一、LK层：首先，在LK中，有一个对log打印级别的控制文档，其路径一般为：vendor\mediatek\proprietary\bootable\bootloader\lk\include\debug.h（以mtk平台为例）在include\debug.h重要代码为：//下面做个判断:意思是如果makefile(相应的平台mk文件) 定义了DEBUG的值，就是用它，否则默认为2等级//...

git cherry-pick +commitIt took 2.01 seconds to enumerate untracked files. 'status -uno'may speed it up, but you have to be careful not to forget to addnew files yourself (see 'git help status')....

１．使用需要添加对应的头文件,同时需要在Android.mk文件中加入库libcutils.#include <cutils/properties.h>2.property_get/property_set 函数原型/* property_get: returns the length of the value which will never be** greater than PR