Android横竖屏布局问题：layout-land下layout.xml未被识别报错

问题场景 #

我开发了一个视频展示功能，点击对应的ImageButton可播放指定视频，但横竖屏切换时存在异常。为解决该问题，我参照相关内容创建了layout-land文件夹及layout.xml文件，并完整复制了activity_main.xml的内容。但设备旋转时，应用无法识别并加载横屏布局，同时出现报错：

The layout "layout" in layout-land has no declaration in the base layout folder; this can lead to crashes when the resource is queried in a configuration that does not match this qualifier

已尝试的解决方法 #

• 重新复制粘贴XML代码
• 同步Gradle项目
• 清除应用缓存
• 重启应用及开发电脑
• 修改XML文件ID与主布局保持一致

布局代码 #

<?xml version="1.0" encoding="utf-8"?>
<androidx.constraintlayout.widget.ConstraintLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    xmlns:tools="http://schemas.android.com/tools"
    android:id="@+id/layout"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    tools:context=".MainActivity">

<ImageButton
    android:id="@+id/imageButton1"
    android:layout_width="150dp"
    android:layout_height="150dp"
    android:layout_marginEnd="520dp"
    android:onClick="Click1"
    android:src="@drawable/placeholder1"
    app:layout_constraintBottom_toBottomOf="parent"
    app:layout_constraintEnd_toEndOf="parent"
    app:layout_constraintStart_toStartOf="parent"
    app:layout_constraintTop_toTopOf="parent"
    tools:ignore="SpeakableTextPresentCheck"
    tools:srcCompat="@tools:sample/avatars" />

<ImageButton
    android:id="@+id/imageButton2"
    android:layout_width="150dp"
    android:layout_height="150dp"
    android:layout_marginEnd="170dp"
    android:onClick="Click2"
    android:src="@drawable/placeholder2"
    app:layout_constraintBottom_toBottomOf="@+id/videoView1"
    app:layout_constraintEnd_toEndOf="parent"
    app:layout_constraintStart_toStartOf="parent"
    app:layout_constraintTop_toTopOf="parent"
    tools:ignore="SpeakableTextPresentCheck"
    tools:srcCompat="@tools:sample/avatars" />

<ImageButton
    android:id="@+id/imageButton3"
    android:layout_width="150dp"
    android:layout_height="150dp"
    android:layout_marginStart="170dp"
    android:onClick="Click3"
    android:src="@drawable/placeholder3"
    app:layout_constraintBottom_toBottomOf="parent"
    app:layout_constraintEnd_toEndOf="parent"
    app:layout_constraintStart_toStartOf="parent"
    app:layout_constraintTop_toTopOf="parent"
    tools:ignore="SpeakableTextPresentCheck"
    tools:srcCompat="@tools:sample/avatars" />

<ImageButton
    android:id="@+id/imageButton4"
    android:layout_width="150dp"
    android:layout_height="150dp"
    android:layout_marginStart="520dp"
    android:onClick="Click4"
    android:src="@drawable/placeholder4"
    app:layout_constraintBottom_toBottomOf="parent"
    app:layout_constraintEnd_toEndOf="parent"
    app:layout_constraintStart_toStartOf="parent"
    app:layout_constraintTop_toTopOf="parent"
    tools:ignore="SpeakableTextPresentCheck"
    tools:srcCompat="@tools:sample/avatars" />

<VideoView
    android:id="@+id/videoView1"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:orientation="vertical"
    android:visibility="invisible"
    app:layout_constraintBottom_toBottomOf="parent"
    app:layout_constraintEnd_toEndOf="parent"
    app:layout_constraintHorizontal_bias="0.0"
    app:layout_constraintStart_toStartOf="parent"
    app:layout_constraintTop_toTopOf="parent"
    app:layout_constraintVertical_bias="0.0" />
</androidx.constraintlayout.widget.ConstraintLayout>

额外疑问 #

第一次使用代码片段，如何设置语法高亮？

内容的提问来源于stack exchange，提问作者Mikkel G Hansen