How To Call A Javascript Function Directly From An Activity In Android?

I wanted to know if there is any way that I can call a JavaScript function from native Android Activity. I came across: webView.loadUrl('javascript:hello()'); But it did not wo

Solution 1:

Android can only call the javascript method if an html page is currently loaded in webView

webView.loadUrl("javascript:hello()");

will call hello method writen in the html page only if the page containing this method is currently loaded in the webview control

first call

webview.loadUrl("Your html page url");

then call

webView.loadUrl("javascript:hello()");

Solution 2:

In case anyone has any issues with this like I did, you need to call your javascript function after the page has finished loading otherwise the javascript won't be called:

    webviewer.loadUrl("file:///android_asset/mypage.html");
    webviewer.setWebViewClient(newWebViewClient() {

        publicvoidonPageFinished(WebView view, String url)
        {
            webviewer.loadUrl("javascript:hello()");
        }
    });