With Version 1.9.9k you can now execute Android Uri Intents.
Here's how to send an SMS
Create a PHONE Text field and a BODY Text field.
Create a URI Text Field and add the math equation
="smsto:"+PHONE+"?sms_body="+encode(BODY)
You need to encode the Body to make sure special Uri values are encoded correctly.
You actually can do multiple values following the ?. Separate each with a &
Make sure your unknown values are encoded
?address=encode(Address)&body=encode(body)&more=encode(Value)
Add a button and set the command
Uri Intent SENDTO "yourForm" URI field
In Android Code it would look like this
Intent intent = new Intent(ACTION_SENDTO, Uri.parse("smsto:1234567890")
intent.putExtra("sms_body", BodyValue);
startActivity(intent);