我的应用程序从服务器获取数据，我在listview中显示它我想在其中添加过滤器/搜索功能。所以我在baseadapter中使用了filterable。我在控制台中收到服务器的响应，但listview中没有显示任何内容。请在我的代码中指导我什么不对。
这是适配器类
public class Patient_Adapter extends BaseAdapter implements Filterable{
Activity context;
String[] name, age, number, dip_rate;
//for filtering use arraylists
LayoutInflater inflater;
private ValueFilter valueFilter;
ArrayList<ArrayList_get_set> arrayList;
private ArrayList<ArrayList_get_set> StringFilterList;
public Patient_Adapter(Activity applicationContext,
ArrayList<ArrayList_get_set> arrayList) {
this.context = applicationContext;
/////
this.arrayList = arrayList;
StringFilterList = arrayList;
this.inflater = (LayoutInflater)
context.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
getFilter();
}
@Override
public int getCount() {
return arrayList.size();
}
@Override
public Object getItem(int i) {
return arrayList.get(i).getName();
}
@Override
public long getItemId(int i) {
return 0;
}
private class Viewholder{
TextView name_
,age_
,number_
,dip_rate_
,tv_request_number;
}
@Override
public View getView(final int position, View view, ViewGroup viewGroup) {
Viewholder viewholder;
LayoutInflater inflater = context.getLayoutInflater();
if (view == null){
viewholder = new Viewholder();
view = inflater.inflate(R.layout.patient_item_list,null);
viewholder.tv_request_number = (TextView)
view.findViewById(R.id.s_req_num);
viewholder.name_ = (TextView) view.findViewById(R.id.name);
viewholder.age_ = (TextView) view.findViewById(R.id.age);
viewholder.number_ = (TextView) view.findViewById(R.id.number);
viewholder.dip_rate_ = (TextView) view.findViewById(R.id.dip_rate);
view.setTag(viewholder);
}
else {
viewholder = (Viewholder) view.getTag();
}
// set the value in TextView
viewholder.tv_request_number.setText((name.length-position)+".");
viewholder.name_.setText(name[position]);
viewholder.age_.setText(age[position]);
viewholder.number_.setText(number[position]);
viewholder.dip_rate_.setText(dip_rate[position]);
return view;
}
//Filter Results
@Override
public Filter getFilter() {
if(valueFilter==null) {
valueFilter=new ValueFilter();
}
return valueFilter;
}
private class ValueFilter extends Filter {
//Invoked in a worker thread to filter the data according to the
constraint.
@Override
protected FilterResults performFiltering(CharSequence constraint) {
FilterResults results = new FilterResults();
if(constraint != null && constraint.length()>0){
ArrayList<ArrayList_get_set> filterList = new ArrayList<>();
for(int i=0;i<StringFilterList.size();i++){
if((StringFilterList.get(i).getName().toUpperCase())
.contains(constraint.toString().toUpperCase())) {
ArrayList_get_set contacts = new ArrayList_get_set();
contacts.setName(StringFilterList.get(i).getName());
filterList.add(contacts);
}
}
results.count=filterList.size();
results.values=filterList;
}else{
results.count=StringFilterList.size();
results.values=StringFilterList;
}
return results;
}
//Invoked in the UI thread to publish the filtering results in the user
interface.
@SuppressWarnings("unchecked")
@Override
protected void publishResults(CharSequence constraint,
FilterResults results) {
arrayList = (ArrayList<ArrayList_get_set>) results.values;
notifyDataSetChanged();
}
}
}
这是getset类
public class ArrayList_get_set {
String name
,age
,number
,dip_rate;
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
public String getAge() {
return age;
}
public void setAge(String age) {
this.age = age;
}
public String getNumber() {
return number;
}
public void setNumber(String number) {
this.number = number;
}
public String getDip_rate() {
return dip_rate;
}
public void setDip_rate(String dip_rate) {
this.dip_rate = dip_rate;
}
}
这是我的主要活动
private ArrayList<ArrayList_get_set> arrayList = new
ArrayList<ArrayList_get_set>();
boolean server_check=false;
Patient_Adapter patient_adapter;
ListView simListView;
EditText search;
String[] name
,age
,number
,dip_rate;
String server_response="0"
,server_response_text
,d_number;
JSONObject jp_obj;
JSONArray jar_array;
@Nullable
@Override
public View onCreateView(LayoutInflater inflater, @Nullable ViewGroup
container, @Nullable Bundle savedInstanceState) {
View v = inflater.inflate(R.layout.patient_history, container,
false );
simListView = (ListView) v.findViewById(R.id.list);
search = (EditText) v.findViewById(R.id.et_search);
//Getting Client Number from SharedPreferences
SharedPreferences preferences =
this.getActivity().getSharedPreferences("DataStore" , Context.MODE_PRIVATE);
d_number = preferences.getString("number", "Ni Mila Kuch");
if(new Check_internet_connection(getActivity()).isNetworkAvailable()){
new GetPatientsList().execute();
}
else {
Toast.makeText(getActivity(),
"Check your Internet Connection & Try again",
Toast.LENGTH_LONG).show();
}
return v;
}
//load questions
public class GetPatientsList extends AsyncTask<String, Void, String> {
ProgressDialog progressDialog;
@Override
protected void onPreExecute() {
progressDialog = new ProgressDialog(getActivity());
progressDialog.setTitle("Loading! Be Patient!");
progressDialog.setCancelable(false);
progressDialog.show();
}
@Override
protected String doInBackground(String... params) {
try {
JSONObject obj = new JSONObject();
obj.put("operation", "patients");
obj.put("d_number", d_number);
JsonParser jp = new JsonParser();
String str_req = jp.multipartFormRequestForFindFriends(Url.ulr,
"UTF-8", obj, null);
jp_obj = new JSONObject(str_req);
jar_array = jp_obj.getJSONArray("JsonData");
JSONObject c;
name = new String[(jar_array.length()-1)];
age = new String[(jar_array.length()-1)];
number = new String[(jar_array.length()-1)];
dip_rate = new String[(jar_array.length()-1)];
c = jar_array.getJSONObject(0);
if (c.length() > 0) {
server_response = c.getString("response");
if (server_response.equals("0")) {
server_response_text = c.getString("response-text");
}
}
int j = 1;
if (server_response.equals("1")) {
for (int i = 0; j < jar_array.length(); i++) {
c = jar_array.getJSONObject(j);
if (c.length() > 0) {
name[i] = c.getString("name");
age[i] = c.getString("age");
number[i] = c.getString("number");
dip_rate[i] = c.getString("dip_rate");
}
j++;
}
}
server_check = true;
} catch (Exception e) {
e.printStackTrace();
}
return null;
}
@Override
protected void onPostExecute(String s) {
progressDialog.dismiss();
if (server_check) {
if (server_response.equals("1")) {
if (name.length > 0) {
Toast.makeText(getActivity(), arrayList.size(),
Toast.LENGTH_SHORT).show();
patient_adapter = new Patient_Adapter(getActivity(),
arrayList);
simListView.setAdapter(patient_adapter);
//filtering data
search.addTextChangedListener(new TextWatcher() {
@Override
public void beforeTextChanged(CharSequence
charSequence, int i, int i1, int i2) {
patient_adapter.getFilter().filter(charSequence);
}
@Override
public void onTextChanged(CharSequence charSequence,
int i, int i1, int i2) {
}
@Override
public void afterTextChanged(Editable editable) {
}
});
} else {
Toast.makeText(getActivity(), server_response_text,
Toast.LENGTH_SHORT).show();
}
} else {
Toast.makeText(getActivity(), "Error while loading data",
Toast.LENGTH_SHORT).show();
}
}
}
}
@Override
public void onViewCreated(View view, @Nullable Bundle savedInstanceState) {
super.onViewCreated(view, savedInstanceState);
//you can set the title for your toolbar here for different fragments
different titles
getActivity().setTitle("Patient History");
}
}
答案 0 :(得分：0)
viewholder.name_.setText(arrayList.get(position).getName());
从ArrayList获取。
答案 1 :(得分：0)
试试这个。
getView（）中的使用此
viewholder.tv_request_number.setText((arrayList.size()-position)+".");
viewholder.name_.setText(arrayList.get(position).getName());
viewholder.age_.setText(arrayList.get(position).getAge());
viewholder.number_.setText(arrayList.get(position).getNumber());
viewholder.dip_rate_.setText(arrayList.get(position).getDip_rate());
然后更新
@Override
public Object getItem(int i) {
return arrayList.get(i);
}