Android實用筆記——使用DataPicker和TimePicker顯示當前日期和時間

 

一、事先準備:java

    熟悉DatePicker和TimePicker兩種實現動態輸入日期和時間的功能,輸入模塊貼合在屏幕上;android

    熟悉DatePickerDialog和TimePickerDialog兩種實現動態輸入日期和時間的對話框,輸入模塊以對話框形式出現;api

 

二、針對檢測日期時間改變的監聽器:app

    a、針對輸入模塊貼合在屏幕的監聽器:OnDateChangedListener和OnTimeChangedListener()ide

        當用戶更改DataPicker裏的年月日時,將觸發OnDateChangedListener監聽器的onDateChange()事件;佈局

        當用戶更改了TimePicker裏的時分時,將觸發OnTimeChangedListener()的onTimeChanged()事件;this

    b、針對輸入模塊以對話框形式出現的監聽器:OnDateSetListener和OnTimeSetListener()code

        當用戶更改DataPickerDialog裏的年月日時,將觸發OnDateSetListener監聽器的onDateSet()事件;xml

        當用戶更改TimePickerDialog裏的時分時,將觸發OnTimeSetListener監聽器的onTimeSet()事件;對象

 

三、樣例需求功能描述:

    默認在標題欄中展現當前日期和時間,經過監聽器去獲取用戶選擇日期或時間的結果,並將變動的日期或時間展現在標題欄上。

    利用setTitle去改變標題欄內容。

 

四、使用DataPicker實現日曆選擇器,使用TimePicker實現時間選擇器:

    建立main.xml文件,設置其佈局爲:

<?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="wrap_content"
        android:layout_height="wrap_content" />

    <TimePicker
        android:id="@+id/timePicker"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content" />

</LinearLayout>

    修改MainActivity.java文件

package com.example.myandroiddatapickerandtimepicker;

import java.util.Calendar;

import android.os.Bundle;
import android.R.integer;
import android.app.Activity;
import android.view.Menu;
import android.widget.CalendarView;
import android.widget.DatePicker;
import android.widget.DatePicker.OnDateChangedListener;
import android.widget.TimePicker;
import android.widget.TimePicker.OnTimeChangedListener;

public class MainActivity extends Activity {
	//定義
	private TimePicker timePicker;
	private DatePicker datePicker;
	private Calendar cal;
	private int year;
	private int month;
	private int day;
	private int hour;
	private int minute;
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.main);
        //獲取日曆的對象
        cal=Calendar.getInstance();
        //獲取年月日時分秒的信息
        year=cal.get(Calendar.YEAR);
        month=cal.get(Calendar.MONTH)+1;//從0開始計算月份
        day=cal.get(Calendar.DAY_OF_MONTH);
        hour=cal.get(Calendar.HOUR_OF_DAY);
        minute=cal.get(Calendar.MINUTE);
        
        //顯示在標題欄
        setTitle(year+"-"+month+"-"+day+"-"+hour+":"+minute);
        
        //用findById方法將佈局文件和變量進行綁定
        datePicker=(DatePicker) findViewById(R.id.datePicker);
        timePicker=(TimePicker) findViewById(R.id.timePicker);
        
        //datePicker初始化
        datePicker.init(year, cal.get(Calendar.MONTH), day, new OnDateChangedListener() {
			
			@Override
			public void onDateChanged(DatePicker view, int year, int monthOfYear, int dayofMonth) {
				// TODO Auto-generated method stub
				setTitle(year+"-"+monthOfYear+1+"-"+dayofMonth);
			}
		});
        
        timePicker.setOnTimeChangedListener(new OnTimeChangedListener() {
			
			@Override
			public void onTimeChanged(TimePicker view, int hourOfDay, int minute) {
				// TODO Auto-generated method stub
				setTitle(hourOfDay+":"+minute);
			}
		});
    }

}

    這樣選擇的日期、時間將動態刷新到標題欄

 

五、使用DataPickerDialog實現日曆選擇器,使用TimePickerDialog實現時間選擇器:

     修改上述MainActivity.java文件

package com.example.myandroiddatapickerandtimepicker;

import java.util.Calendar;

import android.os.Bundle;
import android.R.integer;
import android.app.Activity;
import android.app.DatePickerDialog;
import android.app.DatePickerDialog.OnDateSetListener;
import android.app.TimePickerDialog;
import android.app.TimePickerDialog.OnTimeSetListener;
import android.view.Menu;
import android.widget.CalendarView;
import android.widget.DatePicker;
import android.widget.DatePicker.OnDateChangedListener;
import android.widget.TimePicker;
import android.widget.TimePicker.OnTimeChangedListener;

public class MainActivity extends Activity {
	//定義
	private TimePicker timePicker;
	private DatePicker datePicker;
	private Calendar cal;
	private int year;
	private int month;
	private int day;
	private int hour;
	private int minute;
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.main);
        //獲取日曆的對象
        cal=Calendar.getInstance();
        //獲取年月日時分秒的信息
        year=cal.get(Calendar.YEAR);
        month=cal.get(Calendar.MONTH)+1;//從0開始計算月份
        day=cal.get(Calendar.DAY_OF_MONTH);
        hour=cal.get(Calendar.HOUR_OF_DAY);
        minute=cal.get(Calendar.MINUTE);
        
        //顯示在標題欄
        setTitle(year+"-"+month+"-"+day+"-"+hour+":"+minute);
        
        //DatePickerDialog的初始化
        /*new DatePickerDialog(this, new OnDateSetListener() {
			
			@Override
			public void onDateSet(DatePicker view, int year, int monthOfYear, int dayOfMonth) {
				// TODO Auto-generated method stub
				setTitle(year+"-"+(monthOfYear+1)+"-"+dayOfMonth);
			}
		}, year, cal.get(Calendar.MONTH), day).show();*/
        
        new TimePickerDialog(this, new OnTimeSetListener() {
			
			@Override
			public void onTimeSet(TimePicker view, int hourOfDay, int minute) {
				// TODO Auto-generated method stub
				setTitle(hourOfDay+":"+minute);
			}
		}, hour, minute, true).show();
    }

}

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