//获取短信管理器
SmsManager smsManager = SmsManager.getDefaut();
//destinationAddress:收件人的电话号码
//scAddress:发件人的地址
//text:发送的短信的内容
//smsManager.sendTextMessage(destinationAddress,scAddress,text,sentIntent,deliveryIntent);
smsManager.sendTextMessage("13210377689",null,"nihao",null,null);
需要权限:SEND_SMS