日期選擇器(DatePicker)和時間選擇器(TimePicker)

日期選擇器(DatePicker)和時間選擇器(TimePicker)是讓用戶選擇月/日/年和小時/分鐘/AM或PM的小工具.





修改main.xml為整個LinearLayout添加兩個按鈕(Button)以激活日期選擇器(DatePicker)或時間選擇器(TimePicker).

<?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"
    >
<TextView  
    android:layout_width="fill_parent" 
    android:layout_height="wrap_content" 
    android:text="@string/hello"
    />
<Button
    android:id="@+id/datepickerbutton"
    android:layout_width="fill_parent" 
    android:layout_height="wrap_content" 
    android:text="DatePicker"
 />
<Button
    android:id="@+id/timepickerbutton"
    android:layout_width="fill_parent" 
    android:layout_height="wrap_content" 
    android:text="TimePicker"
 />
</LinearLayout>

然後修改主程序:

package com.AndroidDatePicker;

import java.util.Calendar;

import android.app.Activity;
import android.app.DatePickerDialog;
import android.app.Dialog;
import android.app.TimePickerDialog;
import android.os.Bundle;
import android.view.View;
import android.widget.Button;
import android.widget.DatePicker;
import android.widget.TimePicker;
import android.widget.Toast;

public class AndroidDatePicker extends Activity {
 
 private int myYear, myMonth, myDay, myHour, myMinute;
 static final int ID_DATEPICKER = 0;
 static final int ID_TIMEPICKER = 1;
 
    /** Called when the activity is first created. */
    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.main);
        
        Button datePickerButton = (Button)findViewById(R.id.datepickerbutton);
        Button timePickerButton = (Button)findViewById(R.id.timepickerbutton);
        datePickerButton.setOnClickListener(datePickerButtonOnClickListener);
        timePickerButton.setOnClickListener(timePickerButtonOnClickListener);
    }
    
    private Button.OnClickListener datePickerButtonOnClickListener
     = new Button.OnClickListener(){

   @Override
   public void onClick(View v) {
    // TODO Auto-generated method stub
    final Calendar c = Calendar.getInstance();
    myYear = c.get(Calendar.YEAR);
    myMonth = c.get(Calendar.MONTH);
    myDay = c.get(Calendar.DAY_OF_MONTH);
    showDialog(ID_DATEPICKER);
   }
    };
    
    private Button.OnClickListener timePickerButtonOnClickListener
  = new Button.OnClickListener(){

   @Override
   public void onClick(View v) {
    // TODO Auto-generated method stub
    final Calendar c = Calendar.getInstance();
    myHour = c.get(Calendar.HOUR_OF_DAY);
    myMinute = c.get(Calendar.MINUTE);
    showDialog(ID_TIMEPICKER);
   }
    };

 @Override
 protected Dialog onCreateDialog(int id) {
  // TODO Auto-generated method stub
  switch(id){
   case ID_DATEPICKER:
    Toast.makeText(AndroidDatePicker.this, 
      "- onCreateDialog(ID_DATEPICKER) -", 
      Toast.LENGTH_LONG).show();
    return new DatePickerDialog(this,
      myDateSetListener,
      myYear, myMonth, myDay);
   case ID_TIMEPICKER:
    Toast.makeText(AndroidDatePicker.this, 
      "- onCreateDialog(ID_TIMEPICKER) -", 
      Toast.LENGTH_LONG).show();
    return new TimePickerDialog(this,
      myTimeSetListener,
      myHour, myMinute, false);
   default:
    return null;
    
  }
 }
    
 private DatePickerDialog.OnDateSetListener myDateSetListener
  = new DatePickerDialog.OnDateSetListener(){

   @Override
   public void onDateSet(DatePicker view, int year, 
     int monthOfYear, int dayOfMonth) {
    // TODO Auto-generated method stub
    String date = "Year: " + String.valueOf(year) + "\n"
     + "Month: " + String.valueOf(monthOfYear+1) + "\n"
     + "Day: " + String.valueOf(dayOfMonth);
    Toast.makeText(AndroidDatePicker.this, date, 
      Toast.LENGTH_LONG).show();
   }
 };
 
 private TimePickerDialog.OnTimeSetListener myTimeSetListener
  = new TimePickerDialog.OnTimeSetListener(){

   @Override
   public void onTimeSet(TimePicker view, int hourOfDay, int minute) {
    // TODO Auto-generated method stub
    String time = "Hour: " + String.valueOf(hourOfDay) + "\n"
     + "Minute: " + String.valueOf(minute);
    Toast.makeText(AndroidDatePicker.this, time, 
      Toast.LENGTH_LONG).show();
   }
 };
    
}