错误：无法确定当前字符，它不是字符串、数字、数组或对象在react-native for android中。

每当我在保持模拟器运行的同时运行`react-native run-android`时，我会遇到这个错误。`react-native run-ios`没有问题。

错误信息中指出，我尝试运行`npm uninstall -g react-native react-native-cli`，但没有起作用。

关于我的环境信息：

系统：

操作系统：macOS 10.15

CPU：(4) x64 Intel(R) Core(TM) i5-7360U CPU @ 2.30GHz

内存：29.68 MB / 8.00 GB

Shell：3.2.57 - /bin/bash

二进制文件：

Node：12.13.0 - /usr/local/bin/node

Yarn：1.19.1 - /usr/local/bin/yarn

npm：6.12.0 - /usr/local/bin/npm

Watchman：4.9.0 - /usr/local/bin/watchman

SDK：

iOS SDK：

平台：iOS 13.0，DriverKit 19.0，macOS 10.15，tvOS 13.0，watchOS 6.0

IDE：

Android Studio：3.5 AI-191.8026.42.35.5977832

Xcode：11.0/11A420a - /usr/bin/xcodebuild

npm包：

react：16.9.0 => 16.9.0

react-native：^0.61.4 => 0.61.4

npm全局包：

react-native-cli：2.0.1

android/app/build.gradle如下：

应用插件："com.android.application"

import com.android.build.OutputFile

project.ext.react = [

entryFile: "index.js",

enableHermes: false, // 如果更改，请清除并重新构建

]

apply from: "../../node_modules/react-native/react.gradle"

def enableSeparateBuildPerCPUArchitecture = false

def enableProguardInReleaseBuilds = false

def jscFlavor = 'org.webkit:android-jsc:+'

def enableHermes = project.ext.react.get("enableHermes", false);

android {

compileSdkVersion rootProject.ext.compileSdkVersion

compileOptions {

sourceCompatibility JavaVersion.VERSION_1_8

targetCompatibility JavaVersion.VERSION_1_8

}

defaultConfig {

applicationId "com.realyze"

minSdkVersion 21

targetSdkVersion rootProject.ext.targetSdkVersion

versionCode 1

versionName "1.0"

multiDexEnabled true

}

splits {

abi {

reset()

enable enableSeparateBuildPerCPUArchitecture

universalApk false // 如果为真，还会生成通用APK

include "armeabi-v7a", "x86", "arm64-v8a", "x86_64"

}

}

signingConfigs {

debug {

storeFile file('debug.keystore')

storePassword 'android'

keyAlias 'androiddebugkey'

keyPassword 'android'

}

}

buildTypes {

debug {

signingConfig signingConfigs.debug

}

release {

// 注意！在生产环境中，您需要生成自己的密钥库文件。

// 参见https://facebook.github.io/react-native/docs/signed-apk-android。

signingConfig signingConfigs.debug

minifyEnabled enableProguardInReleaseBuilds

proguardFiles getDefaultProguardFile("proguard-android.txt"), "proguard-rules.pro"

}

}

applicationVariants.all { variant ->

variant.outputs.each { output ->

def versionCodes = ["armeabi-v7a": 1, "x86": 2, "arm64-v8a": 3, "x86_64": 4]

def abi = output.getFilter(OutputFile.ABI)

if (abi != null) {

output.versionCodeOverride =

versionCodes.get(abi) * 1048576 + defaultConfig.versionCode

}

}

}

}

dependencies {

implementation project(':react-native-push-notification')

implementation project(':react-native-sound')

implementation project(':react-native-audio')

implementation 'com.android.support:multidex:2.0.1'

implementation project(':react-native-gesture-handler')

implementation fileTree(dir: "libs", include: ["*.jar"])

implementation "com.facebook.react:react-native:+" // 从node_modules中获取

implementation 'androidx.appcompat:appcompat:1.1.0-rc01'

implementation 'androidx.swiperefreshlayout:swiperefreshlayout:1.1.0-alpha02'

implementation 'com.google.firebase:firebase-analytics:17.2.0'

implementation 'com.google.firebase:firebase-auth:19.1.0'

implementation project(path: ":@react-native-firebase_auth")

implementation project(path: ":@react-native-firebase_messaging")

implementation project(path: ":@react-native-firebase_database")

implementation project(':react-native-datetimepicker')

implementation project(path: ":@react-native-firebase_firestore")

implementation project(path: ":@react-native-firebase_functions")

}

if (enableHermes) {

def hermesPath = "../../node_modules/hermes-engine/android/";

debugImplementation files(hermesPath + "hermes-debug.aar")

releaseImplementation files(hermesPath + "hermes-release.aar")

} else {

implementation jscFlavor

}

task copyDownloadableDepsToLibs(type: Copy) {

from configurations.compile

into 'libs'

}

apply from: file("../../node_modules/@react-native-community/cli-platform-android/native_modules.gradle"); applyNativeModulesAppBuildGradle(project)

apply plugin: 'com.google.gms.google-services'

android/build.gradle如下：

buildscript {

ext {

buildToolsVersion = "28.0.3"

minSdkVersion = 16

compileSdkVersion = 28

targetSdkVersion = 28

}

repositories {

google()

jcenter()

}

dependencies {

classpath "com.android.tools.build:gradle:3.4.2"

classpath 'com.google.gms:google-services:4.3.2'

}

}

allprojects {

repositories {

mavenLocal()

maven {

url("$rootDir/../node_modules/react-native/android")

}

maven {

url("$rootDir/../node_modules/jsc-android/dist")

}

google()

jcenter()

maven { url 'https://jitpack.io' }

}

}

最初我遇到了这个错误：react-native build error: Could not find method implementation() for arguments [jscFlavor] on project ':app' of type org.gradle.api.Project，但现在我遇到了上述错误。