对Edittext文本更改更新recyclerview

Question

我有一个Edittext和一个位于它下面的recyclerview片段。recyclerview行项目具有文本视图。我已经设置好了适配器，一切都很好。我想用edittext中的文本更改recyclerview的每一项，但不知何故它不起作用。我尝试在getListForRv((方法上使用itemArrayAdapter.notifyDataSetChanged((。

@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
// Inflate the layout for this fragment
View view = inflater.inflate(R.layout.fragment_fonts, container, false);
itemList = new ArrayList<FontItem>();
EditText editText = view.findViewById(R.id.edit_text);
itemArrayAdapter = new ItemArrayAdapter(R.layout.recyclerview_item, itemList);

recyclerView = (RecyclerView) view.findViewById(R.id.font_list);
recyclerView.setLayoutManager(new LinearLayoutManager(getActivity()));
recyclerView.setItemAnimator(new DefaultItemAnimator());
recyclerView.setAdapter(itemArrayAdapter);
getListForRv(10);
editText.addTextChangedListener(new TextWatcher() {
@Override
public void beforeTextChanged(CharSequence s, int start, int count, int after) {
}
@Override
public void onTextChanged(CharSequence s, int start, int before, int count) {
getListForRv(90);
}
@Override
public void afterTextChanged(Editable s) {
getListForRv(90);
}
});

return view;
}
private void getListForRv(int k) {
for (int i = k; i < 1000; i++) {
itemList.add(new FontItem("Item " + i));
}
itemArrayAdapter.notifyDataSetChanged();
}

Answer 1

在编辑文本afterTextChanged方法上调用getListForRv()。

Answer 2

notifyDataSetChanged将刷新所有itemview，如果您想同步所有编辑文本

我有两个解决方案：

1. 数据绑定：您可以使用ObservableField
2. 创建一个监听器，并确保所有项都保留监听器，当editext更改时，调用监听器，然后所有项视图都将接受更改

Answer 3

最后，我通过以下操作解决了这个问题，不知道这是否是一个糟糕的做法，但对我有效：

@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
// Inflate the layout for this fragment
View view = inflater.inflate(R.layout.fragment_fonts, container, false);
itemList = new ArrayList<FontItem>();
EditText editText = getActivity().findViewById(R.id.edit_text);
itemArrayAdapter = new ItemArrayAdapter(R.layout.recyclerview_item, itemList);

recyclerView = (RecyclerView) view.findViewById(R.id.font_list);
recyclerView.setLayoutManager(new LinearLayoutManager(getActivity()));
recyclerView.setItemAnimator(new DefaultItemAnimator());
recyclerView.setAdapter(itemArrayAdapter);
getListForRv(10);
editText.addTextChangedListener(new TextWatcher() {
@Override
public void beforeTextChanged(CharSequence s, int start, int count, int after) {
}
@Override
public void onTextChanged(CharSequence s, int start, int before, int count) {
recyclerView.setLayoutManager(new LinearLayoutManager(getActivity()));
recyclerView.setItemAnimator(new DefaultItemAnimator());
recyclerView.setAdapter(itemArrayAdapter);
getListForRv(90);
itemArrayAdapter.notifyDataSetChanged();
}
@Override
public void afterTextChanged(Editable s) {

}
});

return view;
}
private void getListForRv(int k) {
if (!itemList.isEmpty())
itemList.clear();
for (int i = k; i < 1000; i++) {
itemList.add(new FontItem("Item " + i));
}
}