Base64

• Handle Image Bitmap

// Bitmap → Base64 string
fun bitmapToBase64(bitmap: Bitmap): String {
    val stream = ByteArrayOutputStream()
    bitmap.compress(Bitmap.CompressFormat.PNG, 100, stream)
    return Base64.encodeToString(stream.toByteArray(), Base64.DEFAULT)
}

// Base64 string → Bitmap
fun base64ToBitmap(base64: String): Bitmap {
    val bytes = Base64.decode(base64, Base64.DEFAULT)
    return BitmapFactory.decodeByteArray(bytes, 0, bytes.size)
}