title: Could not find ButterKnife compiler
body: <p>I integrated ButterKnife into my project, since then it has been impossible for me to build it</p>
  
  <p>I've tried different versions of the library but nothing seems to work</p>
  
  <p>Here is the error during the build:</p>
  
  <pre><code>Could not find com.jakewharton:butterknife-compiler:7.0.1.
  Searched in the following locations:
    - https://dl.google.com/dl/android/maven2/com/jakewharton/butterknife-compiler/7.0.1/butterknife-compiler-7.0.1.pom
    - https://dl.google.com/dl/android/maven2/com/jakewharton/butterknife-compiler/7.0.1/butterknife-compiler-7.0.1.jar
    - https://jcenter.bintray.com/com/jakewharton/butterknife-compiler/7.0.1/butterknife-compiler-7.0.1.pom
    - https://jcenter.bintray.com/com/jakewharton/butterknife-compiler/7.0.1/butterknife-compiler-7.0.1.jar
    - https://jitpack.io/com/jakewharton/butterknife-compiler/7.0.1/butterknife-compiler-7.0.1.pom
    - https://jitpack.io/com/jakewharton/butterknife-compiler/7.0.1/butterknife-compiler-7.0.1.jar
  Required by:
      project :app
  </code></pre>
  
  <p>And this is my build.gradle file:</p>
  
  <pre><code>apply plugin: 'com.android.application'
  
  android {
      compileSdkVersion 28
      defaultConfig {
          applicationId "com.example.toto"
          minSdkVersion 19
          targetSdkVersion 28
          versionCode 1
          versionName "1.0"
          testInstrumentationRunner "android.support.test.runner.AndroidJUnitRunner"
          vectorDrawables.useSupportLibrary = true
      }
      buildTypes {
          release {
              minifyEnabled false
              proguardFiles getDefaultProguardFile('proguard-android-optimize.txt'), 'proguard-rules.pro'
          }
      }
  }
  
  dependencies {
      implementation fileTree(dir: 'libs', include: ['*.jar'])
  
      //Retrofit Dependencies
      implementation 'com.squareup.retrofit2:retrofit:2.5.0'
      implementation 'com.squareup.retrofit2:converter-gson:2.5.0'
  
      // Butter Knife
      implementation 'com.jakewharton:butterknife:7.0.1'
      implementation 'com.android.support:support-annotations:28.0.0'
      annotationProcessor 'com.jakewharton:butterknife-compiler:7.0.1'
  
      // ZXing
      implementation 'com.github.tobrun:QR-Vision-Fragment:master-SNAPSHOT'
  
      implementation 'com.android.support:appcompat-v7:28.0.0'
      implementation 'com.android.support:support-vector-drawable:28.0.0'
      implementation 'com.android.support.constraint:constraint-layout:1.1.3'
      implementation 'android.arch.lifecycle:extensions:1.1.1'
      implementation 'com.android.support:design:28.0.0'
      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.android.support:recyclerview-v7:28.0.0'
      implementation 'com.android.support:cardview-v7:28.0.0'
  }
  </code></pre>
  
  <p>I have already added the jitpack repositories in the project build.gradle:</p>
  
  <pre><code>allprojects {
      repositories {
          google()
          jcenter()
          maven { url 'https://jitpack.io' }
  
      }
  }
  </code></pre>