执行expo start时app.json字段验证错误，求解决方案

执行expo start时触发以下配置验证错误：

Error: Problems validating fields in app.json.
• 不应存在额外属性'adaptiveIcon'。
• 不应存在额外属性'permissions'。
• 不应存在额外属性'versionCode'。
• 字段：android - 不应存在额外属性'googleMobileAdsAppId'。
• 字段：android.config - 不应存在额外属性'googleServicesFile'。

修复步骤 #

针对每个错误点，调整app.json的配置位置或方式：

1. 移动 adaptiveIcon 到Android配置块
   adaptiveIcon是Android专属配置，必须放在expo.android对象内部，不能在根级expo对象下。

2. 调整 versionCode 到Android配置块
   Android的versionCode属于平台专属版本号，需要移到expo.android对象中，根级仅保留通用的version字段。

3. 替换根级 permissions 字段
   Expo SDK 41+已废弃根级permissions，Android权限需移到expo.android.permissions数组中；iOS权限已通过infoPlist配置说明，无需额外添加。

4. 配置 googleMobileAdsAppId 到AdMob插件
   将googleMobileAdsAppId整合到expo-ads-admob插件配置中，而非直接放在android对象下。

5. 调整 googleServicesFile 配置方式
   Firebase的googleServicesFile需通过@react-native-firebase/app对应的Expo插件声明，移除android.config下的该字段。

修改后的完整app.json示例 #

{
  "expo": {
    "name": "xx",
    "slug": "xx",
    "version": "1.0.0",
    "scheme": "xx",
    "plugins": [
      [
        "expo-document-picker",
        {
          "appleTeamId": "NHHHUJTTT",
          "iCloudContainerEnvironment": "Production"
        }
      ],
      [
        "expo-notifications",
        {
          "icon": "./assets/icon96x96.png",
          "color": "#5675",
          "mode": "production"
        }
      ],
      [
        "expo-ads-admob",
        {
          "userTrackingPermission": "wants to track you to collect IDFA to deliver personalised ads.",
          "androidAppId": "ca-app-pub-######~2444070320"
        }
      ],
      [
        "expo-tracking-transparency",
        {
          "userTrackingPermission": "wants to track you to collect IDFA to deliver personalised ads."
        }
      ],
      [
        "@react-native-firebase/app",
        {
          "googleServicesFile": "./google-services.json"
        }
      ]
    ],
    "orientation": "portrait",
    "icon": "./assets/icon.png",
    "splash": {
      "image": "./assets/splash.png",
      "backgroundColor": "#F723",
      "resizeMode": "cover"
    },
    "notification": {
      "icon": "./assets/icon96x96.png",
      "color": "#F2320",
      "iosDisplayInForeground": true,
      "androidMode": "default"
    },
    "updates": {
      "fallbackToCacheTimeout": 0
    },
    "assetBundlePatterns": [
      "**/*"
    ],
    "ios": {
      "usesAppleSignIn": true,
      "supportsTablet": true,
      "bundleIdentifier": "com.XXxX",
      "buildNumber": "1",
      "usesIcloudStorage": true,
      "infoPlist": {
        "NSCameraUsageDescription": "Your App Name uses the camera to capture and upload user profile image and Listing Image to the server.",
        "NSPhotoLibraryUsageDescription": "Your App Name needs access to the photo library to select and upload user profile image and Listing Image to the server.",
        "NSPhotoLibraryAddUsageDescription": "Your App Name needs access to the photo library to select and upload user profile image and Listing Image to the server.",
        "NSLocationWhenInUseUsageDescription": "Your App Name usages device location on listing information, Listing search Data and User information.",
        "NSLocationAlwaysAndWhenInUseUsageDescription": "Your App Name usages device location on listing information, Listing search Data and User information.",
        "NSLocationAlwaysUsageDescription": "Your App Name uses device location on listing information, Listing search Data and User information.",
        "NSMicrophoneUsageDescription": "Your App Name uses your microphone while taking video of your product for uploading in listing information.",
        "CFBundleAllowMixedLocalizations": true,
        "UIBackgroundModes": [
          "remote-notification"
        ],
        "NSUserTrackingUsageDescription": " wants to track you to collect IDFA to deliver personalised ads.",
        "SKAdNetworkItems": [
          {
            "SKAdNetworkIdentifier": "cstr6suwn9.skadnetwork"
          }
        ]
      },
      "config": {
        "googleMapsApiKey": "mjo8@#$%^&*(NYH87HNYB87B87"
      }
    },
    "web": {
      "favicon": "./assets/favicon.png"
    },
    "android": {
      "package": "com.adfars",
      "versionCode": 17,
      "adaptiveIcon": {
        "foregroundImage": "./assets/adaptive-icon.png",
        "backgroundColor": "#fff"
      },
      "permissions": [
        "CAMERA",
        "CAMERA_ROLL",
        "MEDIA_LIBRARY",
        "READ_EXTERNAL_STORAGE",
        "WRITE_EXTERNAL_STORAGE",
        "RECORD_AUDIO",
        "READ_PHONE_STATE",
        "READ_CONTACTS",
        "LOCATION",
        "ACCESS_COARSE_LOCATION",
        "ACCESS_FINE_LOCATION",
        "RECEIVE_BOOT_COMPLETED"
      ],
      "config": {
        "googleMaps": {
          "apiKey": "mjo8H878ON7o7YN78NY####NYB87B87"
        }
      }
    },
    "extra": {
      "eas": {
        "projectId": "########-48e8-9250-b8fe859b188b"
      }
    }
  },
  "facebookScheme": "fb87867657656546545",
  "facebookAppId": "87867657656546545",
  "facebookDisplayName": "Your facebook app name",
  "scheme": "com.xxxx"
}

补充说明 #

• 若使用Firebase，需先安装依赖：npx expo install @react-native-firebase/app
• 若不采用EAS Build，也可通过原生配置方式集成google-services.json，但插件方式更适配Expo项目的一致性要求。

内容的提问来源于stack exchange，提问作者ShafiJan