title: Android WebView shows content only after a click/scroll
body: <p>I am writing an Android app cotaining a webview, which loads a page including a rather large form. I show a progress bar during the loading of the form. When the progress bar disappears, I often see only a blank page or some few elements of the form (like few of the checkboxes, no text). After I try to scroll the page (click), everything shows up. Any idea of what's wrong here? </p>
  
  <p>The settings of the webview are:</p>
  
  <pre><code>mWebView.getSettings().setJavaScriptEnabled(true);
  mWebView.getSettings().setDatabaseEnabled(true);
  mWebView.getSettings().setDomStorageEnabled(true);
  mWebView.getSettings().setAppCacheMaxSize(1024*1024*128);
  mWebView.getSettings().setAppCachePath(getActivity().getApplicationContext().getCacheDir().getAbsolutePath());
  mWebView.getSettings().setAllowFileAccess(true);
  mWebView.getSettings().setAppCacheEnabled(true);
  mWebView.getSettings().setCacheMode(WebSettings.LOAD_DEFAULT);
  mWebView.setWebChromeClient(new WebChromeClient() {
         @Override
         public void onExceededDatabaseQuota(String url,
                              String databaseIdentifier,
                              long currentQuota,
                              long estimatedSize,
                              long totalUsedQuota,
                              WebStorage.QuotaUpdater quotaUpdater)
         {
             quotaUpdater.updateQuota(estimatedSize * 2);
         }
      });
  mWebView.addJavascriptInterface(new WebFormJavascriptInterface(), "jsinterface");
  mWebView.getSettings().setRenderPriority(RenderPriority.HIGH);
  mWebView.getSettings().setPluginState(android.webkit.WebSettings.PluginState.ON_DEMAND);
  </code></pre>
  
  <p>and the layout file is:</p>
  
  <pre><code>&lt;?xml version="1.0" encoding="utf-8"?&gt;
  &lt;RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
  android:layout_width="match_parent"
  android:layout_height="match_parent"&gt;
  &lt;WebView  xmlns:android="http://schemas.android.com/apk/res/android"
      android:id="@+id/webview"
      android:layout_width="match_parent"
      android:layout_height="match_parent"
      android:hardwareAccelerated="false"
      android:persistentDrawingCache="all"
  /&gt;
  &lt;ProgressBar
      android:id="@+id/progressbar"
      style="@android:style/Widget.Holo.ProgressBar.Large"
      android:layout_width="wrap_content"
      android:layout_height="wrap_content"
      android:layout_centerHorizontal="true"
      android:layout_centerVertical="true"
      android:indeterminate="true"
      android:visibility="gone"/&gt;
  &lt;/RelativeLayout&gt;
  </code></pre>