import androidx.appcompat.app.AppCompatActivity
import android.os.Bundle
import android.widget.Button
import android.widget.ImageView
import android.widget.TextView
import com.google.android.material.snackbar.Snackbar
import java.io.File
import java.io.FileOutputStream
import java.io.IOException
import java.util.*

class MainActivity : AppCompatActivity() {

    private var previousImage: Bitmap? = null

    override fun onCreate(savedInstanceState: Bundle?) {
        super.onCreate(savedInstanceState)
        setContentView(R.layout.activity_main)

        // Initialize the UI elements
        val scanButton = findViewById<Button>(R.id.scan_button)
        val imageView = findViewById<ImageView>(R.id.image_view)
        val textView = findViewById<TextView>(R.id.text_view)

        // Set the click listener for the scan button
        scanButton.setOnClickListener {
            // Capture the current image
            val image = captureImage()

            // Analyze the image to find the edges of the slide
            val edges = findEdges(image)

            // Find the area of the image that has not yet been captured
            val areaYetToCapture = findAreaYetToCapture(edges)

            // Stitch the area yet to capture to the previous image
            val stitchedImage = stitchImage(areaYetToCapture)

            // Set the previous image to the current image
            previousImage = image

            // Display the stitched image
            imageView.setImageBitmap(stitchedImage)
        }
    }

    // Capture the current image
    private fun captureImage(): Bitmap {
        // TODO: Implement the code to capture the current image
        return Bitmap.createBitmap(100, 100, Bitmap.Config.ARGB_8888)
    }

    // Find the edges of the slide
    private fun findEdges(image: Bitmap): List<Float> {
        // TODO: Implement the code to find the edges of the slide
        return emptyList()
    }

    // Find the area of the image that has not yet been captured
    private fun findAreaYetToCapture(edges: List<Float>): Rect {
        // TODO: Implement the code to find the area of the image that has not yet been captured
        return Rect()
    }

    // Stitch the area yet to capture to the previous image
    private fun stitchImage(areaYetToCapture: Rect): Bitmap {
        // TODO: Implement the code to stitch the area yet to capture to the previous image
        return Bitmap()
    }
}

Kotlin online compiler

Write, Run & Share Kotlin code online using OneCompiler’s Kotlin online compiler for free. It’s a modern and fast online playground for Kotlin, supporting the latest version and ideal for learning, experimenting, and sharing code instantly.

About Kotlin

Kotlin is a statically typed, modern programming language developed by JetBrains. It runs on the JVM and is fully interoperable with Java. Kotlin is concise, expressive, and safe, and it’s officially supported by Google for Android app development.

Sample Code

The following is a simple Kotlin program that prints a greeting:

fun main() {
    println("Hello, OneCompiler!")
}

Taking inputs (stdin)

OneCompiler’s Kotlin editor supports stdin. You can provide input using the I/O tab. Here's a sample program that reads a line of input and prints a greeting:

fun main() {
    print("Enter your name: ")
    val name = readLine()
    println("Hello, $name")
}

Syntax Basics

Variables

val name: String = "OneCompiler"  // Immutable
var age: Int = 25                 // Mutable

Kotlin supports type inference, so explicit types are optional:

val city = "Hyderabad"
var count = 10

Conditionals

val score = 85
if (score >= 50) {
    println("Pass")
} else {
    println("Fail")
}

Loops

For loop

for (i in 1..5) {
    println(i)
}

While loop

var i = 1
while (i <= 5) {
    println(i)
    i++
}

Do-While loop

var j = 1
do {
    println(j)
    j++
} while (j <= 5)

Functions

fun add(a: Int, b: Int): Int {
    return a + b
}

fun greet(name: String) = "Hello, $name"

Collections

val items = listOf("apple", "banana", "cherry")
for (item in items) {
    println(item)
}

This guide provides a quick reference to Kotlin programming syntax and features. Start coding in Kotlin using OneCompiler’s Kotlin online compiler today!