项目根目录下
1.mkdir android/app/src/main/assets
2.react-native bundle --platform android --dev false --entry-file index.js --bundle-output android/app/src/main/assets/index.android.bundle --assets-dest android/app/src/main/res
3.react-native run-android
解决方法链接 https://stackoverflow.com/questions/44446523/unable-to-load-script-from-assets-index-android-bundle-on-windows