Java 更改android设备上的U调控器
嗨,伙计们,我正试图用这段代码更改android设备上的缩放控制器Java 更改android设备上的U调控器,java,android,linux,cpu,frequency,Java,Android,Linux,Cpu,Frequency,嗨,伙计们,我正试图用这段代码更改android设备上的缩放控制器 String[] args = {"/system/bin/echo userspace >", "/sys/devices/system/cpu/cpu0/cpufreq/scaling_governor"}; ProcessBuilder cmd1; cmd1 = new ProcessBuilder(args); Process process = cmd1.start(); 但是什么都没有改变:(我做错了什
String[] args = {"/system/bin/echo userspace >", "/sys/devices/system/cpu/cpu0/cpufreq/scaling_governor"};
ProcessBuilder cmd1;
cmd1 = new ProcessBuilder(args);
Process process = cmd1.start();
但是什么都没有改变:(我做错了什么??你的程序是以
根目录运行的吗(euid==0
)
缩放调控器仅限于通过根进行写入:
-rw-r--r-- 1 root root 4096 2011-01-30 13:45 /sys/devices/system/cpu/cpu0/cpufreq/scaling_governor