Impact to ButterKnife from "Resource IDs will be non-final in Android Gradle Plugin version 5.0, avoid using them as annotation attributes"

  android, android-gradle-plugin, android-studio, butterknife, gradle

I’m using annotated attributes all over my Android project to bind Views and events to fields and methods.

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

@OnClick(R.id.buttonDateFilter)
public void onButtonDateFilter(View view) {...}

Migrating out of ButterKnife has become a bit expensive now. I would like to clarify a few things about this new Gradle Plugin change,

  • How will non-final resource id’s would affect my current project?
  • Will I have to migrate from ButterKnife for good if I update the Gradle Plugin?
  • What is the class R2 mentioned in this Reddit post?

Source: Android Questions

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