Я получаю данные с сервера, используя JSON, и когда я пытаюсь выполнить поиск в просмотре списка, он просто обновляет весь список и не рассказывает его, но когда я отлаживаю, я вижу, что результат на getfilter верен и у него drugsFiltered = (ArrayList<drugs_json_data>) results.values; есть отфильтрованные данные. только listview.setadaptor выполняется внутри onPostExecute асинхронной задачи.
вот мой код адаптера:
public class drugs_adaptor_listView extends ArrayAdapter<drugs_json_data> implements Filterable {
ArrayList<drugs_json_data> drugs;
ArrayList<drugs_json_data> drugsFiltered;
Context context;
int resource;
public drugs_adaptor_listView(Context context, int resource, ArrayList<drugs_json_data> drugs) {
super(context, resource, drugs);
this.drugs = drugs;
this.drugsFiltered = drugs;
this.context = context;
this.resource = resource;
}
@NonNull
@Override
public View getView(int position, View convertView, ViewGroup parent) {
View r = convertView;
ViewHolder viewHolder;
if (r == null) {
LayoutInflater layoutInflater = (LayoutInflater) getContext().getSystemService(Activity.LAYOUT_INFLATER_SERVICE);
r = layoutInflater.inflate(R.layout.row_layout_drugs, null, true);
viewHolder = new ViewHolder(r);
r.setTag(viewHolder);
} else {
viewHolder = (ViewHolder) r.getTag();
}
drugs_json_data drugs_json_data = getItem(position);
viewHolder.txtDrugId.setText(drugs_json_data.getDrugId());
viewHolder.txtDrugName.setText(drugs_json_data.getDrugName());
viewHolder.txtDrugCategory.setText(drugs_json_data.getDrugCategory());
Picasso builder = new Picasso.Builder(context).build();
builder.load(drugs_json_data.getDrugImage()).memoryPolicy(MemoryPolicy.NO_STORE).placeholder(R.drawable.ic_launcher_foreground).into(viewHolder.imageView);
return r;
}
@NonNull
@Override
public Filter getFilter() {
Filter filter = new Filter() {
@SuppressWarnings("unchecked")
@Override
protected void publishResults(CharSequence constraint, FilterResults results) {
drugsFiltered = (ArrayList<drugs_json_data>) results.values; // has the filtered values
if (results.count>0) {
notifyDataSetChanged(); // notifies the data with new filtered values
}else {
notifyDataSetInvalidated();
}
}
@Override
protected FilterResults performFiltering(CharSequence constraint) {
FilterResults results = new FilterResults(); // Holds the results of a filtering operation in values
ArrayList<drugs_json_data> FilteredArrList = new ArrayList<>();
if (drugs == null) {
drugs = new ArrayList<>(drugsFiltered); // saves the original data in mOriginalValues
}
if (constraint == null || constraint.length() == 0) {
// set the Original result to return
results.count = drugs.size();
results.values = drugs;
} else {
constraint = constraint.toString().toLowerCase();
for (int i = 0; i < drugs.size(); i++) {
String data = drugs.get(i).getDrugName();
if (data.startsWith(constraint.toString())) {
FilteredArrList.add(new drugs_json_data(drugs.get(i).getDrugId(), drugs.get(i).getDrugName(), drugs.get(i).getDrugCategory(), drugs.get(i).getDrugImage()));
}
}
// set the Filtered result to return
results.count = FilteredArrList.size();
results.values = FilteredArrList;
}
return results;
}
};
return filter;
}
class ViewHolder {
TextView txtDrugId, txtDrugName, txtDrugCategory;
ImageView imageView;
ViewHolder(View v) {
txtDrugId = v.findViewById(R.id.txtDrugId);
txtDrugName = v.findViewById(R.id.txtDrugName);
txtDrugCategory = v.findViewById(R.id.txtDrugCat);
imageView = v.findViewById(R.id.ImageViewDrug);
}
}
}
вот модель данных:
public class drugs_json_data {
private String drugImage;
private String drugName;
private String drugCategory;
private String drugId;
public drugs_json_data(String drugImage, String drugName, String drugCategory, String drugId) {
this.drugImage = drugImage;
this.drugName = drugName;
this.drugCategory = drugCategory;
this.drugId = drugId;
}
public String getDrugImage() {
return this.drugImage;
}
public void setDrugImage(String drugImage) {
this.drugImage = drugImage;
}
public String getDrugName() {
return this.drugName;
}
public void setDrugName(String drugName) {
this.drugName = drugName;
}
public String getDrugCategory() {
return this.drugCategory;
}
public void setDrugCategory(String drugCategory) {
this.drugCategory = drugCategory;
}
public String getDrugId() {
return this.drugId;
}
public void setDrugId(String drugId) {
this.drugId = drugId;
}
}
и вот основной код активности:
public class clerk_drugs extends AppCompatActivity {
ListView listView;
Button createDrug;
String drug_id, json_drug;
TextView noMed;
EditText searchTxt;
JSONObject jsonObject;
JSONArray jsonArray;
ArrayList<drugs_json_data> arrayList;
drugs_adaptor_listView adapter;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_clerk_drugs);
createDrug = findViewById(R.id.create_drug);
arrayList = new ArrayList<>();
listView = findViewById(R.id.list_drugs);
noMed = findViewById(R.id.no_med);
searchTxt = findViewById(R.id.listSearch);
searchTxt.setSingleLine(true);
runOnUiThread(new Runnable() {
@Override
public void run() {
try {
new ReadJSON().execute("http://(mylink)").get();
} catch (ExecutionException e) {
e.printStackTrace();
} catch (InterruptedException e) {
e.printStackTrace();
}
}
});
try {
jsonObject = new JSONObject(json_drug);
jsonArray = jsonObject.getJSONArray("server_response");
} catch (JSONException e) {
e.printStackTrace();
}
listView.setOnItemClickListener(new AdapterView.OnItemClickListener() {
@Override
public void onItemClick(AdapterView<?> parent, View view, int position, long id) {
drug_id = ((TextView) view.findViewById(R.id.txtDrugId)).getText().toString();
for (int i = 0; i<jsonArray.length(); i++){
try {
JSONObject jobj = jsonArray.getJSONObject(i);
String drugid = jobj.getString("drug_id");
if(drugid.equals(drug_id)) {
String drugname = jobj.getString("drug_name");
String drugcategory = jobj.getString("drug_category");
String drugdescription = jobj.getString("drug_description");
String drugphoto = jobj.getString("drug_photo");
drug_update_dialog drug_update_dialog = new drug_update_dialog();
Bundle args = new Bundle();
args.putString("drug-id", drug_id);
args.putString("drug-name", drugname);
args.putString("drug-category", drugcategory);
args.putString("drug-description", drugdescription);
args.putString("drug_photo",drugphoto);
drug_update_dialog.setArguments(args);
drug_update_dialog.show(getSupportFragmentManager(),"ویرایش اطلاعات دارو");
}
} catch (JSONException e) {
e.printStackTrace();
}
}
}
});
searchTxt.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.toString());
}
@Override
public void afterTextChanged(Editable s) {
}
});
searchTxt.setOnFocusChangeListener(new View.OnFocusChangeListener() {
@Override
public void onFocusChange(View v, boolean hasFocus) {
if(!hasFocus){
hideKeyboard(v);
}
}
});
}
public void hideKeyboard(View view) {
InputMethodManager inputMethodManager =(InputMethodManager) this.getSystemService(Activity.INPUT_METHOD_SERVICE);
inputMethodManager.hideSoftInputFromWindow(view.getWindowToken(), 0);
}
class ReadJSON extends AsyncTask<String, Integer, String>{
@Override
protected String doInBackground(String... params) {
return readURL(params[0]);
}
@Override
protected void onPostExecute(String content) {
try {
JSONObject jsonObject = new JSONObject(content);
JSONArray jsonArray = jsonObject.getJSONArray("server_response");
for(int i=0; i<jsonArray.length();i++){
JSONObject drugObj = jsonArray.getJSONObject(i);
arrayList.add(new drugs_json_data(
drugObj.getString("drug_photo"),
drugObj.getString("drug_name"),
drugObj.getString("drug_category"),
drugObj.getString("drug_id")
));
}
} catch (JSONException e) {
e.printStackTrace();
}
adapter = new drugs_adaptor_listView(
getApplicationContext(), R.layout.row_layout_drugs, arrayList
);
listView.setAdapter(adapter);
listView.setTextFilterEnabled(true);
if (adapter.getCount()==0){
noMed.setVisibility(View.VISIBLE);
}
}
}
private String readURL(String theURL) {
StringBuilder content = new StringBuilder();
try{
URL url = new URL(theURL);
URLConnection urlConnection = url.openConnection();
BufferedReader bufferedReader = new BufferedReader(new InputStreamReader(urlConnection.getInputStream()));
String line;
while((line=bufferedReader.readLine())!=null){
content.append(line).append("\n");
}
bufferedReader.close();
}catch (Exception e){
e.printStackTrace();
}
json_drug = content.toString();
return content.toString();
}
@Override
public void onBackPressed() {
finish();
Intent intent = new Intent(this,patient_mainPage.class);
startActivity(intent);
}
public void createDrugDialog(View view){
openDrugDialog();
}
private void openDrugDialog() {
drug_add_dialog drug_add_dialog = new drug_add_dialog();
drug_add_dialog.show(getSupportFragmentManager(),"ثبت داروی جدید");
}
}
Буду признателен, если кто-нибудь сможет помочь.