列出android中的所有Mp3文件

概述我正在开发Android中的音乐播放器,但仍然在阅读MP3文件.这是我读取所有mp3文件的代码.但它不会从设备中撤回任何文件(尽管我使用adb复制了一些文件).我也希望它使用相册,艺术家等列出请帮助.finalStringMEDIA_PATH=Environment.getExternalStorageDirectory()+"";private

我正在开发Android中的音乐播放器,但仍然在阅读MP3文件.
这是我读取所有mp3文件的代码.但它不会从设备中撤回任何文件(尽管我使用adb复制了一些文件).我也希望它使用相册,艺术家等列出请帮助.

final String MEDIA_PATH = Environment.getExternalStorageDirectory()+"";private ArrayList<HashMap<String, String>> songsList = new ArrayList<HashMap<String, String>>();// Constructorpublic SongsManager(){}/** * Function to read all mp3 files from sdcard * and store the details in ArrayList * */public ArrayList<HashMap<String, String>> getPlayList(){    file home = new file(MEDIA_PATH);    //if (home.Listfiles(new fileExtensionFilter()).length > 0) {    if (home.Listfiles(new fileExtensionFilter())!=null) {        for (file file : home.Listfiles(new fileExtensionFilter())) {            HashMap<String, String> song = new HashMap<String, String>();            song.put("songTitle", file.getname().substring(0, (file.getname().length() - 4)));            song.put("songPath", file.getPath());            // Adding each song to SongList            songsList.add(song);        }    }    // return songs List array    return songsList;}/** * Class to filter files which are having .mp3 extension * */class fileExtensionFilter implements filenameFilter {    public boolean accept(file dir, String name) {        return (name.endsWith(".mp3") || name.endsWith(".MP3"));    }}

解决方法:

在这里我修改了你的getPlayList()方法.了解更多.

ArrayList<HashMap<String,String>> getPlayList(String rootPath) {            ArrayList<HashMap<String,String>> fileList = new ArrayList<>();            try {                file rootFolder = new file(rootPath);                file[] files = rootFolder.Listfiles(); //here you will get NPE if directory doesn't contains  any file,handle it like this.                for (file file : files) {                    if (file.isDirectory()) {                        if (getPlayList(file.getabsolutePath()) != null) {                            fileList.addAll(getPlayList(file.getabsolutePath()));                        } else {                            break;                        }                    } else if (file.getname().endsWith(".mp3")) {                        HashMap<String, String> song = new HashMap<>();                        song.put("file_path", file.getabsolutePath());                        song.put("file_name", file.getname());                        fileList.add(song);                    }                }                return fileList;            } catch (Exception e) {                return null;            }        }

你可以得到这样的歌曲名称和歌曲路径：

@OverrIDeprotected voID onCreate(Bundle savedInstanceState) {super.onCreate(savedInstanceState);setContentVIEw(R.layout.main_activity);ArrayList<HashMap<String,String>> songList=getPlayList("/storage/sdcard1/");        if(songList!=null){        for(int i=0;i<songList.size();i++){        String filename=songList.get(i).get("file_name");        String filePath=songList.get(i).get("file_path");        //here you will get List of file name and file path that present in your device        log.e("file details "," name ="+filename +" path = "+filePath);        }        }    }

Note: use “/storage/sdcard1/” for reading files from sdCard and use Environment.getExternalStorageDirectory().getabsolutePath() for reading files from phone memory

希望这会帮助你.

总结

以上是内存溢出为你收集整理的列出android中的所有Mp3文件全部内容，希望文章能够帮你解决列出android中的所有Mp3文件所遇到的程序开发问题。

如果觉得内存溢出网站内容还不错，欢迎将内存溢出网站推荐给程序员好友。