扫描子网获取IP地址，使用Android获取Mac地址和SSID

Question

我正在使用本地网络扫描仪。今天我用这个获取所有的ip和mac地址：

@Override
    protected List<Camera> doInBackground(String... params) {
        for (int i = 0; i < 255 && !isCancelled(); i++) {
            String ip = params[0] + String.valueOf(i);
            try {
                Runtime.getRuntime().exec("ping -b " + ip);
            } catch (IOException e) {
                if (Constants.ENABLE_LOGS) {
                    e.printStackTrace();
                }
                Log.e(getClass().getName(), e.getMessage());
            }
        }
        return searchCameras();
    }

 private List<Camera> searchCameras() {
        List<Camera> cams = new ArrayList<>();
        try {
            BufferedReader br = new BufferedReader(new FileReader("/proc/net/arp"));
            String line = "";
            int cameraCompleted = 0, cameraPosition = -1;
            while ((line = br.readLine()) != null /*|| cameraCompleted < mLanCamList.size()*/) {
                String[] tokens = line.split("\\s+");
                String CAM_MAC = "ec:ba:fe";
                if (tokens.length >= 4 && tokens[3].startsWith(CAM_MAC)) {
                    if (cameraPosition != -1) {
                        mLanCamList.get(cameraPosition).setIp(tokens[0]);
                        cameraCompleted+=1;
                    }
                }
            }
            br.close();
        } catch (Exception e) {
            Log.e(TAG, e.toString());
        }
        return cams;
    }

如您所见，所有项目都缺少IP地址。我尝试过InetAddress，但它只返回相同的IP。