android学习：日期与时间（DatePicker和TimePicker）

package com.example.examples_04_11;

import java.util.Calendar;

import android.app.Activity;
import android.app.DatePickerDialog;
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.DatePicker.OnDateChangedListener;
import android.widget.TextView;
import android.widget.TimePicker;
import android.widget.TimePicker.OnTimeChangedListener;

public class MainActivity extends Activity {

private TextView m_TextView;
private DatePicker m_DatePicker;
private TimePicker m_TimePicker;
private Button m_dpButton, m_tpButton;
private Calendar m_Calendar;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);

m_Calendar = Calendar.getInstance();
m_TextView = (TextView)findViewById(R.id.TextView01);
m_dpButton = (Button)findViewById(R.id.button1);
m_tpButton = (Button)findViewById(R.id.button2);

m_DatePicker = (DatePicker)findViewById(R.id.DatePicker01);
//将日历初始化为当前的系统时间，并设置其事件监听
m_DatePicker.init(m_Calendar.get(Calendar.YEAR), m_Calendar.get(Calendar.MONTH),
m_Calendar.get(Calendar.DAY_OF_MONTH), new OnDateChangedListener() {

@Override
public void onDateChanged(DatePicker view, int year, int monthOfYear,
int dayOfMonth) {
// TODO Auto-generated method stub
m_Calendar.set(year, monthOfYear, dayOfMonth);
}
});

m_TimePicker = (TimePicker)findViewById(R.id.TimePicker01);
m_TimePicker.setIs24HourView(true);
//监听时间改变
m_TimePicker.setOnTimeChangedListener(new OnTimeChangedListener() {

@Override
public void onTimeChanged(TimePicker view, int hourOfDay, int minute) {
// TODO Auto-generated method stub
//m_Calendar.set(year, month, day, hourOfDay, minute, second);
}
});

m_dpButton.setOnClickListener(new OnClickListener() {

@Override
public void onClick(View v) {
// TODO Auto-generated method stub
new DatePickerDialog(MainActivity.this,
new DatePickerDialog.OnDateSetListener() {

@Override
public void onDateSet(DatePicker view, int year, int monthOfYear,
int dayOfMonth) {
// TODO Auto-generated method stub

}
},m_Calendar.get(Calendar.YEAR), m_Calendar.get(Calendar.MONTH),
m_Calendar.get(Calendar.DAY_OF_MONTH)).show();

}
});

m_tpButton.setOnClickListener(new OnClickListener() {

@Override
public void onClick(View v) {
// TODO Auto-generated method stub
new TimePickerDialog(MainActivity.this,
new OnTimeSetListener() {

@Override
public void onTimeSet(TimePicker view, int hourOfDay, int minute) {
// 设置时间

}
}, m_Calendar.get(Calendar.HOUR_OF_DAY), m_Calendar.get(Calendar.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;
}

}

<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" >

<TextView
android:id="@+id/TextView01"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:text="@string/hello_world" />
<DatePicker
android:id="@+id/DatePicker01"
android:layout_below="@id/TextView01"
android:layout_width="wrap_content"
android:layout_height="wrap_content"/>
<TimePicker
android:id="@+id/TimePicker01"
android:layout_below="@id/DatePicker01"
android:layout_width="wrap_content"
android:layout_height="wrap_content"/>
<Button
android:id="@+id/button1"
android:layout_below="@id/TimePicker01"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="设置日期"/>
<Button
android:id="@+id/button2"
android:layout_below="@id/button1"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="设置时间"/>

</RelativeLayout>