如何从 Android 的外部存储中加载所有音乐文件？

Question

I'm trying to read all songs from external storage using contentResolver?.query(), but every time I run app my query is empty. It just goes from if(resultSet.moveToFirst()) to resultSet?.close(). Here is my code and debug screen below:

override fun onCreateView(
    inflater: LayoutInflater, container: ViewGroup?,
    savedInstanceState: Bundle?
): View? {
    // Inflate the layout for this fragment
    val view =  inflater.inflate(R.layout.fragment_tracks_tab, container, false)

    permissionSetup()


    val uri = MediaStore.Audio.Media.EXTERNAL_CONTENT_URI
    val selection = MediaStore.Audio.Media.IS_MUSIC + " != 0"
    val projection = arrayOf<String>(
        MediaStore.Audio.AudioColumns._ID,
        MediaStore.Audio.AudioColumns.TITLE,
        MediaStore.Audio.ArtistColumns.ARTIST
    )


    val resultSet : Cursor? = activity?.applicationContext?.contentResolver?.query(uri, projection, selection, null, null)
    if (resultSet != null) {
        if(resultSet.moveToFirst()) {
            do {
                val url = resultSet.getString(0)
                val artist = resultSet.getString(1)
                val title = resultSet.getString(2)

                listSong.add(SongInfo(title, artist, url))
            } while (resultSet.moveToNext())
        }
    }
    resultSet?.close()

enter image description here

If it's important I'm writing in a tabFragment and my emulator device is Pixel 4XL with Android 11.0 API 30. Please, help me, I already tried everything I can find.

Answer 1

Use this simple library! I've tested it with Android 11 works totally fine!!!

https://github.com/CodeBoy722/MediaFacer