文章标题

　　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     @Override18     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 implements10         DatePickerDialog.OnDateSetListener {11     @Override12     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     @Override21     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                 @Override3                 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     @Override18     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     @Override15     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                 @Override3                 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：