Kotlin Programming Cookbook

How to do it…

To include Butterknife in your project, follow the given steps:

1.  To start with, add the following lines to your build.gradle file; also, you need to add the kotlin-kapt plugin and replace annotationProcessor with kapt. kapt is the Java equivalent of annotationProcessor, so wherever you used annotationProcessor, you need to replace it with kapt:

apply plugin: 'kotlin-kapt'  dependencies {  ...      compile "com.jakewharton:butterknife:$butterknife-version"      kapt "com.jakewharton:butterknife-compiler:$butterknife-version" }

2. In Java, we used the Butterknife library, as shown:

@BindView(R.id.headline) TextView headline;

In Kotlin, we can do it as follows:

@BindView(R.id.headline) lateinit var headline: TextView

Note that we've ...