Lesson 1: Overview of Expo SDK

Overview of Expo SDK

The Expo SDK is a powerful set of libraries and tools that simplify React Native development. It includes a wide range of APIs for handling various tasks, such as accessing device features, managing assets, and integrating third-party services.

Core Components and APIs:

1. Expo.Constants: Provides information about the app’s environment.
   import Constants from 'expo-constants';
console.log(Constants.platform);

2. Expo.Permissions: Manages permissions for accessing device features like the camera and location.
   import * as Permissions from 'expo-permissions';
const { status } = await Permissions.askAsync(Permissions.CAMERA);

3. Expo.Asset: Manages and caches assets like images and fonts.
   import { Asset } from 'expo-asset';
const image = Asset.fromModule(require('./path-to-image.png')).downloadAsync();

4. Expo.Location: Provides methods to get the device’s current location.
   import * as Location from 'expo-location';
const location = await Location.getCurrentPositionAsync({});


Real-World Scenario: For “JUST-Learning,” Expo SDK enables us to quickly integrate essential features like media handling, notifications, and geolocation, enhancing the app’s functionality and user experience.

Conclusion: The Expo SDK provides a comprehensive set of tools and APIs that streamline mobile app development with React Native. Understanding these components will help you leverage Expo to its full potential.