java - 如何使用 Filter 比较原始列表与 recyclerview 中的过滤列表？

Question

在这段代码中，我搜索了多个文本。我有搜索引擎。

sachin 显示列表，但单击返回 sachin 到 sac 不显示到适配器上的 sa 列表。没有库怎么解决？

当我按退格键并删除一个字符时，这次不列出不显示。示例

假设我有搜索 sachin 到文本更改 sachin 到 sac。在这种情况下不显示 sa 列表。我已经清除所有列表，案例显示所有列表。
搜索sa显示列表
sachin 和 sardar
现在搜索sac
现在显示sachin
只搜索sac to sc
那时候只显示sachin
不显示列表中的sardar

我的适配器

private class ItemFilter extends Filter {
    protected FilterResults performFiltering(CharSequence constraint) {

        FilterResults results = new FilterResults();

        if (constraint != null && constraint.length() > 0) {
            ArrayList<Build> buildlist = new ArrayList<Build>();


            for (int i = 0; i < buildList.size(); i++) {
                if ((buildList.get(i).getName().toUpperCase())
                        .contains(constraint.toString().toUpperCase())) {

                    Build babydata = new Build(buildList.get(i).getImages(), buildList.get(i).getName());

                    buildlist.add(babydata);
                }
            }
            results.count = buildlist.size();
            results.values = buildlist;

        } else {
            results.count = buildList.size();
            results.values = buildList;
        }
        return results;

    }

    @Override
    protected void publishResults(CharSequence constraint,
                                  FilterResults results) {
        buildList = (ArrayList<Build>) results.values;
        notifyDataSetChanged();
    }
}

Activity 类

 EditText editTxt = (EditText) findViewById(R.id.search);
    editTxt.addTextChangedListener(new TextWatcher() {

        @Override
        public void onTextChanged(CharSequence s, int start, int before, int count) {

            if (s.length() <= 0) {
                Log.d("jay", "s.length() <= 0" + s.toString());
                buildList.clear();
                buildList.addAll(buildListCopy);
                recyclerView.setAdapter(null);
                buildCustomAdapter = new BuildCustomAdapter(buildList);
                recyclerView.setAdapter(buildCustomAdapter);

            } else {
                buildCustomAdapter.getFilter().filter(s.toString());
            }
            Log.d("jay", "mobisharnam" + s.toString());
        }

        @Override
        public void beforeTextChanged(CharSequence s, int start, int count, int after) {

        }

        @Override
        public void afterTextChanged(Editable s) {
        }
    });

Answer 1

没有任何库简单的逻辑
这个问题终于有了答案

在您的适配器构造函数中添加新的副本列表

复制列表加入过滤器后

 private List<YourModel> modelList;
 private List<YourModel> modelListCopy;
 private ItemFilter mFilter = new ItemFilter();


 public YourAdapter(List<YourModel> modelList) {
    this.modelList= modelList;
    this.modelListCopy= new ArrayList<>();
    modelListCopy.addAll(modelList);
}
private class ItemFilter extends Filter {

    protected FilterResults performFiltering(CharSequence constraint) {
        FilterResults results = new FilterResults();

        if (constraint != null && constraint.length() > 0) {
            List<YourModel> filterList = new ArrayList<YourModel>();

            for (int i = 0; i < modelListCopy.size(); i++) {
                if ((modelListCopy.get(i).getName().toUpperCase())
                        .contains(constraint.toString().toUpperCase())) {
                    YourModel builddata = new YourModel(modelListCopy.get(i).getImages(), modelListCopy.get(i).getName());
                    filterList.add(builddata);
                }
            }
            results.count = filterList.size();
            results.values = filterList;

        } else {
            results.count = modelListCopy.size();
            results.values = modelListCopy;
        }
        return results;
    }

    @Override
    protected void publishResults(CharSequence constraint,
                                  FilterResults results) {
        modelList= (ArrayList<YourModel>) results.values;
        notifyDataSetChanged();
    }

Activity 类

像这样

 CustomAdapter youradapter= new CustomAdapter(modelList);