微调不改变,但适配器
我在我的应用程序中创建了Spinner
,当我做一些事情时我正在更改我的适配器。更改后,当我打开微调器时,它应刷新名称列表,但它保持不变。当我检查适配器时,我可以看到该列表已刷新正确,但未显示在微调器中。这里是我的代码:微调不改变,但适配器
public void addItemsToSpinner(UserSettings settings) {
List<Recipient> list = settings.getRecipients();
Recipient selectedRecipient = settings.getSelectedRecipient();
List<String> nicks = new ArrayList<>();
if (selectedRecipient != null) {
Log.d("utolsó","selected name " + selectedRecipient.getNickname());
nicks.add(selectedRecipient.getNickname());
}
for (Recipient recipient: list) {
if (selectedRecipient == null || !recipient.getNickname().equals(selectedRecipient.getNickname())) {
nicks.add(recipient.getNickname());
}
}
for(int i = 0 ;i<nicks.size();i++){
Log.d("TAG","print the order = " + nicks.get(i));
}
dataAdapter = new ArrayAdapter<>(getActivity(), R.layout.spinner_item, nicks);
dataAdapter.setDropDownViewResource(android.R.layout.simple_spinner_dropdown_item);
mSpinner.setAdapter(dataAdapter);
dataAdapter.notifyDataSetChanged();
}
@Nullable
@Override
public View onCreateView(LayoutInflater inflater, @Nullable ViewGroup container, @Nullable Bundle savedInstanceState) {
View view = inflater.inflate(R.layout.dialog_recipient_chooser, container, false);
mSpinner = (Spinner) view.findViewById(R.id.spinnerChooser);
mSpinner.setOnItemSelectedListener(new AdapterView.OnItemSelectedListener() {
@Override
public void onItemSelected(AdapterView<?> parent, View view, int position, long id) {
dataAdapter.notifyDataSetChanged();
if (mListener != null) {
mListener.onRecipientSelected(position);
}
}
@Override
public void onNothingSelected(AdapterView<?> parent) {
}
});
return view;
}
当我的命令是正确的,但在微调不是。谁能告诉我为什么?
有列表添加items..dataAdapter.notifyDataSetChanged后改变
在设置适配器并将新项目添加到列表后,您应该执行此操作 –
我已经编辑了我的代码,现在您可以看到我在哪里调用它。然后在日志中列表的顺序是正确的,但微调框中的第一个对象又是错误的 –
了解它,因为你在这里添加第一个项目,如果(selectedRecipient!= null){012,Log.d(“utolsó”,“selected名称“+ selectedRecipient.getNickname()); nicks.add(selectedRecipient.getNickname()); } –
通知适配器()后,您尝试使用
adapter.notifyDataSetChanged();
; –我在onItemSelected中做过。我应该在哪里做?在将适配器设置为微调器之前? –
当您将新项目添加到列表时,您应该通知您的适配器。所以在将项目添加到nicks列表之后。 –