findViewById（）在滑动导航抽屉中返回null值

Question

我在导航抽屉的滑动xml中有textview，当我试图访问textview时，它在findviewId给我空指针错误有人能告诉我如何访问它吗？我正在尝试使用它，但我无法这样做.....

function composeObj(objs, ...rest){
  return Object.assign(...rest);
}

Answer 1

替换此

 txtUserName.findViewById(R.id.txtUserName);
 txtUserDob.findViewById(R.id.txtUserDob);
 txtUserPlace.findViewById(R.id.txtUserLocation);

用这个

 txtUserName =  (TextView)findViewById(R.id.txtUserName);
 txtUserDob = (TextView)findViewById(R.id.txtUserDob);
 txtUserPlace = (TextView)findViewById(R.id.txtUserLocation);