Calculate File Size in KB or MB

fun Uri.calculateFileSizeInMB(context: Context): String? {
    val cursor: Cursor? = context.contentResolver.query(this, null, null, null, null)
    if (cursor != null) {
        cursor.moveToFirst()
        val sizeIndex: Int = cursor.getColumnIndex(OpenableColumns.SIZE)
        val imageSize: Float = cursor.getLong(sizeIndex).toFloat()
        cursor.close()

        if (imageSize < 1024) {
            context.contentResolver.openInputStream(this)?.let {
                return it.readBytes().size.convertToReadableLength()
            }
            return null
        }

        return imageSize.convertToReadableLength()
    }
    return null
}

fun Float.convertToReadableLength(): String {
    val fileSizeInKB = this / 1024f
    val fileSizeInMB = fileSizeInKB / 1024f

    return if (fileSizeInMB > 1)
        String.format("%.2f MB", fileSizeInMB)
    else
        String.format("%.2f KB", fileSizeInKB)
}

fun Int.convertToReadableLength(): String {
    return this.toFloat().convertToReadableLength()
}