeSet(this, mDate.getTimeInMillis());
}
}
}