核心 LayoutInflater 加载一个布局,通过findById找到所需要的view
View view = LayoutInflater.from(this).inflate(R.layout.activity_login_password_view,null);
TextView firstName = ButterKnife.findById(view, R.id.first_name);
TextView lastName = ButterKnife.findById(view, R.id.last_name);