React Native项目卡Loading dependency graph及无index.android.js问题求助

Hey there, let’s tackle your React Native issues step by step—they’re tied to how create-react-native-app (CRNA) projects are structured, so let’s start with the missing index.android.js confusion first.

First: Why you don’t see index.android.js in your Android folder #

When you create a project with create-react-native-app, you’re setting up an Expo-managed workflow project. In this setup, all the native code (including files like index.android.js) is handled and hosted by Expo behind the scenes—you won’t see these native files in your project root by default.

You only get access to the android folder and its native entry files if you convert the project to a bare workflow (where you manage native code yourself). This is only necessary if you need to add custom native modules or modify core native behavior—for most use cases, the Expo-managed workflow works perfectly fine without touching native code.

Fixing the "Loading dependency graph" hang issue #

That stuck loading screen is almost always related to caching, dependency conflicts, network issues, or port conflicts. Let’s work through the most common fixes in order:

• Reset the Metro bundler cache
  Metro (React Native’s bundler) often gets tripped up by stale cache. Run this in your project root to clear it:

  # If you're using Expo CLI
  expo start -c
  # Or for vanilla React Native
  npx react-native start --reset-cache
  

  Then try restarting your project.

• Reinstall your dependencies
  Corrupted or incomplete node_modules can cause bundler hangs. Wipe them clean and reinstall:

  # Delete node_modules and lock files
  rm -rf node_modules package-lock.json yarn.lock
  # Reinstall (use yarn if that's your package manager)
  npm install
  

• Check network/proxy settings
  Metro needs to fetch some runtime dependencies, and a misconfigured proxy can block this. Verify and reset your npm proxy settings if needed:

  # Check current proxy config
  npm config get proxy
  npm config get https-proxy
  # Clear proxies if they're unnecessary
  npm config delete proxy
  npm config delete https-proxy
  

  Also, try disabling any VPN or firewall temporarily to rule out network blocks.

• Check for port conflicts
  Metro uses port 8081 by default. If another app is using this port, the bundler will get stuck. Find and kill the process using the port:

  # macOS/Linux
  lsof -i :8081 | grep LISTEN | awk '{print $2}' | xargs kill -9
  # Windows (PowerShell)
  Stop-Process -Id (Get-NetTCPConnection -LocalPort 8081).OwningProcess -Force
  

• Update or downgrade Expo/CRNA tools
  Sometimes version bugs cause bundler issues. Try updating Expo CLI to the latest stable version:

  npm install -g expo-cli
  

  If the latest version is problematic, try a known-stable older version (e.g., expo-cli@4.12.10—adjust based on recent stable releases).

If you need access to native Android code #

If you must modify native Android files (like adding a custom SDK), convert your project to a bare workflow with:

expo prebuild

This will generate the android and ios folders, including index.android.js and other native configuration files. Just note that this means you’ll have to maintain native code yourself going forward.

内容的提问来源于stack exchange，提问作者aasifghanchi