无法使用android.support.v7.widget.AppCompatTextView实例化以下类

最近我在 Android工作室的应用程序中将我的sdk从25改为26,我在我的所有xml中都遇到了这个奇怪的错误.目前错误并没有以我能看到的任何方式影响我的应用程序,但是每次我必须编辑或更改xml中的某些内容时都很烦人.
这里的错误：

无法实例化以下类 – android.support.v7.widget.AppCompatTextView

java.lang.NullPointerException
at android.content.res.Resources_Delegate.getValue(Resources_Delegate.java:788)
at android.content.res.Resources.getValue(Resources.java:1286)
at android.support.v4.content.res.ResourcesCompat.loadFont(ResourcesCompat.java:212)
at android.support.v4.content.res.ResourcesCompat.getFont(ResourcesCompat.java:206)
at android.support.v7.widget.TintTypedArray.getFont(TintTypedArray.java:119)
at android.support.v7.widget.AppCompatTextHelper.updateTypefaceAndStyle(AppCompatTextHelper.java:208)
at android.support.v7.widget.AppCompatTextHelper.loadFromAttributes(AppCompatTextHelper.java:152)
at android.support.v7.widget.AppCompatTextHelperV17.loadFromAttributes(AppCompatTextHelperV17.java:38)
at android.support.v7.widget.AppCompatTextView.<init>(AppCompatTextView.java:81)
at android.support.v7.widget.AppCompatTextView.<init>(AppCompatTextView.java:71)
at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:62)
at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45)
at java.lang.reflect.Constructor.newInstance(Constructor.java:423)
at org.jetbrains.android.uipreview.ViewLoader.createNewInstance(ViewLoader.java:475)
at org.jetbrains.android.uipreview.ViewLoader.loadClass(ViewLoader.java:250)
at org.jetbrains.android.uipreview.ViewLoader.loadClass(ViewLoader.java:213)
at com.android.tools.idea.rendering.LayoutlibCallbackImpl.loadClass(LayoutlibCallbackImpl.java:193)
at android.view.BridgeInflater.loadCustomView(BridgeInflater.java:333)
at android.view.BridgeInflater.onCreateView(BridgeInflater.java:152)
at android.view.LayoutInflater.onCreateView(LayoutInflater.java:717)
at android.view.LayoutInflater.createViewFromTag(LayoutInflater.java:785)
at android.view.BridgeInflater.createViewFromTag(BridgeInflater.java:222)
at android.view.LayoutInflater.createViewFromTag(LayoutInflater.java:727)
at android.view.LayoutInflater.rInflate_Original(LayoutInflater.java:858)
at android.view.LayoutInflater_Delegate.rInflate(LayoutInflater_Delegate.java:70)
at android.view.LayoutInflater.rInflate(LayoutInflater.java:834)
at android.view.LayoutInflater.inflate(LayoutInflater.java:492)
at com.android.layoutlib.bridge.bars.CustomBar.<init>(CustomBar.java:95)
at com.android.layoutlib.bridge.bars.StatusBar.<init>(StatusBar.java:67)
at com.android.layoutlib.bridge.impl.Layout.createStatusBar(Layout.java:224)
at com.android.layoutlib.bridge.impl.Layout.<init>(Layout.java:146)
at com.android.layoutlib.bridge.impl.RenderSessionImpl.inflate(RenderSessionImpl.java:301)
at com.android.layoutlib.bridge.Bridge.createSession(Bridge.java:429)
at com.android.ide.common.rendering.LayoutLibrary.createSession(LayoutLibrary.java:368)
at com.android.tools.idea.rendering.RenderTask$2.compute(RenderTask.java:567)
at com.android.tools.idea.rendering.RenderTask$2.compute(RenderTask.java:549)
at com.intellij.openapi.application.impl.ApplicationImpl.runReadAction(ApplicationImpl.java:863)
at com.android.tools.idea.rendering.RenderTask.createRenderSession(RenderTask.java:549)
at com.android.tools.idea.rendering.RenderTask.lambda$inflate$1(RenderTask.java:680)
at java.util.concurrent.FutureTask.run(FutureTask.java:266)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
at java.lang.Thread.run(Thread.java:745)

我的朋友：

apply plugin: 'com.android.application'

android {
    compileSdkVersion 26
    buildToolsversion "26.0.1"
    defaultConfig {
        applicationId "com.al285790.time2cook"
        minSdkVersion 15
        targetSdkVersion 26
        multiDexEnabled true
        versionCode 1
        versionName "1.0"
        testInstrumentationRunner "android.support.test.runner.AndroidJUnitRunner"
    }

    buildTypes {
        release {
            minifyEnabled false
            proguardFiles getDefaultProguardFile('proguard-android.txt'),'proguard-rules.pro'
        }
    }
}

dependencies {
    compile filetree(dir: 'libs',include: ['*.jar'])
    androidTestCompile('com.android.support.test.espresso:espresso-core:2.2.2',{
        exclude group: 'com.android.support',module: 'support-annotations'
    })


    compile 'com.android.support:appcompat-v7:26.0.1'
    compile 'com.android.support:palette-v7:26.0.1'
    compile 'com.android.support:design:26.0.1'
    compile 'com.google.firebase:firebase-database:11.0.2'
    compile 'com.google.firebase:firebase-core:9.6.1'
    compile 'com.google.firebase:firebase-storage:11.0.2'
    compile 'com.google.firebase:firebase-auth:11.0.2'
    compile 'com.github.bumptech.glide:glide:3.7.0'
    compile 'com.firebaseui:firebase-ui-storage:1.2.0'
    compile 'com.android.support.constraint:constraint-layout:1.0.2'
    compile('com.mikepenz:materialdrawer:5.9.5@aar') {
        transitive = true
    }

    testCompile 'junit:junit:4.12'
}
apply plugin: 'com.google.gms.google-services'

编辑：添加了一些我的xml代码

<?xml version="1.0" encoding="utf-8"?>
<android.support.design.widget.CoordinatorLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    android:layout_width="match_parent"
    android:layout_height="match_parent">

    <android.support.design.widget.AppBarLayout
        android:id="@+id/appbar"
        android:layout_width="match_parent"
        android:layout_height="wrap_content">

        <android.support.v7.widget.Toolbar
            android:id="@+id/toolbar"
            android:layout_width="match_parent"
            android:layout_height="match_parent"
            android:layout_weight="1"></android.support.v7.widget.Toolbar>

    </android.support.design.widget.AppBarLayout>

    <android.support.v4.widget.nestedScrollView
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        app:layout_behavior="android.support.design.widget.AppBarLayout$ScrollingViewBehavior">

        <android.support.v4.widget.nestedScrollView
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            app:layout_behavior="@string/appbar_scrolling_view_behavior"
            tools:context="com.al285790.time2cook.recipeInfo.RecipeInfoActivity">


            <LinearLayout
                android:layout_width="match_parent"
                android:layout_height="wrap_content"
                android:orientation="vertical"
                android:scrollbars="none">

                <TextView
                    android:id="@+id/recipeNameText"
                    android:layout_width="match_parent"
                    android:layout_height="wrap_content"
                    android:textSize="24sp"
                    android:textStyle="bold" />


                <ImageView
                    android:id="@+id/photoRecipe"
                    android:layout_width="match_parent"
                    android:layout_height="wrap_content"
                    android:scaleType="fitCenter"
                    app:srcCompat="@drawable/cho" />

                <TextView
                    android:id="@+id/textView10"
                    android:layout_width="match_parent"
                    android:layout_height="wrap_content"
                    android:text="Dificulty"
                    android:textSize="24sp"
                    android:textStyle="bold" />

                <LinearLayout
                    android:layout_width="match_parent"
                    android:layout_height="match_parent"
                    android:orientation="horizontal">

                    <ratingBar
                        android:id="@+id/ratingBarDificulty"
                        android:layout_width="wrap_content"
                        android:layout_height="wrap_content"
                        android:layout_gravity="center"
                        android:isIndicator="true"
                        android:numStars="5"
                        android:stepSize="1" />

                    <Button
                        android:id="@+id/button8"
                        android:layout_width="match_parent"
                        android:layout_height="wrap_content"
                        android:onClick="giveLike"
                        android:text="LIKE!" />
                </LinearLayout>

                <TextView
                    android:id="@+id/Ingredients"
                    android:layout_width="match_parent"
                    android:layout_height="wrap_content"
                    android:text="Ingredients"
                    android:textSize="24sp"
                    android:textStyle="bold" />

                <android.support.v7.widget.RecyclerView
                    android:id="@+id/superList"
                    android:layout_width="wrap_content"
                    android:layout_height="wrap_content" />

                <TextView
                    android:id="@+id/textView9"
                    android:layout_width="match_parent"
                    android:layout_height="wrap_content"
                    android:text="Steps"
                    android:textSize="24sp"
                    android:textStyle="bold" />

                <android.support.v7.widget.RecyclerView
                    android:id="@+id/stepsList"
                    android:layout_width="match_parent"
                    android:layout_height="match_parent" />

            </LinearLayout>
        </android.support.v4.widget.nestedScrollView>
    </android.support.v4.widget.nestedScrollView>
</android.support.design.widget.CoordinatorLayout>