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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.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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/**
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* 日期选择器 界面
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* 将用户交互与日期选择器数据类对接
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* 并保存了一些基础信息，如当前日期、是否为24小时格式等
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* 也注册了相应的事件监听器
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*/
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public class DateTimePickerDialog extends AlertDialog implements OnClickListener {
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private Calendar mDate = Calendar.getInstance();
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private boolean mIs24HourView;
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private OnDateTimeSetListener mOnDateTimeSetListener;
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private DateTimePicker mDateTimePicker;
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// 为什么要在类里面声明公开接口还在其他类中使用？这样做并不规范
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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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// 构造方法
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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);
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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);
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updateTitle(mDate.getTimeInMillis());
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}
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});
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mDate.setTimeInMillis(date);
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mDate.set(Calendar.SECOND, 0);
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mDateTimePicker.setCurrentDate(mDate.getTimeInMillis());
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setButton(context.getString(R.string.datetime_dialog_ok), this);
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setButton2(context.getString(R.string.datetime_dialog_cancel), (OnClickListener) null);
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set24HourView(DateFormat.is24HourFormat(this.getContext()));
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updateTitle(mDate.getTimeInMillis());
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}
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// 设置为 24 小时的日期显示格式
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public void set24HourView(boolean is24HourView) {
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mIs24HourView = is24HourView;
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}
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// 初始化 OnDateTimeSetListener 监听器
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public void setOnDateTimeSetListener(OnDateTimeSetListener callBack) {
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mOnDateTimeSetListener = callBack;
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}
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// 更新弹出窗口标题
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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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}
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@Override
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public void onClick(DialogInterface arg0, int arg1) {
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if (mOnDateTimeSetListener != null) {
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// onClick 委托至 OnDateTimeSetListener
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mOnDateTimeSetListener.OnDateTimeSet(this, mDate.getTimeInMillis());
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}
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}
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} |
