NameNotFoundException webview

我从Crashlytics收到错误，指出某些设备缺lesscom.google.android.webview。 这怎么可能呢？

java.lang.RuntimeException: Unable to start activity ComponentInfo{com.myapp.app/com.myapp.ReaderActivity}: android.view.InflateException: Binary XML file line #29: Error inflating class com.myapp.MyWebView at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2298) at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2360) at android.app.ActivityThread.access$800(ActivityThread.java:144) at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1278) at android.os.Handler.dispatchMessage(Handler.java:102) at android.os.Looper.loop(Looper.java:135) at android.app.ActivityThread.main(ActivityThread.java:5221) at java.lang.reflect.Method.invoke(Method.java) at java.lang.reflect.Method.invoke(Method.java:372) at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:899) at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:694) Caused by: android.view.InflateException: Binary XML file line #29: Error inflating class com.myapp.MyWebView at android.view.LayoutInflater.createView(LayoutInflater.java:633) at uk.co.chrisjenx.calligraphy.CalligraphyLayoutInflater.createCustomViewInternal(SourceFile:206) at uk.co.chrisjenx.calligraphy.CalligraphyLayoutInflater.access$000(SourceFile:20) at uk.co.chrisjenx.calligraphy.CalligraphyLayoutInflater$PrivateWrapperFactory2.onCreateView(SourceFile:297) at android.view.LayoutInflater$FactoryMerger.onCreateView(LayoutInflater.java:177) at android.view.LayoutInflater.createViewFromTag(LayoutInflater.java:733) at android.view.LayoutInflater.rInflate(LayoutInflater.java:806) at android.view.LayoutInflater.rInflate(LayoutInflater.java:809) at android.view.LayoutInflater.rInflate(LayoutInflater.java:809) at android.view.LayoutInflater.inflate(LayoutInflater.java:504) at uk.co.chrisjenx.calligraphy.CalligraphyLayoutInflater.inflate(SourceFile:60) at android.view.LayoutInflater.inflate(LayoutInflater.java:414) at android.view.LayoutInflater.inflate(LayoutInflater.java:365) at android.support.v7.app.ActionBarActivityDelegateBase.setContentView(SourceFile:228) at android.support.v7.app.ActionBarActivity.setContentView(SourceFile:102) at com.myapp.ReaderActivity.onCreate(SourceFile:120) at android.app.Activity.performCreate(Activity.java:5933) at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1105) at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2251) at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2360) at android.app.ActivityThread.access$800(ActivityThread.java:144) at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1278) at android.os.Handler.dispatchMessage(Handler.java:102) at android.os.Looper.loop(Looper.java:135) at android.app.ActivityThread.main(ActivityThread.java:5221) at java.lang.reflect.Method.invoke(Method.java) at java.lang.reflect.Method.invoke(Method.java:372) at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:899) at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:694) Caused by: java.lang.reflect.InvocationTargetException at java.lang.reflect.Constructor.newInstance(Constructor.java) at java.lang.reflect.Constructor.newInstance(Constructor.java:288) at android.view.LayoutInflater.createView(LayoutInflater.java:607) at uk.co.chrisjenx.calligraphy.CalligraphyLayoutInflater.createCustomViewInternal(SourceFile:206) at uk.co.chrisjenx.calligraphy.CalligraphyLayoutInflater.access$000(SourceFile:20) at uk.co.chrisjenx.calligraphy.CalligraphyLayoutInflater$PrivateWrapperFactory2.onCreateView(SourceFile:297) at android.view.LayoutInflater$FactoryMerger.onCreateView(LayoutInflater.java:177) at android.view.LayoutInflater.createViewFromTag(LayoutInflater.java:733) at android.view.LayoutInflater.rInflate(LayoutInflater.java:806) at android.view.LayoutInflater.rInflate(LayoutInflater.java:809) at android.view.LayoutInflater.rInflate(LayoutInflater.java:809) at android.view.LayoutInflater.inflate(LayoutInflater.java:504) at uk.co.chrisjenx.calligraphy.CalligraphyLayoutInflater.inflate(SourceFile:60) at android.view.LayoutInflater.inflate(LayoutInflater.java:414) at android.view.LayoutInflater.inflate(LayoutInflater.java:365) at android.support.v7.app.ActionBarActivityDelegateBase.setContentView(SourceFile:228) at android.support.v7.app.ActionBarActivity.setContentView(SourceFile:102) at com.myapp.ReaderActivity.onCreate(SourceFile:120) at android.app.Activity.performCreate(Activity.java:5933) at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1105) at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2251) at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2360) at android.app.ActivityThread.access$800(ActivityThread.java:144) at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1278) at android.os.Handler.dispatchMessage(Handler.java:102) at android.os.Looper.loop(Looper.java:135) at android.app.ActivityThread.main(ActivityThread.java:5221) at java.lang.reflect.Method.invoke(Method.java) at java.lang.reflect.Method.invoke(Method.java:372) at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:899) at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:694) Caused by: android.util.AndroidRuntimeException: android.content.pm.PackageManager$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:2185) at android.webkit.WebView.ensureProviderCreated(WebView.java:2180) at android.webkit.WebView.setOverScrollMode(WebView.java:2239) at android.view.View.(View.java:3581) at android.view.View.(View.java:3675) at android.view.ViewGroup.(ViewGroup.java:491) at android.widget.AbsoluteLayout.(AbsoluteLayout.java:55) at android.webkit.WebView.(WebView.java:538) at android.webkit.WebView.(WebView.java:483) at android.webkit.WebView.(WebView.java:466) at android.webkit.WebView.(WebView.java:453) at com.myapp.MyWebView.(SourceFile:31) at java.lang.reflect.Constructor.newInstance(Constructor.java) at java.lang.reflect.Constructor.newInstance(Constructor.java:288) at android.view.LayoutInflater.createView(LayoutInflater.java:607) at uk.co.chrisjenx.calligraphy.CalligraphyLayoutInflater.createCustomViewInternal(SourceFile:206) at uk.co.chrisjenx.calligraphy.CalligraphyLayoutInflater.access$000(SourceFile:20) at uk.co.chrisjenx.calligraphy.CalligraphyLayoutInflater$PrivateWrapperFactory2.onCreateView(SourceFile:297) at android.view.LayoutInflater$FactoryMerger.onCreateView(LayoutInflater.java:177) at android.view.LayoutInflater.createViewFromTag(LayoutInflater.java:733) at android.view.LayoutInflater.rInflate(LayoutInflater.java:806) at android.view.LayoutInflater.rInflate(LayoutInflater.java:809) at android.view.LayoutInflater.rInflate(LayoutInflater.java:809) at android.view.LayoutInflater.inflate(LayoutInflater.java:504) at uk.co.chrisjenx.calligraphy.CalligraphyLayoutInflater.inflate(SourceFile:60) at android.view.LayoutInflater.inflate(LayoutInflater.java:414) at android.view.LayoutInflater.inflate(LayoutInflater.java:365) at android.support.v7.app.ActionBarActivityDelegateBase.setContentView(SourceFile:228) at android.support.v7.app.ActionBarActivity.setContentView(SourceFile:102) at com.myapp.ReaderActivity.onCreate(SourceFile:120) at android.app.Activity.performCreate(Activity.java:5933) at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1105) at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2251) at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2360) at android.app.ActivityThread.access$800(ActivityThread.java:144) at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1278) at android.os.Handler.dispatchMessage(Handler.java:102) at android.os.Looper.loop(Looper.java:135) at android.app.ActivityThread.main(ActivityThread.java:5221) at java.lang.reflect.Method.invoke(Method.java) at java.lang.reflect.Method.invoke(Method.java:372) at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:899) at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:694) Caused by: android.content.pm.PackageManager$NameNotFoundException: com.google.android.webview at android.app.ApplicationPackageManager.getPackageInfo(ApplicationPackageManager.java:114) at android.webkit.WebViewFactory.getFactoryClass(WebViewFactory.java:133) at android.webkit.WebViewFactory.getProvider(WebViewFactory.java:101) at android.webkit.WebView.getFactory(WebView.java:2185) at android.webkit.WebView.ensureProviderCreated(WebView.java:2180) at android.webkit.WebView.setOverScrollMode(WebView.java:2239) at android.view.View.(View.java:3581) at android.view.View.(View.java:3675) at android.view.ViewGroup.(ViewGroup.java:491) at android.widget.AbsoluteLayout.(AbsoluteLayout.java:55) at android.webkit.WebView.(WebView.java:538) at android.webkit.WebView.(WebView.java:483) at android.webkit.WebView.(WebView.java:466) at android.webkit.WebView.(WebView.java:453) at com.myapp.MyWebView.(SourceFile:31) at java.lang.reflect.Constructor.newInstance(Constructor.java) at java.lang.reflect.Constructor.newInstance(Constructor.java:288) at android.view.LayoutInflater.createView(LayoutInflater.java:607) at uk.co.chrisjenx.calligraphy.CalligraphyLayoutInflater.createCustomViewInternal(SourceFile:206) at uk.co.chrisjenx.calligraphy.CalligraphyLayoutInflater.access$000(SourceFile:20) at uk.co.chrisjenx.calligraphy.CalligraphyLayoutInflater$PrivateWrapperFactory2.onCreateView(SourceFile:297) at android.view.LayoutInflater$FactoryMerger.onCreateView(LayoutInflater.java:177) at android.view.LayoutInflater.createViewFromTag(LayoutInflater.java:733) at android.view.LayoutInflater.rInflate(LayoutInflater.java:806) at android.view.LayoutInflater.rInflate(LayoutInflater.java:809) at android.view.LayoutInflater.rInflate(LayoutInflater.java:809) at android.view.LayoutInflater.inflate(LayoutInflater.java:504) at uk.co.chrisjenx.calligraphy.CalligraphyLayoutInflater.inflate(SourceFile:60) at android.view.LayoutInflater.inflate(LayoutInflater.java:414) at android.view.LayoutInflater.inflate(LayoutInflater.java:365) at android.support.v7.app.ActionBarActivityDelegateBase.setContentView(SourceFile:228) at android.support.v7.app.ActionBarActivity.setContentView(SourceFile:102) at com.myapp.ReaderActivity.onCreate(SourceFile:120) at android.app.Activity.performCreate(Activity.java:5933) at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1105) at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2251) at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2360) at android.app.ActivityThread.access$800(ActivityThread.java:144) at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1278) at android.os.Handler.dispatchMessage(Handler.java:102) at android.os.Looper.loop(Looper.java:135) at android.app.ActivityThread.main(ActivityThread.java:5221) at java.lang.reflect.Method.invoke(Method.java) at java.lang.reflect.Method.invoke(Method.java:372) at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:899) at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:694) 

只有从运行棒棒糖的设备。 我已经在我的Nexus 5上testing过了，但是我不能重现这个错误。 我正在使用proguard

我的MyWebView看起来像这样：

 public class MyWebView extends WebView { public static final String tag = MyWebView.class.getName(); private HtmlJSInterfaceNew js; public MyWebView(Context context) { super(context); gd = new GestureDetector(context, sogl); init(); } public MyWebView(Context context, AttributeSet attrs) { super(context, attrs); gd = new GestureDetector(context, sogl); init(); } public MyWebView(Context context, AttributeSet attrs, int defStyle) { super(context, attrs, defStyle); gd = new GestureDetector(context, sogl); init(); } @SuppressLint("NewApi") private void init() { setPadding(0, 0, 0, 0); MyWebViewClient myWebViewClient = new MyWebViewClient(); this.setWebViewClient(myWebViewClient); setWebChromeClient(new MyWebChromeClient()); if(!isInEditMode()) { getSettings().setAllowFileAccess(true); getSettings().setJavaScriptCanOpenWindowsAutomatically(false); getSettings().setJavaScriptEnabled(true); WebSettings webSettings = getSettings(); if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.HONEYCOMB) { webSettings.setAllowContentAccess(false); } webSettings.setUseWideViewPort(true); } } public void addMyJavascriptInterface(HtmlJSInterfaceNew htmlJSInterface, String string) { js = htmlJSInterface; addJavascriptInterface(htmlJSInterface, string); } public class MyWebChromeClient extends WebChromeClient { public void onProgressChanged(WebView view, int progress) { } } } 

根本原因大部分是：

 android.util.AndroidRuntimeException: android.content.pm.PackageManager$NameNotFoundException: com.google.android.webview at android.webkit.WebViewFactory.getFactoryClass(WebViewFactory.java:161) 

所以我想这可能与proguard，也许JavascriptInterface有关。 有任何想法吗？

编辑：从grepcode我find了方法getFactoryClass：

 private static Class<WebViewFactoryProvider> getFactoryClass() throws ClassNotFoundException { Application initialApplication = AppGlobals.getInitialApplication(); try { // First fetch the package info so we can log the webview package version. String packageName = getWebViewPackageName(); sPackageInfo = initialApplication.getPackageManager().getPackageInfo(packageName, 0); Log.i(LOGTAG, "Loading " + packageName + " version " + sPackageInfo.versionName + " (code " + sPackageInfo.versionCode + ")"); // Construct a package context to load the Java code into the current app. Context webViewContext = initialApplication.createPackageContext(packageName, Context.CONTEXT_INCLUDE_CODE | Context.CONTEXT_IGNORE_SECURITY); initialApplication.getAssets().addAssetPath( webViewContext.getApplicationInfo().sourceDir); ClassLoader clazzLoader = webViewContext.getClassLoader(); Trace.traceBegin(Trace.TRACE_TAG_WEBVIEW, "Class.forName()"); try { return (Class<WebViewFactoryProvider>) Class.forName(CHROMIUM_WEBVIEW_FACTORY, true, clazzLoader); } finally { Trace.traceEnd(Trace.TRACE_TAG_WEBVIEW); } } catch (PackageManager.NameNotFoundException e) { // If the package doesn't exist, then try loading the null WebView instead. // If that succeeds, then this is a device without WebView support; if it fails then // swallow the failure, complain that the real WebView is missing and rethrow the // original exception. try { return (Class<WebViewFactoryProvider>) Class.forName(NULL_WEBVIEW_FACTORY); } catch (ClassNotFoundException e2) { // Ignore. } Log.e(LOGTAG, "Chromium WebView package does not exist", e); throw new AndroidRuntimeException(e); } } 

Answer 1

这很可能是在Lollipop的Android系统WebView应用程序更新后的很短时间内发生的。

我在Google Play开发者控制台看到了这个错误，但是也从来没有在Nexus 5上重现过这个错误，不pipe我真的试图阻止我的应用程序访问Android系统WebView应用程序：

 java.lang.RuntimeException: Unable to create application com.uninteresting.app.name: android.util.AndroidRuntimeException: android.content.pm.PackageManager$NameNotFoundException: com.google.android.webview 

然后我们得到了一个消息：我们的应用程序在System WebView应用程序更新后立即在某些设备上崩溃，所以我testing了这个消息。 仍然没有结果，香草Nexus 5拒绝我们的应用程序崩溃！ 所以我尝试了其他厂商的其他手机（其中大约75％来自三星Galaxy设备），突然之间我们一直在崩溃。 我的testing方法：

1. 打开你的应用程序，确保WebView正在显示。
2. 打开Play商店，导航到“我的应用程序”，并调出“Android系统WebView”。 卸载更新。 这不应该让你崩溃，但你应该看到你的应用程序强制重新启动。
3. 打开你的应用程序备份，让它从重新启动恢复。
4. 回到Play商店并更新Android系统WebView。
5. 在更新过程中重新调整您的应用程序。 现在，如果您在受影响的设备上，它应该会崩溃。 如果没有，您的应用程序将被推到背景，并悄悄地重新启动。

我迄今为止所说的一些小警告：

• 我们的应用程序很早就启动了WebView，所以我们为什么在我们的崩溃消息中“无法创build应用程序”。 用户甚至不必看着我们的应用程序崩溃。 我怀疑这是否适用于您，但是如果您的应用程序尝试在此scheme中重新启动包含WebView的活动，则会解释它。
• 我们的报告中有100％来自5.0台设备，我不知道在棒棒糖下面的任何事情上会发生什么。
• 我们看到有这个错误的Nexus 4和Nexus 5的报告，所以我不知道为什么我不能在这些设备上重现它。 可能是一个单独的根源，但我需要进一步研究。

总之，我不会马上认为你在ProGuard或JavascriptInterface中做了什么不正确的事情。 我非常强烈地指责固件是大多数报告的根本原因，导致应该是一个平稳的更新过程，而不是导致一些应用程序彻底崩溃。

编辑：我跑了几个testing，事实certificate，所有没有崩溃的设备是5.0或5.0.1，而所有的设备崩溃是5.0.2，所以我不能舒服地指着我的手指OEMs了。