没有星期日的Android DatePicker

Question

我正在使用日期选择器来选择特定的日期。日期选择器不应该允许选择星期日。直到现在，我在选择后检测星期日，并显示一条消息，但如果日期选择器不允许星期日，它会更好。有没有办法做到这一点？

代码来检测星期日：

private static class DatePickerFragment extends DialogFragment implements DatePickerDialog.OnDateSetListener 
{ 

    @Override 
    public Dialog onCreateDialog(Bundle savedInstanceState) 
    { 
    [...] 
    } 

    public void onDateSet(DatePicker view, int year, int month, int day) 
    { 
     Calendar now = Calendar.getInstance(); 
     Calendar choosen = Calendar.getInstance(); 
     choosen.set(year, month, day); 
     if (now.compareTo(choosen) < 0) 
     { 
      UserMessage.showMessage("The choosen date is in future", "Invalid date", getActivity()); 
      return; 
     } else if (choosen.get(Calendar.DAY_OF_WEEK) == Calendar.SUNDAY) 
     { 
      UserMessage.showMessage("The choosen date is on sunday!", "Invalid date", 
        getActivity()); 
      return; 
     } 
     [...] 
    } 
}   

Answer 1

我解决了创建包含有日期选择器自定义XML布局的自定义对话框这个要求。

我创建为大家下面的例子中，谁需要有特殊需要的一样，没有星期天日期选择器对话框，没有日期之前要提供具体的日期选择：

创建自定义日期选择器：

public void showDatePicker() { 
    final String dateFormatStr = "yyyyMMdd"; 
    final String dateSearchFormatStr = "yyyy-MM-dd"; 
    final String dateFormatStrGUI = "dd.MM.yyyy"; 
    final String dateFormatStrGUIDatepickerDialog = "EEEE, dd.MM.yyyy"; 
    final String minDateAvailable = "01.01.2005"; 
    // Initializiation 
    LayoutInflater inflater = (LayoutInflater) getLayoutInflater(); 
    final AlertDialog.Builder dialogBuilder = new AlertDialog.Builder(this); 
    View customView = inflater.inflate(R.layout.activity_dateselect_dialog, null); 
    dialogBuilder.setView(customView); 
    final DatePicker datePicker = (DatePicker) customView.findViewById(R.id.activity_thumbnail_dateselect_dialog_datepicker); 
    final TextView dateTextView = (TextView) customView.findViewById(R.id.activity_thumbnail_dateselect_dialog_dateview); 
    final SimpleDateFormat dateTextViewFormatter = new SimpleDateFormat(Constants.dateFormatStrGUIDatepickerDialog, Locale.GERMANY); 
    // Minimum date 
    SimpleDateFormat formatter = new SimpleDateFormat(Constants.dateFormatStrGUI, Locale.GERMANY); 
    Calendar minDate = Calendar.getInstance(); 
    try { 
     minDate.setTime(formatter.parse(Constants.minDateAvailable)); 
    } catch (ParseException e) { 
     e.printStackTrace(); 
    } 
    datePicker.setMinDate(minDate.getTimeInMillis()); 
    // View settings 
    dialogBuilder.setTitle("Choose date"); 
    Calendar choosenDate = Calendar.getInstance(); 
    int year = choosenDate.get(Calendar.YEAR); 
    int month = choosenDate.get(Calendar.MONTH); 
    int day = choosenDate.get(Calendar.DAY_OF_MONTH); 
    try { 
     Date choosenDateFromUI = formatter.parse(newspaperDatePickerButton.getText().toString()); 
     choosenDate.setTime(choosenDateFromUI); 
     year = choosenDate.get(Calendar.YEAR); 
     month = choosenDate.get(Calendar.MONTH); 
     day = choosenDate.get(Calendar.DAY_OF_MONTH); 
    } catch (Exception e) { 
     e.printStackTrace(); 
    } 
    Calendar dateToDisplay = Calendar.getInstance(); 
    dateToDisplay.set(year, month, day); 
    dateTextView.setText(dateTextViewFormatter.format(dateToDisplay.getTime())); 
    // Buttons 
    dialogBuilder.setNegativeButton("today", new DialogInterface.OnClickListener() { 
     @Override 
     public void onClick(DialogInterface dialog, int which) { 
      newspaperDatePickerButton.setText(R.string.date_latest_identifier); 
      newspaperDate = getString(R.string.date_latest_identifier); 
      controller.loadNewspaper(newspaperDate, model.getSubscriptions().get(newspaperEditionPosition), true); 
      dialog.dismiss(); 
     } 
    }); 
    dialogBuilder.setPositiveButton("Apply", new DialogInterface.OnClickListener() { 
     @Override 
     public void onClick(DialogInterface dialog, int which) { 
      SimpleDateFormat formatter = new SimpleDateFormat(Constants.dateFormatStrGUI, Locale.GERMANY); 
      Calendar now = Calendar.getInstance(); 
      Calendar choosen = Calendar.getInstance(); 
      choosen.set(datePicker.getYear(), datePicker.getMonth(), datePicker.getDayOfMonth()); 
      if (now.compareTo(choosen) == 0) { 
       newspaperDate = getString(R.string.date_latest_identifier); 
       newspaperDatePickerButton.setText(newspaperDate); 
      } else { 
       newspaperDate = formatter.format(choosen.getTime()); 
       newspaperDatePickerButton.setText(newspaperDate); 
      } 
      controller.loadNewspaper(newspaperDate, model.getSubscriptions().get(newspaperEditionPosition), false); 
      dialog.dismiss(); 
     } 
    }); 
    final AlertDialog dialog = dialogBuilder.create(); 
    // Datepicker 
    datePicker.init(year, month, day, new DatePicker.OnDateChangedListener() { 
     public void onDateChanged(DatePicker view, int year, int monthOfYear, int dayOfMonth) { 
      Calendar choosenDate = Calendar.getInstance(); 
      choosenDate.set(year, monthOfYear, dayOfMonth); 
      Calendar now = Calendar.getInstance(); 
      dateTextView.setText(dateTextViewFormatter.format(choosenDate.getTime())); 
      if (choosenDate.get(Calendar.DAY_OF_WEEK) == Calendar.SUNDAY || now.compareTo(choosenDate) < 0) { 
       dateTextView.setTextColor(Color.parseColor("#ff0000")); 
       ((Button) dialog.getButton(AlertDialog.BUTTON_POSITIVE)).setEnabled(false); 
      } else { 
       dateTextView.setTextColor(Color.parseColor("#000000")); 
       ((Button) dialog.getButton(AlertDialog.BUTTON_POSITIVE)).setEnabled(true); 
      } 
     } 
    }); 
    // Finish 
    dialog.show(); 
} 

布局

<TextView 
     android:id="@+id/activity_thumbnail_dateselect_dialog_dateview" 
     android:layout_width="wrap_content" 
     android:layout_height="wrap_content" 
     android:textAppearance="?android:attr/textAppearanceLarge" 
     android:layout_margin="12dp" 
     android:text="" 
     android:layout_gravity="center"/> 

<DatePicker 
     android:id="@+id/activity_thumbnail_dateselect_dialog_datepicker" 
     android:layout_width="wrap_content" 
     android:layout_height="wrap_content" 
     android:layout_gravity="center" 
     android:calendarViewShown="false"/>