Android DatePickerDialog:设置选择的最小和最大日期 [英] Android DatePickerDialog: Set min and max date for selection

问题描述

我知道对此有很多问题，但是没有一种解决方案对我有用，所以这个问题.我想限制用户选择今天之前的日期，但不能这样做.

I know there are quite a lot of question for this but none of the solutions are working for me, so this question. I want to restrict user to select date before today, but am not able to do so.

public class DatePickerDialogFragment extends DialogFragment {

    private OnDateSetListener listener;

    public void setListener(OnDateSetListener listener) {
        this.listener = listener;
    }

    @NonNull
    @Override
    public Dialog onCreateDialog(Bundle savedInstanceState) {
        Calendar calendar = Calendar.getInstance();
        int year    = calendar.get(Calendar.YEAR);
        int month   = calendar.get(Calendar.MONTH);
        int day     = calendar.get(Calendar.DAY_OF_MONTH);

        DatePickerDialog dialog = new DatePickerDialog(getContext(), listener, year, month, day);
        dialog.getDatePicker().setMinDate(calendar.getTimeInMillis());
        return dialog;
    }
}

我将其显示为:

DatePickerDialogFragment fragment = new DatePickerDialogFragment();
fragment.setListener(dateSetListener);
fragment.show(getSupportFragmentManager(), "Choose booking date");

我希望用户不能选择今天之前的日期.如您所见，今天的时间我调用了setMinDate()方法，但没有效果.该对话框将今天之前的日期显示为灰色但可以选择.

I want the user should not be able to select date before today. As you can see I called setMinDate() method with today's time but it as no effect. The dialog shows dates before today as grayed but selectable.

我也尝试按照某些stackoverflow答案中的建议对DatePickerDialog进行子类化并覆盖onDateChanged，但没有成功.

I also tried to sub-class DatePickerDialog and override onDateChanged as suggested in some stackoverflow answers but without any success.

推荐答案

尝试此方法

@NonNull
@Override
public Dialog onCreateDialog(Bundle savedInstanceState) {
    Calendar calendar = Calendar.getInstance();
    int year    = calendar.get(Calendar.YEAR);
    int month   = calendar.get(Calendar.MONTH);
    int day     = calendar.get(Calendar.DAY_OF_MONTH);

    DatePickerDialog dialog = new DatePickerDialog(getContext(), listener, year, month, day);
    Field mDatePickerField;
    try {
            mDatePickerField = dialog.getClass().getDeclaredField("mDatePicker");
            mDatePickerField.setAccessible(true);
    } catch (Exception e) {
            e.printStackTrace();
    }
    dialog.getDatePicker().setMinDate(System.currentTimeMillis() - 1000);
    return dialog;
}

代替您的

@NonNull
@Override
public Dialog onCreateDialog(Bundle savedInstanceState) {
    Calendar calendar = Calendar.getInstance();
    int year    = calendar.get(Calendar.YEAR);
    int month   = calendar.get(Calendar.MONTH);
    int day     = calendar.get(Calendar.DAY_OF_MONTH);

    DatePickerDialog dialog = new DatePickerDialog(getContext(), listener, year, month, day);
    dialog.getDatePicker().setMinDate(calendar.getTimeInMillis());
    return dialog;
}

我也遇到了这个问题，用户可以在Android L 5.0.2中选择不可选择的日期.当前有报告的错误

I have also faced this issue that user can select not-selectable dates in Android L 5.0.2. Currently there is bug reported here. It is solved in Android L 5.1.0.

对于此问题的临时解决方案，您可以将所选日期与当前系统日期进行比较，并根据此日期设置一些条件.我将其用作解决方法

For temporary solution of this issue you can compare selected date with current system date and put some condition based on that. I used this as my workaround

在DatePickerDialogFragment中添加onDateSent()方法，只需检查它是否早于在setMinDate()中设置的日期即可.如果是这样，则只需再次显示DatePickerDialog.

add onDateSent() method in DatePickerDialogFragment and just check if it's earlier than the date you set in setMinDate(). If so, then just show the DatePickerDialog again.

final long today = System.currentTimeMillis() - 1000;

@Override
public void onDateSet(DatePicker view, int year, int monthOfYear, int dayOfMonth) {
            Calendar calendar = Calendar.getInstance();
            calendar.set(year, monthOfYear, dayOfMonth);
            //If user tries to select date in past (or today)
            if (calendar.getTimeInMillis() < today)
            {
                //Make them try again
               DatePickerDialogFragment fragment = new DatePickerDialogFragment();
               fragment.setListener(dateSetListener);
               fragment.show(getSupportFragmentManager(), "Choose booking date");
               Toast.makeText(this, "Invalid date, please try again", Toast.LENGTH_LONG).show();
            }
            else
            {
                //success
            }
}

这篇关于Android DatePickerDialog:设置选择的最小和最大日期的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！