Android中Spinner二级联动动态加载数据

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最近在做一个项目中用到了两个Spinner，我觉得这样写起来更简单。

xml文件：

        <Spinner            android:layout_width="match_parent"            android:layout_height="40dp"            android:id="@+id/xxjk_fl_sp"            />        <Spinner            android:layout_width="match_parent"            android:layout_height="40dp"            android:id="@+id/xxjk_rw_sp"            />

item：

        <TextView xmlns:android="http://schemas.android.com/apk/res/android"            android:layout_width="match_parent"            android:layout_height="50dp"            android:text="gagaf"            android:gravity="center"            >

代码：

public class XxjkFragment extends Fragment {

private View view;private Spinner xxjk_fl_sp;private Spinner xxjk_rw_sp;private ArrayList<ArrayList<String>> arrayList = new ArrayList<>();private List<String> list = new ArrayList<>();private List<String> list1 = new ArrayList<>();private List<String> list2 = new ArrayList<>();private List<String> list3 = new ArrayList<>();@Nullable@Overridepublic View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {    view = inflater.inflate(R.layout.fragment_xxjk,null);    initView();    initData();    listen();    return view;}private void listen() {    xxjk_fl_sp.setAdapter(new ArrayAdapter<String>(getActivity(),R.layout.item,list));    xxjk_fl_sp.setOnItemSelectedListener(new AdapterView.OnItemSelectedListener() {        @Override        public void onItemSelected(AdapterView<?> parent, View view, int position, long id) {            xxjk_rw_sp.setAdapter(new ArrayAdapter<String>(getActivity(),R.layout.item,arrayList.get(position)));        }        @Override        public void onNothingSelected(AdapterView<?> parent) {        }    });}private void initView() {    xxjk_fl_sp = ((Spinner) view.findViewById(R.id.xxjk_fl_sp));    xxjk_rw_sp = ((Spinner) view.findViewById(R.id.xxjk_rw_sp));}private void initData() {    list.add("北京");    list.add("河北");    list.add("数字");    list1.add("海淀");    list1.add("朝阳");    list1.add("昌平");    list2.add("张家口");    list2.add("保定");    list2.add("石家庄");    list3.add("123");    list3.add("456");    list3.add("789");    arrayList.add((ArrayList<String>) list1);    arrayList.add((ArrayList<String>) list2);    arrayList.add((ArrayList<String>) list3);}

}

我写在了fragment里边，在activity中也一样。

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