无法设置分数ACL公钥android解析

I am working on android app which save score of users in result table in Parse. Now if I want to access the score of users to calculate rank via cloud code I am not able to get it. I guess the reason is ACL, which is not public. And if I manually set the ACL to public read and write for a row, I am able to get the score for that row. So to make that rank code working I have to manually set the ACL to public, which doesn't make any sense. Please help me out.I am working on android app which save score of