Android 导入语句中的错误无法解析符号FirebaseAuth

在导入语句中，

Firebase

以红色突出显示

执行

清理并重建项目后

错误未得到解决。依赖项添加到

build.gradle

中，但仍然没有发生任何事情 请帮忙

apply plugin: 'com.android.application'
android {
    compileSdkVersion 27
    defaultConfig {
        applicationId "com.example.admin.myapp"
        minSdkVersion 16
        targetSdkVersion 27
        versionCode 1
        versionName "1.0"
        testInstrumentationRunner "android.support.test.runner.AndroidJUnitRunner"
    }
    buildTypes {
        release {
            minifyEnabled false
            proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro'
        }
    }
}

dependencies {
    implementation fileTree(include: ['*.jar'], dir: 'libs')
    implementation 'com.android.support:appcompat-v7:27.1.1'
    implementation 'com.android.support:palette-v7:27.1.1'
    implementation 'com.android.support:design:27.1.1'
    implementation 'com.android.support:customtabs:27.1.1'
    implementation 'com.android.support:cardview-v7:27.1.1'
    implementation 'com.android.support.constraint:constraint-layout:1.1.2'
    testImplementation 'junit:junit:4.12'
    androidTestImplementation 'com.android.support.test:runner:1.0.2'
    androidTestImplementation 'com.android.support.test.espresso:espresso-core:3.0.2'
    implementation 'com.google.firebase:firebase-core:16.0.1'
    implementation 'com.google.firebase:firebase-database:16.0.1'
    implementation 'com.firebaseui:firebase-ui:2.0.1'
    implementation 'com.firebaseui:firebase-ui-auth:2.0.1'
    implementation 'com.android.support:recyclerview-v7:27.1.1'
    implementation 'de.hdodenhof:circleimageview:2.2.0'
    implementation 'com.google.firebase:firebase-auth:16.0.2'
    implementation 'com.firebaseui:firebase-ui:2.0.1'



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

---

这是我的build.gradle文件

将此添加到您的

build.gradle

implementation com.google.firebase:firebase-auth:16.0.2

---

向我们提供您的buid.gradley您可能没有添加所需的libpost your build.gradle现在已发布我的build.gradle文件然后转到文件->无效缓存/重新启动并重新启动并清除缓存希望有帮助