想要列出内部存储和外部存储上的所有音乐文件，但在 Android 10 上无法完成

Question

I am trying to access and list out all the music file on android Q or 10. I can do it with cursor and adding this projection

private static final String[] EXTERNAL_COLUMNS = new String[]{
            MediaStore.Audio.Media._ID,
            MediaStore.Audio.Media.DATA,
            MediaStore.Audio.Media.TITLE,
            MediaStore.Audio.Media.ARTIST,
            MediaStore.Audio.Media.ALBUM,
            MediaStore.Audio.Media.IS_RINGTONE,
            MediaStore.Audio.Media.IS_ALARM,
            MediaStore.Audio.Media.IS_NOTIFICATION,
            MediaStore.Audio.Media.IS_MUSIC,
            "\"" + MediaStore.Audio.Media.EXTERNAL_CONTENT_URI + "\""
    };

but it is working upto api level 28. On android 10 it is showing Caused by: java.lang.IllegalArgumentException: Invalid column "content://media/external/audio/media" .

I am adding this projection in cursorLoader. I know there are some behavioral changes in Android 10 api level, but this thing is really freaking me out. Can anyone help me in that. Thanks in advance.

Answer 1

用MediaStore.Audio.AudioColumns替换MediaStore.Audio.Media

Answer 2

I only use:-

 private static final String[] EXTERNAL_COLUMNS = new String[]{
            MediaStore.Audio.Media._ID,

    };

as column, and pass null as projection.

then create uri for each file by

Uri uri=ContentUris.withAppendedId(MediaStore.Images.Media.EXTERNAL_CONTENT_URI, id)

after that i list all the uri, and get all other data of file through java. It works, thanks @commonsWare. It looks difficult, but it is far easy, just give it a try!

I am adding image fetch code for the reference

fun getAllDataPath(activity: Activity): MutableList<Uri> {
    val uriExternal: Uri = MediaStore.Images.Media.EXTERNAL_CONTENT_URI
    val cursor: Cursor?
    val columnIndexID: Int
    val listOfAllImages: MutableList<Uri> = mutableListOf()
    val projection = arrayOf(MediaStore.Images.Media._ID)
    var imageId: Long
    cursor = activity.contentResolver.query(uriExternal, projection, null, null, null)
    if (cursor != null) {
        columnIndexID = cursor.getColumnIndexOrThrow(MediaStore.Images.Media._ID)
        while (cursor.moveToNext()) {
            imageId = cursor.getLong(columnIndexID)
            val uriImage = Uri.withAppendedPath(uriExternal, "" + imageId)
            listOfAllImages.add(uriImage)
        }
        cursor.close()
    }
    return listOfAllImages
}

Please convert images to music and use it for your reference.

thanks