Comment résoudre les éléments de données en double dans recyclerview

Question

Je reçois des éléments de données en double dans recyclerview après que les données de localisation a été mis à jour

J'ai essayé une telle comme manière NotifyDataSetChanged() et setHasStableIds (vrai) Mais a encore pas réussi

public class FragmentPetaniTerdekat extends Fragment { 

    Context context; 
    View view; 
    Dialog dialog; 
    Session session; 
    RecyclerView recyclerView; 

    ArrayList<String> nama = new ArrayList<>(); 
    ArrayList<String> jenis = new ArrayList<>(); 
    ArrayList<String> jarak = new ArrayList<>(); 
    ArrayList<String> durasi = new ArrayList<>(); 

    String my_location; 

    public void onCreate(Bundle savedInstanceState) { 
     super.onCreate(savedInstanceState); 
     context = getContext(); 
     dialog = new Dialog(context); 
     session = new Session(context); 
    } 

    @Override 
    public View onCreateView(LayoutInflater inflater, ViewGroup container,Bundle savedInstanceState) { 
     // Inflate the layout for this fragment 
     view = inflater.inflate(R.layout.fragment_petani, container, false); 
     location(); 
     return view; 
    } 

// get adddres name current location 
    private void location() { 
     LocationListener mLocationListener = new LocationListener() { 
      @Override 
      public void onLocationChanged(Location location) { 
       // get lat and lng 
       if (location != null) { 
        double lat = location.getLatitude(); 
        double lng = location.getLongitude(); 

        my_location = String.valueOf(lat+","+lng); 
        session.setSession(my_location); 
        getApi(session.getSesssion()); 
       }else{ 
        getApi(session.getSesssion()); 
       } 
      } 

      @Override 
      public void onStatusChanged(String provider, int status, Bundle extras) { 
      } 

      @Override 
      public void onProviderEnabled(String provider) { 
      } 

      @Override 
      public void onProviderDisabled(String provider) { 
      } 
     }; 

     LocationManager mLocationManager = (LocationManager) getActivity().getSystemService(LOCATION_SERVICE); 

     if (ActivityCompat.checkSelfPermission(getActivity(), Manifest.permission.ACCESS_FINE_LOCATION) != PackageManager.PERMISSION_GRANTED && ActivityCompat.checkSelfPermission(getActivity(), Manifest.permission.ACCESS_COARSE_LOCATION) != PackageManager.PERMISSION_GRANTED) { 
      // TODO: Consider calling 
      // ActivityCompat#requestPermissions 
      // here to request the missing permissions, and then overriding 
      // public void onRequestPermissionsResult(int requestCode, String[] permissions, 
      //           int[] grantResults) 
      // to handle the case where the user grants the permission. See the documentation 
      // for ActivityCompat#requestPermissions for more details. 
      return ; 
     } 

     // check alternative get location 
     boolean GPS_ENABLE, NETWORK_ENABLE; 
     GPS_ENABLE = mLocationManager.isProviderEnabled(LocationManager.GPS_PROVIDER); 
     NETWORK_ENABLE = mLocationManager.isProviderEnabled(LocationManager.NETWORK_PROVIDER); 

     if (GPS_ENABLE){ 
      dialog.showDialog("Pesan","memuat data...",true); 
      Toast.makeText(getActivity(),"GPS state",Toast.LENGTH_LONG).show(); 
      mLocationManager.requestLocationUpdates(LocationManager.GPS_PROVIDER, 1000 * 5 * 1 , 1, mLocationListener); 
     }else if(NETWORK_ENABLE){ 
      Toast.makeText(getActivity(),"network state",Toast.LENGTH_LONG).show(); 
      mLocationManager.requestLocationUpdates(LocationManager.NETWORK_PROVIDER, 1, 1,mLocationListener); 
     }else{ 
      Toast.makeText(getActivity(),"ganok seng kepilih cak",Toast.LENGTH_LONG).show(); 
      showSettingsAlert(); 
     } 

    } 

// show alert setting if gps non aktif 
    public void showSettingsAlert(){ 
     AlertDialog.Builder alertDialog = new AlertDialog.Builder(getActivity()); 

     // Setting Dialog Title 
     alertDialog.setTitle("GPS is settings"); 

     // Setting Dialog Message 
     alertDialog.setMessage("GPS is not enabled. Do you want to go to settings menu?"); 

     // On pressing Settings button 
     alertDialog.setPositiveButton("Settings", new DialogInterface.OnClickListener() { 
      public void onClick(DialogInterface dialog,int which) { 
       Intent intent = new Intent(Settings.ACTION_LOCATION_SOURCE_SETTINGS); 
       getActivity().startActivity(intent); 
      } 
     }); 

     // Showing Alert Message 
     alertDialog.show(); 
    } 

    public void initRecylerView(View v){ 
     recyclerView = (RecyclerView)v.findViewById(R.id.recylerview_petani_terdekat); 

     RecyclerView.LayoutManager layoutManager = new LinearLayoutManager(context); 
     recyclerView.setLayoutManager(layoutManager); 

     RecyclerView.Adapter adapter = new AdapterPetaniTerdekat(context,nama,jarak,durasi); 
//  adapter.notifyDataSetChanged(); 
//  adapter.setHasStableIds(true); 
     recyclerView.setAdapter(adapter); 

    } 

    public void getApi(final String my_location){ 
     dialog.message("lokasi : "+my_location); 
     StringRequest request = new StringRequest(Request.Method.POST, URL_PETANI_TERDEKAT, new Response.Listener<String>() { 
      @Override 
      public void onResponse(String response) { 
       if (response != null) { 
        try { 

         JSONObject get_respone = new JSONObject(response); 
         JSONArray get_result = get_respone.getJSONArray("result_petani_terdekat"); 

         for (int i=0; i<get_result.length(); i++){ 

          JSONObject result = get_result.getJSONObject(i); 

          ModelPetaniTerdekat petaniTerdekat = new ModelPetaniTerdekat(); 
          petaniTerdekat.setNama(result.getString("nama")); 

          JSONObject kriteria = result.getJSONObject("jarak"); 
          for (int z=0; z<kriteria.length(); z++){ 
           petaniTerdekat.setJarak(kriteria.getString("distance")); 
           petaniTerdekat.setDurasi(kriteria.getString("duration")); 
          } 

          nama.add(petaniTerdekat.getNama()); 
          jarak.add(petaniTerdekat.getJarak()); 
          durasi.add(petaniTerdekat.getDurasi()); 

          dialog.closeDialog(); 
         } 

         initRecylerView(view); 

        } catch (JSONException e) { 
         dialog.message("Error : "+e.toString()); 
         e.printStackTrace(); 
        } 
       }else{ 
        dialog.message("Error : Tidak ada data !"); 
       } 
      } 
     }, new Response.ErrorListener() { 
      @Override 
      public void onErrorResponse(VolleyError error) { 
       if (error instanceof TimeoutError || error instanceof NoConnectionError) { 
        dialog.message("Error : TimeoutError"); 
       } else if (error instanceof AuthFailureError) { 
        dialog.message("Error : AuthFailureError"); 
       } else if (error instanceof ServerError) { 
        dialog.message("Error : ServerError"); 
       } else if (error instanceof NetworkError) { 
        dialog.message("Error : NetworkError"); 
       } else if (error instanceof ParseError) { 
        error.printStackTrace(); 
        dialog.message("Error : ParseError"); 
       } 
       dialog.closeDialog(); 
      } 
     }){ 
      @Override 
      protected Map<String, String> getParams() throws AuthFailureError { 
       HashMap<String,String> map = new HashMap<>(); 
       map.put("lokasi_saya",my_location); 
       return map; 
      } 
     }; 

     AppSingleton.getInstance(context).addToRequestQueue(request); 
     request.setRetryPolicy(new DefaultRetryPolicy(
       60000, 
       DefaultRetryPolicy.DEFAULT_MAX_RETRIES, 
       DefaultRetryPolicy.DEFAULT_BACKOFF_MULT)); 
    } 


} 

et que mon adaptateur

public class AdapterPetaniTerdekat extends RecyclerView.Adapter<AdapterPetaniTerdekat.ViewHolderCabe> { 

    Context context; 
    ArrayList<String> nama = new ArrayList<>(); 
    ArrayList<String> jarak = new ArrayList<>(); 
    ArrayList<String> durasi = new ArrayList<>(); 

    public AdapterPetaniTerdekat(Context context, ArrayList<String> nama, ArrayList<String> jarak, ArrayList<String> durasi) { 
     this.context = context; 
     this.nama = nama; 
     this.jarak = jarak; 
     this.durasi = durasi; 
    } 

    @Override 
    public ViewHolderCabe onCreateViewHolder(ViewGroup parent, int viewType) { 
     View view = LayoutInflater.from(parent.getContext()).inflate(R.layout.rows_petani_terdekat,parent,false); 
     return new ViewHolderCabe(view); 
    } 

    @Override 
    public void onBindViewHolder(ViewHolderCabe holder, int position) { 
     holder.tv_nama.setText(nama.get(position)); 
     holder.tv_jarak.setText(jarak.get(position)); 
     holder.tv_durasi.setText(durasi.get(position)); 
    } 

    @Override 
    public long getItemId(int position) { 
     return position; 
    } 

    @Override 
    public int getItemCount() { 
     return nama.size(); 
    } 

    public class ViewHolderCabe extends RecyclerView.ViewHolder{ 

     TextView tv_nama, tv_jarak, tv_durasi; 

     public ViewHolderCabe(View itemView) { 
      super(itemView); 

      tv_nama = (TextView)itemView.findViewById(R.id.tv_nama_petani); 
      tv_jarak = (TextView)itemView.findViewById(R.id.tv_jarak); 
      tv_durasi = (TextView)itemView.findViewById(R.id.tv_durasi); 

     } 

    } 
} 

Answer 1

AJOUTZ méthode dans votre FragmentPetaniTerdekat pour vérifier l'entrée duplicate:

public boolean isExist(String strNama) { 

    for (int i = 0; i < nama.size(); i++) { 
     if (nama.get(i).equals(strNama)) { 
      return true; 
     } 
    } 

    return false; 
} 

Utilisez cette méthode à l'intérieur onResponse(), avant d'ajouter la chaîne dans des listes (nama, jarak, durasi):

 @Override 
     public void onResponse(String response) { 
      if (response != null) { 
       try { 

        .............. 
        .................. 

        for (int i = 0; i < get_result.length(); i++){ 

         JSONObject result = get_result.getJSONObject(i); 

         ModelPetaniTerdekat petaniTerdekat = new ModelPetaniTerdekat(); 
         petaniTerdekat.setNama(result.getString("nama")); 

         JSONObject kriteria = result.getJSONObject("jarak"); 
         for (int z=0; z<kriteria.length(); z++){ 
          petaniTerdekat.setJarak(kriteria.getString("distance")); 
          petaniTerdekat.setDurasi(kriteria.getString("duration")); 
         } 

         boolean isExist = isExist(petaniTerdekat.getNama()); 

         if (!isExist) { // Not exist, Add now 
          nama.add(petaniTerdekat.getNama()); 
          jarak.add(petaniTerdekat.getJarak()); 
          durasi.add(petaniTerdekat.getDurasi()); 
         } 

         dialog.closeDialog(); 
        } 

        initRecylerView(view); 

       } catch (JSONException e) { 
        dialog.message("Error : "+e.toString()); 
        e.printStackTrace(); 
       } 
      }else{ 
       dialog.message("Error : Tidak ada data !"); 
      } 
     } 

Espérons que cela aidera ~