0
0
Android Kotlinmobile~10 mins

LazyColumn with items in Android Kotlin - UI Render Trace

Choose your learning style9 modes available
Component - LazyColumn with items

This UI component shows a vertical list that only creates the visible items on screen. It helps apps run smoothly by loading items as you scroll.

Widget Tree
LazyColumn
└── items (list of Text)
The LazyColumn is the main vertical scrolling list. Inside it, each item is a Text composable showing a string from the list.
Render Trace - 2 Steps
Step 1: LazyColumn
Step 2: items
State Change - Re-render
Trigger:User scrolls the list
Before
Only first few items are composed and displayed
After
New items come into view and are composed; old items go out of view and are disposed
Re-renders:Only the visible items inside LazyColumn recompose
UI Quiz - 3 Questions
Test your understanding
What does LazyColumn do when you scroll?
AIt creates only the items visible on screen
BIt creates all items at once
CIt stops scrolling automatically
DIt hides the list
Key Insight
Using LazyColumn helps apps handle long lists efficiently by only creating what the user sees, saving memory and improving performance.