未解决的引用：当我运行应用程序时，.setCredentials。

Question

请帮助我解决这个问题，当我运行应用程序时，我每次都得到 "Unresolved reference: .setCredentials"，我在编译时没有这个问题。

我认为这个问题只是在程序运行时发生，当程序真正寻找librairy的时候。

Iam blocked several day in this problem, please help meThank you very mutch!

主要活动

import android.os.Bundle
import android.util.Log
import androidx.appcompat.app.ActionBar
import androidx.appcompat.app.AppCompatActivity
import androidx.fragment.app.Fragment
import com.google.android.gms.tasks.OnSuccessListener
import com.google.android.material.bottomnavigation.BottomNavigationView
import com.google.auth.oauth2.GoogleCredentials
import com.google.firebase.FirebaseApp
import com.google.firebase.FirebaseOptions
import com.google.firebase.storage.FirebaseStorage
import com.google.firebase.storage.StorageReference
import java.io.FileInputStream

    fun getConfig(){
        val serviceAccount = FileInputStream("serviceAccountKey.json")
        val options: FirebaseOptions = FirebaseOptions.Builder()
            .setCredentials(GoogleCredentials.fromStream(serviceAccount))
            .setDatabaseUrl("https://mybucket.firebaseio.com")
            .build()
        FirebaseApp.initializeApp(options)
    }

**Builde gradle level projet**

// Top-level build file where you can add configuration options common to all sub-projects/modules.
buildscript {
    ext.kotlin_version = '1.3.61'
    repositories {
        google()
        jcenter()     
    }
dependencies {
        classpath 'com.android.tools.build:gradle:3.6.3'
        classpath "org.jetbrains.kotlin:kotlin-gradle-plugin:$kotlin_version"
        classpath 'com.google.gms:google-services:4.3.3'
        // NOTE: Do not place your application dependencies here; they belong
        // in the individual module build.gradle files
    }
}
allprojects {
    repositories {
        google()
        jcenter()
        mavenCentral()      
    }
}
task clean(type: Delete) {
    delete rootProject.buildDir
}

**Build gradle level app**

apply plugin: 'com.android.application'
apply plugin: 'com.google.gms.google-services'
apply plugin: 'kotlin-android'
apply plugin: 'kotlin-android-extensions'
android {
    compileSdkVersion 29
    buildToolsVersion "29.0.3"
    androidExtensions {
        experimental = true
    }
    packagingOptions {
        exclude 'META-INF/DEPENDENCIES'
    }
    defaultConfig {
        applicationId "com.prod.myapp"
        minSdkVersion 16
        targetSdkVersion 29
        versionCode 1
        versionName "1.0"
        testInstrumentationRunner "androidx.test.runner.AndroidJUnitRunner"
    }
    buildTypes {
        release {
            minifyEnabled false
            proguardFiles getDefaultProguardFile('proguard-android-optimize.txt'), 'proguard-rules.pro'
        }
    }
}
dependencies {
    implementation fileTree(dir: 'libs', include: ['*.jar'])<br>
    implementation "org.jetbrains.kotlin:kotlin-stdlib-jdk7:$kotlin_version"<br>
    implementation 'androidx.appcompat:appcompat:1.1.0'<br>
    implementation 'androidx.recyclerview:recyclerview:1.1.0'<br>
    implementation "androidx.cardview:cardview:1.0.0"<br>
    implementation 'androidx.core:core-ktx:1.2.0'<br>
    implementation 'androidx.constraintlayout:constraintlayout:1.1.3'<br>
    implementation 'com.google.android.material:material:1.1.0'<br>
    implementation 'androidx.legacy:legacy-support-v4:1.0.0'<br>
    testImplementation 'junit:junit:4.12'<br>
    androidTestImplementation 'androidx.test.ext:junit:1.1.1'<br>
    androidTestImplementation 'androidx.test.espresso:espresso-core:3.2.0'<br>
   // implementation 'com.google.firebase:firebase-core:17.4.1'<br>
    implementation 'com.google.firebase:firebase-storage:19.1.1'<br>
  //  implementation 'org.jetbrains.kotlinx:kotlinx-serialization-runtime-native:0.9.1'<br>
    implementation 'com.google.firebase:firebase-admin:6.13.0'<br>
   // implementation 'com.google.firebase:firebase-auth:19.3.1'<br>
}