NullPointerException异常

Question

这是错误消息

这是我的代码

Answer 1

你正在努力寻找晶圆厂 in fab，fab1 in fab1 ... 您需要从Fragment的根视图中获取这些按钮。

@Override 
public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) { 
    View rootView = inflater.inflate(R.layout.carte_reseaux_fragment, container, false); 
    fab = (FloatingActionButton) rootView.findViewById(R.id.fab); 
    . 
    . 
    Animation fab_open = AnimationUtils.loadAnimation(getContext(), R.anim.fab_open); 
    //Actually FloatingActionButton has own implementation 
    fab.setShowAnimation(fab_open); 
    return rootView; 
}