Question

在过去的几个月里，我一直在使用折叠工具栏布局没有问题。但是今天，每当我打开xml文件时都会弹出此错误。确切的错误如下：

无法实例化以下类： - android.support.design.widget.CollapsingToolbarLayout

这是堆栈跟踪：

  android.content.res.Resources$NotFoundException
    at com.android.layoutlib.bridge.android.BridgeContext.obtainStyledAttributes(BridgeContext.java:656)
    at com.android.layoutlib.bridge.android.BridgeContext.obtainStyledAttributes(BridgeContext.java:111)
    at android.support.v7.widget.TintTypedArray.obtainStyledAttributes(TintTypedArray.java:55)
    at android.support.design.widget.CollapsingTextHelper.setCollapsedTextAppearance(CollapsingTextHelper.java:202)
    at android.support.design.widget.CollapsingToolbarLayout.<init>(CollapsingToolbarLayout.java:199)
    at android.support.design.widget.CollapsingToolbarLayout.<init>(CollapsingToolbarLayout.java:140)
    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:465)
    at org.jetbrains.android.uipreview.ViewLoader.loadClass(ViewLoader.java:172)
    at org.jetbrains.android.uipreview.ViewLoader.loadView(ViewLoader.java:105)
    at com.android.tools.idea.rendering.LayoutlibCallbackImpl.loadView(LayoutlibCallbackImpl.java:186)
    at android.view.BridgeInflater.loadCustomView(BridgeInflater.java:334)
    at android.view.BridgeInflater.loadCustomView(BridgeInflater.java:345)
    at android.view.BridgeInflater.createViewFromTag(BridgeInflater.java:245)
    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.rInflateChildren(LayoutInflater.java:821)
    at android.view.LayoutInflater.rInflate_Original(LayoutInflater.java:861)
    at android.view.LayoutInflater_Delegate.rInflate(LayoutInflater_Delegate.java:70)
    at android.view.LayoutInflater.rInflate(LayoutInflater.java:834)
    at android.view.LayoutInflater.rInflateChildren(LayoutInflater.java:821)
    at android.view.LayoutInflater.inflate(LayoutInflater.java:518)
    at android.view.LayoutInflater.inflate(LayoutInflater.java:397)
    at com.android.layoutlib.bridge.impl.RenderSessionImpl.inflate(RenderSessionImpl.java:324)
    at com.android.layoutlib.bridge.Bridge.createSession(Bridge.java:429)
    at com.android.ide.common.rendering.LayoutLibrary.createSession(LayoutLibrary.java:389)
    at com.android.tools.idea.rendering.RenderTask$2.compute(RenderTask.java:548)
    at com.android.tools.idea.rendering.RenderTask$2.compute(RenderTask.java:533)
    at com.intellij.openapi.application.impl.ApplicationImpl.runReadAction(ApplicationImpl.java:966)
    at com.android.tools.idea.rendering.RenderTask.createRenderSession(RenderTask.java:533)
    at com.android.tools.idea.rendering.RenderTask.lambda$inflate$72(RenderTask.java:659)
    at java.util.concurrent.FutureTask.run(FutureTask.java:266)
    at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)
    at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
    at java.lang.Thread.run(Thread.java:745)

CollapsingToolBarLayout.xml

 <android.support.design.widget.CoordinatorLayout
    xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:background="@color/colorPrimary">
   <android.support.design.widget.AppBarLayout
      android:id="@+id/custom_view1"
      android:layout_width="match_parent"
      android:layout_height="250dp"
      android:background="#FFFFFF"
      >

    <android.support.design.widget.CollapsingToolbarLayout
        android:id="@+id/collapsing_toolbar"
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        app:collapsedTitleTextAppearance="@color/black"
        app:contentScrim="@color/colorPrimary"
        app:layout_scrollFlags="scroll|exitUntilCollapsed"
        >
      <RelativeLayout
          android:layout_width="match_parent"
          android:layout_height="match_parent"
          android:clickable="true"
          >
        <ImageView
            android:id="@+id/backdrop"
            android:layout_width="match_parent"
            android:layout_height="match_parent"
            android:baselineAlignBottom="false"
            android:fitsSystemWindows="true"
            android:scaleType="centerCrop"
            app:layout_collapseMode="parallax"
            />
        <ImageView
            android:id="@+id/play_btn"
            android:layout_width="match_parent"
            android:layout_height="match_parent"
            android:adjustViewBounds="true"
            android:baselineAlignBottom="false"
            android:clickable="true"
            android:scaleType="center"
            app:srcCompat="@drawable/play_button"
            />
      </RelativeLayout>
      <android.support.v7.widget.Toolbar
          android:id="@+id/my_toolbar"
          android:layout_width="match_parent"
          android:layout_height="?attr/actionBarSize"
          app:layout_collapseMode="pin"


          />

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

在模拟器中运行应用程序时，工具栏工作正常，但我仍然感到困惑，为什么在android studio中发生这种情况。我已经清除了缓存，重建，重新检查支持库版本，以及我能想到的其他一切。我错过了什么？

Answer 1

删除

app:collapsedTitleTextAppearance="@color/black

取而代之的是，要更改标题颜色，请使用此处描述的方法之一：

Correct way to change Collapseble Toolbar title

同时将您的Android支持库更新为24.2.1版本。

无法实例化CollapsingToolBarLayout

1 个答案: