Question

也无法检索我使用的相册ID：

String SONG_ALBUMID  = MediaStore.Audio.Albums.ALBUM_ID;

但是MediaStore.Audio.Albums.ALBUM_ID和MediaStore.Audio.Media.ALBUM_ID有什么区别

谢谢

Answer 1

MediaStore.Audio.Albums.ALBUM_ID是专辑表中的专辑ID， MediaStore.Audio.Media.ALBUM_ID将是文件表中的“外键” album_id。一般而言，关系数据库的设计使得访问文件表时，我们需要的是abum_id来访问唱片集表并检索所有相关唱片集信息，例如album_title。android数据库中的表格文件包含许多详细信息例如

_id INTEGER
_data   TEXT
_size   INTEGER
format  INTEGER
parent  INTEGER
date_added  INTEGER
date_modified   INTEGER
mime_type   TEXT
title   TEXT
description TEXT
_display_name   TEXT
picasa_id   TEXT
orientation INTEGER
latitude    DOUBLE
longitude   DOUBLE
datetaken   INTEGER
mini_thumb_magic    INTEGER
bucket_id   TEXT
bucket_display_name TEXT
isprivate   INTEGER
title_key   TEXT
artist_id   INTEGER
album_id    INTEGER
composer    TEXT
track   INTEGER
year    INTEGER
is_ringtone INTEGER
is_music    INTEGER
is_alarm    INTEGER
is_notification INTEGER
is_podcast  INTEGER
album_artist    TEXT
duration    INTEGER
bookmark    INTEGER
artist  TEXT
album   TEXT
resolution  TEXT
tags    TEXT
category    TEXT
language    TEXT
mini_thumb_data TEXT
name    TEXT
media_type  INTEGER
old_id  INTEGER
storage_id  INTEGER
is_drm  INTEGER
width   INTEGER
height  INTEGER

Answer 2

有2种方法：（在您的resolver.query中包括请求的列）

     public String getalbum_id(Cursor pcursor) {
    int album_col = pcursor
            .getColumnIndexOrThrow(MediaStore.Audio.Media.ALBUM_ID);
    String album_id = pcursor.getString(album_col);

    if (album_id.length() > 0) {
        return album_id;
    } else {
        return "";
    }
}

public String getAlbumIdfromPath(Context context, String datapath) {
    ContentResolver cr = context.getContentResolver();
    final String _id = MediaStore.Audio.Media._ID;
    final String path = MediaStore.Audio.Media.DATA;
    final String album_id = MediaStore.Audio.Media.ALBUM_ID;
    final String[] columns = {_id, album_id};
    final String[] trackpath = {"%" + datapath + "%"};
    String where = path + " LIKE ?";
    String stralbum_id = null;
    Cursor crs = cr.query(uri, columns, where, trackpath, null);
    if (crs != null && crs.moveToFirst()) {
        stralbum_id = crs.getString(crs.getColumnIndexOrThrow(album_id));
        crs.close();
    }
    return stralbum_id;
}

现在要显示，我以前发布过，但是我使用Gilde库。它完成了所有艰苦的工作。

            //  loading album cover using Glide library
        String artist_id = (c.getString(c
                .getColumnIndex(MediaStore.Audio.Artists._ID)));
        Cursor albs = albums.getArtistsAlbumcursor(mContext, artist_id);
        String stralbumId=null;
        if(albs!=null && albs.moveToFirst()){
           stralbumId= albs.getString(albs.getColumnIndexOrThrow(MediaStore.Audio.Media.ALBUM_ID));
        }
        Uri ImageUrl = plist.getAlbumUri(mContext, stralbumId);
        if (ImageUrl != null) {
            Glide.with(mContext)
                    .asBitmap()
                    .load(ImageUrl)
                    .into(image);
        }
    }

getAlbumuri在哪里：

     public Uri getAlbumUri(Context mContext,String album_id){
    if(mContext!=null) {
        Uri sArtworkUri = Uri.parse("content://media/external/audio/albumart");
        Uri imageUri = Uri.withAppendedPath(sArtworkUri, String.valueOf(album_id));
        return imageUri;
    }
    return null;
}

在模块build.gradle中添加以下内容

    implementation 'com.github.bumptech.glide:glide:4.5.0'
annotationProcessor 'com.github.bumptech.glide:compiler:4.7.1'

   private final Uri uri = MediaStore.Audio.Media.EXTERNAL_CONTENT_URI;

媒体商店专辑和媒体专栏

2 个答案: