I am using MediaStore to create files on Android, then I need to access them for reading. How can I do this?

Is there a way to query all my files, or filter them by application owner through ContentResolver somehow, or maybe I can mark my files at the creation time to filter them by this mark later?

My code:

val resolver: ContentResolver = /* Is passed as an argument */
val collection = if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.Q) {
    MediaStore.Audio.Media.getContentUri(MediaStore.VOLUME_EXTERNAL_PRIMARY)
} else MediaStore.Audio.Media.EXTERNAL_CONTENT_URI

fun createFile(): Uri? {
    val fileDetails = ContentValues().apply {
        put(MediaStore.Audio.Media.DISPLAY_NAME, "example.aac")
        if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.Q)
            put(MediaStore.Audio.Media.IS_PENDING, 1)
    }

    return resolver.insert(collection, fileDetails)
}

/* Between calling these two functions I also set `IS_PENDING` to 0 */

fun findRecordings(): List<MyFile> {
    val projection = arrayOf(
        MediaStore.Audio.Media._ID,
        /* ... */
    )
    val selection = /* Filter to only get the files created by my app */
    val selectionArgs = /* ... */
    val sortOrder = /* ... */

    val files = mutableListOf<MyFile>()

    resolver.query(collection, projection, selection, selectionArgs, sortOrder)?.use { cursor ->
        val idColumn = cursor.getColumnIndexOrThrow(MediaStore.Audio.Media._ID)
        /* Other columns */

        while (cursor.moveToNext()) {
            val id = cursor.getLong(idColumn)
            /* Other data */

            val uri = ContentUris.withAppendedId(collection, id)

            files  = MyFile(uri, /* ... */)
        }
    }

    return files
}

CodePudding user response：

The solution was to create a subfolder and save my files there. For that I used MediaStore.Audio.Media.RELATIVE_PATH on >= Build.VERSION_CODES.Q and MediaStore.Audio.Media.DATA on other version of Android.