app:布局约束值在xml源代码视图中始终显示为未定义-AndroidStudio 3.2

我的布局文件:

<?xml version="1.0" encoding="utf-8"?>
<layout 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">

    <data>
        <variable
            name="profile"
            type="android.arch.lifecycle.MutableLiveData&lt;myapp.UserProfileDetails&gt;"/>
    </data>

    <ScrollView
        android:id="@+id/scrollViewProfileContainer"
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:fillViewport="true">

    <android.support.constraint.ConstraintLayout
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:fillViewport="true"
        tools:context=".UserProfileEditActivity">

        <ImageView
            android:id="@+id/imageViewProfileAvatar"
            android:layout_width="100dp"
            android:layout_height="100dp"
            android:layout_marginEnd="8dp"
            android:layout_marginStart="8dp"
            android:layout_marginTop="8dp"
            android:scaleType="fitXY"
            app:layout_constraintEnd_toEndOf="parent"
            app:layout_constraintHorizontal_bias="0.0"
            app:layout_constraintStart_toStartOf="parent"
            app:layout_constraintTop_toTopOf="parent"
            app:srcCompat="@drawable/com_facebook_profile_picture_blank_square"/>

        <TextView
            android:id="@+id/textView9"
            android:layout_width="0dp"
            android:layout_height="wrap_content"
            android:layout_marginBottom="8dp"
            android:layout_marginEnd="8dp"
            android:layout_marginStart="8dp"
            android:layout_marginTop="16dp"
            android:text="@{profile.name + ' ' + profile.lastName}"
            android:textAlignment="viewStart"
            android:ellipsize="end"
            android:maxLines="2"
            android:textAppearance="@android:style/TextAppearance.Material.Display1"
            app:layout_constraintBottom_toBottomOf="@+id/imageViewProfileAvatar"
            app:layout_constraintEnd_toEndOf="parent"
            app:layout_constraintStart_toEndOf="@+id/imageViewProfileAvatar"
            app:layout_constraintTop_toTopOf="parent"/>

        <TextView
            android:id="@+id/textView11"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:layout_marginEnd="8dp"
            android:layout_marginStart="8dp"
            android:layout_marginTop="32dp"
            android:text="@string/label_profile_name"
            app:layout_constraintEnd_toEndOf="parent"
            app:layout_constraintHorizontal_bias="0.0"
            app:layout_constraintStart_toStartOf="parent"
            app:layout_constraintTop_toBottomOf="@+id/imageViewProfileAvatar"/>

        <EditText
            android:id="@+id/editText3"
            android:layout_width="0dp"
            android:layout_height="wrap_content"
            android:layout_marginEnd="8dp"
            android:layout_marginStart="8dp"
            android:ems="10"
            android:inputType="textPersonName"
            android:text="@={profile.name}"
            android:maxLength="15"
            app:layout_constraintEnd_toEndOf="parent"
            app:layout_constraintHorizontal_bias="0.0"
            app:layout_constraintStart_toStartOf="parent"
            app:layout_constraintTop_toBottomOf="@+id/textView11"/>

        <TextView
            android:id="@+id/textView12"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:layout_marginEnd="8dp"
            android:layout_marginStart="8dp"
            android:layout_marginTop="8dp"
            android:text="@string/label_profile_last_name"
            app:layout_constraintEnd_toEndOf="parent"
            app:layout_constraintHorizontal_bias="0.0"
            app:layout_constraintStart_toStartOf="parent"
            app:layout_constraintTop_toBottomOf="@+id/editText3"/>

        <EditText
            android:id="@+id/editText5"
            android:layout_width="0dp"
            android:layout_height="wrap_content"
            android:layout_marginEnd="8dp"
            android:layout_marginStart="8dp"
            android:ems="10"
            android:inputType="textPersonName"
            android:text="@={profile.lastName}"
            android:maxLength="30"
            app:layout_constraintEnd_toEndOf="parent"
            app:layout_constraintHorizontal_bias="0.0"
            app:layout_constraintStart_toStartOf="parent"
            app:layout_constraintTop_toBottomOf="@+id/textView12"/>

        <TextView
            android:id="@+id/textView13"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:layout_marginEnd="8dp"
            android:layout_marginStart="8dp"
            android:layout_marginTop="8dp"
            android:text="@string/label_profile_phone"
            app:layout_constraintEnd_toEndOf="parent"
            app:layout_constraintHorizontal_bias="0.0"
            app:layout_constraintStart_toStartOf="parent"
            app:layout_constraintTop_toBottomOf="@+id/editText5"/>

        <EditText
            android:id="@+id/editText6"
            android:layout_width="0dp"
            android:layout_height="wrap_content"
            android:layout_marginEnd="8dp"
            android:layout_marginStart="8dp"
            android:ems="10"
            android:maxLength="32"
            android:inputType="phone"
            android:text="@={profile.phone}"
            app:layout_constraintEnd_toEndOf="parent"
            app:layout_constraintHorizontal_bias="0.0"
            app:layout_constraintStart_toStartOf="parent"
            app:layout_constraintTop_toBottomOf="@+id/textView13"/>

    </android.support.constraint.ConstraintLayout>
    </ScrollView>
</layout>

app:layout_constraintBottom_toBottomOf="@+id/imageViewProfileAvatar" 在源代码视图中高亮显示为红色,例如:

无法解析符号“@+id/imageViewProfileAvatar”

这是在升级到androidstudio3.2之后开始的。你知道吗?挺烦人的。我试过:重建应用程序,使缓存失效,重新同步到gradle,都没用。

约束布局已添加到构建.gradle具体如下:

implementation 'com.android.support.constraint:constraint-layout:1.1.2'