BindView的简单使用格式

 class ExampleActivity extends Activity {
      @BindView(R.id.title) 
      TextView title;
      
   @Override 
      public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.simple_activity);
        ButterKnife.bind(this);
      }
  }

相当于

  class ExampleActivity extends Activity {
      TextView title；
      
   @Override 
      public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.simple_activity);
		title = (TextView)findViewById(R.id.title);
      }
  }