將音樂文件刪除，重新運(yùn)行后，查詢List還顯示刪除的音樂文件

List<Music> list=new ArrayList<>();
        //查詢媒體數(shù)據(jù)庫(kù)
        Cursor cursor=getContentResolver().query(MediaStore.Audio.Media.EXTERNAL_CONTENT_URI,null,
                null,null ,MediaStore.Audio.Media.DEFAULT_SORT_ORDER);
        //遍歷數(shù)據(jù)庫(kù)
        if (cursor.moveToFirst()){
            while (!cursor.isAfterLast()) {
                // 歌曲編號(hào)
                int id = cursor.getInt(cursor.getColumnIndexOrThrow(MediaStore.Audio.Media._ID));
                // 歌曲id
                int trackId = cursor.getInt(cursor.getColumnIndexOrThrow(MediaStore.Audio.Media.ALBUM_ID));
                // 歌曲標(biāo)題
                String title = cursor.getString(cursor.getColumnIndexOrThrow(MediaStore.Audio.Media.TITLE));
                // 歌曲的專輯名：MediaStore.Audio.Media.ALBUM
                String album = cursor.getString(cursor.getColumnIndexOrThrow(MediaStore.Audio.Media.ALBUM));
                // 歌曲的歌手名： MediaStore.Audio.Media.ARTIST
                String artist = cursor.getString(cursor.getColumnIndexOrThrow(MediaStore.Audio.Media.ARTIST));
                // 歌曲文件的路徑 ：MediaStore.Audio.Media.DATA
                String url = cursor.getString(cursor.getColumnIndexOrThrow(MediaStore.Audio.Media.DATA));
                // 歌曲的總播放時(shí)長(zhǎng)：MediaStore.Audio.Media.DURATION
                int duration = cursor.getInt(cursor.getColumnIndexOrThrow(MediaStore.Audio.Media.DURATION));
                // 歌曲文件的大小 ：MediaStore.Audio.Media.SIZE
                Long size = cursor.getLong(cursor.getColumnIndexOrThrow(MediaStore.Audio.Media.SIZE));
                // 歌曲文件顯示名字
                String disName = cursor.getString(cursor.getColumnIndexOrThrow(
                        MediaStore.Audio.Media.DISPLAY_NAME));
                // 是否為音樂
                int isMusic = cursor.getInt(cursor.getColumnIndex(MediaStore.Audio.Media.IS_MUSIC));

                cursor.moveToNext();
                if (isMusic != 0) { // 只把音樂添加到集合當(dāng)中
                    Music music=new Music();
                    music.setTitle(title);
                    music.setArtist(artist);
                    music.setUrl(url);
                    music.setDuration(duration);
                    music.setSize(size);
                    music.setDisName(disName);

                    list.add(music);
                }
            }
            Log.d("url","Service_list="+list);
        }
        cursor.close();