隐藏掉DatePicker 的日期

/**

• 日期选择

• @author 某人
  */
  public class ExpirationDialog extends DialogFragment {
  private String pickerTime;

  ExpirationDialog expirationDialog;
  @BindView(R.id.picker_date)
  DatePicker datePicker;
  @BindView(R.id.pickerCancel)
  TextView pickerCancel;
  @BindView(R.id.pickerCommite)
  TextView pickerCommite;

  Unbinder unbinder;
  private int mYear, mMonth, mDay;

  public static ExpirationDialog newInstance() {

   return new ExpirationDialog();
  

  }

  @Override
  public void onStart() {
  super.onStart();
  Window window = getDialog().getWindow();
  WindowManager.LayoutParams params = window.getAttributes();
  params.gravity = Gravity.BOTTOM;
  params.width = WindowManager.LayoutParams.MATCH_PARENT;
  window.setAttributes(params);
  window.setBackgroundDrawable(new ColorDrawable(Color.TRANSPARENT));
  }

  private void init() {
  datePicker.init(datePicker.getYear(), datePicker.getMonth(), datePicker.getDayOfMonth(), new DatePicker.OnDateChangedListener() {
  @Override
  public void onDateChanged(DatePicker view, int year, int monthOfYear, int dayOfMonth) {
  // 获取一个日历对象，并初始化为当前选中的时间
  Calendar calendar = Calendar.getInstance();
  calendar.set(year, monthOfYear, dayOfMonth);
  SimpleDateFormat format = new SimpleDateFormat(
  "yyyy-MM");
  pickerTime = format.format(calendar.getTime());

       }
   });
   hideDay(datePicker);
  

  }

  @Override
  public View onCreateView(LayoutInflater inflater, ViewGroup container,
  Bundle savedInstanceState) {
  // Inflate the layout for this fragment
  View view = inflater.inflate(R.layout.fragment_expiration_dialog, container, false);
  AnimationUtils.slideToUp(view);
  unbinder = ButterKnife.bind(this, view);
  init();
  return view;
  }

private void hideDay(DatePicker mDatePicker) {
    try {
        /* 处理android5.0以上的特殊情况 */
        if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.LOLLIPOP) {
            //根据FindView方式去获取DayView
            int daySpinnerId = Resources.getSystem().getIdentifier("day", "id", "android");
            if (daySpinnerId != 0) {
                View daySpinner = mDatePicker.findViewById(daySpinnerId);
                if (daySpinner != null) {
                    daySpinner.setVisibility(View.GONE);
                }
            }
        } else {
            //根据反射的方法去获取DayView字段
            Field[] datePickerfFields = mDatePicker.getClass().getDeclaredFields();
            for (Field datePickerField : datePickerfFields) {
                if ("mDaySpinner".equals(datePickerField.getName()) || ("mDayPicker").equals(datePickerField.getName())) {
                    datePickerField.setAccessible(true);
                    Object dayPicker = new Object();
                    try {
                        dayPicker = datePickerField.get(mDatePicker);
                    } catch (IllegalAccessException e) {
                        e.printStackTrace();
                    } catch (IllegalArgumentException e) {
                        e.printStackTrace();
                    }
                    ((View) dayPicker).setVisibility(View.GONE);
                }
            }
        }
    } catch (Exception e) {
        e.printStackTrace();
    }
}

@Override
public void onDestroyView() {
    super.onDestroyView();
    unbinder.unbind();
}

@OnClick({R.id.pickerCancel, R.id.pickerCommite})
public void onClick(View view) {
    switch (view.getId()) {
        case R.id.pickerCancel:
            break;
        case R.id.pickerCommite:
            if (!TextUtils.isEmpty(pickerTime)) {
                if (dialogResult != null) {
                    dialogResult.finish(pickerTime);
                }
            } else {
                MyToast.show(getContext(), "未选择日期！");
            }
            break;
        default:
    }
    dismiss();
}

public interface ExpirationDialogInterface {
    void finish(String result);
}

private ExpirationDialogInterface dialogResult;

public void setDialogResult(ExpirationDialogInterface dialogResult) {
    this.dialogResult = dialogResult;
}

}