btRecord.setOnClickListener(new OnClickListener() {

        public void onClick(View arg0) {


            try {
                recorder.prepare();
            } catch (IllegalStateException e) {
                // TODO Auto-generated catch block
                e.printStackTrace();
            } catch (IOException e) {
                // TODO Auto-generated catch block
                e.printStackTrace();
            }
        try{
            recorder.start();
                            /**** i need a method like recorder.Volume(); ***/
        }catch(Exception ex)
        {}