How to play mp3 files from internal and external SD card in android?

Question

I am working on a mp3 player app, which plays .mp3 files present anywhere inside an internal SD card.

I have used the following codes to fetch the .mp3 files present in

Answer 1

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

    enter code here

import android.os.Environment;

public class SongsManager {


    final String MEDIA_PATH = Environment.getExternalStorageDirectory()``
            .getPath() + "/";
    private ArrayList> songsList = new ArrayList>();
    private String mp3Pattern = ".mp3";
    // Constructor
    public SongsManager(){

    }

    /**
     * Function to read all mp3 files from sdcard
     * and store the details in ArrayList
     * */
    public ArrayList> getPlayList(){
         System.out.println(MEDIA_PATH);
            if (MEDIA_PATH != null) {
                File home = new File(MEDIA_PATH);
                File[] listFiles = home.listFiles();
                if (listFiles != null && listFiles.length > 0) {
                    for (File file : listFiles) {
                        System.out.println(file.getAbsolutePath());
                        if (file.isDirectory()) {
                            scanDirectory(file);
                        } else {
                            addSongToList(file);
                        }
                    }
                }
            }
            // return songs list array
            return songsList;
        }

        private void scanDirectory(File directory) {
            if (directory != null) {
                File[] listFiles = directory.listFiles();
                if (listFiles != null && listFiles.length > 0) {
                    for (File file : listFiles) {
                        if (file.isDirectory()) {
                            scanDirectory(file);
                        } else {
                            addSongToList(file);
                        }

                    }
                }
            }
        }

        private void addSongToList(File song) {
            if (song.getName().endsWith(mp3Pattern)) {
                HashMap songMap = new HashMap();
                songMap.put("songTitle",
                        song.getName().substring(0, (song.getName().length() - 4)));
                songMap.put("songPath", song.getPath());

                // Adding each song to SongList
                songsList.add(songMap);
            }
        }
    /**
     * 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"));
        }
    }
}