badsystem.blogg.se - Butterknife android studio plugin

All of these features are what you can expect from the Butter Knife library to help you keep your codebase neat and tidy. can all be mapped to a field via an annotation. Say you’ve a bunch of fields in your layout that get hidden or unhidden depending on some logic? Butter Knife lets you operate on a group of views, via a list or array, with actions or setters so instead of a loop through the fields of a field group you’re able to easily act on all of the fields with a line of code.įinally, Butter Knife helps eliminate resource lookups by using resource annotations on fields. Here’s where Butter Knife gets interesting. That’s pretty rad considering before you had to either create a find and then an anonymous inner class to handle the click on that field OR have an onClick attribute on the field in your layout and hope you created the method with the same name. Similarly, you’re able to annotate methods in your Java code to handle clicks. So one of the main benefits is no more findViewById calls.

Using annotations to generate boilerplate codeīutter Knife lets you annotate your fields in your Java code so that you don’t need to link it to a view id from your layout.

Connect views & resources easily & cleanly.

To quote Jake Wharton’s Butter Knife GitHub page, “A butter knife is like a dagger only infinitely less sharp.”īutter Knife was built to do the following: Butter Knife follows in that it too is a dependency injection albeit less powerful than the others as it focuses on just handling field and method binding to layouts. These are dependency injection (DI) libraries. Butter Knife has it’s roots in libraries like Guice & Dagger. What if there was a better way? Jake Wharton, an engineer at Square, has built such a way. Certain criteria to change to color of a TextView? … you’ll need findViewById. Special logic to hide or show a button?… you’ll need findViewById. Many of your apps have their onCreate or init methods littered with this method call to obtain reference to all your views that need to interact with your code.

It helps you access views contained in the layout files of your Activities or Fragments.

As an Android developer you’ve undoubtedly seen, and called, that method many times. So if you’re an Android developer than you’ve used findViewById.