RecyclerView列表項(xiàng)快速搜索實(shí)現(xiàn)

要實(shí)現(xiàn)RecyclerView列表項(xiàng)的快速搜索功能，可以通過(guò)以下步驟實(shí)現(xiàn)：

1. 首先，在RecyclerView的Adapter中添加一個(gè)過(guò)濾器(Filter)來(lái)實(shí)現(xiàn)搜索功能。可以創(chuàng)建一個(gè)內(nèi)部類來(lái)擴(kuò)展Filter類，重寫performFiltering()方法和publishResults()方法。

public class MyAdapter extends RecyclerView.Adapter<MyAdapter.ViewHolder> implements Filterable {

    private List<String> data;
    private List<String> filteredData;

    public MyAdapter(List<String> data) {
        this.data = data;
        this.filteredData = new ArrayList<>(data);
    }

    @Override
    public Filter getFilter() {
        return new Filter() {
            @Override
            protected FilterResults performFiltering(CharSequence constraint) {
                List<String> filteredList = new ArrayList<>();
                if (constraint == null || constraint.length() == 0) {
                    filteredList.addAll(data);
                } else {
                    String filterPattern = constraint.toString().toLowerCase().trim();
                    for (String item : data) {
                        if (item.toLowerCase().contains(filterPattern)) {
                            filteredList.add(item);
                        }
                    }
                }
                FilterResults results = new FilterResults();
                results.values = filteredList;
                return results;
            }

            @Override
            protected void publishResults(CharSequence constraint, FilterResults results) {
                filteredData.clear();
                filteredData.addAll((List<String>) results.values);
                notifyDataSetChanged();
            }
        };
    }

    // Adapter中的其他方法
}

2. 在Activity或Fragment中設(shè)置RecyclerView的Adapter和LayoutManager，并添加一個(gè)搜索框用來(lái)輸入搜索關(guān)鍵詞。

public class MainActivity extends AppCompatActivity {

    private RecyclerView recyclerView;
    private EditText searchEditText;
    private MyAdapter adapter;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);

        recyclerView = findViewById(R.id.recyclerView);
        searchEditText = findViewById(R.id.searchEditText);

        List<String> data = new ArrayList<>();
        // 添加數(shù)據(jù)到data

        adapter = new MyAdapter(data);
        recyclerView.setAdapter(adapter);
        recyclerView.setLayoutManager(new LinearLayoutManager(this));

        searchEditText.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) {
                adapter.getFilter().filter(s);
            }

            @Override
            public void afterTextChanged(Editable s) {

            }
        });
    }
}

3. 這樣就可以在搜索框中輸入關(guān)鍵詞，RecyclerView的列表項(xiàng)會(huì)根據(jù)關(guān)鍵詞進(jìn)行過(guò)濾顯示。當(dāng)搜索框內(nèi)容發(fā)生變化時(shí)，調(diào)用Adapter的getFilter().filter(s)方法即可觸發(fā)過(guò)濾器進(jìn)行過(guò)濾操作。