Request Permission SEND_SMS

private static final int MY_PERMISSIONS_REQUEST_SEND_SMS = 1;
 
private void checkForSmsPermission() {
   if (ActivityCompat.checkSelfPermission(this, Manifest.permission.SEND_SMS) != PackageManager.PERMISSION_GRANTED) {
       ActivityCompat.requestPermissions(this, new String[]{Manifest.permission.SEND_SMS}, MY_PERMISSIONS_REQUEST_SEND_SMS);       
   } else {
       // Permission already granted. Enable the SMS button.
       enableSmsButton();
   }
}