public void onClick(View v) {
        sendSMS("5556", "Neki moj tekst koji saljem.");
    }




    public void onSMSIntentClick(View v) {

        if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.KITKAT) //for new versions
        {
             Intent i = new Intent(Intent.ACTION_VIEW, Uri.parse("sms:" + 5556));
             i.putExtra("sms_body", "Moj tekst koji saljem.");
             startActivity(i);

        }
        else // For early versions, do what worked before.
        {
            Intent i = new Intent(Intent.ACTION_VIEW);
            i.setType("vnd.android-dir/mms-sms");
            i.putExtra("address", "5556");
            i.putExtra("sms_body","Moj tekst koji saljem.");
            startActivity(i);
        }



    }

    //sends an SMS message to another device
    private void sendSMS(String phoneNumber, String message)
    {
        SmsManager sms = SmsManager.getDefault();
        sms.sendTextMessage(phoneNumber, null, message, null, null);
    }