Camera, gallery, file downloads and native sharing — let's make a React Native app interact with the real capabilities of a phone!

Welcome to Video 30 of AI Mobile Engineer 2026, where we officially begin Phase 4: Native Device Engineering.

In this practical lecture, we build a React Native Expo application that works with the device's camera, media gallery, local file storage, downloads and native sharing functionality.

We'll use Gemini to create a professional development prompt, give that prompt to Cursor AI to implement the app, and then test the features on a physical device using Expo Go.

CAMERA: EXPO CAMERA
Capture photos and videos directly from the app.
Switch between the front and back cameras.
Explore camera access and permissions.

GALLERY: EXPO IMAGE PICKER
Select images and videos from the phone's media library.
Handle selected media inside the app.

FILES: EXPO FILESYSTEM
Save and manage files in app storage.
Work with local file URIs.
Understand how the app handles stored media and documents.

FILE DOWNLOADER
Download images and PDF documents from the internet.
Manage downloaded files within the app.

NATIVE SHARING
Share captured or downloaded files.
Open the native sharing interface.
Use compatible messaging, email and other installed apps.

GEMINI + CURSOR AI WORKFLOW
Generate a professional development prompt using Gemini.
Use Cursor AI to implement the app.
Build with React Native Expo, Expo Router, NativeWind and Moti.
Review, run and test the implementation instead of blindly trusting AI-generated code.

PHYSICAL DEVICE TESTING
Run the application with Expo Go and test the supported camera, gallery, file and sharing features on an actual phone.

This lecture marks the beginning of Native Device Engineering, where we move beyond UI and backend integration to explore the capabilities of mobile devices.

AI Native Workflow:
Think → Prompt → Review → Debug → Test → Ship

Subscribe to The Techzeen to become a high-paying AI Cross-Platform Mobile App Engineer.

Website:
https://www.thetechzeen.com/

Complete Playlist:
https://www.youtube.com/playlist?list=PLIKgFOVIOd1Y

WhatsApp Community:
https://whatsapp.com/channel/0029VbDmJP617Emr7OAPtp1H

GitHub Source Code:
https://github.com/farzeen-ali/Expo-Native-Features

GitHub Lecture Files:
https://github.com/farzeen-ali/AI-Mob-Engineer-Concepts

WhatsApp Community:
https://whatsapp.com/channel/0029VbDmJP617Emr7OAPtp1H

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