カスタムListViewのフィルタ機能がアンドロイドで動作しない

Question

私はアンドロイドに初心者で、カスタムアダプタでカスタムlistViewを操作しています。私はlistviewとedittextを持っています。これを使用して検索機能を追加したいと思います。リストビューの入力に応じてフィルタリングされなければならない、私は以下のように試してみました、誰かが私がこれを解決するのに役立つ可能性があり、

BusAdapter

public class BusAdapter extends BaseAdapter implements Filterable{ 
    public ArrayList<Bus> BusArray; 
    private Context mContext; 
    // Original Values 
    private ArrayList<Bus> mDisplayedValues; 


    public BusAdapter(Context paramContext, ArrayList<Bus> BusArray) { 
     this.mContext = paramContext; 
     this.mDisplayedValues = BusArray; 
     this.BusArray = BusArray; 

    } 

    public int getCount() { 
     return this.BusArray.size(); 
    } 

    public Object getItem(int paramInt) { 
     return Integer.valueOf(paramInt); 
    } 

    public long getItemId(int paramInt) { 
     return paramInt; 
    } 

    public View getView(final int paramInt, View paramView, ViewGroup paramViewGroup) { 
     LayoutInflater localLayoutInflater = (LayoutInflater) this.mContext.getSystemService("layout_inflater"); 
     Viewholder localViewholder = null; 
     if (paramView == null) { 
      paramView = localLayoutInflater.inflate(R.layout.raw_bus, paramViewGroup, false); 
      localViewholder = new Viewholder(); 

      localViewholder.tv_rtname = ((TextView) paramView.findViewById(R.id.tv_rtname)); 
      localViewholder.tv_from = ((TextView) paramView.findViewById(R.id.tv_from)); 
      localViewholder.tv_to = ((TextView) paramView.findViewById(R.id.tv_to)); 
      localViewholder.tv_freq = ((TextView) paramView.findViewById(R.id.tv_fr)); 


      paramView.setTag(localViewholder); 

     } else { 

      localViewholder = (Viewholder) paramView.getTag(); 
     } 
     localViewholder.tv_from 
       .setText(BusArray.get(paramInt).getRoute_from()); 
     localViewholder.tv_to 
       .setText(BusArray.get(paramInt).getRoute_to()); 
     localViewholder.tv_rtname 
       .setText(BusArray.get(paramInt).getRoute_name()); 

     return paramView; 
    } 

    @Override 
    public Filter getFilter() { 
     Filter filter = new Filter() { 

      @SuppressWarnings("unchecked") 
      @Override 
      protected void publishResults(CharSequence constraint,FilterResults results) { 

       mDisplayedValues = (ArrayList<Bus>) results.values; // has the filtered values 
       notifyDataSetChanged(); // notifies the data with new filtered values 
      } 

      @Override 
      protected FilterResults performFiltering(CharSequence constraint) { 
       FilterResults results = new FilterResults();  // Holds the results of a filtering operation in values 
       ArrayList<Bus> FilteredArrList = new ArrayList<Bus>(); 

       if (BusArray == null) { 
        BusArray = new ArrayList<Bus>(mDisplayedValues); // saves the original data in mOriginalValues 
       } 

       /******** 
       * 
       * If constraint(CharSequence that is received) is null returns the mOriginalValues(Original) values 
       * else does the Filtering and returns FilteredArrList(Filtered) 
       * 
       ********/ 
       if (constraint == null || constraint.length() == 0) { 

        // set the Original result to return 
        results.count = BusArray.size(); 
        results.values = BusArray; 
       } else { 
        constraint = constraint.toString().toLowerCase(); 
        for (int i = 0; i < BusArray.size(); i++) { 
         String data = BusArray.get(i).getRoute_name(); 
         if (data.toLowerCase().startsWith(constraint.toString())) { 
          FilteredArrList.add(new Bus(BusArray.get(i).route_id,BusArray.get(i).route_name,BusArray.get(i).route_details,BusArray.get(i).route_from,BusArray.get(i).route_to)); 
         } 
        } 
        // set the Filtered result to return 
        results.count = FilteredArrList.size(); 
        results.values = FilteredArrList; 
       } 
       return results; 
      } 
     }; 
     return filter; 
    } 
//get filter 



    //end 

    static class Viewholder { 
     TextView tv_from; 
     TextView tv_to; 
     TextView tv_rtname; 
     TextView tv_freq; 

    } 

} 

活動

public class BusTimingActivity extends AppCompatActivity { 
    ListView lv_bus; 
    ArrayList<Bus> busList; 
    ProgressDialog pDialog; 
    InputStream inputStream = null; 
    String result; 
    BusAdapter adapter; 

    EditText et_search; 

    @Override 
    protected void onCreate(Bundle savedInstanceState) { 
     super.onCreate(savedInstanceState); 
     requestWindowFeature(Window.FEATURE_NO_TITLE); 
     setContentView(R.layout.activity_bus_timings); 
     lv_bus = (ListView)findViewById(R.id.lv_bus); 
     et_search = (EditText)findViewById(R.id.et_search); 
     busList = new ArrayList<>(); 

     et_search.addTextChangedListener(new TextWatcher() { 

      @Override 
      public void onTextChanged(CharSequence cs, int arg1, int arg2, int arg3) { 
       // When user changed the Text 
       adapter.getFilter().filter(cs.toString()); 

      } 

      @Override 
      public void beforeTextChanged(CharSequence arg0, int arg1, int arg2, 
              int arg3) { 
       // TODO Auto-generated method stub 

      } 

      @Override 
      public void afterTextChanged(Editable arg0) { 
       // TODO Auto-generated method stub 
      } 
     }); 
     new GETBUSROUTES().execute(); 

    } 
//GET ALL BUS ROUTES.. 
public class GETBUSROUTES extends AsyncTask<Void, Void, Void> { 

    StringEntity se; 
    String url; 

    @Override 
    protected void onPreExecute() { 
     super.onPreExecute(); 
     busList.clear(); 
     pDialog = new ProgressDialog(BusTimingActivity.this); 
     pDialog.setMessage("Please wait..."); 
     pDialog.setCancelable(false); 
     pDialog.show(); 
     busList.clear(); 

    } 

    @Override 
    protected Void doInBackground(Void... params) { 
     url = Const.API_URL; 

     HttpClient httpClient = new DefaultHttpClient(); 


     HttpPost httpPost = new HttpPost(url); 
     List<NameValuePair> valueparams = new ArrayList<NameValuePair>(); 
     valueparams.add(new BasicNameValuePair("form_type", "all_bus_routes")); 
     try { 
      httpPost.setEntity(new UrlEncodedFormEntity(valueparams)); 
     } catch (UnsupportedEncodingException e) { 
      e.printStackTrace(); 
     } 

     String json = ""; 

     //getting string entity to http..!!! 

     try { 

      HttpResponse httpResponse = httpClient.execute(httpPost); 
      inputStream = httpResponse.getEntity().getContent(); 
      if (inputStream != null) { 
       BufferedReader r = new BufferedReader(new InputStreamReader(inputStream)); 
       StringBuilder total = new StringBuilder(); 
       String line; 
       while ((line = r.readLine()) != null) { 
        total.append(line).append('\n'); 
       } 
       result = total.toString(); 
       try { 
        JSONArray results = new JSONArray(result); 
        for (int i = 0; i<results.length() ; i++) { 
         JSONObject c = results.getJSONObject(i); 
         Bus bus = new Bus(); 
         bus.setRoute_id(c.getString("route_id")); 
         bus.setRoute_details(c.getString("route_details")); 
         bus.setRoute_from(c.getString("route_from")); 
         bus.setRoute_to(c.getString("route_to")); 
         bus.setRoute_name(c.getString("route_name")); 
         busList.add(bus); 
        } 

       } catch (JSONException e) { 
        // TODO Auto-generated catch block 
        e.printStackTrace(); 
       } 
       System.out.println("====RESPONSE FOR BUSES====>" + result.toString()); 
      } else 
       result = "Did not work!"; 

     } catch (UnsupportedEncodingException e) { 
      e.printStackTrace(); 
     } catch (ClientProtocolException e) { 
      e.printStackTrace(); 
     } catch (IOException e) { 
      e.printStackTrace(); 
     } 
     // execute HTTP post request 

     return null; 
    } 

    @Override 
    protected void onPostExecute(Void result) { 
     super.onPostExecute(result); 
     pDialog.dismiss(); 
     // 
     if(busList.size()>0){ 
      adapter = new BusAdapter(BusTimingActivity.this,busList); 
      lv_bus.setAdapter(adapter); 
      adapter.notifyDataSetChanged(); 

     }else{ 
      Toast.makeText(BusTimingActivity.this,"No Routes Found",Toast.LENGTH_SHORT).show(); 
     } 

    } 

} 

Bus.java

public class Bus { 
    public String route_id; 
    public String route_name; 

    public Bus(String route_id, String route_name, String route_details, String route_from, String route_to) { 
     this.route_id = route_id; 
     this.route_name = route_name; 
     this.route_details = route_details; 
     this.route_from = route_from; 
     this.route_to = route_to; 
    } 

    public Bus() { 
    } 

    public String route_details; 

    public String getRoute_from() { 
     return route_from; 
    } 

    public void setRoute_from(String route_from) { 
     this.route_from = route_from; 
    } 

    public String getRoute_id() { 
     return route_id; 
    } 

    public void setRoute_id(String route_id) { 
     this.route_id = route_id; 
    } 

    public String getRoute_name() { 
     return route_name; 
    } 

    public void setRoute_name(String route_name) { 
     this.route_name = route_name; 
    } 

    public String getRoute_details() { 
     return route_details; 
    } 

    public void setRoute_details(String route_details) { 
     this.route_details = route_details; 
    } 

    public String getRoute_to() { 
     return route_to; 
    } 

    public void setRoute_to(String route_to) { 
     this.route_to = route_to; 
    } 

    public String route_from; 
    public String route_to; 

} 

Answer 1

それはあなたはあなたのためのフィルタリングを行いますArrayAdapter<Bus>を拡張し、その後のtoStringをオーバーライドする方が簡単かもしれ）getRoute_name（上フィルタリングしているようですので、（）バスオブジェクトがルート名を返すようにします。

私はそれがあなたのフィルタリングの問題だとは思わないが、getItem()は整数ではなくあなたの配列リストからBusオブジェクトを返すべきです。

@ダニエルウィルソンは、大文字で始まる変数のためにコードを読むのが少し難しいと指摘しています。それは静的メソッド呼び出しのように見えます。