java - 为什么它说无法解析符号身份验证？

Question

我的 firebase-auth 依赖项是最新版本，但 Android Studio 将“auth”显示为错误。我该如何解决这个问题？

这是我的 build.gradle(:app) 文件：

apply plugin: 'com.android.application'

android {
  compileSdkVersion 30
  defaultConfig {
    applicationId "com.xyz.shop"
    minSdkVersion 20
    targetSdkVersion 30
    versionCode 1
    versionName "1.0.1"
    testInstrumentationRunner "androidx.test.runner.AndroidJUnitRunner"
    vectorDrawables.useSupportLibrary = true
    multiDexEnabled true
  }
  buildTypes {
    release {
        minifyEnabled false
        proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro', 'proguard-rules-new.pro'
    }
  }

 }
dependencies {
implementation 'com.google.firebase:firebase-core:20.0.0'
implementation 'com.google.firebase:firebase-messaging:23.0.0'
implementation 'com.google.firebase:firebase-auth:21.0.1'
implementation 'com.google.android.gms:play-services-auth:18.1.0'
implementation "com.google.android.gms:play-services-gcm:17.0.0"
implementation 'com.google.android.gms:play-services-maps:17.0.0'
implementation 'com.google.android.libraries.places:places:2.3.0'


implementation 'org.jetbrains:annotations-java5:15.0'
}
apply plugin: 'com.google.gms.google-services'

标签： javaandroidfirebasefirebase-authentication