Ran into an issue with butterknife and kotlin 1.3 ...

# android

[nemi]

Ran into an issue with butterknife and kotlin 1.3 (though the example is kinda silly). Stripped down to the bare minimum here is the setup

Simple android project with on app and one library module using butterknife. The library module has the following class

class Foo {
    @BindView(R2.id.someText) @JvmField var someText: TextView? = null

    fun bind(activity: Activity) {
        ButterKnife.bind(this, activity)
        requireNotNull(someText)
    }
}

The app module has a single activity with the following onCreate

override fun onCreate(savedInstanceState: Bundle?) {
    super.onCreate(savedInstanceState)
    setContentView(R.layout.activity_main)
    Foo().bind(this)
}

When running this “app” it will crash with an `IllegalArgumentException`as the someText field is going to be null.

The generated Foo_ViewBinding uses the following piece of code to bind someText

target.someText = Utils.findOptionalViewAsType(source, 2131492945, "field 'someText'", TextView.class);

2131492945 is the value of R.id.someText