问音乐播放器将只列出来自"/sdcard“的音乐

EN

package com.ascendapps.nexplay;

import java.io.File;
import java.io.FilenameFilter;
import java.util.ArrayList;
import java.util.HashMap;

import android.os.Environment;

public class SongsManager {
    // SDCard Path
    final String MEDIA_PATH = ("/sdcard");
    private ArrayList<HashMap<String, String>> songsList = new ArrayList<HashMap<String, String>>();

    // Constructor
    public 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())!=null && home.listFiles(new FileExtensionFilter()).length > 0)
        {
            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;
    }

    /*
     * The following class filters all files that have an extension of .mp3||.MP3
     */
    class FileExtensionFilter implements FilenameFilter {
        public boolean accept(File dir, String name) {
            return (name.endsWith(".mp3") || name.endsWith(".MP3"));
        }
    }
}