我知道的：这才是你想要的纯文档扫描功能

本文链接：https://blog.csdn.net/jack_bear_csdn/article/details/92156417

一个纯文档扫描功能，目前可扫描到系统中的所有"doc", “ppt”, “xls”, “pdf”, “docx”, “pptx”, “xlsx”, “txt”, “rar”, "zip"文档，可自由过滤类型，只扫描出文档数据，界面由你定制。使用步骤如下：

需要的相关权限：

<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE"></uses-permission>
    <uses-permission android:name="android.permission.READ_EXTERNAL_STORAGE"></uses-permission>

1.添加jar包

将下载的jar包放到你项目libs目录下并作为依赖库使用，jar包下载地址
在这里插入图片描述

2.声明你要扫描的文档类型

 private String[] fileTypeArray = new String[]{"doc", "ppt", "xls", "pdf", "docx", "pptx",
            "xlsx", "txt", "rar", "zip"};

3.实例化扫描器，根据文档类型获取对应的mimeType并在工作线程中开启扫描

private FilesFacade.MimeType mMimeType;
//扫描器实例
FilesFacade filesFacade = FilesFacade.getInstance(getActivity());
        mMimeType = filesFacade.mimeType();
        //多线程扫描各类型的文档
        for (String fileType : fileTypeArray) {
            MimeTypeMap mimeTypeMap = MimeTypeMap.getSingleton();
            String mimeType = mimeTypeMap.getMimeTypeFromExtension(fileType);
            Logger.d("文件mime类型：" + mimeType);
            if (EmptyUtils.isNotEmpty(mimeType)) {
                loadLocalFiles(fileType, mimeType);
            }
        }

3.扫描逻辑代码loadLocalFiles函数

private void loadLocalFiles(String fileType, String mimetype) {
        ThreadPoolManager.getLongPool().execute(new Runnable() {
            @Override
            public void run() {
                FilesCursor filesCursor = mMimeType.fetch(new String[]{mimetype});
                int pathIndex = filesCursor.getColumnIndexOrThrow
                        (MediaStore.Files.FileColumns.DATA);
                int titleIndex = filesCursor.getColumnIndexOrThrow
                        (MediaStore.Files.FileColumns.TITLE);
                int sizeIndex = filesCursor.getColumnIndexOrThrow
                        (MediaStore.Files.FileColumns.SIZE);
                int addedIndex = filesCursor.getColumnIndexOrThrow
                        (MediaStore.Files.FileColumns.DATE_ADDED);
                List<FileChosenBean> files = new ArrayList<>();
                filesCursor.moveToFirst();
                while (filesCursor.moveToNext()) {
                    String fileName = filesCursor.getString(titleIndex);
                    Logger.d("文件标题：" + fileName);
                    String filePath = filesCursor.getString(pathIndex);
                    Logger.d("文件路径：" + filePath);
                    String fileSize = filesCursor.getString(sizeIndex);
                    Logger.d("文件大小：" + fileSize);
                    String addTime = filesCursor.getString(addedIndex);
                    Logger.d("文件添加时间：" + addTime);
                    FileChosenBean fileChosenBean = new FileChosenBean();
                    //构造文件后缀名
                    if (EmptyUtils.isNotEmpty(filePath) && filePath.contains(".")) {
                        String[] split = filePath.split("\\.");
                        if (split.length > 1) {
                            fileName = fileName + "." + split[split.length - 1];
                        }
                    }
                    fileChosenBean.addTime = addTime;
                    fileChosenBean.name = fileName;
                    fileChosenBean.path = filePath;
                    fileChosenBean.type = fileType;
                    fileChosenBean.size = fileSize;

                    files.add(fileChosenBean);
                }
                filesCursor.close();
                //TODO 将扫描到的该类型的文档files发送到UI线程显示
            }
        });
    }

4.FileChosenBean实体

public class FileChosenBean {
    public boolean ischecked;
    public String type;
    public String name;
    public String path;
    public String size;
    public String addTime;
}