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Tugas 3 Android Studio Selection Sort

MainActivity.kt

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+package com.example.Kalkulator
+
+import android.os.Bundle
+import androidx.activity.ComponentActivity
+import androidx.activity.compose.setContent
+import androidx.compose.foundation.background
+import androidx.compose.foundation.layout.Box
+import androidx.compose.foundation.layout.Column
+import androidx.compose.foundation.layout.Spacer
+import androidx.compose.foundation.layout.fillMaxSize
+import androidx.compose.foundation.layout.fillMaxWidth
+import androidx.compose.foundation.layout.height
+import androidx.compose.foundation.layout.padding
+import androidx.compose.foundation.lazy.LazyColumn
+import androidx.compose.foundation.lazy.items
+import androidx.compose.material3.Button
+import androidx.compose.material3.OutlinedTextField
+import androidx.compose.material3.Scaffold
+import androidx.compose.material3.Text
+import androidx.compose.material3.TopAppBar
+import androidx.compose.material3.TopAppBarDefaults
+import androidx.compose.runtime.Composable
+import androidx.compose.runtime.getValue
+import androidx.compose.runtime.mutableStateOf
+import androidx.compose.runtime.remember
+import androidx.compose.runtime.setValue
+import androidx.compose.ui.Alignment
+import androidx.compose.ui.Modifier
+import androidx.compose.ui.graphics.Color
+import androidx.compose.ui.text.font.FontWeight
+import androidx.compose.ui.unit.dp
+import androidx.compose.ui.unit.sp
+
+class MainActivity : ComponentActivity() {
+    override fun onCreate(savedInstanceState: Bundle?) {
+        super.onCreate(savedInstanceState)
+        setContent {
+            SelectionSortApp()
+        }
+    }
+}
+
+@Composable
+fun SelectionSortApp() {
+    var inputText by remember { mutableStateOf("") }
+    var numbers by remember { mutableStateOf(listOf<Int>()) }
+    var sortedNumbers by remember { mutableStateOf(listOf<Int>()) }
+
+    fun selectionSort(list: List<Int>): List<Int> {
+        val arr = list.toMutableList()
+        for (i in 0 until arr.size - 1) {
+            var minIndex = i
+            for (j in i + 1 until arr.size) {
+                if (arr[j] < arr[minIndex]) {
+                    minIndex = j
+                }
+            }
+            // Tukar posisi elemen
+            val temp = arr[i]
+            arr[i] = arr[minIndex]
+            arr[minIndex] = temp
+        }
+        return arr
+    }
+
+    Scaffold(
+        topBar = {
+            TopAppBar(
+                title = { Text("Selection Sort Demo") },
+                colors = TopAppBarDefaults.topAppBarColors(
+                    containerColor = Color(0xFF1565C0),
+                    titleContentColor = Color.White
+                )
+            )
+        }
+    ) { padding ->
+        Column(
+            modifier = Modifier
+                .padding(padding)
+                .fillMaxSize()
+                .padding(16.dp),
+            horizontalAlignment = Alignment.CenterHorizontally
+        ) {
+            Text(
+                "Masukkan angka dipisahkan dengan koma (contoh: 5,3,8,1,4)",
+                fontSize = 16.sp
+            )
+
+            Spacer(modifier = Modifier.height(10.dp))
+
+            OutlinedTextField(
+                value = inputText,
+                onValueChange = { inputText = it },
+                label = { Text("Input Angka") },
+                singleLine = true,
+                modifier = Modifier.fillMaxWidth()
+            )
+
+            Spacer(modifier = Modifier.height(16.dp))
+
+            Button(onClick = {
+                try {
+                    numbers = inputText.split(",").map { it.trim().toInt() }
+                    sortedNumbers = selectionSort(numbers)
+                } catch (e: Exception) {
+                    sortedNumbers = emptyList()
+                }
+            }) {
+                Text("Urutkan (Selection Sort)")
+            }
+
+            Spacer(modifier = Modifier.height(20.dp))
+
+            if (sortedNumbers.isNotEmpty()) {
+                Text("Hasil Pengurutan:", fontWeight = FontWeight.Bold, fontSize = 18.sp)
+                Spacer(modifier = Modifier.height(8.dp))
+                LazyColumn {
+                    items(sortedNumbers) { num ->
+                        Box(
+                            modifier = Modifier
+                                .fillMaxWidth()
+                                .padding(4.dp)
+                                .background(Color(0xFFBBDEFB))
+                                .padding(12.dp)
+                        ) {
+                            Text(text = num.toString(), fontSize = 20.sp)
+                        }
+                    }
+                }
+            }
+        }
+    }
+}