Error: NameNotFoundException: com.google.android.webview

android.util.AndroidRuntimeException: android.content.pm.PackageManager$NameNotFoundException: com.google.android.webview at android.webkit.WebViewFactory.getFactoryClass(WebViewFactory.java:161) at android.webkit.WebViewFactory.getProvider(WebViewFactory.java:101) at android.webkit.WebView.getFactory(WebView.java:2193) at android.webkit.WebView.ensureProviderCreated(WebView.java:2188) at android.webkit.WebView.setOverScrollMode(WebView.java:2247) at android.view.View.(View.java:3785) at android.view.View.(View.java:3899) at android.view.ViewGroup.(ViewGroup.java:507) at android.widget.AbsoluteLayout.(AbsoluteLayout.java:55) at android.webkit.WebView.(WebView.java:547) at android.webkit.WebView.(WebView.java:492) at android.webkit.WebView.(WebView.java:475) at android.webkit.WebView.(WebView.java:462) at android.webkit.WebView.(WebView.java:452) at com.facebook.ads.internal.n.d.b(Unknown Source) at com.facebook.ads.internal.n.d.a(Unknown Source) at com.facebook.ads.internal.n.d.a(Unknown Source) at com.facebook.ads.BidderTokenProvider.getBidderToken(Unknown Source) at com.mopub.mobileads.FacebookAdvancedBidder.getToken(Unknown Source) at com.mopub.common.AdvancedBiddingTokens.getTokensAsJsonObject(Unknown Source) at com.mopub.common.AdvancedBiddingTokens.getTokensAsJsonString(Unknown Source) at com.mopub.common.MoPub.getAdvancedBiddingTokensJson(Unknown Source) at com.mopub.common.AdUrlGenerator.setAdvancedBiddingTokens(Unknown Source) at com.mopub.common.AdUrlGenerator.addBaseParams(Unknown Source) at com.mopub.nativeads.NativeUrlGenerator.generateUrlString(Unknown Source) at com.mopub.nativeads.MoPubNative.loadNativeAd(Unknown Source) at com.mopub.nativeads.MoPubNative.access$200(Unknown Source) at com.mopub.nativeads.MoPubNative$3.onInitializationFinished(Unknown Source) at com.mopub.common.MoPub$1.onInitializationFinished(Unknown Source) at com.mopub.common.CompositeSdkInitializationListener$1.run(Unknown Source) at android.os.Handler.handleCallback(Handler.java:739)

Root cause：

https://stackoverflow.com/questions/29575313/namenotfoundexception-webview/29809338#29809338

https://groups.google.com/forum/#!topic/google-admob-ads-sdk/k94v72E-7is

https://developers.facebook.com/support/bugs/480871688779121/?disable_redirect=0:

更好的解决方案是提示用户升级googleplay的webview版本。