以下類不能被實例化：android.support.constraint.ConstraintLayout

我有使用過Android Studio 3金絲雀4和搖籃4的最新版本constraintlayout和一個TextView的基本佈局以下類不能被實例化：android.support.constraint.ConstraintLayout

SDK：26

supportLibrary：26.0.0-β2

gradle

implementation 'com.android.support.constraint:constraint-layout:1.0.2'

layout

<?xml version="1.0" encoding="utf-8"?> 
<android.support.constraint.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"> 

    <TextureView 
     android:id="@+id/textureView" 
     android:layout_width="wrap_content" 
     android:layout_height="wrap_content" 
     tools:layout_editor_absoluteX="190dp" 
     tools:layout_editor_absoluteY="232dp" 
     app:layout_constraintTop_toTopOf="parent" 
     app:layout_constraintBottom_toBottomOf="parent" 
     app:layout_constraintHorizontal_bias="0.5" 
     app:layout_constraintStart_toStartOf="parent" 
     app:layout_constraintEnd_toEndOf="parent" 
     /> 
</android.support.constraint.ConstraintLayout>

styles.xml

<style name="AppThemeWhite" parent="Base.Theme.AppCompat.Light.DarkActionBar"> 
    <item name="colorPrimary">@color/white</item> 
    <item name="colorPrimaryDark">@color/main_color_500</item> 
    <item name="colorAccent">@color/white</item> 
    <item name="android:textColorPrimary">@color/main_color_500</item> 
    <item name="windowActionBar">false</item> 
    <item name="android:windowLightStatusBar" tools:targetApi="m">true</item> 
    </style> 

    <style name="AppThemeWhite.NoActionBar"> 
    <item name="windowActionBar">false</item> 
    <item name="windowNoTitle">true</item> 
    </style> 

    <style name="AppTheme.AppBarOverlay" parent="ThemeOverlay.AppCompat.Dark.ActionBar"/> 

    <style name="AppTheme.PopupOverlay" parent="ThemeOverlay.AppCompat.Light"/> 

    <style name="AppTheme.PopupOverlay.white" parent="ThemeOverlay.AppCompat.Light"> 
    <item name="android:textColor">@color/black</item> 
    <item name="colorPrimaryDark">@color/black</item> 
    <item name="colorAccent">@color/black</item> 
    </style> 

    <!-- ToolBar --> 
    <style name="ToolBaWhiterStyle" parent="Theme.AppCompat"> 
    <item name="android:textColorPrimary">@android:color/black</item> 
    <item name="android:textColorSecondary">@android:color/black</item> 
    <item name="actionMenuTextColor">@android:color/black</item> 
    </style>

v21/styles.xml

<resources> 

    <style name="AppThemeWhite" parent="Base.Theme.AppCompat.Light.DarkActionBar"> 
    <item name="android:windowDrawsSystemBarBackgrounds">true</item> 
    <item name="android:windowActionBarOverlay">true</item> 
    <item name="android:windowContentOverlay">@null</item> 
    </style> 

    <style name="AppThemeWhite.NoActionBar"> 
    <item name="windowActionBar">false</item> 
    <item name="windowNoTitle">true</item> 
    <item name="android:statusBarColor">@android:color/transparent</item> 
    </style> 

</resources>

錯誤：

The following classes could not be instantiated: - android.support.constraint.ConstraintLayout (Open Class, Show Exception, Clear Cache) Tip: Use View.isInEditMode() in your custom views to skip code or show sample data when shown in the IDE.

Exception Details java.lang.NoSuchFieldError: ConstraintLayout_Layout at android.support.constraint.ConstraintLayout.init(ConstraintLayout.java:440) at android.support.constraint.ConstraintLayout.(ConstraintLayout.java:420) at java.lang.reflect.Constructor.newInstance(Constructor.java:423) at android.view.LayoutInflater.createViewFromTag(LayoutInflater.java:733) at android.view.LayoutInflater.inflate(LayoutInflater.java:495) at android.view.LayoutInflater.inflate(LayoutInflater.java:397) Copy stack to clipboard

來源

2017-06-29 Mohamed ALOUANE