title: Android Failed to instantiate one or more classes
body: <p>I have a running project and all the xml files are showing me the error message <code>Android Failed to instantiate one or more classes</code>. The program still works.</p>
  
  <p>I cleaned the cache and used invalidate Caches and Restart.</p>
  
  <p>Here the Full message:</p>
  
  <blockquote>
    <p>The following classes could not be instantiated android.support.v7.widget.AppCompatTextView</p>
  </blockquote>
  
  <p>Tip: Use View.isInEditMode() in your custom view to skip code or show sample data when shown in the IDE.</p>
  
  <pre><code>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.&lt;init&gt;(AppCompatTextView.java:81)
      at android.support.v7.widget.AppCompatTextView.&lt;init&gt;(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.&lt;init&gt;(CustomBar.java:95)
      at com.android.layoutlib.bridge.bars.StatusBar.&lt;init&gt;(StatusBar.java:67)
      at com.android.layoutlib.bridge.impl.Layout.createStatusBar(Layout.java:224)
      at com.android.layoutlib.bridge.impl.Layout.&lt;init&gt;(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)
  </code></pre>