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Bind Android views and callbacks to fields and methods.

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Butter Knife

Attention: This tool is now deprecated. Please switch to view binding. Existing versions will continue to work, obviously, but only critical bug fixes for integration with AGP will be considered. Feature development and general bug fixes have stopped.


Field and method binding for Android views which uses annotation processing to generate boilerplate code for you.

  • Eliminate
    calls by using
    on fields.
  • Group multiple views in a list or array. Operate on all of them at once with actions, setters, or properties.
  • Eliminate anonymous inner-classes for listeners by annotating methods with
    and others.
  • Eliminate resource lookups by using resource annotations on fields.
class ExampleActivity extends Activity {
  @BindView( EditText username;
  @BindView( EditText password;

@BindString(R.string.login_error) String loginErrorMessage;

@OnClick( void submit() { // TODO call server... }

@Override public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.simple_activity); ButterKnife.bind(this); // TODO Use fields... } }

For documentation and additional information see the website.

Remember: A butter knife is like a dagger, only infinitely less sharp.


android {
  // Butterknife requires Java 8.
  compileOptions {
    sourceCompatibility JavaVersion.VERSION_1_8
    targetCompatibility JavaVersion.VERSION_1_8

dependencies { implementation 'com.jakewharton:butterknife:10.2.3' annotationProcessor 'com.jakewharton:butterknife-compiler:10.2.3' }

If you are using Kotlin, replace


Snapshots of the development version are available in Sonatype's


Library projects

To use Butter Knife in a library, add the plugin to your

buildscript {
  repositories {
  dependencies {
    classpath 'com.jakewharton:butterknife-gradle-plugin:10.2.3'

and then apply it in your module:

apply plugin: ''
apply plugin: 'com.jakewharton.butterknife'

Now make sure you use

instead of
inside all Butter Knife annotations.
class ExampleActivity extends Activity {
  @BindView( EditText username;
  @BindView( EditText password;


Copyright 2013 Jake Wharton

Licensed under the Apache License, Version 2.0 (the "License"); you may not use this file except in compliance with the License. You may obtain a copy of the License at

Unless required by applicable law or agreed to in writing, software distributed under the License is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the License for the specific language governing permissions and limitations under the License.

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