为什么这段代码:
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
view = inflater.inflate(R.layout.fragment_assets, container, false);
List<String> states = new ArrayList<String>();
String abs = "AL AK AZ AR CA CO CT DE FL GA HI ID IL IN "
+ "IA KS KY LA ME MD MA MI MN MS MO MT NE NV NH NJ NM NY NC ND OH OK "
+ "OR PA RI SC SD TN TX UT VT VA WA WV WI WY";
for (String parts : abs.split(" ")) {
states.add(parts);
}
EditText store = (EditText) view.findViewById(R.id.store_input_ID);
EditText phone = (EditText) view.findViewById(R.id.phone_input_ID);
EditText address = (EditText) view.findViewById(R.id.address_input_ID);
EditText city = (EditText) view.findViewById(R.id.city_input_ID);
EditText zip = (EditText) view.findViewById(R.id.zip_input_ID);
Spinner myStates = (Spinner) view.findViewById(R.id.bi_spinner);
ArrayAdapter<String> aa = new ArrayAdapter<String>(getActivity(),
android.R.layout.simple_spinner_dropdown_item, states);
myStates.setAdapter(aa);
return view;
}
崩溃加载并在此行给我一个空指针异常
myStates.setAdapter(aa);
我已经尝试移动,我将 Array
和 ArrayList
声明在上面,我首先在 onCreate
之外的布局进行膨胀,然后在我找到所有 Views
之后直接移动,但它仍然提供空指针异常 .
我似乎无法弄明白,我知道我错过了一些明显的东西 .
2 回答
你的Spinner
myStates
为空 . 确保在fragment_assets.xml
中有一个id为bi_spinner
的微调器,它应该正确实例化 .尝试在
setAdapter
之前添加以下行: