Android UI控件系列：DatePicker,TimePicker（日期和时间选择）

日期和时间是任何手机平台都有的功能，Android也如此。

DatePicker：用来实现日期（年月日）

TimePicker：用来实现时间（时分秒）
Calendar：日历是设定年度日期对象和一个整数字段之间转换的抽象基类，如，月，日，小时等。

例如

final Calendar calendar=Calendar.getInstance();
mYear=calendar.get(Calendar.YEAR);—获取年份
mMonth=calendar.get(Calendar.MONTH);—获取月份
mDay=calendar.get(Calendar.DAY_OF_MONTH);—获取日
mHour=calendar.get(Calendar.HOUR_OF_DAY);—获取时
mMinute=calendar.get(Calendar.MINUTE);—获取分

等等，可以参考API文档

TimePickerDialog、DatePickerDialog是对话框形式的时间类。

废话不多说，实例如下：

DateTest.java文件

package org.loulijun.datetest;

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.Button;
import android.widget.DatePicker;
import android.widget.TextView;
import android.widget.TimePicker;

public class DateTest extends Activity {
    /** Called when the activity is first created. */
        TextView textview;
        TimePicker timepicker;
        DatePicker datepicker;
        Button btn1;
        Button btn2;
        //JAVA中的Calendar类
        Calendar c;
    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.main);
        /*Like other locale-sensitive classes, Calendar provides a class method, getInstance,
        *for getting a default instance of this class for general use.
        *Calendar's getInstance method returns a calendar whose locale is based on system settings
        *and whose time fields have been initialized with the current date and time:
        */
        c=Calendar.getInstance();
        textview=(TextView)findViewById(R.id.textview);
        btn1=(Button)findViewById(R.id.button1);
        btn2=(Button)findViewById(R.id.button2);

        //获取DatePicker对象
        datepicker=(DatePicker)findViewById(R.id.datepicker1);
        //将日历初始化为当前系统时间，并设置其事件监听
        datepicker.init(c.get(Calendar.YEAR),c.get(Calendar.MONTH),c.get(Calendar.DAY_OF_MONTH),
                        new DatePicker.OnDateChangedListener() {

                                        @Override
                                        public void onDateChanged(DatePicker view, int year, int monthOfYear,
                                                        int dayOfMonth) {
                                                // TODO Auto-generated method stub
                                                //当前日期更改时，在这里设置
                                                c.set(year,monthOfYear,dayOfMonth);
                                        }
                                });
        //获取TimePicker对象
        timepicker=(TimePicker)findViewById(R.id.timepicker1);
        //设置为24小时制显示时间
        timepicker.setIs24HourView(true);
        //监听时间改变
        timepicker.setOnTimeChangedListener(new TimePicker.OnTimeChangedListener() {

                        @Override
                        public void onTimeChanged(TimePicker view, int hourOfDay, int minute) {
                                // TODO Auto-generated method stub
                                //时间改变处理
                                //c.set(year,month,hourOfDay,minute,second);
                        }
                });

        btn1.setOnClickListener(new Button.OnClickListener()
        {
                        @Override
                        public void onClick(View v) {
                                // TODO Auto-generated method stub
                                new DatePickerDialog(DateTest.this,
                                                new DatePickerDialog.OnDateSetListener() {

                                                        @Override
                                                        public void onDateSet(DatePicker view, int year, int monthOfYear,
                                                                        int dayOfMonth) {
                                                                        //设置日历
                                                        }
                                                },c.get(Calendar.YEAR),c.get(Calendar.MONTH),c.get(Calendar.DAY_OF_MONTH)).show();
                        }
        });

        btn2.setOnClickListener(new Button.OnClickListener()
        {

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

                                                        @Override
                                                        public void onTimeSet(TimePicker view, int hourOfDay, int minute) {
                                                                // TODO Auto-generated method stub
                                                                //设置时间
                                                        }
                                                },c.get(Calendar.HOUR_OF_DAY),c.get(Calendar.MINUTE),true).show();
                        }

        });
    }
}

main.xml文件

<?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:id="@+id/textview"
    android:layout_width="fill_parent"
    android:layout_height="wrap_content"
    android:text="时间控件使用"
    />
<DatePicker
        android:id="@+id/datepicker1"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
/>
<TimePicker
        android:id="@+id/timepicker1"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
/>
<Button
        android:id="@+id/button1"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="设置日期"
        android:layout_gravity="center"
/>
<Button
        android:id="@+id/button2"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="设置时间"
        android:layout_gravity="center"
/>
</LinearLayout>

运行结果如下：

当点击“设置日期”按钮后，就会显示如下对话框样式的DatePickerDialog

当点击“设置时间”按钮后，就会弹出如下对话框样式的TimePickerDialog

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