（1）布局文件

<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:paddingBottom="@dimen/activity_vertical_margin"
    android:paddingLeft="@dimen/activity_horizontal_margin"
    android:paddingRight="@dimen/activity_horizontal_margin"
    android:paddingTop="@dimen/activity_vertical_margin"
    tools:context=".MainActivity" >

    <Button
        android:id="@+id/button2"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_alignParentTop="true"
        android:layout_centerHorizontal="true"
        android:layout_marginTop="156dp"
        android:text="时间对话框" />

    <Button
        android:id="@+id/button1"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_alignLeft="@+id/button2"
        android:layout_below="@+id/button2"
        android:layout_marginTop="14dp"
        android:text="日期对话框" />

    <EditText
        android:id="@+id/editText1"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_alignParentTop="true"
        android:layout_marginTop="41dp"
        android:ems="10" >

        <requestFocus />
    </EditText>

</RelativeLayout>

package com.example.date_time_dailog;

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.view.Menu;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
import android.widget.DatePicker;
import android.widget.EditText;
import android.widget.TimePicker;
import android.widget.Toast;

public class MainActivity extends Activity {
	private Button button1;
	private Button button2;
	private EditText editText;
	private DatePickerDialog datePickerDialog; // 日期对话框
	private int year, monthOfYear, dayOfMonth, hourOfDay, minute;
	private TimePickerDialog timePickerDialog;// 时间对话框

	@Override
	protected void onCreate(Bundle savedInstanceState) {
		super.onCreate(savedInstanceState);
		setContentView(R.layout.activity_main);
		button1 = (Button) this.findViewById(R.id.button1);
		button2 = (Button) this.findViewById(R.id.button2);
		editText = (EditText) this.findViewById(R.id.editText1);

		/*
		 * 获取当前的日期及时间
		 */
		Calendar calendar = Calendar.getInstance();
		year = calendar.get(Calendar.YEAR);
		monthOfYear = calendar.get(Calendar.MONTH) + 1;
		dayOfMonth = calendar.get(Calendar.DAY_OF_MONTH);
		hourOfDay = calendar.get(Calendar.HOUR_OF_DAY);
		minute = calendar.get(Calendar.MINUTE);

		/*
		 * 对日期选择器进行设置
		 */
		datePickerDialog = new DatePickerDialog(this, new OnDateSetListener() {

			@Override
			public void onDateSet(DatePicker view, int year, int monthOfYear,
					int dayOfMonth) {
				String text = year + "-" + monthOfYear + "-" + dayOfMonth;
				editText.setText(text);
			}
		}, year, monthOfYear, dayOfMonth);
		button1.setOnClickListener(new OnClickListener() {

			@Override
			public void onClick(View v) {
				datePickerDialog.show();
			}
		});

		/*
		 * 时间选择器的设置
		 */
		timePickerDialog = new TimePickerDialog(MainActivity.this,
				new OnTimeSetListener() {

					@Override
					public void onTimeSet(TimePicker view, int hourOfDay,
							int minute) {
						String text = hourOfDay + ":" + minute;
						editText.setText(text);
					}
				}, hourOfDay, minute, true);
		button2.setOnClickListener(new OnClickListener() {

			@Override
			public void onClick(View v) {
				timePickerDialog.show();
			}
		});
	}

	@Override
	public boolean onCreateOptionsMenu(Menu menu) {
		getMenuInflater().inflate(R.menu.main, menu);
		return true;
	}

}

【Android学习笔记】DatePickerDialog和TimePickerDialog日期选择器和时间选择器