实现接入多个U盘，读取各个U盘图片，并按U盘名在recyclerView展示图片代码实现

以下是一个实现接入多个U盘，读取各个U盘图片，并按U盘名在recyclerView展示图片的代码示例：

private ArrayList<String> mUdiskPaths = new ArrayList<>();
private ArrayList<String> mImagePaths = new ArrayList<>();

private void initUdiskPaths() {
    File[] files = new File("/mnt/usb_storage/").listFiles();
    if (files != null) {
        for (File file : files) {
            if (file.isDirectory()) {
                mUdiskPaths.add(file.getAbsolutePath());
            }
        }
    }
}

private void readImagesFromUdisks() {
    for (String udiskPath : mUdiskPaths) {
        File[] files = new File(udiskPath).listFiles();
        if (files != null) {
            for (File file : files) {
                if (file.isFile() && file.getName().endsWith(".jpg")) {
                    mImagePaths.add(file.getAbsolutePath());
                }
            }
        }
    }
}

private void showImagesInRecyclerView() {
    RecyclerView recyclerView = findViewById(R.id.recyclerView);
    recyclerView.setLayoutManager(new GridLayoutManager(this, 3));
    recyclerView.setAdapter(new ImageAdapter(mImagePaths));
}

private class ImageAdapter extends RecyclerView.Adapter<ImageAdapter.ViewHolder> {
    private ArrayList<String> mImagePaths;

    public ImageAdapter(ArrayList<String> imagePaths) {
        mImagePaths = imagePaths;
    }

    @NonNull
    @Override
    public ViewHolder onCreateViewHolder(@NonNull ViewGroup parent, int viewType) {
        View view = LayoutInflater.from(parent.getContext()).inflate(R.layout.item_image, parent, false);
        return new ViewHolder(view);
    }

    @Override
    public void onBindViewHolder(@NonNull ViewHolder holder, int position) {
        String imagePath = mImagePaths.get(position);
        Glide.with(holder.itemView.getContext()).load(imagePath).into(holder.imageView);
    }

    @Override
    public int getItemCount() {
        return mImagePaths.size();
    }

    public class ViewHolder extends RecyclerView.ViewHolder {
        ImageView imageView;

        public ViewHolder(@NonNull View itemView) {
            super(itemView);
            imageView = itemView.findViewById(R.id.imageView);
        }
    }
}

在这个示例中，我们首先通过访问`/mnt/usb_storage/`目录来获取所有连接的U盘的路径，然后遍历每个U盘，读取其中所有的`.jpg`文件的路径，并将它们存储在一个`ArrayList`中。最后，我们使用`RecyclerView`来展示所有的图片，每个图片都使用`Glide`库来加载。