如何使此适配器可搜索？

Question

这是我的列表视图的适配器.. 我想向其中添加过滤器或搜索功能。请帮我。但是我看过很多代码但是 none 帮助我实现了它。而且我还没有看到扩展 ArrayAdapter 的适配器，其中有一个 getFilter。所以请帮助我。

public class FullNameAdapter extends ArrayAdapter<Name> implements Filterable {

    public FullNameAdapter(Context context, ArrayList<Name> words){
        super(context, 0, words);
    }

    @NonNull
    @Override
    public View getView(int position, @Nullable View convertView, @NonNull ViewGroup parent) {

        View listItemView = convertView;
        if(listItemView == null) {
            listItemView = LayoutInflater.from(getContext()).inflate(R.layout.main_listview, parent, false);
        }
        Name currentWord = getItem(position);

        TextView mainNumber = (TextView) listItemView.findViewById(R.id.mainNumber_page);
        mainNumber.setText(currentWord.getMainNumber());

        TextView sanskritName = (TextView) listItemView.findViewById(R.id.sanskrit_name_text_view_ml);
        sanskritName.setText(currentWord.getSanskritName());

        TextView scientificName = (TextView) listItemView.findViewById(R.id.scientific_name_text_view_ml);
        scientificName.setText(currentWord.getScientificName());

        TextView familyName = (TextView) listItemView.findViewById(R.id.family_text_view_ml);
        familyName.setText(currentWord.getFamilyName());

        ShapeableImageView panel_IMG_back = (ShapeableImageView) listItemView.findViewById(R.id.mainList_imageView);
        Glide.with(getContext()).load(currentWord.getPicId()).into(panel_IMG_back);
        panel_IMG_back.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {

                Dialog builder = new Dialog(getContext());
                builder.requestWindowFeature(Window.FEATURE_NO_TITLE);
                builder.getWindow().setBackgroundDrawable(
                        new ColorDrawable(android.graphics.Color.TRANSPARENT));

                builder.setOnDismissListener(new DialogInterface.OnDismissListener() {
                    @Override
                    public void onDismiss(DialogInterface dialogInterface) {
                        //nothing;
                    }
                });

                ZoomageView imageView = new ZoomageView(getContext());
                imageView.setImageResource(currentWord.getPicId());
                builder.addContentView(imageView, new RelativeLayout.LayoutParams(
                        ViewGroup.LayoutParams.MATCH_PARENT,
                        ViewGroup.LayoutParams.MATCH_PARENT));

                builder.setCanceledOnTouchOutside(true);
                builder.show();

            }
        });return listItemView;}}

请帮忙！

在MAINACTIVITY中，Action Bar SEARCH VIEW在Mainactivity中，应该怎么办？这里

 @Override
    public boolean onCreateOptionsMenu(Menu menu) {
        MenuInflater inflater = getMenuInflater();
        inflater.inflate(R.menu.list_menu, menu);
        MenuItem menuItem = menu.findItem(R.id.action_search);
        SearchView searchView = (SearchView) menuItem.getActionView();
        searchView.setOnQueryTextListener(new SearchView.OnQueryTextListener() {
            @Override
            public boolean onQueryTextSubmit(String query) {
                return false;
            }
            @Override
            public boolean onQueryTextChange(String newText) {
                
                return true;
            }
        });
        return super.onCreateOptionsMenu(menu);
    }

这些是我添加到我的数组列表中的对象，我想搜索其中的一些对象，如果数组中的字符串匹配，则数组列表可以显示在列表中。但如果名称没有匹配的字符串，它应该去！

private void smallaaray() {
        array = new ArrayList<Name>();
        array.add(new Name("1", "akhil","", "", R.drawable.0,
                R.string.0, "",
                "","","","","","","","","","","","","",R.drawable.0,R.drawable.0,R.drawable.0,R.drawable.0));

请帮忙！

Answer 1

适配器只关心数据和视图。过滤和搜索应该是对数据源的操作。因此，您应该在对数据源进行操作后更新适配器

Answer 2

您可以像下面这样创建自定义过滤器，将您的列表传递给 searching/filtering

适配器的 setFilterList() 方法

触发搜索：

adapter.getFilter().filter();

public class FullNameAdapter extends ArrayAdapter<Name> implements Filterable {

    public FullNameAdapter(Context context, ArrayList<Name> words) {
        super(context, 0, words);
    }

    @NonNull
    @Override
    public View getView(int position, @Nullable View convertView, @NonNull ViewGroup parent) {

        View listItemView = convertView;
        if (listItemView == null) {
            listItemView = LayoutInflater.from(getContext()).inflate(R.layout.item_bonus, parent, false);
        }
        Name currentWord = getItem(position);

        return listItemView;
    }

    CustomFilter filter;

    public void setFilterList(List<Name> filterList) {
        this.filterList = filterList;
    }

    List<Name> filterList;

    @NonNull
    @Override
    public CustomFilter getFilter() {
        return filter;
    }

    public class CustomFilter extends Filter {
        ArrayList<Name> filterList;

        public CustomFilter(ArrayList<Name> filterList) {
            this.filterList = filterList;
        }

        //FILTERING OCCURS
        @Override
        protected FilterResults performFiltering(CharSequence constraint) {
            FilterResults results = new FilterResults();
            //CHECK CONSTRAINT VALIDITY
            if (constraint != null && constraint.length() > 0) {
                //CHANGE TO UPPER
                constraint = constraint.toString().toUpperCase();
                //STORE OUR FILTERED PLAYERS
                ArrayList<Name> filteredPlayers = new ArrayList<>();
                if (filterList != null) {
                    for (int i = 0; i < filterList.size(); i++) {
                        //CHECK
                        try {
                            if (filterList.get(i).getNameName().toUpperCase().contains(constraint)) {
                                //ADD PLAYER TO FILTERED PLAYERS
                                filteredPlayers.add(filterList.get(i));
                            }
                        } catch (Throwable e) {
                            e.printStackTrace();
                        }
                    }
                }
                results.count = filteredPlayers.size();
                results.values = filteredPlayers;
            } else {
                results.count = filterList.size();
                results.values = filterList;
            }
            return results;
        }

        @Override
        protected void publishResults(CharSequence constraint, FilterResults results) {
            clear();
            if (results != null && results.count > 0) {
                add((Name) results.values);
                notifyDataSetChanged();
            }
        }
    }
}

Answer 3

找到一个简单而复杂的解决方案。

SearchView searchView = (SearchView) menuItem.getActionView();
    searchView.setQueryHint("Search All Data!");
    searchView.setOnQueryTextListener (new SearchView.OnQueryTextListener() {
        @Override
        public boolean onQueryTextSubmit(String q) {
            return false;
        }
        @Override
        public boolean onQueryTextChange(String s) {
            if (BUYED_APP == false){
                Toast.makeText(NonDetailDrugActivity.this, "Your are Searching on a Short list of 10 Drugs Only.\nPlease Subscribe to Gain Access to Full Data!", Toast.LENGTH_LONG).show();
            }
            filter = new ArrayList<>();
            filter.clear();
            if (s.length() == 0) {
                filter.addAll(array);
            } else {
                for (Name post : array) {
                    String filterPattern = s.toLowerCase().trim();
                    if (post.getSanskritName().toLowerCase().contains(filterPattern)) {
                        filter.add(post);
                    } else {
                        filter.retainAll(array);
                        if (post.getScientificName().toLowerCase().contains(filterPattern)) {
                            filter.add(post);
                        } else {
                            filter.retainAll(array);
                            if (post.getFamilyName().toLowerCase().contains(filterPattern)) {
                                filter.add(post);
                            } else {
                                filter.retainAll(array);
                                if (post.getOtherName().toLowerCase().contains(filterPattern)) {
                                    filter.add(post);
                                }else {
                                    filter.retainAll(array);
                                    if (post.getAmayikaPrayogam().toLowerCase().contains(filterPattern)) {
                                        filter.add(post);
                                    }else {
                                        filter.retainAll(array);
                                        if (post.getYogas().toLowerCase().contains(filterPattern)) {
                                            filter.add(post);
                                        }else {
                                            filter.retainAll(array);
                                            if (post.getKarma().toLowerCase().contains(filterPattern)) {
                                                filter.add(post);
                                            } else {
                                                filter.retainAll(array);
                                                if (post.getMalayalamNameId().toLowerCase().contains(filterPattern)) {
                                                    filter.add(post);
                                                }
                                            }
                                        }
                                    }
                                }
                            }
                        }
                    }
                }
            }
            adap.clear();
            adap.addAll(filter);
            adap.notifyDataSetChanged();
            return true;
        }
    });
    searchView.setOnCloseListener(new SearchView.OnCloseListener() {
        @Override
        public boolean onClose() {
            clearSearch();
            searchView.onActionViewCollapsed();
            return true;
        }
    });

&

private void clearSearch(){
adap.clear();
filter.clear();
smallaaray();
adap.addAll(array);
adap.notifyDataSetChanged(); }

这样！我让我的搜索成为可能。！非常感谢大家的帮助。

如何使此适配器可搜索？

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