Android Kotlin: Display image in bytecode

Question

I am building an app with Kotlin frontend/Python backend and I want to display an image that is in bytecode. My python script uses BytesIO() (https://docs.python.org/3/library/io.html#io.BytesIO) to return image's bytecode (ex. <_io.BytesIO object at 0x6f2496j0>) and I want to use kotlin to display its image.

Is this even possible? If so, how can I assign image values to imageView id for example? Sample code of it will be much appreciated.

Thank you.

Does this answer your question? Android: how to convert byte array to Bitmap? — Lalit Fauzdar
– Lalit Fauzdar, Commented May 27, 2020 at 15:37
@LalitFauzdar I don't think I can solve it with the post alone. My guess is to use BitmapFactory.decodeStream to create a Bitmap and assign that value into a corresponding ImageView id. Is this correct? — 小尾穣
– 小尾穣, Commented May 27, 2020 at 16:24
@小尾穣 if you know how to convert a byte array into Bitmap then what challenge you are facing to set that bitmap into Imageview. Please describe your problem more specific — DeveloperByChoice
– DeveloperByChoice, Commented May 27, 2020 at 16:46
I'm still uncertain about converting byte into Bitmap since i never this tried before. Also i'm not familiar with assigning values to Imageview id dynamically so this is also new to me. Thats why I want to 1. know that my approach is appropriate and 2. have a sample kotlin syntax to achieve my goal. — 小尾穣
– 小尾穣, Commented May 27, 2020 at 16:54

DeveloperByChoice · Accepted Answer · 2020-05-28 04:55:47Z

0

//optional code

  val bmp = BitmapFactory.decodeResource(resources, R.drawable.person)
val stream = ByteArrayOutputStream()
bmp.compress(Bitmap.CompressFormat.PNG, 100, stream)

// assign bytes getting from seerver to byteArray

val byteArray: ByteArray = stream.toByteArray()
val bitmap = BitmapFactory.decodeByteArray(byteArray, 0, byteArray.size)
imageView.setImageBitmap(bitmap)

answered May 28, 2020 at 4:55

DeveloperByChoice

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