我最近将android studio更新为4.2.2，从那以后，我在编辑器中加载特定的xml布局文件时出错。我在组件树或设计窗口中没有看到任何内容。

这是我看到的图像。
打开问题窗格时，我看到两个错误：“渲染问题”和“字符串索引超出范围：-1”。当我打开错误时，会收到以下消息：

java.lang.reflect.InvocationTargetException
    at jdk.internal.reflect.GeneratedMethodAccessor102.invoke(Unknown Source)
    at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
    at java.base/java.lang.reflect.Method.invoke(Method.java:566)
    at android.view.BridgeInflater.lambda$createViewFromCustomInflater$0(BridgeInflater.java:259)
    at android.view.BridgeInflater.createViewFromCustomInflater(BridgeInflater.java:285)
    at android.view.BridgeInflater.onCreateView(BridgeInflater.java:122)
    at android.view.LayoutInflater.onCreateView(LayoutInflater.java:928)
    at android.view.LayoutInflater.onCreateView(LayoutInflater.java:948)
    at android.view.LayoutInflater.createViewFromTag(LayoutInflater.java:1002)
    at android.view.BridgeInflater.createViewFromTag(BridgeInflater.java:309)
    at android.view.LayoutInflater.createViewFromTag(LayoutInflater.java:959)
    at android.view.LayoutInflater.rInflate_Original(LayoutInflater.java:1121)
    at android.view.LayoutInflater_Delegate.rInflate(LayoutInflater_Delegate.java:72)
    at android.view.LayoutInflater.rInflate(LayoutInflater.java:1095)
    at android.view.LayoutInflater.rInflateChildren(LayoutInflater.java:1082)
    at android.view.LayoutInflater.inflate(LayoutInflater.java:680)
    at android.view.LayoutInflater.inflate(LayoutInflater.java:499)
    at com.android.layoutlib.bridge.impl.RenderSessionImpl.inflate(RenderSessionImpl.java:354)
    at com.android.layoutlib.bridge.Bridge.createSession(Bridge.java:431)
    at com.android.tools.idea.layoutlib.LayoutLibrary.createSession(LayoutLibrary.java:141)
    at com.android.tools.idea.rendering.RenderTask.createRenderSession(RenderTask.java:710)
    at com.android.tools.idea.rendering.RenderTask.lambda$inflate$6(RenderTask.java:865)
    at com.android.tools.idea.rendering.RenderExecutor$runAsyncActionWithTimeout$2.run(RenderExecutor.kt:174)
    at java.base/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1128)
    at java.base/java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:628)
    at java.base/java.lang.Thread.run(Thread.java:834)
Caused by: java.lang.StringIndexOutOfBoundsException: String index out of range: -1
    at java.base/java.lang.StringLatin1.charAt(StringLatin1.java:47)
    at java.base/java.lang.String.charAt(String.java:693)
    at android.content.res.BridgeTypedArray.getType(BridgeTypedArray.java:1024)
    at android.content.res.BridgeTypedArray.getType(BridgeTypedArray.java:809)
    at android.content.res.BridgeTypedArray.getValue(BridgeTypedArray.java:778)
    at android.content.res.BridgeTypedArray.peekValue(BridgeTypedArray.java:847)
    at android.view.View.<init>(View.java:5951)
    at android.widget.TextView.<init>(TextView.java:996)
    at android.widget.EditText.<init>(EditText.java:87)
    at android.widget.EditText.<init>(EditText.java:83)
    at androidx.appcompat.widget.AppCompatEditText.<init>(AppCompatEditText.java:74)
    at androidx.appcompat.widget.AppCompatEditText.<init>(AppCompatEditText.java:69)
    at androidx.appcompat.app.AppCompatViewInflater.createEditText(AppCompatViewInflater.java:209)
    at androidx.appcompat.app.AppCompatViewInflater.createView(AppCompatViewInflater.java:127)
    ... 26 more

这是我在xml文件中的代码：

<?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:layout_width="match_parent"
    android:layout_height="match_parent"
    tools:context=".AddReminderActivity"
    tools:ignore="HardcodedText, RtlSymmetry">

    <EditText
        android:id="@+id/etEditTitle"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:layout_marginStart="30dp"
        android:layout_marginTop="20dp"
        android:layout_marginEnd="30dp"
        android:autofillHints=""
        android:ems="10"
        android:hint="Remind me to..."
        android:inputType="textPersonName"
        android:paddingEnd="20dp"
        android:textColor="@color/text_grey"
        android:textSize="25sp"
        app:layout_constraintEnd_toEndOf="parent"
        app:layout_constraintStart_toStartOf="parent"
        app:layout_constraintTop_toTopOf="parent" />

    <Button
        android:id="@+id/btnEditDate"
        android:layout_width="190dp"
        android:layout_height="wrap_content"
        android:layout_marginStart="5dp"
        android:layout_marginTop="30dp"

        android:backgroundTint="@color/white"
        android:text="Date Date Date"
        android:textAlignment="center"
        android:textAllCaps="false"
        android:textAppearance="@style/TextAppearance.AppCompat.Display1"
        android:textColor="@color/text_grey"
        android:textSize="18sp"
        app:layout_constraintEnd_toEndOf="parent"
        app:layout_constraintHorizontal_bias="0.05"
        app:layout_constraintStart_toStartOf="parent"
        app:layout_constraintTop_toBottomOf="@+id/etEditTitle" />

    <Button
        android:id="@+id/btnEditTime"
        android:layout_width="130dp"
        android:layout_height="wrap_content"

        android:layout_marginTop="30dp"
        android:backgroundTint="@color/white"
        android:text="Time Time"
        android:textAlignment="center"
        android:textAllCaps="false"
        android:textAppearance="@style/TextAppearance.AppCompat.Display1"
        android:textColor="@color/text_grey"
        android:textSize="18sp"
        app:layout_constraintEnd_toEndOf="parent"
        app:layout_constraintStart_toEndOf="@+id/btnEditDate"
        app:layout_constraintTop_toBottomOf="@+id/etEditTitle" />

    <Spinner
        android:id="@+id/spEditRepeat"
        android:layout_width="200dp"
        android:layout_height="wrap_content"
        android:layout_marginStart="120dp"
        android:layout_marginTop="121dp"
        android:spinnerMode="dropdown"
        app:layout_constraintEnd_toEndOf="parent"
        app:layout_constraintStart_toStartOf="parent"
        app:layout_constraintTop_toBottomOf="@+id/etEditTitle" />

    <com.google.android.material.floatingactionbutton.FloatingActionButton
        android:id="@+id/fabSaveReminder"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_marginEnd="16dp"
        android:layout_marginBottom="16dp"
        android:clickable="true"
        app:layout_constraintBottom_toBottomOf="parent"
        app:layout_constraintEnd_toEndOf="parent"
        app:srcCompat="@android:drawable/ic_menu_save"
        android:focusable="true"
        android:contentDescription="Save reminder" />

    <TextView
        android:id="@+id/tvRepeatLabel"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_marginTop="120dp"
        android:text="Repeat Style:"
        android:textColor="@color/text_grey"
        android:textSize="18sp"
        app:layout_constraintEnd_toStartOf="@+id/spEditRepeat"
        app:layout_constraintHorizontal_bias="0.508"
        app:layout_constraintStart_toStartOf="parent"
        app:layout_constraintTop_toBottomOf="@+id/etEditTitle" />

</androidx.constraintlayout.widget.ConstraintLayout>

当我启动应用程序时，我可以在我的android设备上看到完美的布局。所以我不太确定问题出在哪里。
还有一个新的渲染引擎已经添加到这个新的更新中，但我已经尝试在“设置->实验对话框”中关闭它，没有什么区别。
我真的很感激对我的问题给予的任何帮助！！
谢谢：-）