ScaffoldDemo

Cnvmendoza

Mar 12th, 2025 (edited)

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package com.example.scaffolddemo
import android.os.Bundle
import androidx.activity.ComponentActivity
import androidx.activity.compose.setContent
import androidx.activity.enableEdgeToEdge
import androidx.compose.foundation.layout.Arrangement
import androidx.compose.foundation.layout.Row
import androidx.compose.foundation.layout.fillMaxSize
import androidx.compose.foundation.layout.fillMaxWidth
import androidx.compose.foundation.layout.padding
import androidx.compose.foundation.lazy.LazyColumn
import androidx.compose.foundation.lazy.items
import androidx.compose.material.icons.Icons
import androidx.compose.material.icons.filled.AccountBox
import androidx.compose.material.icons.filled.Add
import androidx.compose.material.icons.filled.Delete
import androidx.compose.material.icons.filled.Refresh
import androidx.compose.material3.Card
import androidx.compose.material3.CardDefaults
import androidx.compose.material3.ExperimentalMaterial3Api
import androidx.compose.material3.FloatingActionButton
import androidx.compose.material3.Icon
import androidx.compose.material3.IconButton
import androidx.compose.material3.MaterialTheme
import androidx.compose.material3.Scaffold
import androidx.compose.material3.Surface
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.mutableStateListOf
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.text.font.FontWeight
import androidx.compose.ui.tooling.preview.Preview
import androidx.compose.ui.unit.dp
import com.example.scaffolddemo.ui.theme.ScaffoldDemoTheme
class MainActivity : ComponentActivity() {
override fun onCreate(savedInstanceState: Bundle?) {
super.onCreate(savedInstanceState)
enableEdgeToEdge()
setContent {
TaskManagerApp()
}
}
}
@OptIn(ExperimentalMaterial3Api::class)
@Composable
fun TaskManagerApp() {
var taskCounter by remember { mutableStateOf(1) }
var taskList = remember { mutableStateListOf<String>() }
Scaffold(
topBar = { TaskAppBar() },
floatingActionButton = {
FloatingActionButton(
onClick = {
taskList.add("Task $taskCounter")
taskCounter++
},
containerColor = MaterialTheme.colorScheme.primary
) {
Icon(imageVector = Icons.Filled.Add, contentDescription = "Add Task")
}
},
content = { paddingValues ->
Surface(
modifier = Modifier
.fillMaxSize()
.padding(paddingValues)
.padding(16.dp)
) {
TaskList(taskList) { task -> taskList.remove(task)}
}
}
)
}
@OptIn(ExperimentalMaterial3Api::class)
@Composable
fun TaskAppBar() {
TopAppBar(
title = { Text(text = "Task Manager", fontWeight = FontWeight.Bold) },
actions = {
IconButton(onClick = { }) {
Icon(
imageVector = Icons.Filled.Refresh,
contentDescription = "Clear All Tasks"
)
}
IconButton(onClick = { }) {
Icon(
imageVector = Icons.Filled.AccountBox,
contentDescription = "Clear All Tasks"
)
}
},
colors = TopAppBarDefaults.topAppBarColors(MaterialTheme.colorScheme.primaryContainer)
)
}
@Composable
fun TaskList(tasks: List<String>, onDelete: (String) -> Unit) {
LazyColumn {
items(tasks) {
task -> TaskItem(task, onDelete)
}
}
}
@Composable
fun TaskItem(task: String, onDelete: (String) -> Unit) {
Card(
modifier = Modifier
.fillMaxSize()
.padding(8.dp),
elevation = CardDefaults.cardElevation(defaultElevation = 4.dp)
) {
Row(
modifier = Modifier
.fillMaxWidth()
.padding(16.dp),
verticalAlignment = Alignment.CenterVertically,
horizontalArrangement = Arrangement.SpaceBetween
) {
Text(text = task, fontWeight = FontWeight.Medium)
IconButton(onClick = { onDelete(task) }) {
Icon(imageVector = Icons.Filled.Delete, contentDescription = "Delete Task")
}
}
}
}

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