Question

在此代码中，我搜索多个文本ex。我有搜索sachin。

sachin显示列表但点击后退sachin到sac不显示到适配器上的sa列表。如何解决它没有任何库？

当我按回空格并删除一个字符时，此时不显示不显示。实施例

假设我搜索sachin文本将sachin更改为sac。在这种情况下，不显示sa列表。我清楚所有列表，案例显示所有列表。
搜索sa显示列表
萨钦和萨达尔
现在搜索囊
现在展示萨钦
只搜索sac到sc 这个时间只显示sachin 没有在列表中显示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(); } }

活动类

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
最后我在这个问题上有解决方案

在适配器构造函数中添加新的副本列表

在过滤器中添加复制列表

 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();
    }

活动类

像这样

 CustomAdapter youradapter= new CustomAdapter(modelList);

Answer 2

我更喜欢谓词搜索过滤器我已将您的代码更改为使用谓词，您必须使用google guava库在你的gradle中包括以下依赖

compile 'com.google.guava:guava:19.0'

现在，请检查以下代码

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

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

            String searchQuery = s.toString();
                if (buildListCopy != null && buildListCopy.size() > 0) {
                    buildList = Lists.newArrayList(Collections2.filter(buildListCopy, new SearchFilter(searchQuery)));
                    recyclerView.setAdapter(null);
                    if (buildList != null && buildList.size() > 0) {);
                        buildCustomAdapter = new BuildCustomAdapter(buildList);
                        recyclerView.setAdapter(buildCustomAdapter);
                        recyclerView.getAdapter().notifyDataSetChanged();
                    }
                }
                return false;
        }

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

        }

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

以下是我们上面使用的搜索过滤器谓词

/**
     * Custom Predicate class to filter list as per search query
     */
    public final class SearchFilter implements Predicate<Build> {
        private final Pattern pattern;

        public SearchFilter(final String regex) {
            pattern = Pattern.compile(regex, Pattern.CASE_INSENSITIVE | Pattern.DOTALL | Pattern.LITERAL);
        }

        @Override
        public boolean apply(final Build input) {
            return pattern.matcher(input.getName().toLowerCase()).find();
        }
    }

如何使用Filter将recycList与recyclerview中的filterList进行比较？

2 个答案: