@BindView(R.id.circleView)
CircleView circleView;
@BindView(R.id.tv_test)
TextView tvTest;
 
@Override
protected void onCreate(Bundle savedInstanceState)
{
  super.onCreate(savedInstanceState);
  setContentView(R.layout.activity_main);
  ButterKnife.bind(this);
}
 
/*
* 多個控件點擊事件，會有大括號包起來，中間逗號隔開
* */
@OnClick({R.id.circleView, R.id.tv_test})
public void onViewClicked(View view)
{
  switch (view.getId())
  {
    case R.id.circleView:
      break;
    case R.id.tv_test:
      break;
  }
}
 
@Override
protected void onDestroy()
{
  ButterKnife.bind(this).unbind();
  super.onDestroy();
}

apply plugin: 'com.android.application'
apply plugin: 'kotlin-android-extensions'
apply plugin: 'kotlin-android'
apply plugin: 'kotlin-kapt'
 
dependencies {
  implementation fileTree(dir: 'libs', include: ['*.jar'])
  implementation 'com.android.support:appcompat-v7:26.1.0'
  implementation 'com.android.support.constraint:constraint-layout:1.0.2'
  //控件插件
  implementation 'com.jakewharton:butterknife:8.8.1'
  kapt 'com.jakewharton:butterknife-compiler:8.8.1'
  compile "org.jetbrains.kotlin:kotlin-stdlib-jre7:$kotlin_version"
}