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    README.md

    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.

    Logo

    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

    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 annotationProcessor with kapt.

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

    Library projects

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

    buildscript {
      repositories {
        mavenCentral()
        google()
      }
      dependencies {
        classpath 'com.jakewharton:butterknife-gradle-plugin:10.2.3'
      }
    }

    and then apply it in your module:

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

    Now make sure you use R2 instead of R inside all Butter Knife annotations.

    class ExampleActivity extends Activity {
      @BindView(R2.id.user) EditText username;
      @BindView(R2.id.pass) EditText password;
    ...
    }

    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.

    项目简介

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    源项目地址

    https://github.com/JakeWharton/butterknife

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