java - Android Webview cannot render the pdf sometimes and shows blank/white page instead

Question

• Open the pdf in the webview using google docs
• Open the same pdf or different pdf again and again.
• Sometimes it will show the blank/white page in the android untill we refresh the webpage again for 1 or 2 times.

I have made the sample on the pdf. The link for the project is shown below:

https://github.com/gopalawasthi123/PdfWebView

Hope this will help you Better.

public void SetWebView(WebView webview,string externalUrl){
            webview.Tag = "webview";
            webview.Settings.JavaScriptEnabled = true;
            webview.Settings.SupportZoom ();
            webview.Settings.SetAppCacheEnabled(true);
            webview.Settings.DomStorageEnabled = true;
            webview.ZoomOut ();
            webview.ZoomIn ();
            webview.Settings.BuiltInZoomControls = true;
            webview.Settings.LoadWithOverviewMode = true;
            webview.Settings.UseWideViewPort = true;
            //webview.Settings.SetSupportZoom (true);
            webview.Settings.SetPluginState (WebSettings.PluginState.On);
            webview.Settings.GetPluginState ();
            if (externalUrl.StartsWith("http://") || externalUrl.StartsWith("https://"))
                webview.LoadUrl (externalUrl);
            webview.SetWebViewClient (new MonkeyWebViewClient (imgViewBack, imgViewForward, imgRefresh));
            webview.SetWebChromeClient (new WebChromeClient ());
        }

Answer 1

You can reload the page until it displays the pdf in this way:

public void onPageFinished(WebView view, String url) {
if (view.getTitle().equals(""))
    view.reload();
}