使用卓望发送短信的时候，短信内容需要设置ENCODE_TYPE
String ENCODE_TYPE="UNIC";
String MSG_CONTENT=stringToHex("短信内容",ENCODE_TYPE);
否则会报错 java.io.IOException: Server returned HTTP response code: 400
String ENCODE_TYPE="UNIC";
String MSG_CONTENT=stringToHex("短信内容",ENCODE_TYPE);
否则会报错 java.io.IOException: Server returned HTTP response code: 400