Android DatePickerDialog:设置选择的最小和最大日期

Question

我知道这有很多问题,但没有一个解决方案适合我,所以这个问题.我想限制用户在今天之前选择日期,但我无法这样做.

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;
    }
}

我表现为:

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

我希望用户不应该在今天之前选择日期.正如你所看到的,我setMinDate()用今天的时间调用了方法,但它没有效果.该对话框显示今天之前的日期为灰色但可选择.

我也尝试按照一些stackoverflow答案中的建议进行子类DatePickerDialog和覆盖onDateChanged,但没有任何成功.

Answer 1

试试这个方法

@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;
}

而不是你的

@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;
}

EDIT1:

我也遇到过这个问题,用户可以选择不可选择的日期Android L 5.0.2.目前存在的bug报告在这里.它解决了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,并根据该日期添加一些条件.我用这个作为我的解决方法

EDIT2:

添加onDateSent()方法DatePickerDialogFragment并检查它是否早于您设置的日期setMinDate().如果是这样,那么只需显示DatePickerDialog再次.

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
            }
}

Answer 2

获取系统时间并从中减去1秒

 @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);

     dialog = new DatePickerDialog(act, listener, year, month, day);
     dialog.getDatePicker().setMinDate(System.currentTimeMillis() -1000);
     return dialog;
 }

Answer 3

dialog.getDatePicker().setMinDate(calendar.getTimeInMillis());