之前官网的配置一直有问题，留个配置信息以便参考
1.首先主build.gradle目录添加插件
buildscript {
repositories {
jcenter()
}
dependencies {
classpath 'com.android.tools.build:gradle:2.2.2'
classpath 'com.neenbedankt.gradle.plugins:android-apt:1.8'
// NOTE: Do not place your application dependencies here; they belong
// in the individual module build.gradle files
}
}
2.在应用目录build.gradle下应用插件
apply plugin: 'com.android.application'
apply plugin: 'android-apt'
再添加黄油刀依赖和插件依赖
compile 'com.jakewharton:butterknife:8.4.0'
apt 'com.jakewharton:butterknife-compiler:8.4.0'