如何在Android webview中捕获此异常？

Question

由于Android 4.3中存在错误,我的应用在尝试在webview中加载某些网页时崩溃了

堆栈跟踪如下:

09-16 14:16:48.221: E/AndroidRuntime(22487): FATAL EXCEPTION: WebViewCoreThread
09-16 14:16:48.221: E/AndroidRuntime(22487): java.lang.StringIndexOutOfBoundsException: length=0; index=-1
09-16 14:16:48.221: E/AndroidRuntime(22487):    at java.lang.AbstractStringBuilder.indexAndLength(AbstractStringBuilder.java:212)
09-16 14:16:48.221: E/AndroidRuntime(22487):    at java.lang.AbstractStringBuilder.charAt(AbstractStringBuilder.java:206)
09-16 14:16:48.221: E/AndroidRuntime(22487):    at java.lang.StringBuffer.charAt(StringBuffer.java:346)
09-16 14:16:48.221: E/AndroidRuntime(22487):    at com.android.org.bouncycastle.asn1.x509.X509NameTokenizer.nextToken(X509NameTokenizer.java:78)
09-16 14:16:48.221: E/AndroidRuntime(22487):    at com.android.org.bouncycastle.asn1.x509.X509Name.<init>(X509Name.java:719)
09-16 14:16:48.221: E/AndroidRuntime(22487):    at com.android.org.bouncycastle.asn1.x509.X509Name.<init>(X509Name.java:655)
09-16 14:16:48.221: E/AndroidRuntime(22487):    at com.android.org.bouncycastle.asn1.x509.X509Name.<init>(X509Name.java:593)
09-16 14:16:48.221: E/AndroidRuntime(22487):    at android.net.http.SslCertificate$DName.<init>(SslCertificate.java:379)
09-16 14:16:48.221: E/AndroidRuntime(22487):    at android.net.http.SslCertificate.<init>(SslCertificate.java:189)
09-16 14:16:48.221: E/AndroidRuntime(22487):    at android.net.http.SslCertificate.<init>(SslCertificate.java:178)
09-16 14:16:48.221: E/AndroidRuntime(22487):    at android.webkit.BrowserFrame.setCertificate(BrowserFrame.java:1206)
09-16 14:16:48.221: E/AndroidRuntime(22487):    at android.webkit.JWebCoreJavaBridge.nativeServiceFuncPtrQueue(Native Method)
09-16 14:16:48.221: E/AndroidRuntime(22487):    at android.webkit.JWebCoreJavaBridge.handleMessage(JWebCoreJavaBridge.java:113)
09-16 14:16:48.221: E/AndroidRuntime(22487):    at android.os.Handler.dispatchMessage(Handler.java:99)
09-16 14:16:48.221: E/AndroidRuntime(22487):    at android.os.Looper.loop(Looper.java:137)
09-16 14:16:48.221: E/AndroidRuntime(22487):    at android.webkit.WebViewCore$WebCoreThread.run(WebViewCore.java:814)
09-16 14:16:48.221: E/AndroidRuntime(22487):    at java.lang.Thread.run(Thread.java:841)

在我的webview中,我有onReceivedSslError,并且覆盖了onReceivedError方法,但它们都没有能够捕获此异常.

try{
    webview.postUrl(url, EncodingUtils.getBytes(data, "BASE64"));
}
catch(Exception e){
    System.out.println("Caught the exception!");
}

使用try/catch块(如上所述)调用postUrl也不会捕获异常.

有没有办法捕获此异常,以便我可以显示有意义的错误消息而不是让应用程序崩溃？

Answer 1

您可能必须尝试设置全局未捕获的异常处理程序.您可以通过扩展Application并在其中定义未捕获的异常处理程序来完成此操作.它看起来像这样:

public class MyApplication extends Application {

    @Override
    public void onCreate() {
        super.onCreate();

        Thread.setDefaultUncaughtExceptionHandler(new Thread.UncaughtExceptionHandler() {
            @Override
            public void uncaughtException(Thread thread, final Throwable ex) {
                // Custom code here to handle the error.
            }
        });
    }

}

只需确保在Manifest中指向自定义Application类.
试一试.希望能帮助到你.