[英]nullpointer when setting adapter
I am trying to set an adapter for a ListView
in one of my fragments. 我试图在我的一个片段中为
ListView
设置适配器。 However, I am receiving a null pointer error and I'm not sure whats wrong. 但是,我收到一个空指针错误,我不确定是什么错误。
public class OptionsFragment extends Fragment{
ArrayAdapter<String> adapter;
//ArrayAdapter<String> adapter1 = ArrayAdapter.createFromResource
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
View rootView = inflater.inflate(R.layout.optionsfragmentnew, container, false);
ListView cListView = (ListView) rootView.findViewById(R.id.currencyListView);
String[] test = {"1", "2", "3", "4", "5", "6", "7", "8", "9", "10"};
adapter = new ArrayAdapter<String>(this.getActivity(), android.R.layout.simple_list_item_1, test);
//View v = inflater.inflate(R.layout.optionsfragmentnew, container, false);
cListView = (ListView) rootView.findViewById(android.R.id.list);
cListView.setAdapter(adapter);
return rootView;
}
}
在onActivityCreated()
方法而不是onCreateView()
期间设置适配器。
I hope this code will help You 希望这段代码对您有帮助
public class OptionsFragment extends Fragment {
ListView list;
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
return inflater.inflate(R.layout.activity_main, container, false);
}
@Override
public void onActivityCreated(Bundle savedInstanceState) {
super.onActivityCreated(savedInstanceState);
list = (ListView) getActivity().findViewById(R.id.list);
String[] test = {"1", "2", "3", "4", "5", "6", "7", "8", "9", "10"};
ArrayAdapter adapter = new ArrayAdapter<String>(this.getActivity(), android.R.layout.simple_list_item_1, test);
list.setAdapter(adapter);
}
} }
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