安卓系统文件变更许可 [英] Android : change permission of system files

问题描述

我的手机是植根我写code。在我的应用程序，以改变它位于/ SYS /班/ LED灯/ LCD背光/亮度系统文件的文件权限

My phone is rooted and i wrote code in my app to change file permission of system file which is located at /sys/class/leds/lcd-backlight/brightness

Runtime.getRuntime().exec("su");
Runtime.getRuntime().exec("chmod 777 /sys/class/leds/lcd-backlight/brightness");

但这code不能更改指定的文件的文件许可权，我不会有任何错误或异常的

but this code can't change the file permission of the specified file and i won't got any kind of error or exception

推荐答案

从这个链接 https://github.com/Stericson/RootTools/releases

把该.jar文件到您的项目的库目录

Put that .jar file into your project's 'libs' directory

import com.stericson.RootTools.*;

。

Command cmd=new Command(0,"chmod 766 /sys/class/leds/lcd-backlight/brightness");
RootShell.getShell(true).add(cmd);

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