LazyGrid in Android Kotlin - Cheat Sheet & Quick Revision

Recall & Review

beginner

What is a LazyGrid in Android Jetpack Compose?

LazyGrid is a composable that efficiently displays a scrollable grid of items. It only composes and lays out visible items, saving memory and improving performance.

beginner

How do you specify the number of columns in a LazyVerticalGrid?

You use the columns parameter with GridCells.Fixed(count) to set a fixed number of columns.

intermediate

What is the difference between LazyVerticalGrid and LazyHorizontalGrid?

LazyVerticalGrid scrolls vertically and arranges items in columns, while LazyHorizontalGrid scrolls horizontally and arranges items in rows.

intermediate

Why is LazyGrid preferred over a regular Grid layout for large data sets?

Because LazyGrid only composes items currently visible on screen, it uses less memory and improves performance compared to composing all items at once.

intermediate

How can you add spacing between items in a LazyGrid?

You can add spacing by using the contentPadding parameter for padding around the grid and verticalArrangement and horizontalArrangement parameters to space items inside the grid.

Which parameter sets the number of columns in a LazyVerticalGrid?

A columns = GridCells.Fixed(3)

B rows = GridCells.Fixed(3)

C count = 3

D span = 3

The columns parameter with GridCells.Fixed sets the fixed number of columns.

What is the main advantage of using LazyGrid over a regular grid layout?

A It supports animations automatically

B It composes only visible items for better performance

C It allows infinite scrolling without code

D It automatically adjusts column count

LazyGrid composes only visible items, saving memory and improving performance.

Which LazyGrid variant scrolls horizontally?

A LazyHorizontalGrid

B LazyVerticalGrid

C LazyGridScroll

D LazyGridHorizontalScroll

LazyHorizontalGrid scrolls horizontally.

How do you add padding around the entire LazyGrid?

A Use horizontalArrangement

B Use padding modifier on each item

C Use verticalArrangement

D Use contentPadding parameter

contentPadding adds padding around the whole grid.

Which Jetpack Compose function is used to create a LazyGrid?

A LazyColumn

B LazyRow

C LazyVerticalGrid

D GridLayout

LazyVerticalGrid creates a vertical scrolling grid.

Explain how LazyGrid improves performance when displaying many items.

Think about what happens when you scroll a long list.

Describe how to customize the number of columns and spacing in a LazyVerticalGrid.

Focus on parameters controlling layout and spacing.