How to convert Imageview to bytearray in Android Kotlin

In this android kotlin source code example, we are going to convert Imageview to bytearray in Android Kotlin.

You can copy and adopt this source code example to your Kotlin android project without reinventing the wheel.

Below is a step by step source code to convert Imageview to bytearray in Android Kotlin.

activity_main.xml

<?xml version="1.0" encoding="utf-8"?>
<androidx.constraintlayout.widget.ConstraintLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    tools:context=".imageView.ImageViewActivity14">

    <ImageView
        android:id="@+id/imageView"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:src="@drawable/profilepic"
        app:layout_constraintTop_toTopOf="parent"
        app:layout_constraintBottom_toBottomOf="parent"
        app:layout_constraintStart_toStartOf="parent"
        app:layout_constraintEnd_toEndOf="parent"/>

</androidx.constraintlayout.widget.ConstraintLayout>

MainActivity.kt

import android.annotation.SuppressLint
import androidx.appcompat.app.AppCompatActivity
import android.os.Bundle
import com.bluapp.kotlinview.R
import android.graphics.Bitmap
import android.graphics.drawable.BitmapDrawable
import android.widget.ImageView
import java.io.ByteArrayOutputStream


class ImageViewActivity14 : AppCompatActivity() {

    @SuppressLint("WrongThread")
    override fun onCreate(savedInstanceState: Bundle?) {
        super.onCreate(savedInstanceState)
        setContentView(R.layout.activity_image_view14)
        val imageView = findViewById<ImageView>(R.id.imageView) as ImageView
        val drawable = imageView.getDrawable()
        val bitmap = (drawable as BitmapDrawable).bitmap
        val stream = ByteArrayOutputStream()
        bitmap.compress(Bitmap.CompressFormat.JPEG, 100, stream)
        val bitmapdata = stream.toByteArray()
    }
}

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