Android SmsManager 发送长中文短信闪退，如果是英文则不会。为什么？

SmsManager sm = SmsManager.getDefault();
ArrayList<String> msgs = sm.divideMessage(content);
for (String string : msgs) {
if (string != null) {
sm.sendTextMessage(phone, null, string, null, null);
}
Toast.makeText(getApplicationContext(), "发送完毕", Toast.LENGTH_SHORT)
.show();
}