java - 不显示 android timePicker 对话框的当前时间

Question

我有时间在我的应用程序中使用 editText。单击时，会弹出TimePicker对话框。

    timeIn.setOnClickListener(new View.OnClickListener() {
                @Override
                public void onClick(View v) { //shows timePick
                    isEdited=true;
                    Fragment fragDialog = getSupportFragmentManager().findFragmentByTag("TimePicker");
                    if (fragDialog == null) { // Fragment not added
                        tp.setFlag(TimePick.FLAG_START_DATE);
                        FragmentTransaction ft = getSupportFragmentManager().beginTransaction();
                        tp.show(ft, "TimePicker");
                    } else {

                        // already active
                    }
                }
            });


  public static class TimePick extends android.support.v4.app.DialogFragment implements TimePickerDialog.OnTimeSetListener {

        public static final int FLAG_START_DATE = 00;
        public static final int FLAG_END_DATE = 01;
        private int flag = 00;

        @Override
        public Dialog onCreateDialog(Bundle savedInstanceState) {

            final Calendar c = Calendar.getInstance();
            int hour = c.get(Calendar.HOUR_OF_DAY);
            int minute = c.get(Calendar.MINUTE);
            return new TimePickerDialog(getActivity(), this, hour, minute, DateFormat.is24HourFormat(getActivity()));
        }

        public void setFlag(int i) {
            flag = i;
        }


        @Override
        public void onTimeSet(TimePicker view, int hourofDay, int minute) {

            if (flag == FLAG_START_DATE) {
                timeIn.setText(Integer.toString(hourofDay) + ":" + Integer.toString(minute));
                TimeIn = timeIn.getText().toString();
            }
            if (flag == FLAG_END_DATE) {
                timeOut.setText(Integer.toString(hourofDay) + ":" + Integer.toString(minute));
                TimeOut = timeOut.getText().toString();
            }



        }

    }

选择的时间可以是timeIn中的setText。但是，当我再次单击 timeIn editText 时，timePicker 对话框 会弹出当前时间。是否可以让它显示所选时间而不是当前时间？如果是第一次点击，则只显示当前时间。

Answer 1

这不是你在这里做的吗

final Calendar c = Calendar.getInstance();
int hour = c.get(Calendar.HOUR_OF_DAY);
int minute = c.get(Calendar.MINUTE);
return new TimePickerDialog(getActivity(), this, hour, minute, DateFormat.is24HourFormat(getActivity()));

您正在将当前时间传递给对话框，这就是它显示当前时间的原因。

解决方案:

保存选定的时间并在创建对话框时将其传递给类，并在此代码中使用该时间。如果您没有任何选定时间，则使用当前时间。一个小的 if-else block 和一些变量就可以了。

在外部类中定义这些变量。

public static int inHour = -1;
public static int inMin = -1;
public static int outHour = -1;
public static int outMin = -1;

像这样更新 onTimeSet 方法

if (flag == FLAG_START_DATE) {
    inHour = hourofDay;
    inMin = minute;
    timeIn.setText(Integer.toString(hourofDay) + ":" + Integer.toString(minute));
    TimeIn = timeIn.getText().toString();
}
else if (flag == FLAG_END_DATE) {
    outHour = hourofDay;
    outMin = minute;
    timeOut.setText(Integer.toString(hourofDay) + ":" + Integer.toString(minute));
    TimeOut = timeOut.getText().toString();
}

将 onCreateDialog 中的当前代码替换为

final Calendar c = Calendar.getInstance();
int hour = c.get(Calendar.HOUR_OF_DAY);
int min = c.get(Calendar.MINUTE);
if((flag == FLAG_START_DATE) && inHour != -1 && inMin != -1) 
{
     hour = inHour;
     min = inMin;
}
else if((flag == FLAG_END_DATE) && outHour != -1 && outMin != -1) 
{
     hour = outHour;
     min = outMin;
}

return new TimePickerDialog(getActivity(), this, hour, min, DateFormat.is24HourFormat(getActivity()));