Butterknife 8.4.0 - plugin with id 'android-apt' not found

Question

I keep getting the Plugin with id 'android-apt' not found error. What's going on here?

 plugins { id "me.tatarka.retrolambda" version "3.2.5" } apply plugin: 'com.android.application' apply plugin: 'android-apt' android { compileSdkVersion 24 buildToolsVersion '23.0.3' dexOptions { javaMaxHeapSize "6g" } defaultConfig { applicationId "com.yitter.android" minSdkVersion 15 targetSdkVersion 24 multiDexEnabled true // Enabling multidex support. renderscriptTargetApi 23 renderscriptSupportModeEnabled true } buildTypes { release { minifyEnabled false //runProguard false //proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.txt' } } compileOptions { sourceCompatibility JavaVersion.VERSION_1_8 targetCompatibility JavaVersion.VERSION_1_8 } } repositories { mavenCentral() maven { url "https://jitpack.io" } } dependencies { //NeuMob compile 'com.neumob:neumob-android:2.3.7' // Material Design Navigation Drawer compile('com.mikepenz:materialdrawer: 5.3.6@aar ') { transitive = true } // Crop Image compile 'com.theartofdev.edmodo:android-image-cropper:2.2.+' // Material Design Font Icons compile "com.mikepenz:iconics-core: 2.7.1@aar " compile "com.android.support:appcompat-v7:24.1.1" compile 'com.mikepenz:google-material-typeface: 2.2.0.2.original@aar ' compile 'com.mikepenz:material-design-iconic-typeface: 2.2.0.2@aar ' compile 'com.mikepenz:fontawesome-typeface: 4.6.0.2@aar ' //Facebook Audience Network compile 'com.facebook.android:audience-network-sdk:4.13.0' compile 'com.bartoszlipinski:recyclerviewheader2:2.0.1' compile 'com.ms-square:etsyblur:0.1.3' compile 'com.android.support:appcompat-v7:24.0.0' // recyclerview compile 'com.android.support:recyclerview-v7:24.0.0' // material design compile 'com.android.support:design:24.0.0' // google analytics compile 'com.google.android.gms:play-services-analytics:8.4.0' // paypal purchasing todo change to 'compile' (2k more methods..?) compile files('libs/PayPalAndroidSDK-2.7.1.jar') // Module dependency on ParseLoginUI library sources compile project(':ParseLoginUI') // Consider using these in future - Wes Feb 2016 //compile 'com.parse:parseui-login-android:0.0.1' //compile 'com.parse:parseui-widget-android:0.0.1' // Parse compile 'com.parse:parse-android:1.13.0' compile 'com.parse:parsetwitterutils-android:1.10.5' compile 'com.parse:parsefacebookutils-v4-android: 1.10.4@aar ' // excluding bolts-android because parse-android uses bolts-tasks which conflicts // hint: use 'gradlew app:dependencies' to inspect compile('com.facebook.android:facebook-android-sdk:4.14.0') { exclude module: 'bolts-android' exclude module: 'bolts-tasks' } // Butterknife compile 'com.jakewharton:butterknife:8.4.0' apt 'com.jakewharton:butterknife-compiler:8.4.0' // AppRater compile files('libs/AppRater.jar') // retrofit http api compile 'com.squareup.retrofit2:retrofit:2.0.0-beta4' compile 'com.squareup.retrofit2:adapter-rxjava:2.0.0-beta4' compile 'com.squareup.retrofit2:converter-gson:2.0.0-beta4' compile 'com.squareup.okhttp3:logging-interceptor:3.0.1' // reactivex compile 'io.reactivex:rxjava:1.1.6' compile 'io.reactivex:rxandroid:1.2.1' // picasso image loading compile 'com.squareup.picasso:picasso:2.5.2' // stripe for payment processing compile 'com.stripe:stripe-android:1.0.4' } 

Answer 1

According to Butter Knife readme you need

 buildscript { repositories { mavenCentral() } dependencies { classpath 'com.neenbedankt.gradle.plugins:android-apt:1.8' } } 

in the build.gradle file in the root directory of your Android Studio project.

Answer 2

Add

  classpath 'com.neenbedankt.gradle.plugins:android-apt:1.8' 

in dependencies in the top-level file (project) build.gradle .

Answer 3

  dependencies { classpath 'com.android.tools.build:gradle:3.0.1' classpath "org.jetbrains.kotlin:kotlin-gradle-plugin:$kotlin_version" classpath 'me.tatarka:gradle-retrolambda:3.1.0' classpath 'org.robolectric:robolectric-gradle-plugin:1.0.1' classpath 'com.neenbedankt.gradle.plugins:android-apt:1.8' } 

---

  apply plugin: 'com.android.application' 

apply plugin: 'kotlin-android'

apply plugin: 'kotlin-android-extensions'

apply plugin: 'me.tatarka.retrolambda'

---

  compileOptions { sourceCompatibility JavaVersion.VERSION_1_8 targetCompatibility JavaVersion.VERSION_1_8 } 

---

  retrolambdaConfig 'net.orfjackal.retrolambda:retrolambda:2.4.0'