DatePicker和DatePickerDialog的使用

activity_main.xml:

   <Button
       android:id="@+id/showDatePickerButton"
       android:text="@string/calendar"
       android:layout_width="wrap_content"
       android:layout_height="wrap_content" />

MainActivity.java:

package leihu.date_and_time;
 
import android.os.Bundle;
 
import android.app.Activity;
 
import android.app.DatePickerDialog;
 
import android.app.Dialog;
 
import android.view.View;
 
import android.view.View.OnClickListener;
 
import android.widget.Button;
 
import android.widget.DatePicker;
 
public class MainActivity extends Activity {
 
         private Button showDatePickerButton = null;
 
         //该常量用于标识DatePickerDialog
 
         private static final int DATE_PICKER_ID = 1;
 
         @Override
 
         protected void onCreate(Bundle savedInstanceState) {
 
                   super.onCreate(savedInstanceState);
 
                   setContentView(R.layout.activity_main);
 
                   showDatePickerButton = (Button)findViewById
 
(R.id.showDatePickerButton);
 
                   showDatePickerButton.setOnClickListener(new ButtonListener());
 
         }
 
         private class ButtonListener implements OnClickListener{
 
                   @Override
 
                   public void onClick(View v) {
 
                            // TODO Auto-generated method stub
 
                            //此方法用于显示DatePickerDialog
 
                            showDialog(DATE_PICKER_ID);
 
                   }
 
         }
 
         DatePickerDialog.OnDateSetListener onDateSetListener = new
 
DatePickerDialog.OnDateSetListener() {
 
                   @Override
 
                   public void onDateSet(DatePicker view, int year, int monthOfYear,
 
                                     int dayOfMonth) {
 
                            // TODO Auto-generated method stub
 
                            System.out.println(year+"-"+monthOfYear+"—"+dayOfMonth);
 
                   }
 
         };
 
         protected Dialog onCreateDialog(int id){
 
                   switch(id){
 
                   case DATE_PICKER_ID:
 
                            return new DatePickerDialog
 
(this,onDateSetListener,2012,11,21);
 
                   }
                   return null;
         }
 
}