These are the APIs that Google has so far left out of the Android echosystem for easily sending any type of message without digging through source code and what not.
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I feel like this should be an important part of the Android APIs, yet it is all missing so this is my go at it!
Here you go: http://android-developers.blogspot.de/2013/10/getting-your-sms-apps-ready-for-kitkat.html
It will be included in Android 4.4 Kitkat.