使用DatePicker和TimePicker显示当前日期和时间

<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="com.example.datetinepicker.MainActivity" >

<TimePicker
android:id="@+id/timePicker1"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentLeft="true"
android:layout_alignParentTop="true"
android:layout_marginLeft="15dp" />

<DatePicker
android:id="@+id/datePicker1"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentBottom="true"
android:layout_alignParentLeft="true" />

</RelativeLayout>

package com.example.datetinepicker;

import java.util.Calendar;

import android.R.integer;
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.MenuItem;
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 calendar;
private int year;
private int month;
private int date;
private int hour;
private int minute;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
//获取日历的一个对象
calendar=Calendar.getInstance();
//获取年月日时分秒的信息
year=calendar.get(Calendar.YEAR);
month=calendar.get(Calendar.MONTH)+1;
date=calendar.get(Calendar.DAY_OF_MONTH);
hour=calendar.get(Calendar.HOUR_OF_DAY);
minute=calendar.get(Calendar.MINUTE);
setTitle(year+"/"+month+"/"+date+"-"+hour+":"+minute);
datePicker=(DatePicker) findViewById(R.id.datePicker1);
timePicker=(TimePicker) findViewById(R.id.timePicker1);
datePicker.init(year, calendar.get(Calendar.MONTH), date,new OnDateChangedListener() {

@Override
public void onDateChanged(DatePicker view, int year, int monthOfYear,
int dayOfMonth) {
// TODO Auto-generated method stub
setTitle(year+"/"+(monthOfYear+1)+"/"+dayOfMonth);
}
});
timePicker.setOnTimeChangedListener(new OnTimeChangedListener() {

@Override
public void onTimeChanged(TimePicker view, int hourOfDay, int minute) {
// TODO Auto-generated method stub
setTitle(hourOfDay+":"+minute);
}
});
// new DatePickerDialog(this,new OnDateSetListener() {
//
// @Override
// public void onDateSet(DatePicker view, int year, int monthOfYear,
// int dayOfMonth) {
// // TODO Auto-generated method stub
// setTitle(year+"/"+(monthOfYear+1)+"/"+dayOfMonth);
// }
// }, year, calendar.get(Calendar.MONTH), date).show();
new TimePickerDialog(this,new OnTimeSetListener() {

@Override
public void onTimeSet(TimePicker view, int hourOfDay, int minute) {
// TODO Auto-generated method stub
setTitle(hourOfDay+":"+minute);
}
}, hour, minute, true).show();
}

@Override
public boolean onCreateOptionsMenu(Menu menu) {
// Inflate the menu; this adds items to the action bar if it is present.
getMenuInflater().inflate(R.menu.main, menu);
return true;
}

@Override
public boolean onOptionsItemSelected(MenuItem item) {
// Handle action bar item clicks here. The action bar will
// automatically handle clicks on the Home/Up button, so long
// as you specify a parent activity in AndroidManifest.xml.
int id = item.getItemId();
if (id == R.id.action_settings) {
return true;
}
return super.onOptionsItemSelected(item);
}
}