你好！
当用户单击设置项（首选项）时，我希望我的应用程序显示 TimePicker 对话框。我已经创建了一个创建 TimePicker 对话框的 DialogFragment，但我无法将此片段与自定义首选项联系起来。怎么可能做到这一点？
这是需要与自定义首选项绑定在一起的 DialogFragment 类：
import java.util.Calendar;
import android.app.Dialog;
import android.app.TimePickerDialog;
import android.os.Bundle;
import android.app.DialogFragment;
import android.text.format.DateFormat;
import android.widget.TimePicker;
public class MyDialogFragment extends DialogFragment implements TimePickerDialog.OnTimeSetListener {
@Override
public Dialog onCreateDialog(Bundle savedInstanceState) {
// Use the current time as the default values for the picker
final Calendar c = Calendar.getInstance();
int hour = c.get(Calendar.HOUR_OF_DAY);
int minute = c.get(Calendar.MINUTE);
// Create a new instance of TimePickerDialog and return it
return new TimePickerDialog(getActivity(), this, hour, minute,
DateFormat.is24HourFormat(getActivity()));
}
public void onTimeSet(TimePicker view, int hourOfDay, int minute) {
// Do something with the time chosen by the user
Calendar calendar = Calendar.getInstance();
calendar.set(Calendar.HOUR_OF_DAY, hourOfDay);
calendar.set(Calendar.MINUTE, minute);
calendar.set(Calendar.SECOND, 0);
((OpeningScreen) getActivity()).timerAlert(calendar.getTimeInMillis());
}
}