如何扩展
DatePickerDialog和添加一种
setPermanentTitle存储永久性标题的方法，该方法将在日期更改时被强制执行？
public class MyDatePickerDialog extends DatePickerDialog { private CharSequence title; public MyDatePickerDialog(Context context, onDateSetListener callBack, int year, int monthOfYear, int dayOfMonth) { super(context, callBack, year, monthOfYear, dayOfMonth); } public void setPermanentTitle(CharSequence title) { this.title = title; setTitle(title); } @Override public void onDateChanged(DatePicker view, int year, int month, int day) { super.onDateChanged(view, year, month, day); setTitle(title); }}然后使用新
setPermanentTitle方法：
MyDatePickerDialog dpd = new MyDatePickerDialog(this, null, 2012, 10, 10); dpd.setPermanentTitle("set date");
