仅从内部存储中检索下载的歌曲以在Android Studio中制作MP3播放器

Question

This is my code. As you can see I retrieve the songs from the internal storage but in the MP3 player shows all the other "default" music the device has. Any help is appreciated.

public void getSongList() {

    ContentResolver musicResolver = getContentResolver();


    Uri musicUri = MediaStore.Audio.Media.INTERNAL_CONTENT_URI;

    Cursor musicCursor = musicResolver.query(musicUri, null, null, null, null);

    if (musicCursor!=null && musicCursor.moveToFirst()){
        //get columns
        int titleColumn = musicCursor.getColumnIndex(MediaStore.Audio.Media.TITLE);
        int idColumn = musicCursor.getColumnIndex(MediaStore.Audio.Media._ID);
        int artistColumn = musicCursor.getColumnIndex(MediaStore.Audio.Media.ARTIST);
        //add songs to list

        do {
            long thisId = musicCursor.getLong(idColumn);
            String thisTitle = musicCursor.getString(titleColumn);
            String thisArtist = musicCursor.getString(artistColumn);
            songList.add(new Song(thisId, thisTitle, thisArtist));
        }
        while (musicCursor.moveToNext());
    }
}

Answer 1

The javadoc for that constant says:

The content:// style URI for the internal storage.

So, basically you lookup all internally stored content.

What makes you think that would be limited to downloaded content?

In other words: I think your whole idea will simply not work this way; you simply ask "give me all media that is currently located in the internal storage".

Answer 2

将下载的歌曲存储在自己的目录中，并且仅从该特定目录加载？