Question

我正在使用React Native开发一个应用程序，其中我试图在本地存储中创建一个文件并在该文件上编写。

但是由于以下错误，我无法构建项目

任务：app：compileDebugJavaWithJavac FAILED失败 F：\ ReactNativeWorkspace \ MyFirstProject \ android \ app \ src \ main \ java \ com \ myfirstproject \ MainApplication.java：5：错误：找不到符号导入com.facebook.react.ReactApplication; ^ 符号：类ReactApplication 位置：包com.facebook.react F：\ ReactNativeWorkspace \ MyFirstProject \ android \ app \ src \ main \ java \ com \ myfirstproject \ MainApplication.java：8：错误：找不到符号导入com.facebook.react.ReactNativeHost; ^ 符号：类ReactNativeHost 位置：包com.facebook.react F：\ ReactNativeWorkspace \ MyFirstProject \ android \ app \ src \ main \ java \ com \ myfirstproject \ MainApplication.java：16：错误：找不到符号公共类MainApplication扩展应用程序实现ReactApplication { ^ 符号：类ReactApplication F：\ ReactNativeWorkspace \ MyFirstProject \ android \ app \ src \ main \ java \ com \ myfirstproject \ MainApplication.java：18：错误：找不到符号私有最终ReactNativeHost mReactNativeHost =新的ReactNativeHost（this）{ ^ 符号：类ReactNativeHost 位置：类MainApplication F：\ ReactNativeWorkspace \ MyFirstProject \ android \ app \ src \ main \ java \ com \ myfirstproject \ MainApplication.java：42：错误：找不到符号公共ReactNativeHost getReactNativeHost（）{ ^ 符号：类ReactNativeHost 位置：类MainApplication F：\ ReactNativeWorkspace \ MyFirstProject \ android \ app \ src \ main \ java \ com \ myfirstproject \ MainActivity.java：5：错误：MainActivity不是抽象的，并且不会覆盖ReactActivity中的抽象方法getPackages（）公共类MainActivity扩展了ReactActivity { ^ F：\ ReactNativeWorkspace \ MyFirstProject \ android \ app \ src \ main \ java \ com \ myfirstproject \ MainApplication.java：18：错误：找不到符号私有最终ReactNativeHost mReactNativeHost =新的ReactNativeHost（this）{ ^ 符号：类ReactNativeHost 位置：类MainApplication F：\ ReactNativeWorkspace \ MyFirstProject \ android \ app \ src \ main \ java \ com \ myfirstproject \ MainApplication.java：41：错误：方法未覆盖或从超类型实现方法 @Override ^ 8个错误

我的build.gradle文件..

android {
    compileSdkVersion rootProject.ext.compileSdkVersion
    buildToolsVersion rootProject.ext.buildToolsVersion

    defaultConfig {
        applicationId "com.myfirstproject"
        minSdkVersion rootProject.ext.minSdkVersion
        targetSdkVersion rootProject.ext.targetSdkVersion
        versionCode 1
        versionName "1.0"
        ndk {
            abiFilters "armeabi-v7a", "x86"
        }
    }
    splits {
        abi {
            reset()
            enable enableSeparateBuildPerCPUArchitecture
            universalApk false  // If true, also generate a universal APK
            include "armeabi-v7a", "x86"
        }
    }
    buildTypes {
        release {
            minifyEnabled enableProguardInReleaseBuilds
            proguardFiles getDefaultProguardFile("proguard-android.txt"), "proguard-rules.pro"
        }
    }
    // applicationVariants are e.g. debug, release
    applicationVariants.all { variant ->
        variant.outputs.each { output ->
            // For each separate APK per architecture, set a unique version code as described here:
            // http://tools.android.com/tech-docs/new-build-system/user-guide/apk-splits
            def versionCodes = ["armeabi-v7a":1, "x86":2]
            def abi = output.getFilter(OutputFile.ABI)
            if (abi != null) {  // null for the universal-debug, universal-release variants
                output.versionCodeOverride =
                        versionCodes.get(abi) * 1048576 + defaultConfig.versionCode
            }
        }
    }
}

    dependencies {
          compile project(':react-native-fs')
       // compile project(':react-native-filesystem')
         compile project(':react-native-check-app-install')
     //  compile project(':react-native-cardview')
          implementation fileTree(dir: "libs", include: ["*.jar"])
         implementation "com.android.support:appcompatv7:${rootProject.ext.supportLibVersion}"
          implementation "com.facebook.react:react-native:+"  // From node_modules
     }

获取错误构建失败，出现异常

0 个答案: