使用EditText筛选回收视图

Question

我有这个应用程序，它从MySql数据库中检索数据并将其解析为回收器视图。我有一个editText，我希望能够在键入时过滤回收器视图项目。

下面是我的主要活动(SearchAvtivity):

public class SearchActivity extends AppCompatActivity {
    private static final String TAG = "Search Activity";
    private Context mContext = SearchActivity.this;
    private static final int ACTIVITY_NUM = 1;

    String urlAddress = "myDatabaseAddressGoesHere.PHP";


    @Override
    protected void onCreate(@Nullable Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_search);
        Log.d(TAG, "onCreate: started");
        setupBottomNavigationView();
        final RecyclerView rv = (RecyclerView) findViewById(R.id.SearchRv);
        rv.setLayoutManager(new LinearLayoutManager(this));
        rv.setItemAnimator(new DefaultItemAnimator());
        Downloader dl = new Downloader(SearchActivity.this,urlAddress,rv);
        dl.execute();
     }
          
         

    /**
     * Setup Bottom Navigation View
     */

    private void setupBottomNavigationView(){
        Log.d(TAG, "setupBottomNavigationView: Setting up Bottom Navigation View");
        BottomNavigationViewEx bottomNavigationViewEx = (BottomNavigationViewEx)findViewById(R.id.bottom_nav_bar);
        BottomNavigationViewHelper.setupBottomNavigationView(bottomNavigationViewEx);
        BottomNavigationViewHelper.enableNavigation(mContext,bottomNavigationViewEx);
        Menu menu = bottomNavigationViewEx.getMenu();
        MenuItem menuItem = menu.getItem(ACTIVITY_NUM);
        menuItem.setChecked(true);

    }
}

这是MyAdapter：

public class MyAdapter extends RecyclerView.Adapter<MyHolder> {

    Context c;
    ArrayList<SpaceCraft> spaceCrafts;
    List<MyHolder> displayedList;

    public MyAdapter(Context c, ArrayList<SpaceCraft> spaceCrafts) {
        this.c = c;
        this.spaceCrafts = spaceCrafts;
    }

    @Override
    public MyHolder onCreateViewHolder(ViewGroup parent, int viewType) {
        View v = LayoutInflater.from(parent.getContext()).inflate(R.layout.search_adapter_vertical,parent,false);
        return new MyHolder(v);
    }

    @Override
    public void onBindViewHolder(MyHolder holder, int position) {
        holder.nameTv.setText(spaceCrafts.get(position).getName());
        holder.addressTv.setText(spaceCrafts.get(position).getAddress());
        holder.phoneTv.setText(spaceCrafts.get(position).getPhone());
        holder.emailTv.setText(spaceCrafts.get(position).getEmail());

    }

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

Ido不知道您是否需要查看vlasses：下载器，解析器，连接器或支架。我请告诉我。

Answer 1

您应该为RecyclerView使用TextWatcher()。

Answer 2

您可以在editText上使用TextWatcher执行此操作，并在其中过滤您的列表。

例：

 ((EditText) findViewById(R.id.your_edit_text)).addTextChangedListener(new TextWatcher() {
    @Override
    public void onTextChanged(CharSequence s, int start, int before, int count) {
    }

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

    @Override
    public void afterTextChanged(Editable s) {
        String text = s.toString();
        ArrayList<String> yourCopyList = new ArrayList<>(yourList)
        yourList.clear();
        if (text.isEmpty()) {
            addAllYourDataToList();
        } else {
            text = text.toLowerCase();
            for (int i = 0; i<yourCopyList.size(); i++) {
                // Adapt the if for your usage
                if (yourCopyList.get(i).getName().toLowerCase().contains(text)) {
                    yourList.add("the string");
                }
            }
        }
        adapter.notifyDataSetChanged();
    }
});

在此示例中，您将删除列表中的所有数据，并仅添加文本筛选器上对应的数据