Error: cannot find symbol class/variable “TransportMediator”

Question

i'm having an issue with my code when i try to run the app these errors shows up but i really don't know how to solve this all the dependencies Update tried to clean rebuild and validate chache but nothing happened here is the gradle file and the project gradle of the app any help is appreciated

 buildscript { repositories { jcenter() google() } dependencies { classpath 'com.android.tools.build:gradle:3.0.1' classpath 'com.google.gms:google-services:3.2.0' // NOTE: Do not place your application dependencies here; they belong // in the individual module build.gradle files } } allprojects { repositories { jcenter() maven { url 'https://jitpack.io' } maven { url 'https://maven.google.com' } } } task clean(type: Delete) { delete rootProject.buildDir } 

 apply plugin: 'com.android.application' android { compileSdkVersion 27 buildToolsVersion "27.0.3" defaultConfig { applicationId "com.amiapp.videodownloader" minSdkVersion 15 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 { compile fileTree(dir: 'libs', include: ['*.jar']) androidTestCompile('com.android.support.test.espresso:espresso-core:3.0.1', { exclude group: 'com.android.support', module: 'support-annotations' }) compile files('libs/glide-3.6.0.jar') compile 'com.android.support:appcompat-v7:27.0.2' compile 'com.android.support.constraint:constraint-layout:1.0.2' compile 'com.android.support:design:27.0.2' compile 'com.google.android.gms:play-services-ads:11.8.0' compile 'com.google.firebase:firebase-core:11.8.0' compile 'com.google.firebase:firebase-messaging:11.8.0' compile 'com.google.firebase:firebase-crash:11.8.0' compile 'com.android.support:cardview-v7:27.0.2' compile 'com.android.support:recyclerview-v7:27.0.2' compile 'com.github.turhanoz:reactivedirectorychooser:2.0.1' compile 'com.timqi.sectorprogressview:library:2.0.1' compile 'com.geniusforapp.fancydialog:FancyDialog:0.1.0' testCompile 'junit:junit:4.12' } apply plugin: 'com.google.gms.google-services' 

Error:(10, 32) error: cannot find symbol class TransportMediator

Error:(98, 31) error: cannot find symbol variable TransportMediator

Answer 1

TransportMediator can be found in the v4 Support Library .

Include 'compile com.android.support:support-v4:27.0.2' in your module-level build.gradle file.