如何在安卓片段工具栏上创建搜索视图?

Question

我正在开发一个应用程序，它从 json 接收数据，我想将搜索视图应用于过滤目的，我已经实现了 onQueryTextChange 和 onQueryTextSubmit 方法.我面临的问题是，当我搜索它不显示任何东西时，我不知道有人在帮助我，请如何实现 searchview。 这是我的片段类

public class Restaurant extends Fragment{
RecyclerView restaurant_recycler;
RestaurantsAdapter adapter;
private ProgressDialog sweetProgressDialog;
SessionManager sessionManager;
List<Restaurant_model> itemrestaurants;
List<String> mAllValues;
private Context mContext;
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setHasOptionsMenu(true);
}
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {

View v = inflater.inflate(R.layout.activity_restaurant, container, false);
restaurant_recycler = (RecyclerView) v.findViewById(R.id.recycler_view_restaurant);
RecyclerView.LayoutManager mLayoutManager = new LinearLayoutManager(getActivity(), LinearLayoutManager.VERTICAL, false);
itemrestaurants = new ArrayList<>();
adapter = new RestaurantsAdapter(getContext(), itemrestaurants);
restaurant_recycler.setLayoutManager(mLayoutManager);
restaurant_recycler.setItemAnimator(new DefaultItemAnimator());
restaurant_recycler.setAdapter(adapter);
sweetProgressDialog = new ProgressDialog(getContext(), R.style.MyAlertDialogStyle);
sessionManager = new SessionManager(getContext());
show_restaurants();
return v;
}
private void show_restaurants() {
RequestQueue queue = Volley.newRequestQueue(getContext());
//        sweetProgressDialog = ProgressDialog.show(NewsFeed.this, "Loading Postss", "Please Wait...",false,false);
StringRequest myReq = new StringRequest(Request.Method.POST,
Config.URL_show_restaurants, new Response.Listener<String>() {
@Override
public void onResponse(String response) {
if (sweetProgressDialog.isShowing()) {
sweetProgressDialog.dismiss();
}
if (response.isEmpty() || response == null || response.equals("0")) {
sweetProgressDialog.dismiss();
Toast.makeText(getActivity(), "Error Loading Restaurants, check your connection.", Toast.LENGTH_LONG).show();
return;
}
try {
//sweetProgressDialog.dismiss();
Log.e("tag", "response " + response);
JSONArray array = new JSONArray(response);
for (int i = 0; i < array.length(); i++)
{
JSONObject thisOBj = (JSONObject) array.get(i);
itemrestaurants.add(new Restaurant_model(thisOBj.getString("id"), thisOBj.getString("name"),
thisOBj.getString("address"),
thisOBj.getString("image")));
}
adapter.notifyDataSetChanged();
} catch (JSONException e) {
if (sweetProgressDialog.isShowing()) {
sweetProgressDialog.dismiss();
}
Log.i("myTag", e.toString());
Toast.makeText(getContext(), "Parsing error", Toast.LENGTH_SHORT).show();
}
}
},
new Response.ErrorListener() {
@Override
public void onErrorResponse(VolleyError error) {
Log.i("myTag", error.toString());
if (sweetProgressDialog.isShowing()) {
sweetProgressDialog.dismiss();
}
Toast.makeText(getContext(), "Server Error", Toast.LENGTH_SHORT).show();
}
}) {

myReq.setRetryPolicy(new DefaultRetryPolicy(
20000, DefaultRetryPolicy.DEFAULT_MAX_RETRIES, DefaultRetryPolicy.DEFAULT_BACKOFF_MULT
));
myReq.setShouldCache(false);
queue.add(myReq);
sweetProgressDialog = new ProgressDialog(getContext());
sweetProgressDialog.setMessage("Loading Restaurants...");
sweetProgressDialog.show();
}
@SuppressLint("ResourceType")
@Override
public void onPrepareOptionsMenu(Menu menu) {
super.onPrepareOptionsMenu(menu);
MenuItem mSearchMenuItem = menu.findItem(R.id.action_search);
SearchManager searchManager = (SearchManager) getActivity().getSystemService(Context.SEARCH_SERVICE);
SearchView searchView = null;
if (mSearchMenuItem != null) {
searchView = (SearchView) mSearchMenuItem.getActionView();
}
if (searchView != null) {
searchView.setSearchableInfo(searchManager.getSearchableInfo(getActivity().getComponentName()));
searchView.setOnQueryTextListener(new SearchView.OnQueryTextListener() {
@Override
public boolean onQueryTextSubmit(String query) {
String result = query;
return true;
}
@Override
public boolean onQueryTextChange(String newText) {
newText = newText.toLowerCase();
List<Restaurant_model> filteredList = new ArrayList<>();
for (Restaurant_model row : itemrestaurants) {
if (row.getRestaurant_name().toLowerCase().contains(newText.toLowerCase()) || row.getRestaurant_address().contains(newText)) {
filteredList.add(row);
}
adapter.setFilter(itemrestaurants);
}
return true;
}
});
}
}
}

Answer 1

你的代码需要一些修复

Function For Filtering:-

private List<Restaurant_model> filtered(String search_query) {
List<Restaurant_model> filteredModelList = new ArrayList<>();
for (Restaurant_model row : itemrestaurants) {
Boolean contains =row.getRestaurant_name().toLowerCase().contains(search_query.toLowerCase()) || row.getRestaurant_address().contains(search_query)
if (contains) {
filteredModelList.add(row);
}
}
return filteredModelList;
}

Function Implementation:-

@Override
public boolean onQueryTextChange(String newText) {
newText = newText.toLowerCase();
List<Restaurant_model> filteredList = filtered(newText);
adapter.setFilter(filteredList);
}
return true;
}

Answer 2

更改代码

@Override
public boolean onQueryTextChange(String newText) {
newText = newText.toLowerCase();
List<Restaurant_model> filteredList = filter(itemrestaurants, newText);
adapter.setFilter(itemrestaurants);
}
return true;
}

添加以下方法

private List<Restaurant_model> filter(List<Restaurant_model> models, String query) {
query = query.toLowerCase();final List<Restaurant_model> filteredModelList = new ArrayList<>();
for (HomeFeedItem model : models) {
final String text = model.getTitle().toLowerCase();
if (text.contains(query)) {
filteredModelList.add(model);
}
}
return filteredModelList;
}

试试这个希望它正在工作