日期时间控件的使用

 1 经常用到日期时间控件选择日期和时间：

 java代码：

package com.example.fragmentdemo1;

import java.util.Calendar;

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

/**
 * 日期和时间控件的使用与测试 
 * @author root
 * 参考 ： http://www.cnblogs.com/menlsh/archive/2013/02/23/2923867.html
 *
 */
public class DateTimeActivity extends Activity {
	
 
	
	private EditText showDate = null;
	private EditText showTime = null;
	
    private static final int DATE_DIALOG_ID = 1;  
    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.date_time);
        
        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);  
        showTime = (EditText)findViewById(R.id.showtime);
    }

    /**
     * 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)); 
	}
	
	/**
	 * 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)); 
	}
    
//    @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;
//       }
//    }  
//    
    /*
     * Function  :        Button按钮响应
     * Param         :        v按钮对象
     */
    public void onClick(View v) {
        switch (v.getId()) {
        case R.id.pickdate:
            MyDatePickerDialog myDatePickerDialog = new MyDatePickerDialog();
            DatePickerDialog datePickerDialog = new DatePickerDialog(this, 
                    myDatePickerDialog,mYear, mMonth, mDay);
            datePickerDialog.show();                //显示日期设置对话框
            break;
        case R.id.picktime:
            MyTimePickerDialog myTimePickerDialog = new MyTimePickerDialog();
            TimePickerDialog timePickerDialog = new TimePickerDialog(this, 
                    myTimePickerDialog, mHour, mMinute, true);
            timePickerDialog.show();            //显示时间设置对话框
            break;
        }
    }
    
    /*
     * Function  :       自定义MyDatePickerDialog类，用于实现DatePickerDialog.OnDateSetListener接口，
     *                           当点击日期设置对话框中的“设置”按钮时触发该接口方法
     */
    public class MyDatePickerDialog implements DatePickerDialog.OnDateSetListener {
        public void onDateSet(DatePicker view, int year, int monthOfYear, int dayOfMonth) {
            mYear = year;  
            mMonth = monthOfYear;  
            mDay = dayOfMonth;  
            
            updateDateDisplay(); 
        }
    }    
     
    /*
     * Function  :       自定义MyTimePickerDialog类，用于实现TimePickerDialog.OnTimeSetListener接口，
     *                           当点击时间设置对话框中的“设置”按钮时触发该接口方法
     */
    public class MyTimePickerDialog implements TimePickerDialog.OnTimeSetListener {
        public void onTimeSet(TimePicker view, int hourOfDay, int minute) {

			mHour = hourOfDay;
			mMinute = minute;
			updateTimeDisplay();
 
        }        
    }
    
}

 2 使用的xml

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="fill_parent"
    android:layout_height="fill_parent"
    android:orientation="vertical" >

    <TextView
        android:layout_width="fill_parent"
        android:layout_height="wrap_content"
        android:gravity="center"
        android:text="欢迎" />

    <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" />

    <LinearLayout
        android:layout_width="fill_parent"
        android:layout_height="wrap_content"
        android:orientation="horizontal" >

        <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" android:onClick="onClick"/>
    </LinearLayout>

    <LinearLayout
        android:layout_width="fill_parent"
        android:layout_height="wrap_content"
        android:orientation="horizontal" >

        <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" android:onClick="onClick"/>
    </LinearLayout>

</LinearLayout>