ButterKnife，相信好多人都有用過。
Android studio匯入ButterKnife也很簡單。

1、右鍵專案->open module settings->左側欄點app->選擇Dependencies選項卡->最右邊的[+]->Library Dependency->在彈出的Choose Library Dependency中搜索關鍵詞butterknife，便可以搜尋到ButterKnife最新版本

2、Project的build.gradle檔案中增加classpath，classpath ‘com.neenbedankt.gradle.plugins:android-apt:1.8’

buildscript {
    repositories {
        jcenter()
    }
    dependencies {
        classpath 'com.android.tools.build:gradle:2.0.0'
        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
    }
}

allprojects {
    repositories {
        jcenter()
    }
}

task clean(type: Delete) {
    delete rootProject.buildDir
}

3、在Module的build.gradle檔案中增加plugin

apply plugin: 'com.neenbedankt.android-apt'

4、在app下的build.gradle新增apt ‘com.jakewharton:butterknife-compiler:8.0.1’

compile 'com.jakewharton:butterknife:8.0.1'
apt 'com.jakewharton:butterknife-compiler:8.0.1'

最後，android support library需要更新到23.3.0版本才行。