android ButterKnife的简单使用

作者: android 发布时间: 2019-09-20 浏览: 2001 次 编辑

Butter Knife

Attention: Development on this tool is winding down. Please consider switching toview binding in the coming months.


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( EditText username;
  @BindView( EditText password;

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

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

  @Override public void onCreate(Bundle savedInstanceState) {
    // 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:10.2.0'
  annotationProcessor 'com.jakewharton:butterknife-compiler:10.2.0'

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 {
  dependencies {
    classpath 'com.jakewharton:butterknife-gradle-plugin:10.2.0'

and then apply it in your module:

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

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

class ExampleActivity extends Activity {
  @BindView( EditText username;
  @BindView( EditText password;


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