Question

62

Run javascript code in Webview

rated 0 times [ 67] [ 5] / answers: 1 / hits: 28287 / 9 Years ago, sun, august 23, 2015, 12:00:00

I have a webview i am using in android and I'm trying to trigger javascript on a button click. I'm trying to use the code below to change the color of the class to red. But I cant seem to get it working

final WebView wb=(WebView)findViewById(R.id.webView2);

wb.loadUrl(javascript:

                + var FunctionOne = function () {

                +   try{document.getElementsByClassName('test')[0].style.color='red';}catch(e){}

                + };);

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jimmieo

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answered 9 Years ago irvinjovannix · Accepted Answer

From kitkat onwards use evaluateJavascript method instead loadUrl to call the javascript functions like below

    if (android.os.Build.VERSION.SDK_INT >= android.os.Build.VERSION_CODES.KITKAT) {

        webView.evaluateJavascript(var FunctionOne = function () {

            +   try{document.getElementsByClassName('test')[0].style.color='red';}catch(e){}

            + };, null);

    } else {

        webView.loadUrl(javascript:

            + var FunctionOne = function () {

            +   try{document.getElementsByClassName('test')[0].style.color='red';}catch(e){}

            + };);

    }

Enable Javascript for your webview by adding the following line

wb.getSettings().setJavaScriptEnabled(true);