如何在SDCard上找到所有音频文件(eclipse,android)

Question

我已经有了这个代码......但是我想通过子文件夹搜索而不是仅仅通过sdcard.sorry搜索我的英文;)感谢您的帮助,vinzenz

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

// Constructor
public SongsManager(){
    **strong text**
 }

/**
 * 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) {
        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;
}

}

Answer 1

此代码可能对您有所帮助.它搜索SD卡中的歌曲(甚至在子文件夹中)并存储细节songsList.

ArrayList<HashMap<String, String>> songsList = new ArrayList<HashMap<String, String>>();
    String[] STAR = { "*" };

    Cursor cursor;
    Uri uri = MediaStore.Audio.Media.EXTERNAL_CONTENT_URI;
    String selection = MediaStore.Audio.Media.IS_MUSIC + " != 0";


    cursor = managedQuery(uri, STAR, selection, null, null);

    if (cursor != null) {
        if (cursor.moveToFirst()) {
            do {
                String songName = cursor
                        .getString(cursor
                                .getColumnIndex(MediaStore.Audio.Media.DISPLAY_NAME));


                String path = cursor.getString(cursor
                        .getColumnIndex(MediaStore.Audio.Media.DATA));


                String albumName = cursor.getString(cursor
                        .getColumnIndex(MediaStore.Audio.Media.ALBUM));
                int albumId = cursor
                        .getInt(cursor
                                .getColumnIndex(MediaStore.Audio.Media.ALBUM_ID));

                HashMap<String, String> song = new HashMap<String, String>();
                song.put("songTitle",albumName+" "+songName+"___"+albumId);
                song.put("songPath",path );
                songsList.add(song);

            } while (cursor.moveToNext());


        }

    }