获取本地音乐文件的专辑，图片，音乐信息

今天跟大家分享一下如何获取本地音乐文件中的各种音乐信息，包括音乐的歌名，歌手，曲长，专辑，专辑图片

private String tilte;//歌名
private String artist;//歌手
private Bitmap bitmap;//专辑海报
private long duration;//时长
private String path_music;//当前播放的歌曲路径

ContentResolver musicResolver = getContentResolver();
Cursor cursor = null;

cursor = musicResolver.query(
        MediaStore.Audio.Media.EXTERNAL_CONTENT_URI, null, MediaStore.Audio.Media.DATA + "= ? ",
        new String[]{path_music}, null);


if (cursor != null && cursor.getCount() > 0) {
    cursor.moveToFirst();

    long ID = cursor.getLong(cursor
            .getColumnIndex(MediaStore.Audio.Media._ID));    //音乐id
    tilte = cursor.getString(cursor.getColumnIndexOrThrow(MediaStore.Audio.Media.TITLE));
    artist = cursor.getString(cursor
            .getColumnIndex(MediaStore.Audio.Media.ARTIST)); // 艺术家
    String album = cursor.getString(cursor
            .getColumnIndex(MediaStore.Audio.Media.ALBUM));    //专辑
    duration = cursor.getLong(cursor
            .getColumnIndex(MediaStore.Audio.Media.DURATION)); // 时长
                long size = cursor.getLong(cursor
                        .getColumnIndex(MediaStore.Audio.Media.SIZE));
                String url = cursor.getString(cursor
                        .getColumnIndex(MediaStore.Audio.Media.DATA));

    long albumId = cursor.getInt(cursor.getColumnIndex(MediaStore.Audio.Media.ALBUM_ID));


    bitmap = getMusicBitemp(getApplicationContext(), ID, albumId);

下面还有getMusicBitmap方法

 private static final Uri sArtworkUri = Uri
            .parse("content://media/external/audio/albumart");

    public static Bitmap getMusicBitemp(Context context, long songid,
                                        long albumid) {
        Bitmap bm = null;
// 专辑id和歌曲id小于0说明没有专辑、歌曲，并抛出异常
        if (albumid < 0 && songid < 0) {
            throw new IllegalArgumentException(
                    "Must specify an album or a song id");
        }
        try {
            if (albumid < 0) {
                Uri uri = Uri.parse("content://media/external/audio/media/"
                        + songid + "/albumart");
                ParcelFileDescriptor pfd = context.getContentResolver()
                        .openFileDescriptor(uri, "r");
                if (pfd != null) {
                    FileDescriptor fd = pfd.getFileDescriptor();
                    bm = BitmapFactory.decodeFileDescriptor(fd);
                }
            } else {
                Uri uri = ContentUris.withAppendedId(sArtworkUri, albumid);
                ParcelFileDescriptor pfd = context.getContentResolver()
                        .openFileDescriptor(uri, "r");
                if (pfd != null) {
                    FileDescriptor fd = pfd.getFileDescriptor();
                    bm = BitmapFactory.decodeFileDescriptor(fd);


                } else {
                    return null;
                }
            }
        } catch (FileNotFoundException ex) {
        }
//如果获取的bitmap为空，则返回一个默认的bitmap
        if (bm == null) {
            Resources resources = context.getResources();
            Drawable drawable = resources.getDrawable(R.drawable.back_iv);
             //Drawable 转 Bitmap
            BitmapDrawable bitmapDrawable = (BitmapDrawable) drawable;
            bm = bitmapDrawable.getBitmap();
        }

        return Bitmap.createScaledBitmap(bm, 150, 150, true);
    }

除去上面使用到的 还有

String year = cursor.getString(cursor.getColumnIndexOrThrow(MediaStore.Audio.Media.YEAR));//获取发行年份

Int size = cursor.getLong(cursor.getColumnIndexOrThrow(MediaStore.Audio.Media.SIZE));//获取歌曲文件大小

等等。