sit(a, "action","android.intent.action.SENDTO") 
sit(a,"type","vnd.android-dir/mms-sms")
sit(a, "data", "smsto:10086") 
sit(a,"extra","sms_body","短信内容")
uit(a, "chooser", "发短信")
直接发短信<由于防止恶意发短信不提供直接发短信方法>