Android studio logcat中出现 W/TestGrouping: Invalid Package: '' could not be found or has no tests

```W/TestGrouping: Invalid Package: '' could not be found or has no tests

```E/System.out: http://192.168.1.103:8080/StudentAffairsService/servlet/ServletService?Action=login&loginid=2001&password=111111&typename=教师

I/System.out: http://192.168.1.103:8080/StudentAffairsService/servlet/ServletService?Action=login&loginid=2001&password=111111&typename=教师&ran=0.7501475871647573
然后我的app一直就登录不上