Gradle DSL method not found: 'apt()'

Question

I am trying to add the latest version of butterknife and I get this error from gradle:

Error:(31, 0) Gradle DSL method not found: 'apt()' Possible causes:

The project 'MyProject' may be using a version of Gradle that does not contain the method. Gradle settings

The build file may be missing a Gradle plugin. Apply Gradle plugin

Where my gradle mobile build.gradle is:

plugins {
    id "net.ltgt.apt" version "0.6"
}

apply plugin: 'com.android.application'

android {
    compileSdkVersion 23
    buildToolsVersion "23.0.2"

    defaultConfig {
        applicationId "com.mynamspace.myproject"
        minSdkVersion 19
        targetSdkVersion 23
        versionCode 1
        versionName "1.0"
    }
    buildTypes {
        release {
            minifyEnabled false
            proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro'
        }
    }
}

dependencies {
    compile fileTree(dir: 'libs', include: ['*.jar'])
    wearApp project(':wear')
    testCompile 'junit:junit:4.12'
    compile 'com.jakewharton:butterknife:8.0.0'
    apt 'com.jakewharton:butterknife-compiler:8.0.0'
    compile 'com.android.support:appcompat-v7:23.3.0'
    compile 'com.google.android.gms:play-services:8.4.0'
    compile 'com.android.support:design:23.3.0'
    compile 'com.android.support:support-v4:23.3.0'
    compile 'com.android.support:recyclerview-v7:23.3.0'
}

What's wrong with the gradle-apt-plugin?

Answer 1

It's entirely possible that there's a way to get your plugins to work. Given your error, I'd start by following what the ButterKnife project uses, get that working, then see if there is a recipe for what you're trying.

First, in your top-level build.gradle file, include classpath 'com.neenbedankt.gradle.plugins:android-apt:1.8' in the buildscript dependencies, such as:

  buildscript {
    repositories {
      mavenCentral()
    }
    dependencies {
      classpath 'com.android.tools.build:gradle:2.0.0'
      classpath 'com.neenbedankt.gradle.plugins:android-apt:1.8'
    }
  }

Then, in your module's build.gradle file, include apply plugin: 'com.neenbedankt.android-apt' towards the top.

The links are to the relevant files from the ButterKnife GitHub repo, from the project and the dedicated sample app.