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

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>

MyList.java类:

package iaiai.test;

import java.util.Calendar;

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

public class MyList extends Activity {

  private EditText dateEt;
  private EditText timeEt;

  @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 + "年"
                + (monthOfYear + 1) + "月" + dayOfMonth + "日。");
          }

        });

    timePicker.setIs24HourView(true); // 设置是否是24小时显示方式
    timePicker.setOnTimeChangedListener(new OnTimeChangedListener() {

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

    });
  }

}

运行结果:

[img]http://dl.iteye.com/upload/attachment/490486/4fec7b0b-4a6e-3605-97b6-d31611544d77.jpg[/img]