Improving List Rendering with Real API Data
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Now we want to make the list feel like a real app. Instead of mock data, you will load products from an API.
This gives you:
- Real titles;
- Descriptions;
- Images (later useful for details screen).
Step 1: Fetch Data
Update your HomeScreen.js:
// screens/HomeScreen.js
import { useEffect, useState } from 'react';
import { View, Text, Pressable, StyleSheet } from 'react-native';
export default function HomeScreen({ navigation }) {
const [items, setItems] = useState([]);
useEffect(() => {
async function loadProducts() {
const response = await fetch('https://dummyjson.com/products');
const data = await response.json();
console.log(data.products);
setItems(data.products.slice(0, 10));
}
loadProducts();
}, []);
return (
<View style={styles.container}>
<Text style={styles.header}>Products</Text>
{items.map((item) => (
<Pressable
key={item.id}
onPress={() => navigation.navigate('Details', { item })}
style={styles.item}
>
<Text style={styles.itemTitle}>{item.title}</Text>
</Pressable>
))}
</View>
);
}
Step 2: Add Styles
// screens/HomeScreen.js
const styles = StyleSheet.create({
container: {
padding: 20
},
header: {
fontSize: 22,
fontWeight: 'bold',
marginBottom: 15
},
item: {
padding: 12,
backgroundColor: 'lightgray',
marginBottom: 10,
borderRadius: 8
},
itemTitle: {
fontSize: 16
}
});
What Changed
- You now load real data from an API;
- Each item represents a real product;
- The app starts to feel realistic;
- You pass full item data to the next screen.
War alles klar?
Danke für Ihr Feedback!
Abschnitt 1. Kapitel 4
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Improving List Rendering with Real API Data
Now we want to make the list feel like a real app. Instead of mock data, you will load products from an API.
This gives you:
- Real titles;
- Descriptions;
- Images (later useful for details screen).
Step 1: Fetch Data
Update your HomeScreen.js:
// screens/HomeScreen.js
import { useEffect, useState } from 'react';
import { View, Text, Pressable, StyleSheet } from 'react-native';
export default function HomeScreen({ navigation }) {
const [items, setItems] = useState([]);
useEffect(() => {
async function loadProducts() {
const response = await fetch('https://dummyjson.com/products');
const data = await response.json();
console.log(data.products);
setItems(data.products.slice(0, 10));
}
loadProducts();
}, []);
return (
<View style={styles.container}>
<Text style={styles.header}>Products</Text>
{items.map((item) => (
<Pressable
key={item.id}
onPress={() => navigation.navigate('Details', { item })}
style={styles.item}
>
<Text style={styles.itemTitle}>{item.title}</Text>
</Pressable>
))}
</View>
);
}
Step 2: Add Styles
// screens/HomeScreen.js
const styles = StyleSheet.create({
container: {
padding: 20
},
header: {
fontSize: 22,
fontWeight: 'bold',
marginBottom: 15
},
item: {
padding: 12,
backgroundColor: 'lightgray',
marginBottom: 10,
borderRadius: 8
},
itemTitle: {
fontSize: 16
}
});
What Changed
- You now load real data from an API;
- Each item represents a real product;
- The app starts to feel realistic;
- You pass full item data to the next screen.
War alles klar?
Danke für Ihr Feedback!
Abschnitt 1. Kapitel 4