//let the fielExplorer get the right of System root
    public static boolean upgradeRootPermission(String pkgCodePath){
        Process process=null;
        DataOutputStream os=null;
        
        try{
            String cmd="chmod 777 "+pkgCodePath;
            process =Runtime.getRuntime().exec("su");//transfer to root
            os=new DataOutputStream(process.getOutputStream());
            os.writeBytes(cmd + "\n");
            os.writeBytes("exit\n");
            os.flush();
            process.waitFor();
        }catch (Exception e){
            return false;
        }finally {
            try{if(os!=null){
                os.close();
                process.destroy();
            }
            }catch (Exception e){
                
            }
        }
        return true;
    }