The following classes could not be instantiated

[scariest]

Hi, I am facing class could not be instantiated:

java.lang.NoClassDefFoundError: com/liangfeizc/avatarview/R$styleable at com.liangfeizc.avatarview.AvatarView.(AvatarView.java:57) at com.liangfeizc.avatarview.AvatarView.(AvatarView.java:51) 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:176) at android.view.BridgeInflater.loadCustomView(BridgeInflater.java:247) at android.view.BridgeInflater.createViewFromTag(BridgeInflater.java:171) 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.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:317) at com.android.layoutlib.bridge.Bridge.createSession(Bridge.java:429) at com.android.ide.common.rendering.LayoutLibrary.createSession(LayoutLibrary.java:350) at com.android.tools.idea.rendering.RenderTask$2.compute(RenderTask.java:520) at com.android.tools.idea.rendering.RenderTask$2.compute(RenderTask.java:508) at com.intellij.openapi.application.impl.ApplicationImpl.runReadAction(ApplicationImpl.java:967) at com.android.tools.idea.rendering.RenderTask.createRenderSession(RenderTask.java:508) at com.android.tools.idea.rendering.RenderTask.access$600(RenderTask.java:75) at com.android.tools.idea.rendering.RenderTask$3.call(RenderTask.java:620) at com.android.tools.idea.rendering.RenderTask$3.call(RenderTask.java:617) at com.android.tools.idea.rendering.RenderService.runRenderAction(RenderService.java:371) at com.android.tools.idea.rendering.RenderTask.render(RenderTask.java:617) at com.android.tools.idea.rendering.RenderTask.render(RenderTask.java:639) at org.jetbrains.android.uipreview.AndroidLayoutPreviewToolWindowManager.doRender(AndroidLayoutPreviewToolWindowManager.java:654) at org.jetbrains.android.uipreview.AndroidLayoutPreviewToolWindowManager.access$1700(AndroidLayoutPreviewToolWindowManager.java:82) at org.jetbrains.android.uipreview.AndroidLayoutPreviewToolWindowManager$7$1.run(AndroidLayoutPreviewToolWindowManager.java:596) at com.intellij.openapi.progress.impl.CoreProgressManager$2.run(CoreProgressManager.java:142) at com.intellij.openapi.progress.impl.CoreProgressManager.registerIndicatorAndRun(CoreProgressManager.java:446) at com.intellij.openapi.progress.impl.CoreProgressManager.executeProcessUnderProgress(CoreProgressManager.java:392) at com.intellij.openapi.progress.impl.ProgressManagerImpl.executeProcessUnderProgress(ProgressManagerImpl.java:54) at com.intellij.openapi.progress.impl.CoreProgressManager.runProcess(CoreProgressManager.java:127) at org.jetbrains.android.uipreview.AndroidLayoutPreviewToolWindowManager$7.run(AndroidLayoutPreviewToolWindowManager.java:591) at com.intellij.util.ui.update.MergingUpdateQueue.execute(MergingUpdateQueue.java:337) at com.intellij.util.ui.update.MergingUpdateQueue.execute(MergingUpdateQueue.java:327) at com.intellij.util.ui.update.MergingUpdateQueue$3.run(MergingUpdateQueue.java:271) at com.intellij.util.ui.update.MergingUpdateQueue.flush(MergingUpdateQueue.java:286) at com.intellij.util.ui.update.MergingUpdateQueue.flush(MergingUpdateQueue.java:244) at com.intellij.util.ui.update.MergingUpdateQueue.run(MergingUpdateQueue.java:234) at com.intellij.util.concurrency.QueueProcessor.runSafely(QueueProcessor.java:238) at com.intellij.util.Alarm$Request$1.run(Alarm.java:352) at java.util.concurrent.Executors$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)