Handle HTML Javascript onClick event in andorid

// Javascript inabled on webviewmWebview.getSettings().setJavaScriptEnabled(true);

mWebview.addJavascriptInterface(new Object()
{
    @JavascriptInterface           // For API 17+    public void exitApp()
    {
        // Deal with a click on the OK button        finish();
    }
}, "ok");

In Html Page


<center>
<button onclick="ok.exitApp()" style="color: #fff; background-color: #d9534f;">Click here to Exit</button>
</center>

Another Way

Code in HTML

<button type="button" value="someValue" onclick="ok.performClick(this.value);">OK</button>

Java:
WebSettings ws = wv.getSettings();
ws.setJavaScriptEnabled(true);
wv.addJavascriptInterface(new Object()
{
   @JavascriptInterface           // For API 17+ Important Line
   public void performClick(String strl)
   {
      stringVariable = strl;
      Toast.makeText (YourActivity.this, stringVariable, Toast.LENGTH_SHORT).show();
   }
}, "ok");