DatePickerDialog使用方法

通过学习DatePickerDialog，它为弹出一个修改系统时间的模态对话框，创建DatePickerDialog步骤如下：

package com.dateandtime;

import android.app.Activity;
import android.app.DatePickerDialog;
import android.app.Dialog;
import android.os.Bundle;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
import android.widget.DatePicker;

public class MainActivity extends Activity {
/** Called when the activity is first created. */
private Button showDatePickerButton = null;
//该常量用于标识DatePickerDialog
private static final int DATE_PICKER_ID = 1;
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
showDatePickerButton = (Button) findViewById(R.id.showDatePickerButton);
showDatePickerButton.setOnClickListener(new ButtonListener());
}

private class ButtonListener implements OnClickListener {

@Override
public void onClick(View v) {
//此方法用于显示DatePickerDialog
showDialog(DATE_PICKER_ID);
}

}
//监听器，用户监听用户点下DatePikerDialog的set按钮时，所设置的年月日
DatePickerDialog.OnDateSetListener onDateSetListener = new DatePickerDialog.OnDateSetListener() {
//监听器，用户监听用户点下DatePikerDialog的set按钮时，所设置的年月日
@Override
public void onDateSet(DatePicker view, int year, int monthOfYear,
int dayOfMonth) {
System.out.println(year + "-" + monthOfYear + "-" + dayOfMonth);
}
};
//创建一个DatePickerDialog对象
@Override
protected Dialog onCreateDialog(int id) {
switch (id) {
case DATE_PICKER_ID:
//设置DatePickerDialog显示默认的时间
return new DatePickerDialog(this, onDateSetListener, 2010, 11, 25);
}
return null;
}

}