Android-未知的 webview 崩溃原因

Question

我有一个类，它有自己的 Activity ，基本上我用它来托管 WebView 。它在大多数设备上工作正常，但在 motorolla droid Bionic 上，加载页面时每隔一段时间就会发出此错误。

java.lang.NullPointerException
at android.webkit.WebView.sendOurVisibleRect(WebView.java:2384)
at android.webkit.WebView.onScrollChanged(WebView.java:4820)
at android.view.View.scrollTo(View.java:5016)
at android.webkit.WebView.onOverScrolled(WebView.java:2603) 
at android.view.View.overScrollBy(View.java:8890)
at android.webkit.WebView.computeScroll(WebView.java:3004)
at android.view.ViewGroup.drawChild(ViewGroup.java:1562)
at android.view.ViewGroup.dispatchDraw(ViewGroup.java:1373)
at android.view.ViewGroup.drawChild(ViewGroup.java:1644)
at android.view.ViewGroup.dispatchDraw(ViewGroup.java:1373)
at android.view.ViewGroup.drawChild(ViewGroup.java:1644)
at android.view.ViewGroup.dispatchDraw(ViewGroup.java:1373)
at android.view.ViewGroup.drawChild(ViewGroup.java:1644)
at android.view.ViewGroup.dispatchDraw(ViewGroup.java:1373)
at android.view.View.draw(View.java:6883)
at android.widget.FrameLayout.draw(FrameLayout.java:357)
at com.android.internal.policy.impl.PhoneWindow$DecorView.draw(PhoneWindow.java:2106)
at android.view.ViewRoot.draw(ViewRoot.java:1562)
at android.view.ViewRoot.performTraversals(ViewRoot.java:1298)
at android.view.ViewRoot.handleMessage(ViewRoot.java:1911)
at android.os.Handler.dispatchMessage(Handler.java:99)
at android.os.Looper.loop(Looper.java:130)
at android.app.ActivityThread.main(ActivityThread.java:3821)
at java.lang.reflect.Method.invokeNative(Native Method)
at java.lang.reflect.Method.invoke(Method.java:507)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:839)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:597)
at dalvik.system.NativeStart.main(Native Method)

使用调试器排除故障后，我无法理解空指针的来源......有人在 droid Bionic 上遇到类似的问题吗？或与此相关的其他设备。

Answer 1

您需要在调用 destroy 之前从布局中删除 WebView

Destroy the internal state of the WebView. This method should be called after the WebView has been removed from the view system. No other methods may be called on a WebView after destroy.