我正在使用本教程添加RecyclerView的本地搜索，其中数据来自webservice。问题是当我搜索某些内容时，只显示前两项。当我搜索某些东西时，每次都会发生这种情况。无论我输入什么，只显示前两项。但是当我清除SearchView时，总列表再次显示哪个是正确的。但为什么实际搜索没有过滤正确的项目？
public class ProductsByCategoryActivity extends AppCompatActivity implements SearchView.OnQueryTextListener {
private RecyclerView recycler;
private ProductsByCatAdapter adapter;
private ArrayList<Model> arrayList = new ArrayList<Model>();
private StaggeredGridLayoutManager gridmanager;
@Override
protected void onCreate(@Nullable Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_productbycategory);
searchview = (SearchView) findViewById(R.id.searchview);
cd = new ConnectionDetector(ProductsByCategoryActivity.this);
recycler = (RecyclerView) findViewById(R.id.recycler);
adapter = new ProductsByCatAdapter(ProductsByCategoryActivity.this, arrayList);
recycler.setHasFixedSize(true);
gridmanager = new StaggeredGridLayoutManager(2, StaggeredGridLayoutManager.VERTICAL);
gridmanager.setGapStrategy(StaggeredGridLayoutManager.GAP_HANDLING_MOVE_ITEMS_BETWEEN_SPANS);
recycler.setLayoutManager(gridmanager);
recycler.setItemAnimator(null);
recycler.setAdapter(adapter);
searchview.setIconifiedByDefault(false);
searchview.setOnQueryTextListener(this);
searchview.setSubmitButtonEnabled(true);
searchview.setQueryHint("Search Here");
String URL = Utility.PRODBYEVERYTHING;
prepareData(URL);
}
private void prepareData(final String URL) {
if (arrayList != null) arrayList.clear();
StringRequest stringRequest = new StringRequest(Request.Method.GET, URL,
new Response.Listener<String>() {
@Override
public void onResponse(String response) {
System.out.println("sammy_ProductsByCategoryActivity_response " + response);
try {
JSONObject jObj = new JSONObject(response);
if (jObj.getInt("ACK") == 1) {
JSONArray jsonArray = jObj.getJSONArray("all_products");
for (int i = 0; i < jsonArray.length(); i++) {
JSONObject main = jsonArray.getJSONObject(i);
Model home = new Model();
home.setTitle(main.getString("name"));
home.setImage(main.getString("image"));
home.setPrdid(main.getString("product_id"));
home.setUserid(main.getString("user_id"));
arrayList.add(home);
}
}
adapter.notifyDataSetChanged();
} catch (JSONException e) {
System.out.println("sammy_JSONError " + e);
}
}
}, new Response.ErrorListener() {
@Override
public void onErrorResponse(VolleyError error) {
if (error instanceof TimeoutError) {
Toast.makeText(ProductsByCategoryActivity.this, getString(R.string.tooslow), Toast.LENGTH_LONG).show();
} else if (error instanceof NoConnectionError) {
Toast.makeText(ProductsByCategoryActivity.this, getString(R.string.nointernet), Toast.LENGTH_LONG).show();
} else if (error instanceof AuthFailureError) {
System.out.println("sammy_AuthFailureError " + error);
} else if (error instanceof ServerError) {
System.out.println("sammy_ServerError " + error);
} else if (error instanceof NetworkError) {
System.out.println("sammy_NetworkError " + error);
} else if (error instanceof ParseError) {
System.out.println("sammy_ParseError " + error);
}
}
});
RequestQueue requestQueue = Volley.newRequestQueue(ProductsByCategoryActivity.this);
requestQueue.add(stringRequest);
stringRequest.setRetryPolicy(new DefaultRetryPolicy(
10000,
DefaultRetryPolicy.DEFAULT_MAX_RETRIES,
DefaultRetryPolicy.DEFAULT_BACKOFF_MULT));
}
@Override
public boolean onQueryTextSubmit(String query) {
return false;
}
@Override
public boolean onQueryTextChange(String newText) {
adapter.getFilter().filter(newText);
return true;
}
}
public class ProductsByCatAdapter extends RecyclerView.Adapter<ProductsByCatAdapter.MyViewHolder> implements Filterable {
private List<Model> arrayList;
private List<Model> mFilteredList;
private Context context;
private SharedPref pref;
public ProductsByCatAdapter(Context context, List<Model> arrayList) {
this.arrayList = arrayList;
this.mFilteredList = arrayList;
this.context = context;
pref = new SharedPref(context);
}
@Override
public MyViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {
View itemView = LayoutInflater.from(parent.getContext()).inflate(R.layout.rowlayout, parent, false);
return new MyViewHolder(itemView);
}
@Override
public Filter getFilter() {
return new Filter() {
@Override
protected FilterResults performFiltering(CharSequence charSequence) {
String charString = charSequence.toString();
if (charString.isEmpty()) {
mFilteredList = arrayList;
} else {
ArrayList<Model> filteredList = new ArrayList<>();
for (Model item : arrayList) {
if (item.getTitle().toLowerCase().contains(charString)) {
filteredList.add(item);
}
}
mFilteredList = filteredList;
}
FilterResults filterResults = new FilterResults();
filterResults.values = mFilteredList;
return filterResults;
}
@Override
protected void publishResults(CharSequence charSequence, FilterResults filterResults) {
mFilteredList = (ArrayList<Model>) filterResults.values;
notifyDataSetChanged();
}
};
}
@Override
public void onBindViewHolder(final MyViewHolder holder, int position) {
Model model = arrayList.get(position);
holder.name.setText(model.getTitle());
if (!TextUtils.isEmpty(model.getImage()))
Glide.with(context).load(model.getImage()).placeholder(R.drawable.defaultplaceholder).into(holder.image);
}
@Override
public int getItemCount() {
return mFilteredList.size();
}
class MyViewHolder extends RecyclerView.ViewHolder implements View.OnClickListener {
TextView name;
ImageView image;
RelativeLayout relativeLayout;
MyViewHolder(View view) {
super(view);
name = (TextView) view.findViewById(R.id.titletxt);
image = (ImageView) view.findViewById(R.id.image);
relativeLayout = (RelativeLayout) view.findViewById(R.id.RL);
relativeLayout.setOnClickListener(this);
}
@Override
public void onClick(View view) {
switch (view.getId()) {
case R.id.RL:
int pos = getAdapterPosition();
String prdid = arrayList.get(pos).getPrdid();
String userid = arrayList.get(pos).getUserid();
System.out.println("sammy_ProductsByCatAdapter_prdid " + prdid);
System.out.println("sammy_ProductsByCatAdapter_userid " + userid);
if (userid.equals(pref.getString(Utility.USERID))) {
Intent intent = new Intent(context, MyProductDetailsActivity.class);
intent.putExtra("prdid", prdid);
context.startActivity(intent);
} else {
Intent intent = new Intent(context, OtherProductDetailsActivity.class);
intent.putExtra("prdid", prdid);
context.startActivity(intent);
}
break;
}
}
}
}
答案 0 :(得分：4)
更改
Model model = arrayList.get(position);
到
Model model = mFilteredList.get(position);
答案 1 :(得分：0)
我认为你没有在ProductsByCatAdapter类
中使用replace调用filter类 public ProductsByCatAdapter(Context context, List<Model> arrayList) {
this.arrayList = arrayList;
this.mFilteredList = arrayList;
this.context = context;
pref = new SharedPref(context);
// add below line
getFilter();
}