ListView.builder

Learn to build large lists efficiently with ListView.builder.

ListView.builder

ListView.builder builds large lists efficiently. Instead of rendering all items at once, it creates only the items visible on screen. itemCount sets the total item count and itemBuilder determines how each item is built.

ListView.builder(
  itemCount: 100,
  itemBuilder: (context, index) {
    return ListTile(
      title: Text('Öğe $index'),
    );
  },
)

itemCount and itemBuilder

itemCount sets the total item count in the list; if omitted, ListView treats the list as infinite. itemBuilder takes a BuildContext and an index; the index parameter starts at 0 and tells which item to build. itemBuilder must return a widget for each item.

final isimler = ['Ada', 'Bora', 'Cem', 'Deniz'];

ListView.builder(
  itemCount: isimler.length,
  itemBuilder: (context, index) {
    return ListTile(
      title: Text(isimler[index]),
    );
  },
)

Exercise Print ListView.builder info

In main, print two lines with print: builder verimli and index sira.

Show example solution

void main() {
  print('builder verimli');
  print('index sira');
}

Test yourself

When is ListView.builder preferred?
- When the list will not scroll
- When the list is large or the count is unknown
- When the list is very small (1-2 items)
- When the list will be horizontal
Show answer

When the list is large or the count is unknown — ListView.builder renders only the visible items; it boosts performance for large lists.

Total item count

ListView.builder(
  ____: 50,
  itemBuilder: (context, index) =&gt; Text('$index'),
)

Show answer

ListView.builder(
  itemCount: 50,
  itemBuilder: (context, index) =&gt; Text('$index'),
)

ListView.builder concepts

ListView.builder

Efficient list builder
itemCount

Total item count
itemBuilder

Function building each item
index

Item's position

Next lesson: ListTile

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