Android鸳鸯刀之DatePicker、TimePicker之明年今日

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Android鸳鸯刀之DatePicker、TimePicker之明年今日_第1张图片

鸳鸯刀

鸳鸯刀中藏有大秘密：仁者无敌！

今天我们学习如何利用Android平台“鸳鸯刀”DatePicker、TimePicker来设置日期和时间，下面给出该情景的案例：

一、案例技术要点

1.为DatePicker、TimePicker所在的Activity实现OnDateChangedListener、OnTimeChangedListener两类监听，并且为它们引入这两个监听。
2.datePicker.init(...)：初始化日期。
3.timePicker.setIs24HourView(true)：设置时间显示格式为24小时制。

二、案例代码陈列

AndroidManifest.xml

<manifest xmlns:android="http://schemas.android.com/apk/res/android"    package="com.android.datepicker"    android:versionCode="1"    android:versionName="1.0" >    <uses-sdk        android:minSdkVersion="8"        android:targetSdkVersion="15" />    <application        android:icon="@drawable/ic_launcher"        android:label="@string/app_name" >        <activity            android:name=".DateTimePickerMainActivity"            android:label="@string/app_name" >            <intent-filter>                <action android:name="android.intent.action.MAIN" />                <category android:name="android.intent.category.LAUNCHER" />            </intent-filter>        </activity>    </application></manifest>

strings.xml

<resources>    <string name="app_name">DateTimePicker输入日期时间</string></resources>

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:orientation="vertical">    <DatePicker        android:id="@+id/datePicker"        android:layout_width="match_parent"        android:layout_height="wrap_content" />    <TimePicker        android:id="@+id/timePicker"        android:layout_width="match_parent"        android:layout_height="wrap_content" />    <TextView        android:id="@+id/textView"        android:layout_width="wrap_content"        android:layout_height="wrap_content"        android:textSize="18sp" /></LinearLayout>

DateTimePickerMainActivity.java

package com.android.datepicker;import java.text.SimpleDateFormat;import java.util.Calendar;import android.app.Activity;import android.os.Bundle;import android.widget.DatePicker;import android.widget.TextView;import android.widget.Toast;import android.widget.DatePicker.OnDateChangedListener;import android.widget.TimePicker;import android.widget.TimePicker.OnTimeChangedListener;/** * DatePicker、TimePicker案例：设置日期时间 * 可输入日期（1900-1-1至2100-12-31） * @author lynnli1229  */public class DateTimePickerMainActivity extends Activity implements OnDateChangedListener, OnTimeChangedListener {    private TextView textView;    private DatePicker datePicker;    private TimePicker timePicker;    @Override    public void onCreate(Bundle savedInstanceState) {        super.onCreate(savedInstanceState);        setContentView(R.layout.main);        datePicker = (DatePicker) findViewById(R.id.datePicker);        timePicker = (TimePicker) findViewById(R.id.timePicker);        textView = (TextView) findViewById(R.id.textView);        // 初始化年月日        datePicker.init(2001, 1, 25, this);        // 设置24小时制显示        timePicker.setIs24HourView(true);        timePicker.setOnTimeChangedListener(this);    }    @Override    public void onTimeChanged(TimePicker view, int hourOfDay, int minute) {        Toast.makeText(this, "hourOfDay: " + hourOfDay + ", minute: " + minute,                Toast.LENGTH_LONG).show();    }    @Override    public void onDateChanged(DatePicker view, int year, int monthOfYear, int dayOfMonth) {        Calendar calendar = Calendar.getInstance();        calendar.set(datePicker.getYear(), datePicker.getMonth(),                datePicker.getDayOfMonth(), timePicker.getCurrentHour(),                timePicker.getCurrentMinute());                SimpleDateFormat sdf = new SimpleDateFormat("yyyy年MM月dd日    HH:mm");        textView.setText(sdf.format(calendar.getTime()));    }}

三、案例效果展示 Android鸳鸯刀之DatePicker、TimePicker之明年今日_第2张图片

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