Webview加载-内容加载完成检查

Question

I'm creating an app hosted on a cloud service(heroku) that sleeps every 30 minutes of inactivity. The app shows a loading activity when the page loads. Since the server sleeps every 30 minutes of no request to it, response time may vary from 2 to 12 seconds. I'm trying to find a way to know if content fully loaded with CSS and JS. onPageFinished event doesn't work for me, most times I get a blank page.

 public void load(){
    webView = (WebView) findViewById(R.id.web);
    webView.getSettings().setJavaScriptEnabled(true);
    webView.getSettings().setJavaScriptCanOpenWindowsAutomatically(true);
    webView.loadUrl(serverURL);
    webView.setWebViewClient(new WebViewClient() {
        @Override
        public boolean shouldOverrideUrlLoading(WebView view, String url) {
            view.loadUrl(url);
            return false;
        }
        public void onPageFinished(WebView view, String url) {
            LoadingActivity la = new LoadingActivity();
            if(la.isNetworkAvailable(MainActivity.this))
                LoadingActivity.current.finish();
            /* This event is called before all content loaded */
        }
    });
    webView.setOnTouchListener(new View.OnTouchListener() {
        @Override
        public boolean onTouch(View v, MotionEvent event) {
            return (event.getAction() == MotionEvent.ACTION_MOVE);
        }
    });
}

Answer 1

您可以尝试在webView上设置WebChrome客户端，它具有负载百分比事件，您可以尝试收听该客户端。

Answer 2

我发现最简单的方法就是从javascript文档ready函数中调用java。