Android中日期和时间控件的使用

本文主要讲述Android中的日期控件和时间控件的使用，以一个Demo的例子来展示日期和时间控件的使用，先看下如下效果图：

从效果图中可以看到该Demo是通过单击【选择日期】按钮和【选择时间】按钮弹出日期或者时间的对话框，然后设置日期或者时间，设置完成后会在文本框中显示设置的日期或时间值。

【1】Demo程序框架图：

【2】布局文件 res/layout/main.xml 源码：

<?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:layout_width="fill_parent" android:layout_height="wrap_content" 
       android:gravity="center" android:text="欢迎关注Andy.Chen Blog" /> 
    <TextView 
       android:layout_width="fill_parent" android:layout_height="wrap_content" 
       android:gravity="center" android:text="日期和时间控件的使用DEMO" />  
  
    <LinearLayout android:orientation="horizontal"  
       android:layout_width="fill_parent" android:layout_height="wrap_content">  

       <EditText android:id="@+id/showdate" android:layout_width="fill_parent"  
           android:layout_height="wrap_content" android:layout_weight="1"/>  
       <Button android:id="@+id/pickdate" android:layout_width="wrap_content"  
           android:layout_height="wrap_content" android:text="选择日期"/>  
  
    </LinearLayout> 
    
    <LinearLayout android:orientation="horizontal"  
       android:layout_width="fill_parent" android:layout_height="wrap_content">  

       <EditText android:id="@+id/showtime" android:layout_width="fill_parent"  
           android:layout_height="wrap_content" android:layout_weight="1"/>  
       <Button android:id="@+id/picktime" android:layout_width="wrap_content"  
           android:layout_height="wrap_content" android:text="选择时间"/>  
  
    </LinearLayout> 
</LinearLayout>

【3】包com.andyidea.calenderdemo下MainActivity.java源码：

package com.andyidea.calenderdemo;

import java.util.Calendar;

import android.app.Activity;
import android.app.DatePickerDialog;
import android.app.Dialog;
import android.app.TimePickerDialog;
import android.os.Bundle;
import android.os.Handler;
import android.os.Message;
import android.view.View;
import android.widget.Button;
import android.widget.DatePicker;
import android.widget.EditText;
import android.widget.TimePicker;

public class MainActivity extends Activity {
	
	private EditText showDate = null;
	private Button pickDate = null;
	private EditText showTime = null;
	private Button pickTime = null;
	
	private static final int SHOW_DATAPICK = 0; 
    private static final int DATE_DIALOG_ID = 1;  
    private static final int SHOW_TIMEPICK = 2;
    private static final int TIME_DIALOG_ID = 3;
    
    private int mYear;  
    private int mMonth;
    private int mDay; 
    private int mHour;
    private int mMinute;
	
    /** Called when the activity is first created. */
    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.main);
        
        initializeViews();
        
        final Calendar c = Calendar.getInstance();
        mYear = c.get(Calendar.YEAR);  
        mMonth = c.get(Calendar.MONTH);  
        mDay = c.get(Calendar.DAY_OF_MONTH);
        
        mHour = c.get(Calendar.HOUR_OF_DAY);
        mMinute = c.get(Calendar.MINUTE);
        
        setDateTime(); 
        setTimeOfDay();
    }
    
    /**
     * 初始化控件和UI视图
     */
    private void initializeViews(){
        showDate = (EditText) findViewById(R.id.showdate);  
        pickDate = (Button) findViewById(R.id.pickdate); 
        showTime = (EditText)findViewById(R.id.showtime);
        pickTime = (Button)findViewById(R.id.picktime);
        
        pickDate.setOnClickListener(new View.OnClickListener() {
			
			@Override
			public void onClick(View v) {
	           Message msg = new Message(); 
	           if (pickDate.equals((Button) v)) {  
	              msg.what = MainActivity.SHOW_DATAPICK;  
	           }  
	           MainActivity.this.dateandtimeHandler.sendMessage(msg); 
			}
		});
        
        pickTime.setOnClickListener(new View.OnClickListener() {
			
			@Override
			public void onClick(View v) {
	           Message msg = new Message(); 
	           if (pickTime.equals((Button) v)) {  
	              msg.what = MainActivity.SHOW_TIMEPICK;  
	           }  
	           MainActivity.this.dateandtimeHandler.sendMessage(msg); 
			}
		});
    }

    /**
     * 设置日期
     */
	private void setDateTime(){
       final Calendar c = Calendar.getInstance();  
       
       mYear = c.get(Calendar.YEAR);  
       mMonth = c.get(Calendar.MONTH);  
       mDay = c.get(Calendar.DAY_OF_MONTH); 
  
       updateDateDisplay(); 
	}
	
	/**
	 * 更新日期显示
	 */
	private void updateDateDisplay(){
       showDate.setText(new StringBuilder().append(mYear).append("-")
    		   .append((mMonth + 1) < 10 ? "0" + (mMonth + 1) : (mMonth + 1)).append("-")
               .append((mDay < 10) ? "0" + mDay : mDay)); 
	}
	
    /** 
     * 日期控件的事件 
     */  
    private DatePickerDialog.OnDateSetListener mDateSetListener = new DatePickerDialog.OnDateSetListener() {  
  
       public void onDateSet(DatePicker view, int year, int monthOfYear,  
              int dayOfMonth) {  
           mYear = year;  
           mMonth = monthOfYear;  
           mDay = dayOfMonth;  

           updateDateDisplay();
       }  
    }; 
	
	/**
	 * 设置时间
	 */
	private void setTimeOfDay(){
	   final Calendar c = Calendar.getInstance(); 
       mHour = c.get(Calendar.HOUR_OF_DAY);
       mMinute = c.get(Calendar.MINUTE);
       updateTimeDisplay();
	}
	
	/**
	 * 更新时间显示
	 */
	private void updateTimeDisplay(){
       showTime.setText(new StringBuilder().append(mHour).append(":")
               .append((mMinute < 10) ? "0" + mMinute : mMinute)); 
	}
    
    /**
     * 时间控件事件
     */
    private TimePickerDialog.OnTimeSetListener mTimeSetListener = new TimePickerDialog.OnTimeSetListener() {
		
		@Override
		public void onTimeSet(TimePicker view, int hourOfDay, int minute) {
			mHour = hourOfDay;
			mMinute = minute;
			
			updateTimeDisplay();
		}
	};
    
    @Override  
    protected Dialog onCreateDialog(int id) {  
       switch (id) {  
       case DATE_DIALOG_ID:  
           return new DatePickerDialog(this, mDateSetListener, mYear, mMonth,  
                  mDay);
       case TIME_DIALOG_ID:
    	   return new TimePickerDialog(this, mTimeSetListener, mHour, mMinute, true);
       }
    	   
       return null;  
    }  
  
    @Override  
    protected void onPrepareDialog(int id, Dialog dialog) {  
       switch (id) {  
       case DATE_DIALOG_ID:  
           ((DatePickerDialog) dialog).updateDate(mYear, mMonth, mDay);  
           break;
       case TIME_DIALOG_ID:
    	   ((TimePickerDialog) dialog).updateTime(mHour, mMinute);
    	   break;
       }
    }  
  
    /** 
     * 处理日期和时间控件的Handler 
     */  
    Handler dateandtimeHandler = new Handler() {
  
       @Override  
       public void handleMessage(Message msg) {  
           switch (msg.what) {  
           case MainActivity.SHOW_DATAPICK:  
               showDialog(DATE_DIALOG_ID);  
               break; 
           case MainActivity.SHOW_TIMEPICK:
        	   showDialog(TIME_DIALOG_ID);
        	   break;
           }  
       }  
  
    }; 
    
}

【4】程序运行效果图：