任务 '：app：compileDebugJavaWithJavac' 的执行失败。适用于 Android 的 React Native 应用程序

Question

我正在尝试从我的 React Native 应用程序启动 android 模拟器，但是，它抛出以下错误并且模拟器无法在我的 MAC 系统中启动。

错误是

    Configure project :app
     WARNING: Configuration 'compile' is obsolete and has been replaced with 'implementation' and 'api'.
     It will be removed at the end of 2018. For more information see: http://d.android.com/r/tools/update-dependency-configurations.html
     Configure project :react-native-app
     WARNING: Configuration 'compile' is obsolete and has been replaced with 'implementation' and 'api'.
     It will be removed at the end of 2018. For more information see: http://d.android.com/r/tools/update-dependency-configurations.html
     WARNING: Configuration 'testCompile' is obsolete and has been replaced with 'testImplementation' and 'testApi'.
     It will be removed at the end of 2018. For more information see: http://d.android.com/r/tools/update-dependency-configurations.html
    WARNING: Configuration 'testApi' is obsolete and has been replaced with 'testImplementation'.
     It will be removed at the end of 2018. For more information see: http://d.android.com/r/tools/update-dependency-configurations.html
      Configure project :react-native-version-number
     WARNING: Configuration 'compile' is obsolete and has been replaced with 'implementation' and 'api'.
     It will be removed at the end of 2018. For more information see: http://d.android.com/r/tools/update-dependency-configurations.html
     WARNING: The specified Android SDK Build Tools version (23.0.1) is ignored, as it is below the minimum supported version (27.0.3) for
 Android Gradle Plugin 3.1.4.
     Android SDK Build Tools 27.0.3 will be used.
     To suppress this warning, remove "buildToolsVersion '23.0.1'" from your build.gradle file, as each version of the Android Gradle Plugin
 now has a default version of the build tools.
     Download https://dl.google.com/dl/android/maven2/com/android/support/multidex/1.0.2/multidex-1.0.2.pom
     Download https://dl.google.com/dl/android/maven2/com/android/support/multidex/1.0.2/multidex-1.0.2.aar
      Task :app:compileDebugJavaWithJavac FAILED
     /Users/anilkumar/Documents/projectName/android/app/src/main/java/com/projectName/MainApplication.java:19:
 error: cannot find symbol
           return BuildConfig.DEBUG;
                  ^
       symbol: variable BuildConfig
     1 error

My build.gradle file

顶级构建文件，您可以在其中添加所有子项目/模块通用的配置选项。

    buildscript {
        ext {
            buildToolsVersion = "27.0.3"
            minSdkVersion = 16
            compileSdkVersion = 27
            targetSdkVersion = 26
            supportLibVersion = "27.1.1"
        }
        repositories {
            google()
            jcenter()
        }
        dependencies {
            classpath 'com.android.tools.build:gradle:3.1.4'
            // NOTE: Do not place your application dependencies here; they belong
            // in the individual module build.gradle files
        }
    }
    allprojects {
        repositories {
            mavenLocal()
            google()
            jcenter()
            maven {
                // All of React Native (JS, Obj-C sources, Android binaries) is installed from npm
                url "$rootDir/../node_modules/react-native/android"
            }
        }
    }

    task wrapper(type: Wrapper) {
        gradleVersion = '4.4'
        distributionUrl = distributionUrl.replace("bin", "all")
    }

我是 React Native 的新手，谁能建议我如何解决这个问题？

Answer 1

最后，我通过添加以下代码找到了答案

MainApplication.java中的导入语句：

import com.facebook.react.BuildConfig;

在以下链接中找到答案

React Native Android Build Error MainActivity.java：29： error： 找不到符号