Android之日期及时间选择对话框用法实例分析

<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
 package="com.ljq.dialog"
 android:versioncode="1"
 android:versionname="1.0">
 <application android:icon="@drawable/icon" android:label="@string/app_name">
 <activity android:name=".alertdialog"
   android:label="@string/app_name">
  <intent-filter>
  <action android:name="android.intent.action.main" />
  <category android:name="android.intent.category.launcher" />
  </intent-filter>
 </activity>
 </application>
 <uses-sdk android:minsdkversion="7" />
 <uses-permission android:name="android.permission.write_calendar" />
</manifest> 

<?xml version="1.0" encoding="utf-8"?>
<linearlayout android:id="@+id/linearlayout01"
 android:layout_width="fill_parent" android:layout_height="fill_parent"
 android:orientation="vertical"
 xmlns:android="http://schemas.android.com/apk/res/android">
 <edittext android:id="@+id/et" 
 android:layout_width="fill_parent"
 android:layout_height="wrap_content" 
 android:editable="false"
 android:cursorvisible="false" />
 <button android:text="日期对话框" 
 android:id="@+id/datebtn"
 android:layout_width="fill_parent"
 android:layout_height="wrap_content" />
 <button android:text="时间对话框" 
 android:id="@+id/timebtn"
 android:layout_width="fill_parent"
 android:layout_height="wrap_content" />
 <digitalclock 
 android:text="@+id/digitalclock"
 android:textsize="20dip" 
 android:gravity="center"
 android:id="@+id/digitalclock01" 
 android:layout_width="fill_parent"
 android:layout_height="wrap_content" />
 <analogclock 
 android:id="@+id/analogclock"
 android:gravity="center" 
 android:layout_width="fill_parent"
 android:layout_height="wrap_content" />
</linearlayout>

package com.ljq.dialog;
import java.util.calendar;
import android.app.activity;
import android.app.datepickerdialog;
import android.app.dialog;
import android.app.timepickerdialog;
import android.os.bundle;
import android.view.view;
import android.widget.button;
import android.widget.datepicker;
import android.widget.edittext;
import android.widget.timepicker;
public class alertdialog extends activity {
 private button datebtn = null;
 private button timebtn = null;
 private edittext et=null;
 private final static int date_dialog = 0;
 private final static int time_dialog = 1;
 private calendar c = null;
 @override
 public void oncreate(bundle savedinstancestate) {
 super.oncreate(savedinstancestate);
 setcontentview(r.layout.main);
 et=(edittext)findviewbyid(r.id.et);
 datebtn = (button) findviewbyid(r.id.datebtn);
 timebtn = (button) findviewbyid(r.id.timebtn);
 datebtn.setonclicklistener(new view.onclicklistener(){
  public void onclick(view v) {
  showdialog(date_dialog);
  }
 });
 timebtn.setonclicklistener(new view.onclicklistener(){
  public void onclick(view v) {
  showdialog(time_dialog);
  }
 });
 }
 /**
 * 创建日期及时间选择对话框
 */
 @override
 protected dialog oncreatedialog(int id) {
 dialog dialog = null;
 switch (id) {
 case date_dialog:
  c = calendar.getinstance();
  dialog = new datepickerdialog(
  this,
  new datepickerdialog.ondatesetlistener() {
   public void ondateset(datepicker dp, int year,int month, int dayofmonth) {
   et.settext("您选择了：" + year + "年" + (month+1) + "月" + dayofmonth + "日");
   }
  }, 
  c.get(calendar.year), // 传入年份
  c.get(calendar.month), // 传入月份
  c.get(calendar.day_of_month) // 传入天数
  );
  break;
 case time_dialog:
  c=calendar.getinstance();
  dialog=new timepickerdialog(
  this, 
  new timepickerdialog.ontimesetlistener(){
   public void ontimeset(timepicker view, int hourofday, int minute) {
   et.settext("您选择了："+hourofday+"时"+minute+"分");
   }
  },
  c.get(calendar.hour_of_day),
  c.get(calendar.minute),
  false
  );
  break;
 }
 return dialog;
 }
}