android.webkit.WebViewFactory $ MissingWebViewPackageException于Android 7.0

下崩溃是偶尔（很少）报告，只有从的Android 7.0设备：

android.util.AndroidRuntimeException: 
    at android.webkit.WebViewFactory.getProviderClass (WebViewFactory.java:371) 
    at android.webkit.WebViewFactory.getProvider (WebViewFactory.java:194) 
    at android.webkit.WebViewDatabase.getInstance (WebViewDatabase.java:38) 
    at com.amazon.device.ads.AdLayout.isWebViewDatabaseNull (SourceFile:352) 
    at com.amazon.device.ads.AdLayout.initializeIfNecessary (SourceFile:260) 
    at com.amazon.device.ads.AdLayout.getAdController (SourceFile:303) 
    at com.amazon.device.ads.AdLayout.onLayout (SourceFile:478) 
    at android.view.View.layout (View.java:17838) 
    at android.view.ViewGroup.layout (ViewGroup.java:5754) 
    at android.widget.RelativeLayout.onLayout (RelativeLayout.java:1189) 
    at android.view.View.layout (View.java:17838) 
    at android.view.ViewGroup.layout (ViewGroup.java:5754) 
    at android.widget.RelativeLayout.onLayout (RelativeLayout.java:1189) 
    at android.view.View.layout (View.java:17838) 
    at android.view.ViewGroup.layout (ViewGroup.java:5754) 
    at android.widget.LinearLayout.setChildFrame (LinearLayout.java:1982) 
    at android.widget.LinearLayout.layoutVertical (LinearLayout.java:1826) 
    at android.widget.LinearLayout.onLayout (LinearLayout.java:1735) 
    at android.view.View.layout (View.java:17838) 
    at android.view.ViewGroup.layout (ViewGroup.java:5754) 
    at android.widget.FrameLayout.layoutChildren (FrameLayout.java:383) 
    at android.widget.FrameLayout.onLayout (FrameLayout.java:321) 
    at android.view.View.layout (View.java:17838) 
    at android.view.ViewGroup.layout (ViewGroup.java:5754) 
    at android.widget.FrameLayout.layoutChildren (FrameLayout.java:383) 
    at android.widget.FrameLayout.onLayout (FrameLayout.java:321) 
    at android.view.View.layout (View.java:17838) 
    at android.view.ViewGroup.layout (ViewGroup.java:5754) 
    at android.widget.LinearLayout.setChildFrame (LinearLayout.java:1982) 
    at android.widget.LinearLayout.layoutVertical (LinearLayout.java:1826) 
    at android.widget.LinearLayout.onLayout (LinearLayout.java:1735) 
    at android.view.View.layout (View.java:17838) 
    at android.view.ViewGroup.layout (ViewGroup.java:5754) 
    at android.widget.FrameLayout.layoutChildren (FrameLayout.java:383) 
    at android.widget.FrameLayout.onLayout (FrameLayout.java:321) 
    at android.view.View.layout (View.java:17838) 
    at android.view.ViewGroup.layout (ViewGroup.java:5754) 
    at android.widget.LinearLayout.setChildFrame (LinearLayout.java:1982) 
    at android.widget.LinearLayout.layoutVertical (LinearLayout.java:1826) 
    at android.widget.LinearLayout.onLayout (LinearLayout.java:1735) 
    at android.view.View.layout (View.java:17838) 
    at android.view.ViewGroup.layout (ViewGroup.java:5754) 
    at android.widget.FrameLayout.layoutChildren (FrameLayout.java:383) 
    at android.widget.FrameLayout.onLayout (FrameLayout.java:321) 
    at com.android.internal.policy.DecorView.onLayout (DecorView.java:751) 
    at android.view.View.layout (View.java:17838) 
    at android.view.ViewGroup.layout (ViewGroup.java:5754) 
    at android.view.ViewRootImpl.performLayout (ViewRootImpl.java:2698) 
    at android.view.ViewRootImpl.performTraversals (ViewRootImpl.java:2371) 
    at android.view.ViewRootImpl.doTraversal (ViewRootImpl.java:1462) 
    at android.view.ViewRootImpl$TraversalRunnable.run (ViewRootImpl.java:6960) 
    at android.view.Choreographer$CallbackRecord.run (Choreographer.java:907) 
    at android.view.Choreographer.doCallbacks (Choreographer.java:709) 
    at android.view.Choreographer.doFrame (Choreographer.java:644) 
    at android.view.Choreographer$FrameDisplayEventReceiver.run (Choreographer.java:893) 
    at android.os.Handler.handleCallback (Handler.java:836) 
    at android.os.Handler.dispatchMessage (Handler.java:103) 
    at android.os.Looper.loop (Looper.java:208) 
    at android.app.ActivityThread.main (ActivityThread.java:6267) 
    at java.lang.reflect.Method.invoke (Native Method) 
    at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run (ZygoteInit.java:1063) 
    at com.android.internal.os.ZygoteInit.main (ZygoteInit.java:924) 
Caused by: android.webkit.WebViewFactory$MissingWebViewPackageException: 
    at android.webkit.WebViewFactory.getWebViewContextAndSetProvider (WebViewFactory.java:270) 
    at android.webkit.WebViewFactory.getProviderClass (WebViewFactory.java:330)

堆栈跟踪不包含任何有关应用程序，所以我不知道在哪里看这个。任何人都可以对此有所了解吗？如何防止这一点？

来源

2017-09-18 Hong