控件DatePicker和TimePicker
对话框DatePickerDialog和TimePickerDialog

给出demo:
activity_main.xml

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:orientation="vertical" >

    <DatePicker
        android:id="@+id/datePicker1"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content" />
    <TimePicker
        android:id="@+id/timePicker1"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"/>

</LinearLayout>

MainActivity.java

package com.example.day101802;

import java.util.Calendar;

import android.app.Activity;
import android.app.DatePickerDialog;
import android.app.DatePickerDialog.OnDateSetListener;
import android.app.TimePickerDialog;
import android.app.TimePickerDialog.OnTimeSetListener;
import android.os.Bundle;
import android.widget.DatePicker;
import android.widget.DatePicker.OnDateChangedListener;
import android.widget.TimePicker;
import android.widget.TimePicker.OnTimeChangedListener;

public class MainActivity extends Activity {

    private DatePicker datePicker;
    private TimePicker timePicker;
    private Calendar cal;
    private int year;
    private int month;
    private int day;
    private int hour;
    private int minute;
    
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);

        datePicker = (DatePicker) findViewById(R.id.datePicker1);
        timePicker = (TimePicker) findViewById(R.id.timePicker1);
        cal  = Calendar.getInstance();
        year = cal.get(Calendar.YEAR);
        month = cal.get(Calendar.MONTH)+1;//month从0开始
        day = cal.get(Calendar.DAY_OF_MONTH);
        hour = cal.get(Calendar.HOUR);
        minute = cal.get(Calendar.MINUTE);
        
        //默认标题时间
        setTitle(year+"-"+month+"-"+day+" "+hour+":"+minute);
//        datePicker.init(year, cal.get(Calendar.MONTH), day, new OnDateChangedListener() {
//          
//          @Override
//          public void onDateChanged(DatePicker datePicker, int year, int month, int day) {
//
//              //改变后，里面变量为形参
//              setTitle(year+"-"+(month+1)+"-"+day+" "+hour+":"+minute);
//              
//          }
//      });
        //对话框方式
        new DatePickerDialog(this, new OnDateSetListener() {
            
            @Override
            public void onDateSet(DatePicker datePicker, int year, int month, int day) {
                // TODO Auto-generated method stub
                setTitle(year+"-"+(month+1)+"-"+day+" "+hour+":"+minute);
            }
        }, year, cal.get(Calendar.MONTH), day).show();
        
        
//        timePicker.setOnTimeChangedListener(new OnTimeChangedListener() {
//          
//          @Override
//          public void onTimeChanged(TimePicker timePicker, int hour, int minute) {
//              
//              //改变后，里面变量为形参
//              setTitle(year+"-"+(month+1)+"-"+day+" "+hour+":"+minute);
//              
//          }
//      });
        
        new TimePickerDialog(this, new OnTimeSetListener() {
            
            @Override
            public void onTimeSet(TimePicker timePicker, int hour, int minute) {
                // TODO Auto-generated method stub
                setTitle(year+"-"+(month+1)+"-"+day+" "+hour+":"+minute);
            }
        }, hour, minute,true).show();
    }
}

控件演示效果：

dt1.gif

对话框演示效果：

dt2.gif