<!-- 原来是这样 --><androidx.constraintlayout.widget.ConstraintLayoutxmlns: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/main"android:layout_width="match_parent"android:layout_height="match_parent"tools:context=".activity.MainActivity"><Buttonandroid:id="@+id/btn_go_test"android:layout_width="wrap_content"android:layout_height="wrap_content"android:text="前往测试"/></androidx.constraintlayout.widget.ConstraintLayout><!-- 修改成这样 --><androidx.constraintlayout.widget.ConstraintLayoutxmlns: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/main"android:layout_width="match_parent"android:layout_height="match_parent"tools:context=".activity.MainActivity"><Buttonandroid:id="@+id/btn_go_test"android:layout_width="wrap_content"android:layout_height="wrap_content"android:text="前往测试"app:layout_constraintBottom_toBottomOf="parent"/></androidx.constraintlayout.widget.ConstraintLayout>- 对上述布局代码进行修改之后,Android Studio 出现如下错误信息,同时无法预览布局
com.intellij.openapi.diagnostic.RuntimeExceptionWithAttachments: Access from Event Dispatch Thread (EDT) is not allowed; see https://jb.gg/ij-platform-threading for details Current thread: Thread[#57,AWT-EventQueue-0,10,main] 254734910 (EventQueue.isDispatchThread()=true) SystemEventQueueThread: (same)问题原因
- 这个错误是 Android Studio 的一个 Bug,与布局代码本身无关
处理策略
- 清理项目(Clean Project),即可正常预览布局