TimePicker对话框的updateTime没有任何效果

Question

我有一个TimePickerDialog的自定义实现，在其中我覆盖onTimeChanged方法做我选择的一些争论。我看到一些帖子要求使用反射来获取此对话框的TimePicker并将onTimeChange listner设置为＆＃34;这个＆＃34;，为什么我们甚至需要这样做...我的意思是实际的时间选择器代码本身设置timeChangeListner到＆＃34;这＆＃34;

http://grepcode.com/file/repository.grepcode.com/java/ext/com.google.android/android/4.2.1_r1.2/android/app/TimePickerDialog.java

我们不应该只是覆盖onTimeChanged方法吗？但事实是，即使onTimeChanged被调用，它被多次调用，而updateTime似乎也没有在timepicker上产生任何影响。  以下是TimePickerDialog的实现：

public class RangeTimePickerDialog extends TimePickerDialog{

    private Integer minHour, minMinute, maxHour, maxMinute;

    public RangeTimePickerDialog(Context context, OnTimeSetListener listener, int hourOfDay, int minute, boolean is24HourView) {
        super(context, listener, hourOfDay, minute, is24HourView);
        try {
            Class<?> superclass = getClass().getSuperclass();
            Field mTimePickerField = superclass.getDeclaredField("mTimePicker");
            mTimePickerField.setAccessible(true);
            TimePicker mTimePicker = (TimePicker) mTimePickerField.get(this);
            mTimePicker.setOnTimeChangedListener(this);
        } catch (NoSuchFieldException e) {
        } catch (IllegalArgumentException e) {
        } catch (IllegalAccessException e) {
        }
    }


    public void setMinTime(int hour, int minute) {
        minHour = hour;
        minMinute = minute;
    }

    public void setMaxTime(int hour, int min) {
        maxHour = hour;
        maxMinute = min;
    }


    private void updateDisplay() {
        setTitle("Please Select A Valid Time");
    }
    @Override
    public void onTimeChanged(TimePicker view, int hourOfDay, int minute) {
        Log.d("RangeTimePicker", "onTimeChanged Called");
        if (minHour != null) {

            if (hourOfDay < minHour || (hourOfDay == minHour && minute <= minMinute)) {
                updateTime(minHour, minMinute);
                updateDisplay();
            }
        }
        if( maxHour != null) {

            if(hourOfDay > maxHour || (hourOfDay ==maxHour && minute > maxMinute)){
                updateTime(maxHour, maxMinute);
                updateDisplay();
            }
        }
    }
}