Gallery.js

const Tile = ({ id, url, onPress, isSelected }) => {
	<View
		source={url}
		onPress={onPress}
	/>
} 

const staticData = [
	{ id: 1, url: 'someurl1' },
	{ id: 2, url: 'someurl2' }
]

class List extends React.Compnent {
	state = { selectedIds: [] }

	handlePress = (id) => {
		const selectedIds = [...this.state.selectedIds, id]
		this.setState({ selectedIds })
	}

	isSelected = (id) => selectedIds.includes(id) 

	getData = () => {
		return staticData.map(({ id, url }) => ({
			id, 
			url, 
			onPress: () => this.handlePress(id), 
			isSelected: this.isSelected(id),
		})
	}

	renderItem = ({ item }) => (
		<Tile {...item}>
	)

	render () => {
		return (
			<FlatList
				data={this.getData()}
				renderItem={this.renderItem}	
			/>
		)
	}
}