android webview在一段时间后调用javascript函数

Question

  mWebView = (WebView) findViewById(R.id.activity_main_webview);
  mWebView.setWebViewClient(new WebViewClient(){
  public void onPageFinished(WebView view, String url)
  {
  mWebView.loadUrl("javascript:(function(){"+"document.getElementById('portable-banner-main_1').style.display ='none';"+"})()");
  }
  });
  WebSettings webSettings = mWebView.getSettings();
  webSettings.setJavaScriptEnabled(true);
  mWebView.setBackgroundColor(Color.parseColor("#FFFFFF"));
  mWebView.addJavascriptInterface(new WebAppInterface(this), "Android");
  mWebView.loadUrl(URL);

我正在隐藏一个元素。但页面有一个加载阶段。所以我需要在onPageFinished之后运行那个javascript函数，就像5秒钟一样。我怎么能这样做？

Answer 1

使用处理程序。

   private static int MY_SLEEP = 5000; // wait 5 seconds.

public void onPageFinished(WebView view, String url){
        final Handler handler=new Handler();        
        final Runnable r = new Runnable()
        {
            public void run() 
            {
         mWebView.loadUrl("javascript:(function(){"+"document.getElementById('portable-banner-main_1').style.display ='none';"+"})()");
            }
        };

        handler.postDelayed(r, MY_SLEEP);

   }
 });