ButterKnife入门使用

注意：10.0.0 版本改为8.4.0 降低版本，否则出错。
1.简介

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

2.依赖

project 里的build.gradle

classpath 'com.jakewharton:butterknife-gradle-plugin:10.0.0'

module里的build.gradle文件里

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


dependencies {
  implementation 'com.jakewharton:butterknife:10.0.0'
  annotationProcessor 'com.jakewharton:butterknife-compiler:10.0.0'
}

3.使用
activity使用 注意view不能为private 或者static

            @BindView(R.id.edit_text)
            EditText mEditText;
            @Override
            protected void onCreate(Bundle savedInstanceState) {
                  super.onCreate(savedInstanceState);
                  setContentView(R.layout.activity_main);

                  ButterKnife.bind(this); // 绑定
            }

4.fragment使用

public View onCreateView(LayoutInflater inflater,ViewGroup container, Bundle savedInstanceState) {
                View rootView = inflater.inflate(R.layout.frag_main, container, false);
                //这里有些不同
                ButterKnife.bind(this, rootView);

                return rootView;
              }
 }

5.点击事件使用

       @OnClick(R.id.button)
        public void onButtonClick(View view) {
            Toast.makeText(this, "button被点击了", Toast.LENGTH_SHORT).show();
        }