Did u come up with an anwser for this issue?
On Friday, November 18, 2011 6:23:32 PM UTC+8, alex wrote:
>
> I have a problem that when I click back button on a WebView, my
> previous page losts all contents updated by JavaScript.
>
> My steps in WebView was below:
> - after Main page loaded, JavaScript starts update contents, like
> refresh shoppings with links;
> - user will see some shopping lists after updated;
> - then user click each link will load new url in same WebView;
> - user click back to Main page;
>
> the problem is when user back to Main page, user cannot see any
> shopping updated by JavaScript, they were gone!
> I tried my page on IE and FF, both works fine, but had problem on
> Android WebView. I'm not sure this issue caused by I'm not set some
> settings correctly or other issues.
>
> My sample code as below:
>
> // set settings for webview
> WebSettings webSettings = web.getSettings();
> webSettings.setBuiltInZoomControls(true);
> webSettings.setJavaScriptEnabled(true);
> webSettings.setUseWideViewPort(true);
> webSettings.setDomStorageEnabled(true);
> webSettings.setJavaScriptCanOpenWindowsAutomatically(true);
>
> // call JavaScript to update shoppings
> webView.loadUrl("javascript:addShoppings(" + str + ");");
>
> // add interface for callback
> webView.addJavascriptInterface(new
> BusinessJavaScriptInterface(), "business");
>
> final class BusinessJavaScriptInterface
> {
> public void businessListReceived()
> {
> ... ...
> }
> }
>
> // handle back key event
> public boolean onKeyDown(int keyCode, KeyEvent event)
> {
> WebView web = (WebView) this.findViewById(R.id.browser);
> if (web != null)
> {
> if ((keyCode == KeyEvent.KEYCODE_BACK) && web.canGoBack())
> {
> web.goBack();
> return true;
> }
> return super.onKeyDown(keyCode, event);
> }
> return false;
> }
>
>
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