Java.Lang.ClassNotFoundException：沒有找到類「android.view.CoordinatorLayout」

Question

我試圖在片段XML文件中使用coordinatorlayout，但我收到此錯誤。我已經打了一段時間了，現在開始讓我發瘋。

我已經嘗試了許多不同的事情，但沒有任何工作。有沒有人有任何想法？

Android.Views.InflateException: Binary XML file line #1: Error inflating class CoordinatorLayout ---> Java.Lang.ClassNotFoundException: Didn't find class "android.view.CoordinatorLayout" on path: DexPathList[[zip file "/data/app/TnpApp.TnpApp-1/base.apk"],nativeLibraryDirectories=[/data/app/TnpApp.TnpApp-1/lib/arm, /vendor/lib, /system/lib]] 
    at java.lang.ClassNotFoundException: Didn't find class "android.view.CoordinatorLayout" on path: DexPathList[[zip file "/data/app/TnpApp.TnpApp-1/base.apk"],nativeLibraryDirectories=[/data/app/TnpApp.TnpApp-1/lib/arm, /vendor/lib, /system/lib]] 
    at at dalvik.system.BaseDexClassLoader.findClass(BaseDexClassLoader.java:56) 
    at at java.lang.ClassLoader.loadClass(ClassLoader.java:511) 
    at at java.lang.ClassLoader.loadClass(ClassLoader.java:469) 
    at at android.view.LayoutInflater.createView(LayoutInflater.java:571) 
    at at android.view.LayoutInflater.onCreateView(LayoutInflater.java:665) 
    at at com.android.internal.policy.impl.PhoneLayoutInflater.onCreateView(PhoneLayoutInflater.java:65) 
    at at android.view.LayoutInflater.onCreateView(LayoutInflater.java:682) 
    at at android.view.LayoutInflater.createViewFromTag(LayoutInflater.java:741) 
    at at android.view.LayoutInflater.inflate(LayoutInflater.java:482) 
    at at android.view.LayoutInflater.inflate(LayoutInflater.java:414) 
    at at md5be8727c6e6990bc4e9301ed0ea72b54c.TopicalFragment.n_onCreateView(Native Method) 
    at at md5be8727c6e6990bc4e9301ed0ea72b54c.TopicalFragment.onCreateView(TopicalFragment.java:29) 
    at at android.app.Fragment.performCreateView(Fragment.java:2069) 
    at at android.app.FragmentManagerImpl.moveToState(FragmentManager.java:899) 
    at at android.app.FragmentManagerImpl.moveToState(FragmentManager.java:1072) 
    at at android.app.BackStackRecord.run(BackStackRecord.java:852) 
    at at android.app.FragmentManagerImpl.execPendingActions(FragmentManager.java:1478) 
    at at android.app.FragmentManagerImpl$1.run(FragmentManager.java:452) 
    at at android.os.Handler.handleCallback(Handler.java:815) 
    at at android.os.Handler.dispatchMessage(Handler.java:104) 
    at at android.os.Looper.loop(Looper.java:194) 
    at at android.app.ActivityThread.main(ActivityThread.java:5631) 
    at at java.lang.reflect.Method.invoke(Native Method) 
    at at java.lang.reflect.Method.invoke(Method.java:372) 
    at at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:959) 
    at at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:754) 
    at Suppressed: java.lang.ClassNotFoundException: android.view.CoordinatorLayout 
    at at java.lang.Class.classForName(Native Method) 
    at at java.lang.BootClassLoader.findClass(ClassLoader.java:781) 
    at at java.lang.BootClassLoader.loadClass(ClassLoader.java:841) 
    at at java.lang.ClassLoader.loadClass(ClassLoader.java:504) 
    at ... 24 more 
    at Caused by: java.lang.NoClassDefFoundError: Class not found using the boot class loader; no stack available 
    --- End of inner exception stack trace --- 

這裏是我的片段XML：

<?xml version="1.0" encoding="utf-8"?> 
<CoordinatorLayout xmlns:android="http://schemas.android.com/apk/res/android" 
    android:layout_width="fill_parent" 
    android:layout_height="fill_parent" 
    android:orientation="vertical" 
    android:adjustViewBounds="true" 
    android:fitsSystemWindows="true"> 
    <LinearLayout 
     android:layout_width="match_parent" 
     android:layout_height="match_parent" 
     android:orientation="vertical" 
     android:background="#aa000000" 
     android:fitsSystemWindows="true"> 
     <FrameLayout 
      android:layout_width="match_parent" 
      android:layout_height="wrap_content" 
      android:orientation="vertical" 
      android:fitsSystemWindows="true"> 
      <ImageView 
       android:layout_width="match_parent" 
       android:layout_height="150dp" 
       android:scaleType="centerCrop" 
       android:adjustViewBounds="true" 
       android:src="@drawable/commentaryimage" 
       android:fitsSystemWindows="true" /> 
      <View 
       android:layout_width="match_parent" 
       android:layout_height="150dp" 
       android:background="#703c6a87" /> 
      <RelativeLayout 
       android:layout_width="match_parent" 
       android:layout_height="wrap_content" 
       android:orientation="horizontal"> 
       <ImageView 
        android:layout_width="36dp" 
        android:layout_height="36dp" 
        android:src="@drawable/chevron_left" 
        android:layout_alignParentLeft="true" 
        android:id="@+id/up_button" /> 
       <TextView 
        android:text="Topical" 
        android:textAppearance="?android:attr/textAppearanceLarge" 
        android:layout_width="wrap_content" 
        android:layout_height="wrap_content" 
        android:layout_centerInParent="true" 
        android:textColor="@android:color/white" /> 
      </RelativeLayout> 
     </FrameLayout> 
     <RelativeLayout 
      android:id="@+id/today" 
      android:layout_width="match_parent" 
      android:layout_height="wrap_content"> 
      <ListView 
       android:minWidth="25px" 
       android:minHeight="25px" 
       android:layout_width="match_parent" 
       android:layout_height="wrap_content" 
       android:id="@+id/topicalList" 
       android:divider="#309A9A9A" 
       android:dividerHeight="1px" /> 
     </RelativeLayout> 
    </LinearLayout> 
</CoordinatorLayout> 

Answer 1

從錯誤信息，Xamarin.Android.Support.Design庫可能不是在你的項目中引用。

請參考它通過的NuGet，錯誤應該消失：