Android app调用系统重启、关机、获取root权限

/**
* 执行命令
*
* @param command 1、获取root权限 "chmod 777 "+getPackageCodePath()
*                2、关机 reboot -p
*                3、重启 reboot
*/
public static boolean execCmd(String command) {
Process process = null;
DataOutputStream os = null;
try {
process = Runtime.getRuntime().exec("su");
os = new DataOutputStream(process.getOutputStream());
os.writeBytes(command + "\n");
os.writeBytes("exit\n");
os.flush();
process.waitFor();
} catch (Exception e) {
return false;
} finally {
try {
if (os != null) {
os.close();
}
if (process != null) {
process.destroy();
}
} catch (Exception e) {
e.printStackTrace();
}
}
return true;
}