有人可以一劳永逸地解释不能调用determinVisibility() - 从未看到pid的连接

Question

我目前正致力于通过d3将数据绘制到webview中.当然,一旦我尝试重新加载图表并提供新数据,事情就会破裂.这条可爱的线条不断涌现:W/cr_BindingManager: Cannot call determinedVisibility() - never saw a connection for the pid.

我已经搜索了SO以获得解释,但似乎没有任何结论.人们只是建议在webview设置中打开DOM存储(这显然无法解决问题).我怀疑在重新加载图表和提供新数据之间存在竞争条件.我在我的WebViewClient中重写了onPageFinished()来调用监听器将数据加载到图表中,认为它可以解决竞争条件,但无济于事.

有人可以向我解释一下是什么W/cr_BindingManager: Cannot call determinedVisibility() - never saw a connection for the pid意思吗？我评价过了吗？我该怎么调试呢？

任何提示都表示赞赏.

编辑:我已经解决了原始问题,但我仍然希望了解该行的含义.赏金.

Answer 1

连续打电话loadUrl导致竞争条件.问题是loadUrl("file://..")没有立即完成,所以当你调用loadUrl("javascript:..")它时,有时会在页面加载之前执行.
这是我设置我的方式webview:

wv = (CustomWebView) this.findViewById(R.id.webView1);

WebSettings wv_settings = wv.getSettings();

//this is where you fixed your code I guess
//And also by setting a WebClient to catch javascript's console messages :

wv.setWebChromeClient(new WebChromeClient() {
        public boolean onConsoleMessage(ConsoleMessage cm) {
            Log.d(TAG, cm.message() + " -- From line "
                    + cm.lineNumber() + " of "
                    + cm.sourceId() );
            return true;
        }
    });
wv_settings.setDomStorageEnabled(true);

wv.setWebViewClient(new WebViewClient() {
        @Override
        public void onPageFinished(WebView view, String url) {
            super.onPageFinished(view, url);
            setTitle(view.getTitle());
            //do your stuff ...
            }
        @Override
        public boolean shouldOverrideUrlLoading(WebView view, String url) {
        if (url.startsWith("file")) 
        {
            // Keep local assets in this WebView.
             return false;
        }
      }
    });

//wv.setWebViewClient(new HelpClient(this));//
wv.clearCache(true);
wv.clearHistory();
wv_settings.setJavaScriptEnabled(true);//XSS vulnerable
wv_settings.setJavaScriptCanOpenWindowsAutomatically(true);
wv.loadUrl("file:///android_asset/connect.php.html");

注意这一行wv.setWebChromeClient(new WebChromeClient());

在API级别19(Android 4.4 KitKat)中,浏览器引擎从切换Android webkit到chromium webkit,几乎所有原始WebView API's包装到对应的chromium webkit.

这是从Chromium源提供错误(BindingManagerImpl.java)的方法:

@Override
public void determinedVisibility(int pid) {
    ManagedConnection managedConnection;
    synchronized (mManagedConnections) {
        managedConnection = mManagedConnections.get(pid);
    }
    if (managedConnection == null) {
        Log.w(TAG, "Cannot call determinedVisibility() - never saw a connection for the pid: "
                + "%d", pid);
        return;
    }

这是内容的渲染警告.
您可以在github源代码中永远地挖掘,可能很高兴看到从...调用方法determinedVisibility(in BindingManagerImpl.java)的位置(后缀"Impl"用于实现).希望这会有所帮助; O)