首先，打开蘑菇ROM助手，可以先选择系统精简（精简刷机包里的预装软件），或者再预装内置你自己的APK到刷机包。完成这些，当然也可以陆续进行系统美化，对性能进行优化，预装lib，解包img等等。（还可以对APK进行签名，不过本文主讲ROM签名，小编不闲扯，大家可根据需求自行选择，反正都是傻瓜式的操作，相信大家可以不学自通。）(First, open the mushroom ROM assistant, you can select the system to streamline (streamline the pre packaged software in the brush package), or then pre built your own APK into the brush package. Do these, also can have on the performance of system optimization, beautification, pre lib, unpack the IMG and so on. (can also sign on APK, but the speaker ROM signature, small is not idle, you can choose according to the demand, it is a fool type operation, I believe we can't learn from.))