Intent object to activate the built-in Messaging service. You have to pass MIME type "vnd.android-dir/mms-sms", in setType method of Intent as shown in the following given below code.

Intent intent = new Intent (android.content.Intent.ACTION_VIEW);

intent.putExtra("address", "5556; 5558;");// Send the message to multiple recipient.

itent.putExtra("sms_body", "Hello my friends!");

intent.setType("vnd.android-dir/mms-sms");

startActivity(intent);