1、安装koreader.apk
2、随便建个txt，取名patch，将这段代码粘贴进去:
local screen = require("android").screen
screen.height = screen.height - 120
require("jit.opt").start("sizemcode=64","maxmcode=512", "recunroll=8", "callunroll=12", "loopunroll=60", "instunroll=16", "tryside=16", "hotexit=160", "hotloop=1792", "maxsnap=160000", "maxside=32000", "maxirconst=160000", "maxrecord=1280000", "maxtrace=320000")
for i=1,1000 do end -- Force allocation of one large segment
3、根据你电子书的屏幕损坏情况修改上步代码中的数值120，屏幕坏了多少就修改为多少，这个是像素单位，自己试吧。将上步的txt文件后缀改为lua，再将patch.lua文件拷贝到koreader安装目录下，大功告成，最终效果如图，相当于是屏蔽了坏的那部分屏幕
