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);      }