解决ButterKnife在library中引用时主model(app)无法使用(注解无效)

问题描述:

  在使用butteknife时,如果将其引用放在library包中,在主model下进行注解会发现注解无效,记录一下解决的办法(以最新版为例)

官方给出的引用方式:

project:

buildscript {
  repositories {
    mavenCentral()
   }
  dependencies {
    classpath 'com.jakewharton:butterknife-gradle-plugin:8.8.1'
  }
}

model(在本文中即是library的model):

apply plugin: 'com.android.library'
apply plugin: 'com.jakewharton.butterknife'


dependencies {
  compile 'com.jakewharton:butterknife:8.8.1'
  annotationProcessor 'com.jakewharton:butterknife-compiler:8.8.1'
}

但是实际使用中如果按照此方法进行引用,app里面的注解会失效,但是修改起来也很简单,只需要将annotationProcessor 改为compile 即可

亲测可用,希望可以帮到你

最后推荐一个插件zelezny : Butterknife插件,在setting->plugins中搜索butterknife即可下载,下载后重启studio,在activity或者fragment下将光标选中xml文件的指引,右键选中generate可以快速生成注解,减少工作量

后来又遇到问题才发现原来是butterknife与lambda冲突导致的,引入java1.8就会导致butterknife失效,找了半天才找到解决办法,就是在project下添加

classpath 'me.tatarka:gradle-retrolambda:3.4.0'

然后在model中添加

apply plugin: 'me.tatarka.retrolambda'


 compileOptions {
        sourceCompatibility JavaVersion.VERSION_1_8
        targetCompatibility JavaVersion.VERSION_1_8
    }

就可以正常使用lambda和butterknife了,最后附上完成配置代码:
project:

apply plugin: 'kotlin'
buildscript {
    ext.kotlin_version = '1.1.4'
    repositories {
        jcenter()
        mavenCentral()
    }
    dependencies {
        classpath 'com.android.tools.build:gradle:2.3.3'
        classpath 'com.jakewharton:butterknife-gradle-plugin:8.8.1'
        classpath "org.jetbrains.kotlin:kotlin-gradle-plugin:$kotlin_version"
        classpath 'me.tatarka:gradle-retrolambda:3.4.0'
        // NOTE: Do not place your application dependencies here; they belong
        // in the individual module build.gradle files
    }
}

allprojects {
    repositories {
        jcenter()
    }
}

model:

apply plugin: 'me.tatarka.retrolambda'

android {
    compileSdkVersion 26
    buildToolsVersion "26.0.1"
    }
    compileOptions {
        sourceCompatibility JavaVersion.VERSION_1_8
        targetCompatibility JavaVersion.VERSION_1_8
    }

    buildTypes {
        release {
            minifyEnabled false
            proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro'
        }
    }
  
}

dependencies {
    compile 'com.jakewharton:butterknife:8.8.1'
    compile 'com.jakewharton:butterknife-compiler:8.8.1'
}