Android open URL in browser without left activity

i have a activity with Media Player playing stream audio and one image linked to a Website. If i click on the link, the audio stream stop because left the activity. How i can to open the browser and don't leave the activity?. Thanks a lot. Piero.

        ...

        img.setOnClickListener(new View.OnClickListener(){
        public void onClick(View v){
            Intent intent = new Intent();
            intent.setAction(Intent.ACTION_VIEW);
            intent.addCategory(Intent.CATEGORY_BROWSABLE);
            intent.setData(Uri.parse("http://testsite.com"));
            startActivity(intent);
        }
    });