Android ButterKnife8.2.1 使用

最近在工做中使用最新版的ButterKnife8.2.1 结果发现 完全不能使用，是可以编译，也可以运行，但是就是没有找到
Id ，出现空指针。

ButterKnife GitHub 官网地址https://github.com/JakeWharton/butterknife/

以下有两种使用方式，第一种是在正常的Module和 使用Libray

官网中有介绍新版本的使用方法

Download

Configure your project-level build.gradle to include the ‘android-apt’ plugin:
buildscript {
repositories {
mavenCentral()
}
dependencies {
classpath ‘com.neenbedankt.gradle.plugins:android-apt:1.8’
}
}
Then, apply the ‘android-apt’ plugin in your module-level build.gradle and add the Butter Knife dependencies:
apply plugin: ‘android-apt’
…
android {
}
dependencies {
compile ‘com.jakewharton:butterknife:8.2.1’
apt ‘com.jakewharton:butterknife-compiler:8.2.1’
}
Note: If you are using the new Jack compiler with version 2.2.0 or newer you do not need the ‘android-apt’
plugin and can instead replace apt with annotationProcessor when declaring the compiler dependency.

Library projects

To use Butter Knife in a library, add the plugin to your buildscript:

buildscript {
repositories {
mavenCentral()
}
dependencies {
classpath ‘com.jakewharton:butterknife-gradle-plugin:8.2.1’
}
}
and then apply it in your module:

apply plugin: ‘com.android.library’
apply plugin: ‘com.jakewharton.butterknife’

实践使用

Android Project中有有两个build.gradle 文件
* project-level build.gradle
* module-level build.gradle

project-level build.gradle 配置

buildscript {
repositories {
mavenCentral()
}
dependencies {
classpath ‘com.neenbedankt.gradle.plugins:android-apt:1.8’
}
}

module-level build.gradle 配置

apply plugin: ‘android-apt’

android {
…
}

dependencies {
compile ‘com.jakewharton:butterknife:8.2.1’
apt ‘com.jakewharton:butterknife-compiler:8.2.1’
}