Android下擷取乙太網路mac地址方法 非wifi

 public static String loadFileAsString(String filePath) throws java.io.IOException{
        StringBuffer fileData = new StringBuffer(1000);
        BufferedReader reader = new BufferedReader(new FileReader(filePath));
        char[] buf = new char[1024];
        int numRead=0;
        while((numRead=reader.read(buf)) != -1){
            String readData = String.valueOf(buf, 0, numRead);
            fileData.append(readData);
        }
        reader.close();
        return fileData.toString();
    }

    /*
    * Get the STB MacAddress
    */
    public static String getMacAddress(){
        try {
            return loadFileAsString("/sys/class/net/eth0/address")
                .toUpperCase().substring(0, 17);
        } catch (IOException e) {
            e.printStackTrace();
            return null;
        }
    }