call android function from javascript

Question

I want to create a button in html and make a call from that button from android through javascript. I have written the following code , which is not working : I am beginner for android.

public class MainActivity extends Activity {

    private static final String PIC_WIDTH = null;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        WebView myWebView = (WebView) findViewById(R.id.webview);

        myWebView.addJavascriptInterface(new JsInterface(), "android");  
myWebView.loadUrl("file:///android_asset/www/index.html");
}

public class JsInterface{  
        public void makeCall()
        {
            Log.i("Myactivity","inside android makecall");
            // Here call any of the public activity methods....
            Intent callIntent = new Intent(Intent.ACTION_CALL);
            callIntent.setData(Uri.parse("tel:9611396958"));
            startActivity(callIntent);
        }
    }


}

in javascript :

<html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en" lang="en">

    <head>
<meta charset="utf-8">
  <meta name="viewport" content="width=device-width, initial-scale=1">
  <meta name="apple-mobile-web-app-capable" content="yes">
  <meta name="apple-mobile-web-app-status-bar-style" content="black">
    <meta http-equiv="Content-Type" content="text/html;charset=utf-8" />

</head>


    <body class="bgClass" id="body" ontouchstart="">

    <script type="text/javascript" src="js/jquery-1.7.2.min.js"></script>   

    <script src="js/myScript.js"></script>
    <button id="makeCall" >CALL</button>
    <script>
      $("#makeCall").click(function(){
        console.log("inside click javascript");
        console.log(window.android);
        android.makeCall();
      });
      </script>
        </body>
</html>

any help??

What does "not working" mean, are you getting error's in the console, is it doing anything, are print out's saying its getting so far etc. — Simon McLoughlin
– Simon McLoughlin, Commented Jan 10, 2014 at 9:18
when i click button nothing happens. It says android is not defined — SSS
– SSS, Commented Jan 10, 2014 at 9:19
@SSS please post your full index.html , I am already in solving stage. so please post full html page from which this js called — Satyaki Mukherjee
– Satyaki Mukherjee, Commented Jan 10, 2014 at 9:39

Hardik Trivedi · Accepted Answer · 2014-01-10 10:17:52Z

3

Make sure your $("#makeCall") method is responding in html.

Then make below changes.It will work.

public class JsInterface{ 
        @JavascriptInterface
        public void makeCall()
        {
            Log.i("Myactivity","inside android makecall");
            // Here call any of the public activity methods....
            Intent callIntent = new Intent(Intent.ACTION_CALL);
            callIntent.setData(Uri.parse("tel:9611396958"));
            startActivity(callIntent);
        }
    }

This annotation allows exposing methods to JavaScript.

answered Jan 10, 2014 at 10:17

Hardik Trivedi

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7 Comments

SSS Over a year ago

If i do that it will give error as : JavascriptInterface cannot be resolved to a type

Hardik Trivedi Over a year ago

@JavascriptInterface is introduced in JellyBean. You need to set the Project Build Target to API Level 17 From Eclipse IDE, go to Project->Properties. Select Android and set the target The APK will work on older versions of android.

Hardik Trivedi Over a year ago

What this console.log("inside click javascript"); console.log(window.android); two lines print ?

SSS Over a year ago

it prints inside click javascript. Then tells window.android is not defined

Hardik Trivedi Over a year ago

As far as I know there is nothing like window.android. Please remove that ? For what purpose you have written that line ?

|

SSS · Accepted Answer · 2014-01-13 05:35:57Z

0

I am answering my own question so that it can help others .:) Finally solved it : myWebView.setWebViewClient(new MyAppWebViewClient()); it was missing so javascript was not working . And i must add @JavascriptInterface as Hardik Trivedi suggested above. It is working fine now.

answered Jan 13, 2014 at 5:35

SSS

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Comments

puneet dubey mudia · Accepted Answer · 2016-02-11 05:55:20Z

0

simply adding webView.getSettings().setJavaScriptEnabled(true); worked for me. must add @JavascriptInterface too.

edited Feb 11, 2016 at 5:55

answered Feb 11, 2016 at 4:49

puneet dubey mudia

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