無法實例化以下類：-android.support.design.widget.FloatingActionButton Android Studio 1.4.1 BuildToolsVersion“ 23.0.2”

Question

渲染問題

followingring類無法實例化：

-android.support.design.widget.FloatingActionButton
(Open Class, Show Exception, Clear Cache)

提示：在自定義視圖中使用View.isInEditMode（）可以跳過代碼或在IDE中顯示示例數據時顯示示例數據

例外詳情

android.content.res.Resources$NotFoundException: Unable to find resource ID #0x1080029
    at android.content.res.Resources.getResourceName(Resources.java:2235)
    at android.content.res.Resources.loadDrawableForCookie(Resources.java:2602)
    at android.content.res.Resources.loadDrawable(Resources.java:2540)
    at android.content.res.Resources.getDrawable(Resources.java:806)
    at android.content.Context.getDrawable(Context.java:458)
    at android.support.v4.content.ContextCompatApi21.getDrawable(ContextCompatApi21.java:26)
    at android.support.v4.content.ContextCompat.getDrawable(ContextCompat.java:321)
    at android.support.v7.widget.AppCompatDrawableManager.getDrawable(AppCompatDrawableManager.java:180)
    at android.support.v7.widget.TintTypedArray.getDrawableIfKnown(TintTypedArray.java:70)
    at android.support.v7.widget.AppCompatImageHelper.loadFromAttributes(AppCompatImageHelper.java:39)
    at android.support.v7.widget.AppCompatImageButton.<init>(AppCompatImageButton.java:65)
    at android.support.design.widget.VisibilityAwareImageButton.<init>(VisibilityAwareImageButton.java:37)
    at android.support.design.widget.FloatingActionButton.<init>(FloatingActionButton.java:109)
    at android.support.design.widget.FloatingActionButton.<init>(FloatingActionButton.java:105)
    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:422)
    at org.jetbrains.android.uipreview.ViewLoader.createNewInstance(ViewLoader.java:458)
    at org.jetbrains.android.uipreview.ViewLoader.loadClass(ViewLoader.java:170)
    at org.jetbrains.android.uipreview.ViewLoader.loadView(ViewLoader.java:103)
    at com.android.tools.idea.rendering.LayoutlibCallbackImpl.loadView(LayoutlibCallbackImpl.java:190)
    at android.view.BridgeInflater.loadCustomView(BridgeInflater.java:247)
    at android.view.BridgeInflater.createViewFromTag(BridgeInflater.java:171)
    at android.view.LayoutInflater.createViewFromTag(LayoutInflater.java:704)
    at android.view.LayoutInflater.rInflate_Original(LayoutInflater.java:835)
    at android.view.LayoutInflater_Delegate.rInflate(LayoutInflater_Delegate.java:70)
    at android.view.LayoutInflater.rInflate(LayoutInflater.java:811)
    at android.view.LayoutInflater.rInflateChildren(LayoutInflater.java:798)
    at android.view.LayoutInflater.inflate(LayoutInflater.java:515)
    at android.view.LayoutInflater.inflate(LayoutInflater.java:394)
    at com.android.layoutlib.bridge.impl.RenderSessionImpl.inflate(RenderSessionImpl.java:223)
    at com.android.layoutlib.bridge.Bridge.createSession(Bridge.java:426)
    at com.android.ide.common.rendering.LayoutLibrary.createSession(LayoutLibrary.java:350)
    at com.android.tools.idea.rendering.RenderTask$2.compute(RenderTask.java:510)
    at com.android.tools.idea.rendering.RenderTask$2.compute(RenderTask.java:498)
    at com.intellij.openapi.application.impl.ApplicationImpl.runReadAction(ApplicationImpl.java:888)
    at com.android.tools.idea.rendering.RenderTask.createRenderSession(RenderTask.java:498)
    at com.android.tools.idea.rendering.RenderTask.access$600(RenderTask.java:72)
    at com.android.tools.idea.rendering.RenderTask$3.call(RenderTask.java:610)
    at com.android.tools.idea.rendering.RenderTask$3.call(RenderTask.java:607)
    at com.android.tools.idea.rendering.RenderService.runRenderAction(RenderService.java:366)
    at com.android.tools.idea.rendering.RenderTask.render(RenderTask.java:607)
    at com.android.tools.idea.rendering.RenderTask.render(RenderTask.java:629)
    at com.intellij.android.designer.designSurface.AndroidDesignerEditorPanel$6.run(AndroidDesignerEditorPanel.java:480)
    at com.intellij.util.ui.update.MergingUpdateQueue.execute(MergingUpdateQueue.java:320)
    at com.intellij.util.ui.update.MergingUpdateQueue.execute(MergingUpdateQueue.java:310)
    at com.intellij.util.ui.update.MergingUpdateQueue$2.run(MergingUpdateQueue.java:254)
    at com.intellij.util.ui.update.MergingUpdateQueue.flush(MergingUpdateQueue.java:269)
    at com.intellij.util.ui.update.MergingUpdateQueue.flush(MergingUpdateQueue.java:227)
    at com.intellij.util.ui.update.MergingUpdateQueue.run(MergingUpdateQueue.java:217)
    at com.intellij.util.concurrency.QueueProcessor.runSafely(QueueProcessor.java:238)
    at com.intellij.util.Alarm$Request$1.run(Alarm.java:351)
    at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
    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)

我不確定這個問題。 我在使用sdk級別23（android 6.0）后遇到了這個問題，它會自動生成以在android studio的布局中顯示電子郵件按鈕。 請確認我是否有一些缺少的組件要下載，並且對於要顯示的FloatingActionBar至關重要。

我是Android開發領域的新手，現在仍在學習。 感謝您的建議和幫助。

Answer 1

更新android studio即可解決此問題。 使用android studio和為android平台開發的經驗法則是使用它是最新的，並在首次構建項目時保持與Internet的連接。 解決了大多數依賴相關的問題。