How to get click event on a html button from webview? [duplicate]

Question

This question may sound basic for many of you. But please take a look at my actual problem. I am setting content of my WebView dynamically in my android application. And I am able to set text in it without having any problem but my problem is I need to add some button dynamically into my WebView as below

for (Address address : (List<Address>) childDataList.get(3)) {

    if (!address.getName().equalsIgnoreCase("")) {
        text.append("<b>").append(address.getName()).append("</b>");
    }


    /*  dynamic button in html */
   //text.append("<br>").append("<a href=\"http://www.google.com\" target=\"_parent\"><button>Navigation </button></a>");   // this is working
   text.append("<br>").append("<button type=\"button\" onclick=\"ok.performClick();\">Navigation</button>");    // not able to make it work
   text.append("<br><br>");

}

And I am calling this method using the below code:

WebSettings ws = wv.getSettings();
ws.setJavaScriptEnabled(true);
wv.addJavascriptInterface(new Object()
{
  public void performClick()
  {
    //Print Toast
  }
}, "ok");

However performClick() method is not calling on button click, while it is working perfectly incase of direct url. So if you have any suggestion or link please provide for me.

I followed android html button onclick event and webviews html button click detection in activityjava code and detect click on html button through javascript in android webview link, but I am unable get my requirement done.

And I am setting my webview text programmatically Android code not in Javascript. So please take a look at my question before marking it as duplicate or if I missing something then guide me.

Mikhail Naganov · Accepted Answer · 2015-05-07 18:37:25Z

0

You need to annotate performClick with @JavascriptInterface (doc) in your Java code:

wv.addJavascriptInterface(new Object()
{
    @JavascriptInterface
    public void performClick()
    {
        //Print Toast
    }
}, "ok");

Also, make sure that you are calling addJavascriptInterface before loading your page.

answered May 7, 2015 at 18:37

Mikhail Naganov

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2 Comments

user1530779 Over a year ago

I have a doubt here does the name performClick has to match both in Java as well as javascript if i change perform click to any other text will the click still work ?

Mikhail Naganov Over a year ago

Yes, your calls in JavaScript must use the name of the Java function. If you rename it, you will have to change your JavaScript code accordingly.

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