从android上的外部存储中获取所有.pdf文件

Question

I'm trying to get all pdf's recursively from the External storage. What I'd like to have, is an interface just like pdf reader's, meaning, that it loads the files asynchronously and displays each directory name in a separator. I've got the separator part down, but now I need the loading.

Any tips on doing this? I know that I should just iterate through all files, check if the files is a directory and launch the recursive algorithm again, but how to write this to only show .pdf files?

Answer 1

private static void searchFolderRecursive1(File folder) {
    if (folder != null) {
        if (folder.listFiles() != null) {
            for (File file : folder.listFiles()) {
                if (file.isFile()) {
                    if(file.getName().contains(".pdf")){
                        Log.v("ooo", "path__="+file.getName());
                    }
                } else {
                    searchFolderRecursive1(file);
                }
            }
        }
    }
}

Answer 2

尝试将ContentResolver与Cursor和MediaStore.Files.FileColumns.MIME_TYPE一起用作“pdf”。

Answer 3

I know that I should just iterate through all files, check if the files is a directory and launch the recursive algorithm again, but how to write this to only show .pdf files?

Look at the file name and see if it ends in .pdf , possibly using a FilenameFilter , as shown here .