How to make call directly in Android?

For Android app when I was use intent .. just open the call withe number not make the call, how I can make the call direct, I want to make the call not open the call, how to make that that?

a = "tel:"+"*1400*" + E.getText().toString()+"*"+ sharedPreferences.getString("identity", "")+"#";
Intent e = new Intent(Intent.ACTION_DIAL);
e.setData(Uri.parse(a.trim()));
e.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
startActivity(e);