阅读《Android 从入门到精通》（13）——日期选择器

Posted 2023-01-12 SweetLoverFT

日期选择器（DatePicker）

java.lang.Object;
android.view.View;
android.view.ViewGroup;
android.widget.FrameLayout;
android.widget.DataPicker;

DatePicker 类方法

DatePicker 示例

完整工程：http://download.csdn.net/detail/sweetloveft/9410380

下述程序主要学习 DatePicker 和 Calendar 的使用方法，需注意 Eclipse 似乎不能显示 DatePicker 的预览，但可以正常工作的，这一点已查阅 StackOverflow。

1.MainActivity.java

package com.sweetlover.activity;

import com.sweetlover.datepickerdemo.R;

import android.app.Activity;
import android.os.Bundle;
import android.widget.DatePicker;
import android.widget.DatePicker.OnDateChangedListener;
import android.widget.TextView;

public class MainActivity extends Activity 

	private TextView textView = null;
//	private Calendar calendar = null;	// 不使用 Calendar 是因为它会显示出来，和 DatePicker 冲突
	private DatePicker datePicker = null;
	private int curYear, curMonth, curDay;
	
	private class DateChangedListener implements OnDateChangedListener 

		@Override
		public void onDateChanged(DatePicker view, int year, int monthOfYear,
				int dayOfMonth) 
			// TODO Auto-generated method stub
			curYear = year;
			curMonth = monthOfYear;
			curDay = dayOfMonth;
			textView.setText("当前时间：" + curYear + "年" + curMonth + "月" + curDay + "日");
		
	
	
	@Override
	protected void onCreate(Bundle savedInstanceState) 
		// TODO Auto-generated method stub
		super.onCreate(savedInstanceState);
		setContentView(R.layout.activity_main);
		
		textView = (TextView)findViewById(R.id.textView1);
		datePicker = (DatePicker)findViewById(R.id.datePicker1);
		curYear = 2016;
		curMonth = 1;
		curDay = 19;
//		calendar = Calendar.getInstance();
//		curYear = calendar.get(Calendar.YEAR);
//		curMonth = calendar.get(Calendar.MONTH) + 1;
//		curDay = calendar.get(Calendar.DAY_OF_MONTH);
		
		textView.setText("当前时间：" + curYear + "年" + curMonth + "月" + curDay + "日");
		datePicker.init(curYear, curMonth, curDay, new DateChangedListener());
	

2.activity_main.xml

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:padding="30dp"
    android:orientation="vertical" >

    <DatePicker
        android:id="@+id/datePicker1"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_gravity="center" />

    <TextView
        android:id="@+id/textView1"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_gravity="center"
        android:layout_marginTop="30dp"
        android:textAppearance="?android:attr/textAppearanceMedium" />

</LinearLayout>

3.AndroidManifest.xml

<manifest xmlns:android="http://schemas.android.com/apk/res/android"
    package="com.sweetlover.datepickerdemo"
    android:versionCode="1"
    android:versionName="1.0" >

    <uses-sdk
        android:minSdkVersion="8"
        android:targetSdkVersion="19" />

    <application
        android:allowBackup="true"
        android:icon="@drawable/ic_launcher"
        android:label="@string/app_name"
        android:theme="@style/AppTheme" >
        <activity android:name="com.sweetlover.activity.MainActivity">
            <intent-filter>
                <action android:name="android.intent.action.MAIN"/>
                <category android:name="android.intent.category.LAUNCHER"/>
            </intent-filter>
        </activity>
    </application>

</manifest>