How does android send SMS and MMS?

Question

In android sources, I found isms interface, which uses SmsManager.

What class implements this interface? How does it work?
What happens when this method is called, for example sendText?

Answer 1

Use the below link for sending sms. Use SmsManager. Here is a sample project showing the basics of sending an SMS, either through the default client or by using SmsManager. I do not believe there is a public API to send MMS, though.

LINK1

LINK2

or simply use the below code to launch the native Message box

Intent sendIntent = new Intent(Intent.ACTION_VIEW);
//use to fill the sms body
sendIntent.putExtra("sms_body", "Hi this is test sms"); 
sendIntent.setType("vnd.android-dir/mms-sms");
startActivity(sendIntent);