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MainActivity.kt

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+package com.example.selectionsort
+
+import android.os.Bundle
+import androidx.activity.ComponentActivity
+import androidx.activity.compose.setContent
+import androidx.activity.enableEdgeToEdge
+import androidx.compose.foundation.layout.Column
+import androidx.compose.foundation.layout.fillMaxSize
+import androidx.compose.foundation.layout.padding
+import androidx.compose.foundation.rememberScrollState
+import androidx.compose.foundation.verticalScroll
+import androidx.compose.material3.MaterialTheme
+import androidx.compose.material3.Scaffold
+import androidx.compose.material3.Text
+import androidx.compose.runtime.Composable
+import androidx.compose.runtime.remember
+import androidx.compose.ui.Modifier
+import androidx.compose.ui.tooling.preview.Preview
+import androidx.compose.ui.unit.dp
+import com.example.selectionsort.ui.theme.SelectionSortTheme
+
+class MainActivity : ComponentActivity() {
+    override fun onCreate(savedInstanceState: Bundle?) {
+        super.onCreate(savedInstanceState)
+        enableEdgeToEdge()
+        setContent {
+            SelectionSortTheme {
+                Scaffold(modifier = Modifier.fillMaxSize()) { innerPadding ->
+                    SelectionSortScreen(modifier = Modifier.padding(innerPadding))
+                }
+            }
+        }
+    }
+}
+
+@Composable
+fun SelectionSortScreen(modifier: Modifier = Modifier) {
+    // Daftar angka acak 10 elemen antara 10–99
+    val numbers = remember { (10..99).shuffled().take(10) }
+
+    // Proses Selection Sort
+    val sortedNumbers = remember {
+        numbers.toMutableList().apply {
+            for (i in 0 until size - 1) {
+                var minIndex = i
+                for (j in i + 1 until size) {
+                    if (this[j] < this[minIndex]) {
+                        minIndex = j
+                    }
+                }
+                if (minIndex != i) {
+                    val temp = this[i]
+                    this[i] = this[minIndex]
+                    this[minIndex] = temp
+                }
+            }
+        }
+    }
+
+    Column(
+        modifier = modifier
+            .padding(16.dp)
+            .verticalScroll(rememberScrollState())
+    ) {
+        Text(
+            text = "🔢 Daftar Angka Sebelum Diurutkan:",
+            style = MaterialTheme.typography.titleMedium
+        )
+        Text(text = numbers.joinToString(", "))
+
+        Text(text = "")
+        Text(
+            text = "✅ Hasil Setelah Diurutkan (Selection Sort):",
+            style = MaterialTheme.typography.titleMedium
+        )
+        Text(text = sortedNumbers.joinToString(", "))
+
+        Text(text = "")
+        Text(
+            text = "🧠 Cara Kerja Selection Sort:",
+            style = MaterialTheme.typography.titleMedium
+        )
+        Text(
+            text = "Algoritma ini mencari nilai terkecil dari bagian data yang belum diurutkan, " +
+                    "lalu menukarnya dengan posisi paling depan. Langkah ini diulang terus " +
+                    "hingga seluruh data terurut dari yang terkecil ke terbesar."
+        )
+    }
+}
+
+@Preview(showBackground = true)
+@Composable
+fun SelectionSortScreenPreview() {
+    SelectionSortTheme {
+        SelectionSortScreen()
+    }
+}