Android控件之DatePicker、TimePicker探究

一、DatePicker继承自FrameLayout类,日期选择控件的主要功能是向用户提供包含年、月、日的日期数据并允许用户对其修改。如果要捕获用户修改日期选择控件中的数据事件,需要为DatePicker添加OnDateChangedListener监听器。

二、TimePicker也继承自FrameLayout类。时间选择控件向用户显示一天中的时间(可以为24小时,也可以为AM/PM制),并允许用户进行选择。如果要捕获用户修改时间数据的事件,便需要为TimePicker添加OnTimeChangedListener监听器

以下模拟日期与时间选择控件的用法

目录结构

main.xml布局文件

<?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">
<DatePicker android:id="@+id/datePicker"
android:layout_width
="wrap_content"
android:layout_height
="wrap_content"
android:layout_gravity
="center_horizontal"/>
<EditText android:id="@+id/dateEt"
android:layout_width
="fill_parent"
android:layout_height
="wrap_content"
android:cursorVisible
="false"
android:editable
="false"/>
<TimePicker android:id="@+id/timePicker"
android:layout_width
="wrap_content"
android:layout_height
="wrap_content"
android:layout_gravity
="center_horizontal"/>
<EditText android:id="@+id/timeEt"
android:layout_width
="fill_parent"
android:layout_height
="wrap_content"
android:cursorVisible
="false"
android:editable
="false"/>
</LinearLayout>

DpTpActivity类

package com.ljq.activity;

import java.util.Calendar;

import android.app.Activity;
import android.os.Bundle;
import android.widget.DatePicker;
import android.widget.EditText;
import android.widget.TimePicker;
import android.widget.DatePicker.OnDateChangedListener;
import android.widget.TimePicker.OnTimeChangedListener;

public class DpTpActivity extends Activity {
private EditText dateEt=null;
private EditText timeEt=null;

@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
dateEt
=(EditText)findViewById(R.id.dateEt);
timeEt
=(EditText)findViewById(R.id.timeEt);
DatePicker datePicker
=(DatePicker)findViewById(R.id.datePicker);
TimePicker timePicker
=(TimePicker)findViewById(R.id.timePicker);

Calendar calendar
=Calendar.getInstance();
int year=calendar.get(Calendar.YEAR);
int monthOfYear=calendar.get(Calendar.MONTH);
int dayOfMonth=calendar.get(Calendar.DAY_OF_MONTH);
datePicker.init(year, monthOfYear, dayOfMonth,
new OnDateChangedListener(){

public void onDateChanged(DatePicker view, int year,
int monthOfYear, int dayOfMonth) {
dateEt.setText(
"您选择的日期是:"+year+""+(monthOfYear+1)+""+dayOfMonth+"日。");
}

});

timePicker.setOnTimeChangedListener(
new OnTimeChangedListener(){

public void onTimeChanged(TimePicker view, int hourOfDay, int minute) {
timeEt.setText(
"您选择的时间是:"+hourOfDay+""+minute+"分。");
}

});
}
}

运行结果

posted on 2011-02-21 21:54  Ruthless  阅读(57540)  评论(2编辑  收藏  举报