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How to call javascript function from android -Cordova/Phonegap

I'm using cordova/phonegap to make a Android app and trying to call JavaScript funtion from android/native

My main acitvity:-

public class MainActivity extends CordovaActivity
{
    @Override
    public void onCreate(Bundle savedInstanceState)
    {
        super.onCreate(savedInstanceState);


        // Set by <content src="index.html" /> in config.xml
        loadUrl(Url);

        // TODO call javascripte from here 

    }
}

My index.html page

<!DOCTYPE HTML>
    <html>
      <head>
        <title>PhoneGap</title>

        <script type="text/javascript" charset="utf-8">

        function myFun(){
          alert("call from the ANDROID");
        }
        </script>

    </head>
    <body >
    </body>
    </html>

I want call JavaScript function from phonegap.

试试这个代码

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

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