1.导入依赖
implementation 'com.jakewharton:butterknife:9.0.0-rc1'
annotationProcessor 'com.jakewharton:butterknife-compiler:9.0.0-rc1'
2.加在项目下的build.gradle中
classpath 'com.jakewharton:butterknife-gradle-plugin:9.0.0-rc1'
3.并在app下的build中写入
apply plugin: 'com.jakewharton.butterknife'