如何更改Android PopupMenu宽度

我无法更改Appcompat PopupMenu的宽度,因为菜单项在 MenuPopupHelper.java中使用此布局abc_popup_menu_item_layout.xml,它将菜单项minWidth设置为196dip.

<android.support.v7.internal.view.menu.ListMenuItemView
        xmlns:android="http://schemas.android.com/apk/res/android"
        android:layout_width="fill_parent"
        android:layout_height="?attr/dropdownListPreferredItemHeight"
        android:minWidth="196dip"
        android:paddingRight="16dip">

我试图在style.xml的以下属性中覆盖minWidth和dropDownWidth.我也尝试在android：dropDownItemStyle中覆盖minWidth,但它没有帮助.我开始怀疑是否可以覆盖ListMenuItemView的这个硬编码属性.有没有人成功修改PopupMenu宽度？

<style name="OrderDetailsActivity" parent="AppTheme">
    <item name="android:textAppearanceLargePopupMenu">@style/OrderDetailsPopupMenuTextAppearanceLarge</item>
    <item name="android:textAppearanceSmallPopupMenu">@style/OrderDetailsPopupMenuTextAppearanceSmall</item>
    <item name="android:dropdownlistviewStyle">@style/OrderDetailsListDropDownStyle</item>
    <item name="dropdownlistviewStyle">@style/OrderDetailsListDropDownStyle</item>
</style>

<style name="OrderDetailsPopupMenuTextAppearanceLarge" parent="@android:style/TextAppearance.DeviceDefault.Widget.PopupMenu.Large">
    <item name="android:fontFamily">sans-serif-medium</item>
    <item name="android:textSize">@dimen/font_size_medium</item>
</style>

<style name="OrderDetailsPopupMenuTextAppearanceSmall" parent="@android:style/TextAppearance.DeviceDefault.Widget.PopupMenu.Small">
    <item name="android:fontFamily">sans-serif-medium</item>
    <item name="android:textSize">@dimen/font_size_medium</item>
</style>

<style name="OrderDetailsListDropDownStyle" parent="Widget.AppCompat.ListView.DropDown">
    <item name="android:divider">@drawable/list_divider</item>
</style>

解决方法

您可以准备自定义弹出菜单项布局文件,并使用Application类的onCreate()方法中的反射更新此静态字段：

private void updatePopUpMenuItemLayout() {
    try {
        Field field = MenuPopupHelper.class.getDeclaredField("ITEM_LAYOUT");
        field.setAccessible(true);
        field.set(null,R.layout.custom_popup_menu_item_layout);
    } catch (Exception e) {
        Log.e("TAG",e.getMessage());
    }
}