创建日期或时间选择窗口需要弹出Dialog的时候，Activity类的showDialog方法已经弃用了，而推荐使用的是DialogFragment，本文总结一下其具体用法.
（一）日期选择器
1、创建MyDatePickerDialog类，继承自DatePickerDialog类，实现构造方法，重写onDateChanged方法：
1 import android.app.DatePickerDialog;
2 import android.content.Context;
3 import android.widget.DatePicker;
4
5 public class MyDatePickerDialog extends DatePickerDialog {
6
7 public MyDatePickerDialog (Context context, OnDateSetListener callBack,
8 int year, int monthOfYear, int dayOfMonth) {
9 super(context, callBack, year, monthOfYear, dayOfMonth);
10
11 this.setTitle("选择任务的日期");
12 this.setButton2("取消", (OnClickListener)null);
13 this.setButton("确定", this); //setButton和this参数组合表示这个按钮是确定按钮
14
15 }
16
17 @Override
18 public void onDateChanged(DatePicker view, int year, int month, int day) {
19 super.onDateChanged(view, year, month, day);
20 this.setTitle("选择任务的日期");
21 }
22
23 }
注：隐藏日期选择器的“日”选择项的方法：在MyDatePickerDialog的构造方法中添加一个参数：代表日期选择器类型的整型参数，比如0代表年月日都显示，1表示只显示年和月等，然后用如下代码来隐藏“日”选择项（隐藏年月的方法同理，时间选择器也同理）：
1 // 获取当前系统的语言
2 Locale locale = context.getResources().getConfiguration().locale;
3 String language = locale.getLanguage();
4 // 隐藏日选择栏
5 if (language.endsWith("zh")) {
6 ((ViewGroup) ((ViewGroup) this.getDatePicker().getChildAt(0))
7 .getChildAt(0)).getChildAt(2).setVisibility(View.GONE);
8 } else {
9 ((ViewGroup) ((ViewGroup) this.getDatePicker().getChildAt(0))
10 .getChildAt(0)).getChildAt(1).setVisibility(View.GONE);
11 }
2、创建DatePickerFragment类，继承自DialogFragment类并实现DatePickerDialog.OnDateSetListener接口，重写其onCreateDialog和onDateSet方法：
1 import java.util.Calendar;
2
3 import android.app.Dialog;
4 import android.app.DialogFragment;
5 import android.os.Bundle;
6 import android.widget.DatePicker;
7 import android.app.DatePickerDialog;
8
9 public class DatePickerFragment extends DialogFragment implements
10 DatePickerDialog.OnDateSetListener {
11 @Override
12 public Dialog onCreateDialog(Bundle savedInstanceState) {
13 final Calendar c = Calendar.getInstance();
14 int year = c.get(Calendar.YEAR);
15 int month = c.get(Calendar.MONTH);
16 int day = c.get(Calendar.DAY_OF_MONTH);
17 return new MyDatePickerDialog(getActivity(), this, year, month, day);
18 }
19
20 @Override
21 public void onDateSet(DatePicker view, int year, int month, int day) {
22
23 }
24
25 }
3、在活动中显示日期选择器
1 DatePickerFragment datePickerFrg = new DatePickerFragment() {
2 @Override
3 public void onDateSet(DatePicker view, int year, int month,
4 int day) {
5 Log.d("DateSet","选择的日期是：" + year +"-" + (month + 1) + "-" + day); }
6 };
7 datePickerFrg.show(getFragmentManager(), "datePickerFrg");
效果：
（二）时间选择器
时间选择器的使用其实和日期选择器差不多.
1、创建MyTimePickerDialog类，继承自TimePickerDialog，实现构造方法，重写onTimeChanged方法：
1 import android.app.TimePickerDialog;
2 import android.content.Context;
3 import android.content.DialogInterface.OnClickListener;
4 import android.widget.TimePicker;
5
6 public class MyTimePickerDialog extends TimePickerDialog {
7
8 public MyTimePickerDialog (Context context, OnTimeSetListener callBack,
9 int hourOfDay, int minute, boolean is24HourView) {
10 super(context, callBack, hourOfDay, minute, is24HourView);
11
12 this.setTitle("选择任务的时间");
13 this.setButton2("取消", (OnClickListener)null);
14 this.setButton("确定", this); //setButton和this参数组合表示这个按钮是确定按钮
15 }
16
17 @Override
18 public void onTimeChanged(TimePicker view, int hourOfDay, int minute) {
19 super.onTimeChanged(view, hourOfDay, minute);
20 this.setTitle("选择任务的时间");
21 }
22
23 }
2、创建TimePickerFragment类，继承自DialogFragment类并实现TimePickerDialog.OnTimeSetListener接口，重写其onCreateDialog和onTimeSet方法：
1 public class TimePickerFragment extends DialogFragment implements
2 TimePickerDialog.OnTimeSetListener {
3
4 @Override
5 public Dialog onCreateDialog(Bundle savedInstanceState) {
6 final Calendar calendar = Calendar.getInstance();
7 int hour = calendar.get(Calendar.HOUR_OF_DAY);
8 int minute = calendar.get(Calendar.MINUTE);
9
10 return new MyTimePickerDialog(getActivity(), this, hour, minute,
11 DateFormat.is24HourFormat(getActivity()));
12 }
13
14 @Override
15 public void onTimeSet(TimePicker view, int hourOfDay, int minute) {
16
17 }
18 }
3、在活动中显示时间选择器：
1 TimePickerFragment timePickerFrg = new TimePickerFragment() {
2 @Override
3 public void onTimeSet(android.widget.TimePicker view,
4 int hourOfDay, int minute) {
5 Log.d("TimeSet", "选择的时间是：" + hourOfDay + ":" + minute);
6 };
7 };
8 timePickerFrg.show(getFragmentManager(), "timePickerFrg");
效果：
