loading large html in android webview part by part

Question

Since loading a large html in android webview is very slow. I would like to load it partially and as user scrolls down I load the rest.

I am using

webview.loadDataWithBaseURL("file:///android_asset/css/",
                    htmlString, "text/html", "UTF-8", null);

and I know I can use

webview.setOnScrollChangeListener(new View.OnScrollChangeListener() {
                @Override
                public void onScrollChange(View v, int scrollX, int scrollY, int oldScrollX, int oldScrollY) {

                }
            });

but I do not know how to append the rest of html as user scrolls.

I do not want to keep loading the whole page as user scrolls

that should be handled through html code ( not through web view ). achieving that in html will give you more freedom to display. — Amod Gokhale, Sep 14 '16 at 15:57

score 0 · Answer 1 · answered Sep 14 '16 at 15:58

0

Seems like there is no way to load html partly , because when u call

webview.loadDataWithBaseURL("file:///android_asset/css/",
                htmlString, "text/html", "UTF-8", null);

or

webview.loadUrl("http://www.google.com");

your webView loads the entire html file, so I think u should show some animation with spinner while loading will not be completed, like here:

mWebView.setWebViewClient(new WebViewClient() {
    public void onPageFinished(WebView view, String url) {
        // Hide your spinner 
    }
});

answered Sep 14 '16 at 15:58

Hayk Petrosyan

363
1
6

I have a spinner and that is not the issue. Issue is to make it load faster. – Omid Aminiva Sep 14 '16 at 16:03
maybe this link will help you to make it faster http://stackoverflow.com/questions/32304237/android-webview-loading-data-performance-very-slow – Hayk Petrosyan Sep 14 '16 at 16:06
If your html is very big, u can't do anything. because webview need some time for loading, and time depends to html size. – Hayk Petrosyan Sep 14 '16 at 16:16
note true. AmodGokhale suggestion was good to use html to do load more – Omid Aminiva Sep 14 '16 at 16:18

loading large html in android webview part by part

1 Answers1