FireBaseUI-不兼容的类型:字符串无法转换为DatabaseReference

mlistview=(listview)rootview.findviewbyid(r.id.listview1);
databasereference databasereference=firebasedatabase.getinstance().getreferencefromurl(“https://my project.firebaseio.com/name/data”);
firebaseListAdapter<personnel>adapter=new firebaseListAdapter<personnel>(getactivity(),personnel.class,r.layout.layout_items,databasereference){
@覆盖
保护无效填充视图(视图V,人员模型,内部位置){
textView textView=(textView)v.findView byid(r.id.tv_title);
textview.settext(model.name);
}
}(二)
mlistview.setadapter(适配器);
OniEmclick for the listView(modified fromthis)


mlistview.setOnitEmclickListener(new adapterview.OnitEmclickListener()。{
@覆盖
public void OnItemClick(adapterView<?>adapterview,视图视图,int位置,long id){
databasereference itemref=adapter.getItem(位置);
toast toast=toast.maketext(getActivity().getApplicationContext(),itemRef.getKey(),toast.length_short);
toast.show();
}
})(二)

首先,我从内部类中访问变量“adapter”,需要声明为finalerror onadapterinadapter.getitem(position);underoniteclick


因此,我添加了finalatfinal firebaseListadapter<personnel>adapter…then this error come up


我尝试将adapter声明为global,但仍然出现相同的错误。请告诉我怎么修这个。谢谢!

我用来从FireBase数据库填充ListView的代码


mListView = (ListView) rootView.findViewById(R.id.listview1);
DatabaseReference databaseReference = FirebaseDatabase.getInstance().getReferenceFromUrl("https://my-project.firebaseio.com/name/data");
FirebaseListAdapter<Personnel> adapter = new FirebaseListAdapter<Personnel>(getActivity(),Personnel.class,R.layout.layout_items,databaseReference) {
    @Override
    protected void populateView(View v, Personnel model, int position) {
        TextView textView = (TextView) v.findViewById(R.id.tv_title);
        textView.setText(model.name);
    }
};
mListView.setAdapter(adapter);


单击以查看列表视图(修改自this)

mListView.setOnItemClickListener(new AdapterView.OnItemClickListener() {
    @Override
    public void onItemClick(AdapterView<?> adapterView, View view, int position, long id) {
        DatabaseReference itemRef = adapter.getItem(position);
        Toast toast = Toast.makeText(getActivity().getApplicationContext(), itemRef.getKey(), Toast.LENGTH_SHORT);
        toast.show();
    }
});


首先我得到Variable 'adapter' is accessed from within inner class, needs to be declared final上的错误adapter在里面adapter.getItem(position);在下面单击


所以我补充说final在final FirebaseListAdapter<Personnel> adapter...然后出现这个错误


我试过声明适配器虽然是全局的,但仍然有相同的错误。请告诉我怎么修这个。谢谢!