错误设置CPU通过应用缩放省长

问题描述

我要创建一个简单的Andr​​oid应用程序应该设置CPU缩放省长。

I'm creating a simple Android app that should set the CPU Scaling Governor.

要做到这一点我做了这个功能：

To achieve this I made this function:

public static void setCurrentGovernor(String governor){
    Process process;
    try{
        String cpufreq_path= "/sys/devices/system/cpu/cpu0/cpufreq";
        String cmd = "echo `"+governor+"` > "+cpufreq_path+"/scaling_governor ";
        process = Runtime.getRuntime().exec(new String[] {"su","-c",cmd});
    } catch(IOException e){
        e.printStackTrace();
    }
}

我的问题是，这个功能将无法正常工作，再加上超级用户总是提示我要的权限，有没有办法给它超级用户权限仅在第一个应用程序启动？

My problem is that this function won't work, plus superuser always prompts me for permissions, is there a way to give it root permission only at first app boot?

此功能被称为微调的onitemselectedlistener里面，这个功能之后还有另外一个从CPU频率文件中获取数据来更新视图，但如果我这样做猫scaling_governor 我得到老州长，所以它不是一个错误的更新功能。

This function is called inside an onitemselectedlistener of a spinner, right after this function there's another one which fetches data from cpufreq files to update the view, but if i do cat scaling_governor i get the old governor, so it is not a faulty update function.

推荐答案

这更坚实code解决我的问题：

This more solid code solved my problem: Link

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