DatePicker和DatePickerDialog的使用

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

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;
}

}