and the main idea i want to say ,it's about the miui theme problem.someone said that they can't change the theme. and iwill tell you my mind.
1. create a new folder in data/system/theme
if you don't find the "theme " folder, add it.and don't put anything in this new folder.
2 the Miui theme you download don't need to move to that new folder.
3 when you want to change the theme. remember don't select the lock style or you will stay in the lockscreen forever !
that's all. thank you~