Question

我有使用简单适配器的自定义列表视图，目前我有关于过滤器的问题，我在listview中有数字和字符的自定义列表数据。

如果我输入名称，那么它会给出一个空格，过滤结果会消失。

我有列表数据，如名称，然后编号，例如：NAME 123，每当我输入名称，然后在该编辑文本中给出空格，然后结果消失，列表视图消失。

我在下面的链接上尝试了这个但是他们使用了数组适配器，所以我的问题是它是否只能在数组适配器中使用或者我可以使用简单的适配器？

Android listview edittext filter space button?

如果是，那么我该如何实施，请帮助。谢谢你。

Answer 1

试试这种方式

searchView.setOnEditorActionListener(new EditText.OnEditorActionListener() {
@Override
public boolean onEditorAction(TextView v, int actionId,
                              KeyEvent event) {
    return true;
}
});
addTextChangeListener();

现在创建方法addTextChangeListener

 private void addTextChangeListener() {
 searchView.addTextChangedListener(new TextWatcher() {
@Override
public void beforeTextChanged(CharSequence s, int start, int count, int after) {

}

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

    query = query.toString().trim().toLowerCase();

    final ArrayList<CityDataModel> filteredList = new ArrayList<>();



    final CharSequence finalQuery = query;
    new Thread(new Runnable() {
        @Override
        public void run() {

            // Clear the filter list
            filteredList.clear();

            // If there is no search value, then add all original list items to filter list
            if (TextUtils.isEmpty(finalQuery)) {

                filteredList.addAll(cities);

            } else {
                // Iterate in the original List and add it to filter list...
                for (CityDataModel item : cities) {
                    if (item.getCity_name().toLowerCase().contains(finalQuery.toString().toLowerCase())
                            ) {
                        // Adding Matched items
                        filteredList.add(item);
                    }
                }
            }

            // Set on UI Thread
            ((Activity) context).runOnUiThread(new Runnable() {
                @Override
                public void run() {
                    // Notify the List that the DataSet has changed...
                    adapter = new SearchCityAdapter(SearchCityClass.this, filteredList);
                    recyclerSearchCity.setAdapter(adapter);
                }
            });

        }
    }).start();


}

@Override
public void afterTextChanged(Editable s) {

}
 });
  }

Answer 2

您可以使用任何适配器，您可以使用android.widget.Filterable

实现您的适配器

示例适配器，

public class AppAdapter extends RecyclerView.Adapter<AppHolder> implements Filterable {

    public static final String TAG = AppAdapter.class.getSimpleName();

    private ArrayList<App> mApps = new ArrayList<>();

    private List<App> mCurrentItmCopy = new ArrayList<>();

    private String currentFilter;

    private MyArrayFilter mFilter;

    @Override
    public AppHolder onCreateViewHolder(ViewGroup parent, int viewType) {

        View receiverView = LayoutInflater.from(parent.getContext()).
                inflate(R.layout.layout_row_apps, parent, false);


        return new AppHolder(receiverView);
    }

    @Override
    public void onBindViewHolder(final AppHolder holder, int position) {
        final App data = mApps.get(position);

    }

    @Override
    public int getItemCount() {
        return mApps.size();
    }

    @Override
    public Filter getFilter() {
        if (mFilter == null) {
            mFilter = new MyArrayFilter();
        }
        return mFilter;
    }


    private class MyArrayFilter extends Filter {
        @Override
        protected FilterResults performFiltering(CharSequence prefix) {

            FilterResults results = new FilterResults();

            if (mCurrentItmCopy == null || (mCurrentItmCopy.size() == 0)) {
                mCurrentItmCopy = new ArrayList<App>(mApps);
            }

            ArrayList<App> newValues = new ArrayList<App>();
            if (prefix != null && !TextUtils.isEmpty(prefix.toString())) {
                String prefixString = prefix.toString().toLowerCase();
                for (App value : mCurrentItmCopy) {
                    String label = value.getLabel().toLowerCase();

                    if ((label.contains(prefixString)) && !newValues.contains(value)) {
                        newValues.add(value);
                    }
                }
                results.values = newValues;
                results.count = newValues.size();
            } else {
                results.values = new ArrayList<App>(mCurrentItmCopy);
                results.count = mCurrentItmCopy.size();

                mCurrentItmCopy.clear();
            }
            return results;
        }

        @Override
        protected void publishResults(CharSequence constraint, FilterResults results) {
            currentFilter = constraint.toString();

            if (results.count > 0) {
                mApps.clear();

                addAll((ArrayList<App>) results.values);

            } else {

                mApps.clear();
                notifyDataSetChanged();
            }
        }
    }

    public void addAll(List<App> items) {

        if (items != null) {
            mApps.addAll(items);
        }

        notifyDataSetChanged();
    }

 }

在上面的适配器而不是App中，您可以使用您的对象。

您可以通过此活动或片段进行调用，

mAdapter.getFilter().filter(newText);

如何使用自定义列表视图获取edittext过滤器中的空间？是否可以使用简单的适配器？

2 个答案: