Android:XML文件的设计视图为白色和空白 [英] Android: Design view of XML file is white and blank

问题描述

我在res文件夹下创建了一个菜单文件夹，然后在该菜单文件夹中创建了一个名为抽屉文件.这是该文件的文本:

I created a menu folder under res folder and, in that menu folder, I created a file called drawer_menu.xml. This is the text of that file:

<?xml version="1.0" encoding="utf-8"?>
<menu xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    tools:showIn="navigation_view">

    <group
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:checkableBehavior="single">
        <item
            android:id="@+id/nav_profile"
            android:icon="@drawable/ic_profile"
            android:title="Message" />
        <item
            android:id="@+id/nav_my_events"
            android:icon="@drawable/ic_my_events"
            android:title="Chat" />

    </group>

    <item android:title="Communicate">
        <menu>
            <item
                android:id="@+id/nav_settings"
                android:icon="@drawable/ic_settings"
                android:title="Share" />
            <item
                android:id="@+id/nav_logout"
                android:icon="@drawable/ic_logout"
                android:title="Send" />
        </menu>
    </item>

</menu>

但是设计视图为白色和空白.没有显示任何元素.我也看不到通常在布局xml文件中显示的AppThemes选项.

But the design view is white and blank. No element shows up.Also I don't get to see AppThemes option which usually shows up in layout xml files.

推荐答案

我正在使用Android Studio Canary 3.2，看起来像这样.

I am using Android Studio Canary 3.2 and looks like that.

所以，也许是您的Android Studio版本的错误.

So maybe is a bug of your Android Studio version.

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