AI Joke Generator in React Native | Part 3 — File Structure + Gemini API Setup + Constants

Part 3 of building a complete AI Joke Generator app using React Native Expo and Google Gemini API. In this part we set up the complete file structure, get our free Gemini API key from Google AI Studio, initialize the Gemini client, and build all constants - categories and prompts - that the entire app will use. What we cover: → File structure setup - constants, hooks, components, screens, utils → Get free API key from Google AI Studio → Store API key safely using EXPO_PUBLIC_ environment variable → Gemini client setup - initialize once, export model → constants/categories.js - all 5 categories with id, label, icon, color and all 5 category prompts + getRoastPrompt function Series: Build AI Joke Generator | React Native Expo + Gemini API Part 4 coming soon - subscribe so you don't miss it. GitHub: https://github.com/vikashkrdeveloper/AI-Joke-Generator #ReactNative #GeminiAPI #GoogleAI #ExpoGo #ReactNativeTutorial #AIApp #MobileApp