Android中DatePicker與TimePicker用法講解（包括DatePickerDialog與TimePickerDialog）

實現效果：將DatePicker和TimePicker修改的日期和時間實時顯示在程序標題欄上。

1.通過DatePicker和TimePicker來實現

布局為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" />

</LinearLayout>

MainActivity.java

import java.util.Calendar;
import android.support.v7.app.ActionBarActivity;
import android.app.DatePickerDialog;
import android.app.DatePickerDialog.OnDateSetListener;
import android.app.TimePickerDialog;
import android.app.TimePickerDialog.OnTimeSetListener;
import android.os.Bundle;
import android.view.Menu;
import android.view.MenuItem;
import android.widget.DatePicker;
import android.widget.DatePicker.OnDateChangedListener;
import android.widget.TimePicker;
import android.widget.TimePicker.OnTimeChangedListener;

public class MainActivity extends ActionBarActivity {
    private TimePicker timePicker;
    private DatePicker datePicker;
    private Calendar cal;
    private int year, month, day;
    private int hour, minute;
    
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.main);
        
        //獲取日歷的一個對象
        cal = Calendar.getInstance();
        
        //獲取年月日時分秒的信息
        year = cal.get(Calendar.YEAR);
        //month從0開始計算(一月month = 0)
        month = cal.get(Calendar.MONTH)+1;
        day = cal.get(Calendar.DAY_OF_MONTH);
        hour = cal.get(Calendar.HOUR_OF_DAY);
        minute = cal.get(Calendar.MINUTE);
        
        //設置標題
        setTitle(year+"-"+month+"-"+day+" "+hour+":"+minute);
        
        datePicker = (DatePicker) findViewById(R.id.datePicker);
        timePicker = (TimePicker) findViewById(R.id.timePicker);
        
        //datePicker的初始化
        datePicker.init(year,  cal.get(Calendar.MONTH), day, new OnDateChangedListener() {
            @Override
            public void onDateChanged(DatePicker view, int year, int monthOfYear,int dayOfMonth) {
                //monthOfYear從0計算
                setTitle(year+"-"+(monthOfYear+1)+"-"+dayOfMonth);
            }
        });
        
        timePicker.setOnTimeChangedListener(new OnTimeChangedListener() {
            @Override
            public void onTimeChanged(TimePicker view, int hourOfDay, int minute) {
                setTitle(hourOfDay+":"+minute);
            }
        });
　　}
}

首先建立Calendar對象來獲取當前的系統時間和日期，然后設置在程序標題欄上，注意cal.get(Calendar.MONTH)返回的值從0開始，即返回0時代表一月。

DatePicker初始化調用public void init(int year, int monthOfYear, int dayOfMonth, OnDateChangedListener onDateChangedListener),最后一個參數為DatePicker的監聽器。TimePicker直接設置監聽器。

運行截圖 

更改DatePicker

更改TimePicker

2.使用Dialog,更加美觀

布局為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" >

</LinearLayout>

 

沒有加入任何控件

 

MainActivity.java

import java.util.Calendar;

import android.support.v7.app.ActionBarActivity;
import android.app.DatePickerDialog;
import android.app.DatePickerDialog.OnDateSetListener;
import android.app.TimePickerDialog;
import android.app.TimePickerDialog.OnTimeSetListener;
import android.os.Bundle;
import android.view.Menu;
import android.view.MenuItem;
import android.widget.DatePicker;
import android.widget.DatePicker.OnDateChangedListener;
import android.widget.TimePicker;
import android.widget.TimePicker.OnTimeChangedListener;

public class MainActivity extends ActionBarActivity {private Calendar cal;
    private int year, month, day;
    private int hour, minute;
    
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.main);
        
        //獲取日歷的一個對象
        cal = Calendar.getInstance();
        
        //獲取年月日時分秒的信息
        year = cal.get(Calendar.YEAR);
        //month從0開始計算(一月month = 0)
        month = cal.get(Calendar.MONTH)+1;
        day = cal.get(Calendar.DAY_OF_MONTH);
        hour = cal.get(Calendar.HOUR_OF_DAY);
        minute = cal.get(Calendar.MINUTE);
        
        //設置標題
        setTitle(year+"-"+month+"-"+day+" "+hour+":"+minute);
        //日歷選擇器的對話框形式
        new DatePickerDialog(this, new OnDateSetListener() {
            @Override
            public void onDateSet(DatePicker view, int year, int monthOfYear, int dayOfMonth) {
                setTitle(year+"-"+(monthOfYear+1)+"-"+dayOfMonth);
            }
        },year, cal.get(Calendar.MONTH), day).show(); 
        
        //時間選擇器的對話框形式(最后一個參數is24HourView，是否為24小時制)
        new TimePickerDialog(this, new OnTimeSetListener() {
            @Override
            public void onTimeSet(TimePicker view, int hourOfDay, int minute) {
                setTitle(hourOfDay+":"+minute);
            }
        }, hour, minute, true).show();
    }
    
}

使用匿名類的方式，直接創建DatePickerDialog和TimePickerDialog對象，構造方法如下

public DatePickerDialog(Context context, OnDateSetListener callBack, int year, int monthOfYear, int dayOfMonth)

public TimePickerDialog(Context context, OnTimeSetListener callBack, int hourOfDay, int minute, boolean is24HourView)

直接在構造方法中使用匿名內部類的方法添加監聽器，is24HourView是個boolean類型的值，來表示是否使用24小時制。

 

運行截圖

總結：

注意使用cal.get(Calendar.MONTH)得到的值會比真實的月份值小1，在setTitle時需要加1，而在傳入到DatePicker的初始化方法和DatePickerDialog的構造方法時應該直接傳入。

建議在這兩個方法內直接寫cal.get(Calendar.MONTH)，不要用自定義變量month。