What's the best way for an Android application to send SMS messages?

There is Sms Manager API for this SmsManager smsManager = SmsManager.getDefault(); smsManager.sendTextMessage("phoneNo", null, "sms message", null, null); you need to add permission in manifest file. <uses-permission android:name="android.permission.SEND_SMS" /> you can google it or you can read http://developer.android.com/reference/android/telephony/SmsManager.html for more info.

Hello, There are so many Applications through which you can send SMS from Android phone. It depends, what’s your requirement i.e. you want to send SMS as one to one or one to many. Some of the apps are charging for these facilities and some are free, It all depends on what Option you opt. Below are some apps which will help you in sending massages . For Example: Google Messenger, My SMS, Messaging (stock Kit Kat SMS app),chomp SMS, Textra SMS, Hover Chat, QKSMS , Hand cent SMS ,hello SMS, Text Secure, Evolve SMS and so many. Please note that if you want to send some http://www.kapsystem.com or Informational SMS at corporate level, you will have to opt for http://www.kapsystem.com. Lots of companies are providing these facilities.    Note that if you want http://www.kapsystem.comfacilities then it required internet connectivity, wherever you install NON Web based Application,there must be needed to connect internet for software functioning. Web Based Bulk Sms Application can be used from anywhere.   We Kapsystem, BULK SMS Provider, having expertise team to support all the features of BULK SMS Service.   To know about more Bulk Sms Services, you can reach http://Kapsystem.com/new/freedemo1.php .

Check this small example with 2 approuch to send sms: https://github.com/gorbin/asamples/tree/master/app/src/main/java/com/example/asamles/app/sms Don't forget about permissions!