未解决的参考：R 和 BuildConfig in React Native Android Project with Kotlin

Question

我目前正在使用 Kotlin 开发 React Native 项目，在 Android Studio 的构建过程中遇到了一些问题。具体来说，我在 Kotlin 文件中遇到了未解决的参考：R 和未解决的参考：BuildConfig 错误。

React Native 版本：0.74.3 Kotlin 版本：1.9.23 摇篮版本：8.6 Android Studio 版本：最新

我的MainActivity.kt

  package com.thediamlaundry.diamapp

import android.os.Build
import android.os.Bundle

import com.facebook.react.ReactActivity
import com.facebook.react.ReactActivityDelegate
import com.facebook.react.defaults.DefaultNewArchitectureEntryPoint.fabricEnabled
import com.facebook.react.defaults.DefaultReactActivityDelegate

import expo.modules.ReactActivityDelegateWrapper

class MainActivity : ReactActivity() {
  override fun onCreate(savedInstanceState: Bundle?) {
    // Set the theme to AppTheme BEFORE onCreate to support
    // coloring the background, status bar, and navigation bar.
    // This is required for expo-splash-screen.
    setTheme(R.style.AppTheme);
    super.onCreate(null)
  }

  /**
   * Returns the name of the main component registered from JavaScript. This is used to schedule
   * rendering of the component.
   */
  override fun getMainComponentName(): String = "main"

  /**
   * Returns the instance of the [ReactActivityDelegate]. We use [DefaultReactActivityDelegate]
   * which allows you to enable New Architecture with a single boolean flags [fabricEnabled]
   */
  override fun createReactActivityDelegate(): ReactActivityDelegate {
    return ReactActivityDelegateWrapper(
          this,
          BuildConfig.IS_NEW_ARCHITECTURE_ENABLED,
          object : DefaultReactActivityDelegate(
              this,
              mainComponentName,
              fabricEnabled
          ){})
  }

  /**
    * Align the back button behavior with Android S
    * where moving root activities to background instead of finishing activities.
    * @see <a href="https://developer.android.com/reference/android/app/Activity#onBackPressed()">onBackPressed</a>
    */
  override fun invokeDefaultOnBackPressed() {
      if (Build.VERSION.SDK_INT <= Build.VERSION_CODES.R) {
          if (!moveTaskToBack(false)) {
              // For non-root activities, use the default implementation to finish them.
              super.invokeDefaultOnBackPressed()
          }
          return
      }

      // Use the default back button implementation on Android S
      // because it's doing more than [Activity.moveTaskToBack] in fact.
      super.invokeDefaultOnBackPressed()
  }
}
  

我的MainApplication.kt

 package com.thediamlaundry.diamapp

import android.app.Application
import android.content.res.Configuration

import com.facebook.react.PackageList
import com.facebook.react.ReactApplication
import com.facebook.react.ReactNativeHost
import com.facebook.react.ReactPackage
import com.facebook.react.ReactHost
import com.facebook.react.defaults.DefaultNewArchitectureEntryPoint.load
import com.facebook.react.defaults.DefaultReactNativeHost
import com.facebook.soloader.SoLoader

import expo.modules.ApplicationLifecycleDispatcher
import expo.modules.ReactNativeHostWrapper

class MainApplication : Application(), ReactApplication {

  override val reactNativeHost: ReactNativeHost = ReactNativeHostWrapper(
        this,
        object : DefaultReactNativeHost(this) {
          override fun getPackages(): List<ReactPackage> {
            // Packages that cannot be autolinked yet can be added manually here, for example:
            // packages.add(new MyReactNativePackage());
            return PackageList(this).packages
          }

          override fun getJSMainModuleName(): String = ".expo/.virtual-metro-entry"

          override fun getUseDeveloperSupport(): Boolean = BuildConfig.DEBUG

          override val isNewArchEnabled: Boolean = BuildConfig.IS_NEW_ARCHITECTURE_ENABLED
          override val isHermesEnabled: Boolean = BuildConfig.IS_HERMES_ENABLED
      }
  )

  override val reactHost: ReactHost
    get() = ReactNativeHostWrapper.createReactHost(applicationContext, reactNativeHost)

  override fun onCreate() {
    super.onCreate()
    SoLoader.init(this, false)
    if (BuildConfig.IS_NEW_ARCHITECTURE_ENABLED) {
      // If you opted-in for the New Architecture, we load the native entry point for this app.
      load()
    }
    ApplicationLifecycleDispatcher.onApplicationCreate(this)
  }

  override fun onConfigurationChanged(newConfig: Configuration) {
    super.onConfigurationChanged(newConfig)
    ApplicationLifecycleDispatcher.onConfigurationChanged(this, newConfig)
  }
}  

在从 android studio 构建 AAB 时，因为我已经使用了博览会的免费套餐。

 I got this error > Task :app:compileReleaseKotlin FAILED
e: file:///Users/pratikbhattarai/Documents/GitHub/diamFrontend/diamApp/android/app/src/main/java/com/thediamlaundry/diamapp/MainActivity.kt:18:14 Unresolved reference: R
e: file:///Users/pratikbhattarai/Documents/GitHub/diamFrontend/diamApp/android/app/src/main/java/com/thediamlaundry/diamapp/MainActivity.kt:35:11 Unresolved reference: BuildConfig
e: file:///Users/pratikbhattarai/Documents/GitHub/diamFrontend/diamApp/android/app/src/main/java/com/thediamlaundry/diamapp/MainApplication.kt:31:60 Unresolved reference: BuildConfig
e: file:///Users/pratikbhattarai/Documents/GitHub/diamFrontend/diamApp/android/app/src/main/java/com/thediamlaundry/diamapp/MainApplication.kt:33:52 Unresolved reference: BuildConfig
e: file:///Users/pratikbhattarai/Documents/GitHub/diamFrontend/diamApp/android/app/src/main/java/com/thediamlaundry/diamapp/MainApplication.kt:34:51 Unresolved reference: BuildConfig
e: file:///Users/pratikbhattarai/Documents/GitHub/diamFrontend/diamApp/android/app/src/main/java/com/thediamlaundry/diamapp/MainApplication.kt:44:9 Unresolved reference: BuildConfig 

我已经尝试过 gradle 同步。已使用 ./gradlew clean 命令。它让我构建成功，但是当我尝试构建项目时，它给了我这个错误。我已经检查了所有依赖项，并认为一切都是正确且兼容的。但在构建时我收到此错误

Answer 1

我只是通过添加我的命名空间=“com.thediamlaundry.diamapp”来解决我的问题，它只是命名空间=“com.diamapp”。在应用程序级别 build.gradle 中添加此内容后，我的问题得到了解决