1、日期设置控件：DatePickerDialog

2、时间设置控件：TimePickerDialog

实例代码

1、页面添加两个Button，单击分别显示日期设置控件和时间设置控件，还是有TextView控件，用于显示设置后的系统时间

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:Android="http://schemas.android.com/apk/res/android"Android:orientation="vertical"Android:layout_width="fill_parent"Android:layout_height="fill_parent">
<TextView  Android:id="@+id/dateAndTime"Android:layout_width="fill_parent"Android:layout_height="wrap_content"Android:text="@string/hello"/>
<Button    Android:id="@+id/setDate"Android:layout_width="fill_parent"Android:layout_height="wrap_content"Android:text="Set the Date"></Button>
<Button    Android:id="@+id/setTime"Android:layout_width="fill_parent"Android:layout_height="wrap_content"Android:text="Set the Time"></Button>
</LinearLayout>

package yyl.Android;import java.text.DateFormat;
import java.util.Calendar;
import java.util.Locale;import Android.app.Activity;
import Android.app.DatePickerDialog;
import Android.app.TimePickerDialog;
import Android.os.Bundle;
import Android.view.View;
import Android.widget.Button;
import Android.widget.DatePicker;
import Android.widget.TextView;
import Android.widget.TimePicker;public class ChronoDemo extends Activity {//获取日期格式器对象DateFormat fmtDateAndTime = DateFormat.getDateTimeInstance();//定义一个TextView控件对象TextView dateAndTimeLabel = null;//获取一个日历对象Calendar dateAndTime = Calendar.getInstance(Locale.CHINA);//当点击DatePickerDialog控件的设置按钮时，调用该方法DatePickerDialog.OnDateSetListener d = new DatePickerDialog.OnDateSetListener(){@Overridepublic void onDateSet(DatePicker view, int year, int monthOfYear,int dayOfMonth) {//修改日历控件的年，月，日//这里的year,monthOfYear,dayOfMonth的值与DatePickerDialog控件设置的最新值一致dateAndTime.set(Calendar.YEAR, year);dateAndTime.set(Calendar.MONTH, monthOfYear);dateAndTime.set(Calendar.DAY_OF_MONTH, dayOfMonth);   //将页面TextView的显示更新为最新时间updateLabel();           }       };TimePickerDialog.OnTimeSetListener t = new TimePickerDialog.OnTimeSetListener() {//同DatePickerDialog控件@Overridepublic void onTimeSet(TimePicker view, int hourOfDay, int minute) {dateAndTime.set(Calendar.HOUR_OF_DAY, hourOfDay);dateAndTime.set(Calendar.MINUTE, minute);updateLabel();}};@Overridepublic void onCreate(Bundle savedInstanceState) {super.onCreate(savedInstanceState);setContentView(R.layout.main);//得到页面设定日期的按钮控件对象Button dateBtn = (Button)findViewById(R.id.setDate);//设置按钮的点击事件监听器dateBtn.setOnClickListener(new View.OnClickListener() {@Overridepublic void onClick(View v) {//生成一个DatePickerDialog对象，并显示。显示的DatePickerDialog控件可以选择年月日，并设置new DatePickerDialog(ChronoDemo.this,d,dateAndTime.get(Calendar.YEAR),dateAndTime.get(Calendar.MONTH),dateAndTime.get(Calendar.DAY_OF_MONTH)).show();               }});Button timeBtn = (Button)findViewById(R.id.setTime);timeBtn.setOnClickListener(new View.OnClickListener() {//同上原理@Overridepublic void onClick(View v) {new TimePickerDialog(ChronoDemo.this,t,dateAndTime.get(Calendar.HOUR_OF_DAY),dateAndTime.get(Calendar.MINUTE),true).show();}});dateAndTimeLabel=(TextView)findViewById(R.id.dateAndTime);updateLabel();}//更新页面TextView的方法private void updateLabel() {dateAndTimeLabel.setText(fmtDateAndTime.format(dateAndTime.getTime()));}
}

http://www.oschina.net/code/snippet_54100_5221