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:
Android控件之DatePicker、TimePicker探究

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