如何在android中的日期选择器中显示年份

Question

任何人都可以告诉我如何在android中的日期选择器中显示年份

谢谢

Answer 1

首先，创建MonthYearPickerDialog.java类扩展与 DialogFragment

public class MonthYearPickerDialog extends DialogFragment {

private static final int MAX_YEAR = 2099;
private DatePickerDialog.OnDateSetListener listener;

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

@SuppressLint("ResourceAsColor")
@Override
public Dialog onCreateDialog(Bundle savedInstanceState) {
    AlertDialog.Builder builder = new AlertDialog.Builder(getActivity(), R.style.AlertDialogStyle);
    LayoutInflater inflater = getActivity().getLayoutInflater();

    Calendar cal = Calendar.getInstance();

    View dialog = inflater.inflate(R.layout.month_year_picker_dialog, null);
    final NumberPicker monthPicker = (NumberPicker) dialog.findViewById(R.id.picker_month);
    final NumberPicker yearPicker = (NumberPicker) dialog.findViewById(R.id.picker_year);

    monthPicker.setMinValue(1);
    monthPicker.setMaxValue(12);
    monthPicker.setValue(cal.get(Calendar.MONTH) + 1);

    int year = cal.get(Calendar.YEAR);
    yearPicker.setMinValue(1900);
    yearPicker.setMaxValue(3500);
    yearPicker.setValue(year);

    builder.setView(dialog).setPositiveButton(Html.fromHtml("<font color='#FF4081'>Ok</font>"), new DialogInterface.OnClickListener() {
        @Override
        public void onClick(DialogInterface dialog, int id) {
            listener.onDateSet(null, yearPicker.getValue(), monthPicker.getValue(), 0);
        }
    }).setNegativeButton(Html.fromHtml("<font color='#FF4081'>Cancel</font>"), new DialogInterface.OnClickListener() {
        public void onClick(DialogInterface dialog, int id) {
            MonthYearPickerDialog.this.getDialog().cancel();
        }
    });
    return builder.create();
   }
 }

在styles.xml 中粘贴此代码。

  <style name="AlertDialogStyle" parent="Theme.AppCompat.Light.Dialog">
    <item name="android:textColor">#FF4081</item>  // you can change the color of the yearPiker dialog
    <item name="android:textColorPrimary">#FF4081</item> // you can change the color of the yearPiker dialog
  </style>

创建month_year_picker_dialog.xml

<?xml version="1.0" encoding="utf-8"?><LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="220dp"
android:layout_height="300dp"
android:layout_gravity="center"
android:gravity="center"
android:orientation="vertical">


<LinearLayout
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:orientation="vertical">

    <LinearLayout
        android:layout_width="match_parent"
        android:layout_height="70dp"
        android:background="@color/colorAccent"
        android:gravity="top">

        <TextView
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:layout_gravity="center"
            android:elevation="8dp"
            android:gravity="center"
            android:text="Year"
            android:textColor="#ffffff"
            android:textSize="22dp"
            android:textStyle="bold" />

    </LinearLayout>

    <LinearLayout
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_gravity="center"
        android:orientation="horizontal">

        <NumberPicker
            android:id="@+id/picker_month"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:layout_marginEnd="20dp"
            android:descendantFocusability="blocksDescendants"
            android:visibility="gone"
            tools:ignore="RtlCompat">

        </NumberPicker>

        <NumberPicker
            android:id="@+id/picker_year"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:descendantFocusability="blocksDescendants"
            >

        </NumberPicker>

      </LinearLayout>

   </LinearLayout>

</LinearLayout>

在您的主要课程（活动）中

 private DatePickerDialog createDialogWithoutDateField() {
    DatePickerDialog dpd = new DatePickerDialog(this, null, 2014, 1, 24);
    try {
        java.lang.reflect.Field[] datePickerDialogFields = dpd.getClass().getDeclaredFields();
        for (java.lang.reflect.Field datePickerDialogField : datePickerDialogFields) {
            if (datePickerDialogField.getName().equals("mDatePicker")) {
                datePickerDialogField.setAccessible(true);
                DatePicker datePicker = (DatePicker) datePickerDialogField.get(dpd);
                java.lang.reflect.Field[] datePickerFields = datePickerDialogField.getType().getDeclaredFields();
                for (java.lang.reflect.Field datePickerField : datePickerFields) {
                    Log.i("test", datePickerField.getName());
                    if ("mDaySpinner".equals(datePickerField.getName())) {
                        datePickerField.setAccessible(true);
                        Object dayPicker = datePickerField.get(datePicker);
                        ((View) dayPicker).setVisibility(View.GONE);
                    }
                }
            }
        }
    }
    catch (Exception ex) {
    }
    return dpd;
}

最后，随心所欲地打电话

createDialogWithoutDateField().show();

Answer 2

你也可以使用一些简单的反射隐藏日期和月份NumberPicker一个第DatePicker部件.请注意,如果Google决定重命名成员字段名称,则可能会停止工作.此外,这种方法当然在使用时也很有意义android:datePickerMode="spinner".

// inflate DatePicker, or e.g. get it from a DatePickerDialog:
DatePicker datepicker = ...

// pre-Honeycomb fields: 
findAndHideField(datepicker, "mDayPicker");
findAndHideField(datepicker, "mMonthPicker");

// Honeycomb(+) fields:
findAndHideField(datepicker, "mDaySpinner");
findAndHideField(datepicker, "mMonthSpinner");

// Lollipop(+) fields (wrapped in a delegate):
final Object mDatePickerDelegate = findFieldInstance(picker, "mDelegate");
findAndHideField(mDatePickerDelegate, "mDaySpinner");
findAndHideField(mDatePickerDelegate, "mMonthSpinner");


/** find a member field by given name and hide it */
private static void findAndHideField(Object object, String name) {
    try {
        final Field field = object.getClass().getDeclaredField(name);
        field.setAccessible(true);
        final View fieldInstance = (View) field.get(object);
        fieldInstance.setVisibility(View.GONE);
    } catch (Exception e) {
        e.printStackTrace();
    }
}

/* find a member field by given name and return its instance value */
private static Object findFieldInstance(DatePicker datepicker, String name) {
    try {
        final Field field = DatePicker.class.getDeclaredField(name);
        field.setAccessible(true);
        return field.get(datepicker);
    } catch (Exception e) {
        e.printStackTrace();
        return null;
    }
}

更新:添加了说明如何使此方法适用于Android'Lollipop'5.0(API 21+)的代码.

免责声明:我不能强调这是一个hacky解决方案,可能会停止使用任何框架更新(就像Android 3.0首次推出时一样,再次使用Android 5.0).