Could someone once and for all please explain Cannot call determinedVisibility() - never saw a connection for the pid

Consecutive calls to loadUrl cause a race condition. The problem is that loadUrl("file://..") doesn't complete immediately, and so when you call loadUrl("javascript:..") it will sometimes execute before the page has loaded.
This is how I setup my 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 vulnerablewv_settings.setJavaScriptCanOpenWindowsAutomatically(true);wv.loadUrl("file:///android_asset/connect.php.html");

NOTE this line wv.setWebChromeClient(new WebChromeClient());

In API level 19 (Android 4.4 KitKat), the browser engine switched from Android webkit to chromium webkit, with almost all the original WebView API's wrapped to the counterparts of chromium webkit.

This is the method that gives the error (BindingManagerImpl.java), from Chromium source:

@Overridepublic 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;    }

It's a rendering warning from content.
You can dig around forever in that github source code, might be nice to see where the method determinedVisibility (in BindingManagerImpl.java) is called from...(suffix “Impl” for Implementation).Hope this helps ;O)

This usually pops up when you are overriding the method shouldOverrideUrlLoading().

From my WebView usages on prior apps, this is due to what is being rendered on the WebView, what is being caught on the above method and in turn ignored.I see this a lot when the websites that I load attempt to load scripts outside of the allowed domain.