Cannot resolve symbol default_web_client_id in Firebase's Android Codelab

Question

I am trying to learn Firebase, so I went through the Android Codelab. The project they gave me however, had an error:

Cannot resolve symbol default_web_cl

Answer 1

Generic solution for this is to apply google play services plugin at the end of build.gradle like this

  apply plugin: 'com.android.application'

android {
    compileSdkVersion 30
    buildToolsVersion "30.0.0"

    buildFeatures {
        dataBinding true
    }

    defaultConfig {
        applicationId "xxxxxx"
        minSdkVersion 21
        targetSdkVersion 30
        versionCode 1
        versionName "1.0"
        multiDexEnabled true
        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"])
    implementation 'androidx.appcompat:appcompat:1.2.0'
    implementation 'androidx.constraintlayout:constraintlayout:1.1.3'



    testImplementation 'junit:junit:4.13'
    androidTestImplementation 'androidx.test.ext:junit:1.1.1'
    androidTestImplementation 'androidx.test.espresso:espresso-core:3.2.0'
    // For Common Dimension
    implementation 'com.intuit.sdp:sdp-android:1.0.5'
    implementation 'com.intuit.ssp:ssp-android:1.0.5'
    // Retrofit and Gson
    implementation 'com.google.code.gson:gson:2.8.6'
    implementation 'com.squareup.retrofit2:retrofit:2.6.1'
    implementation 'com.squareup.retrofit2:converter-gson:2.3.0'
    implementation 'com.squareup.retrofit2:converter-scalars:2.6.1'
    // Rx Java and Dagger
    implementation 'com.squareup.retrofit2:adapter-rxjava:2.1.0'
    implementation 'io.reactivex:rxandroid:1.2.1'
    implementation 'io.reactivex:rxjava:1.1.6'

    implementation 'com.google.dagger:dagger:2.24'
    annotationProcessor 'com.google.dagger:dagger-compiler:2.24'
    compileOnly 'javax.annotation:jsr250-api:1.0'
    compileOnly 'org.glassfish:javax.annotation:10.0-b28'
    // Glide Image Loading
    implementation 'com.github.bumptech.glide:glide:4.9.0'
    annotationProcessor 'com.github.bumptech.glide:compiler:4.7.1'
    implementation 'com.android.support:design:30.0.0'
    implementation 'com.android.support:recyclerview-v7:30.0.0'
    implementation 'com.android.support:cardview-v7:30.0.0'
    implementation 'com.android.support:multidex:1.0.3'

    /*Jsoup*/
    implementation 'org.jsoup:jsoup:1.9.1'

    /*Firebase*/
    implementation 'com.google.firebase:firebase-core:17.5.0'
    implementation 'com.google.firebase:firebase-config:19.2.0'
    implementation 'com.google.firebase:firebase-messaging:20.2.4'
    implementation 'com.google.firebase:firebase-database:19.3.1'
    implementation 'com.google.firebase:firebase-auth:19.3.2'
    implementation 'com.firebaseui:firebase-ui-storage:6.2.0'
    implementation 'androidx.constraintlayout:constraintlayout:1.1.3'
    implementation 'com.google.firebase:firebase-analytics:17.5.0'

    /*location and google map*/
    implementation 'com.google.android.gms:play-services-maps:17.0.0'
    implementation 'com.google.android.gms:play-services-location:17.0.0'
    implementation 'com.google.android.gms:play-services-places:17.0.0'
    implementation 'com.google.android.gms:play-services-auth:18.1.0'

    /*Circle Image View*/
    implementation 'de.hdodenhof:circleimageview:3.0.1'
    implementation 'com.github.ittianyu:BottomNavigationViewEx:2.0.4'
    implementation "com.android.support:design:30.0.0"
    implementation 'com.facebook.android:facebook-android-sdk:5.15.3'

}

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