一、打开Project的build.gradle文件，修改buildscript，添加
classpath ‘com.neenbedankt.gradle.plugins:android-apt:1.8’
添加之后代码如下：
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
}
二、打开Module的build.gradle文件，添加
applyplugin:'android-apt'
添加之后代码如下：
apply plugin: 'com.android.application'
apply plugin: 'android-apt'
三、Module的build.gradle文件dependencies中添加
apt'com.jakewharton:butterknife-compiler:8.2.1'
添加之后代码如下：
dependencies {
compile fileTree(include: ['*.jar'], dir: 'libs')testCompile 'junit:junit:4.12'
compile 'com.android.support:appcompat-v7:23.1.1'
compile 'com.jakewharton:butterknife:8.2.1'
compile 'com.android.support:design:23.1.1'
compile files('libs/Android_RTCM_SDK_v1.0.6_rtk_15.jar')
compile 'com.google.android.gms:play-services-appindexing:8.1.0'
compile files('libs/nagrand-jar-with-dependencies.jar')
apt 'com.jakewharton:butterknife-compiler:8.2.1'
}
