获取文件的所有列表中的文件夹及其与扩展子文件夹 [英] Get a List of All the Files in a Folder and Its Subfolders with extension

问题描述

我真的试图文件的获取列表中的文件夹及其扩展名为.MP3子文件夹，但功能只适用于根目录文件夹返回.mp3文件。

I`m trying get list of files in folder and its subfolders with extension ".mp3" , but the function return .mp3 files only in root folder.

我真的需要一个结构，这个样子的。

I`m need a structure look like this

http://s1.ipicture.ru/uploads/20130530/Kiju7Bf7.png
该人士$ ​​C $ C：

http://s1.ipicture.ru/uploads/20130530/Kiju7Bf7.png The source code:

private ListView lvFolders;
private File file;
private List<String> myList;

@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
        Bundle savedInstanceState) {

    View v = inflater.inflate(R.layout.folder, null);
    lvFolders = (ListView) v.findViewById(R.id.lvFolders);

    myList = new ArrayList<String>();

    String root_sd = Environment.getExternalStorageDirectory().toString();
    file = new File(root_sd);
    addToSongs(file);

    /*File list[] = file.listFiles();
    for (int i = 0; i < list.length; i++) {
        myList.add(list[i].getName());
    }*/

    lvFolders.setAdapter(new ArrayAdapter<String>(getActivity(),
            android.R.layout.simple_list_item_1, myList));

    lvFolders.setOnItemClickListener(new OnItemClickListener() {

        @Override
        public void onItemClick(AdapterView<?> arg0, View arg1,
                int position, long arg3) {
            File temp_file = new File(file, myList.get(position));

            if (!temp_file.isFile()) {
                file = new File(file, myList.get(position));
                File list[] = file.listFiles();

                myList.clear();

                for (int i = 0; i < list.length; i++) {
                    myList.add(list[i].getName());
                }
                Toast.makeText(getActivity(), file.toString(),
                        Toast.LENGTH_LONG).show();
                lvFolders.setAdapter(new ArrayAdapter<String>(
                        getActivity(), android.R.layout.simple_list_item_1,
                        myList));
            }
        }
    });

    return v;

}

FilenameFilter textFilter = new FilenameFilter() {
    public boolean accept(File dir, String name) {
        return (name.endsWith(".mp3"));
    }
};

private void addToSongs(File home) {
    for (File file : home.listFiles(textFilter)) {
        if (file.isDirectory()) {
            addToSongs(file);
        } else {
            myList.add(file.getAbsolutePath());
        }
    }
}

我在做什么错了？

What i'm doing wrong?

推荐答案

这code可以帮助：

public static void main(String[] args) 
{
    File file = new File("C:/MyDirectory");
    List<File> list = new ArrayList<File>();
    getMp3Files(file, list);
    // Use list which contains the files with .mp3 extension
}

public static void getMp3Files(File rootfile, List<File> list)
{       
    File[] files; 
    if(rootFile.isDirectory())
    {   
        files = rootfile.listFiles();
    }
    else
        return;
    for (File file : files)
    {
        if(file.isDirectory())
        {
            getMp3Files(file, list);
        }
        else
        {
            if(file.getName().endsWith(".mp3"))
            {
                list.add(file);
            }
        }
    }

}

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