如何获取Usb连接设备的空间信息

Question

我有一个Android安装盒，其中2gb内存可用，8 gb外部可用内存，设备有插槽用于连接USB设备。我想获得连接的USB设备的内存信息。假设我连接了多个USB设备。我正在使用广播接收器获得连接断开连接事件。但如果我想得到我无法得到的记忆信息。我只能获得内置的外部存储信息请指导我。

我对android开发很新。我试过这种方式

 private void sizeInfo(){
    File path = Environment.getDataDirectory();
    StatFs stat2 = new StatFs(path.getPath());
    long blockSize = stat2.getBlockSize();
    long availableBlocks = stat2.getAvailableBlocks();
    String format =  Formatter.formatFileSize(this, availableBlocks * blockSize);
  //  Log.d("space","Path : "+ path +"\n");
    Log.d("space","Available Space in GB : "+ format);
    String str = Environment.getExternalStorageState();
    //Log.d("Checking","Media "+Environment.isExternalStorageEmulated());
}

我按照

获取附加设备列表

    private void updateDeviceList() {
    Log.d("Checking","updateDeviceList function");
    int DivCount =0;
    HashMap<String, UsbDevice> connectedDevices = mUsbManager.getDeviceList();
    if (connectedDevices.isEmpty()) {
        usbDevice = null;
        Log.d("Checking", "No Currently Device Conneted");

    } else {
        for (UsbDevice device : connectedDevices.values()) {
                DivCount++;
                Log.d("Device Info","DeviceId " +device.getDeviceId()+"\n");
                Log.d("Device Info","ProductId "+device.getProductId()+"\n");
                Log.d("Device Info","DeviceName "+device.getDeviceName()+"\n");
                Log.d("Device Info","DeviceClass "+device.getDeviceClass());
                String str = Build.MANUFACTURER;
                Log.d("Device Info","Model "+str);
                usbDevice =device;
                sizeInfo();
        }
    }
}

我能够获得附加设备列表但无法获取可移动USB的内存信息