在 Edittext 文本更改时更新 recyclerview

Question

我在片段下方有一个 Edittext 和一个 recyclerview。 recyclerview 行项目有一个文本视图。我已经设置了适配器，一切正常。我想用 edittext 中的文本更改 recyclerview 的每个项目，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

调用您的 getListForRv() 编辑文本 afterTextChanged 方法。

Answer 2

notifyDataSetChanged会刷新所有itemview，如果要同步所有edittext

我有两个解决方案：

数据绑定：您可以使用 ObservableField
创建一个侦听器并确保所有项目都保持侦听器，当编辑文本更改时，调用侦听器然后所有项目视图都会接受更改

Answer 3

最后我通过执行以下操作设法解决了这个问题，不知道这是否是一种不好的做法但对我有用：

  @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));
        }
    }

在 Edittext 文本更改时更新 recyclerview

Update recyclerview on Edittext text change

android

android-edittext

android-recyclerview