android app下运行linux脚本代码

场景

在@函兮的要求下，在手机root的情况下，完整的利用八核的性能，将linux代码写入到android 手机上，通过app的形式，进行测试。

代码

# 强制读写系统分区
busybox mount -o rw,remount /dev/block/bootdevice/by-name/system
# busybox mount -o rw,remount /dev/block/platform/msm_sdcc.1/by-name/system
# 开始设置性能 当前模式：性能模式
stop thermald
stop mpdecision
stop thermal-engine
echo 0 > /sys/module/msm_thermal/core_control/enabled
echo 1 > /sys/devices/system/cpu/cpu0/online
echo 1 > /sys/devices/system/cpu/cpu1/online
echo 1 > /sys/devices/system/cpu/cpu2/online
echo 1 > /sys/devices/system/cpu/cpu3/online
echo 1 > /sys/devices/system/cpu/cpu4/online
echo 1 > /sys/devices/system/cpu/cpu5/online
echo 1 > /sys/devices/system/cpu/cpu6/online
echo 1 > /sys/devices/system/cpu/cpu7/online
busybox echo performance > /sys/devices/system/cpu/cpu0/cpufreq/scaling_governor
busybox echo performance > /sys/devices/system/cpu/cpu3/cpufreq/scaling_governor
busybox echo performance > /sys/devices/system/cpu/cpu4/cpufreq/scaling_governor
busybox echo performance > /sys/devices/system/cpu/cpu5/cpufreq/scaling_governor
busybox echo performance > /sys/devices/system/cpu/cpu7/cpufreq/scaling_governor
echo performance > /sys/class/kgsl/kgsl-3d0/devfreq/governor
# busybox echo 0 > /sys/devices/soc.0/fdb00000.qcom,kgsl-3d0/kgsl/kgsl-3d0/min_pwrlevel
# busybox echo 4 > /sys/devices/system/cpu/cpu4/core_ctl/min_cpus
# 缓存目录权限应当为777
busybox chmod -R 777 /data/local/tmp/
tmp=/data/local/tmp/80rompk_error.txt

工具类的代码：

public final class RootCmd
{
//执行linux命令并且输出结果
protected static Vector execRootCmd(String paramString)
{
Vector localVector = new Vector();
try
{
Process localProcess = Runtime.getRuntime().exec("su ");//经过Root处理的android系统即有su命令
OutputStream localOutputStream = localProcess.getOutputStream();
DataOutputStream localDataOutputStream = new DataOutputStream(localOutputStream);
InputStream localInputStream = localProcess.getInputStream();
DataInputStream localDataInputStream = new DataInputStream(localInputStream);
String str1 = String.valueOf(paramString);
String str2 = str1 + "\n";
localDataOutputStream.writeBytes(str2);
localDataOutputStream.flush();
String str3 = localDataInputStream.readLine();
localVector.add(str3);
localDataOutputStream.writeBytes("exit\n");
localDataOutputStream.flush();
localProcess.waitFor();
return localVector;
}
catch (Exception localException)
{
localException.printStackTrace();
}
}

//执行linux命令但不关注结果输出
protected static int execRootCmdSilent(String paramString)
{
try
{
Process localProcess = Runtime.getRuntime().exec("su");
Object localObject = localProcess.getOutputStream();
DataOutputStream localDataOutputStream = new DataOutputStream((OutputStream)localObject);
String str = String.valueOf(paramString);
localObject = str + "\n";
localDataOutputStream.writeBytes((String)localObject);
localDataOutputStream.flush();
localDataOutputStream.writeBytes("exit\n");
localDataOutputStream.flush();
localProcess.waitFor();
localObject = localProcess.exitValue();
return localObject;
}
catch (Exception localException)
{
localException.printStackTrace();
}
}

//判断机器Android是否已经root，即是否获取root权限
protected static boolean haveRoot()
{

int i = execRootCmdSilent("echo test"); //通过执行测试命令来检测
if (i != -1)  return true;
retrun false;
}

}

这段代码直接在onCreate（）` 里面直接调用即可。