Butter Knife

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

Eliminate findViewById calls by using @BindView 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 @OnClick and others.
Eliminate resource lookups by using resource annotations on fields.

class ExampleActivity extends Activity {
  @BindView(R.id.user) EditText username;
  @BindView(R.id.pass) EditText password;

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

  @OnClick(R.id.submit) 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.

Download

Add this to you project-level build.gradle:

buildscript {
  repositories {
    mavenCentral()
   }
  dependencies {
    classpath 'com.neenbedankt.gradle.plugins:android-apt:1.8'
  }
}

Add this to your module-level build.gradle:

apply plugin: 'android-apt'

android {
  ...
}

dependencies {
  compile 'com.jakewharton:butterknife:8.1.0'
  apt 'com.jakewharton:butterknife-compiler:8.1.0'
}

Make sure the line apply plugin ... is placed somewhere at the top of the file.

Snapshots of the development version are available in Sonatype's snapshots repository.

Compiling with Jack and Build Tools 24

The new Jack compiler for Android requires new settings. The android-apt module is no longer required.

Add this to you project-level build.gradle:

buildscript {
  repositories {
    mavenCentral()
   }
  dependencies {

    // Requires Build Tools 2.2.0 at least
    classpath 'com.android.tools.build:gradle:2.2.0-alpha3'
  }
}

Add this to your module-level build.gradle:

android {
    compileSdkVersion 24
    buildToolsVersion "24.0.0"

    defaultConfig {
      ...

      jackOptions {
          enabled true
      }
    }

    ...
}

dependencies {
    compile 'com.jakewharton:butterknife:8.1.0'
    annotationProcessor 'com.jakewharton:butterknife-compiler:8.1.0'
}

Also, make sure to have an updated gradle-wrapper version defined in gradle/wrapper/gradle-wrapper.properties:

distributionUrl=https\://services.gradle.org/distributions/gradle-2.14-all.zip

License

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

   http://www.apache.org/licenses/LICENSE-2.0

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.

zubietaroberto/butterknife

Butter Knife

Download

Compiling with Jack and Build Tools 24

License