2回目の訪問時にrecyclerviewの隠し位置が表示される

Question

GridLayoutManagerを使用してRecyclerViewを使用してバスシートレイアウトを作成しました。 最初にビューを拡張したときには、seat arrangement view, しか表示されませんが、同じセッションで次回にビューを拡張すると、すべてのアダプターの位置が表示されます。false seat layout view このエラーを根絶するにはどうすればよいですか？

Answer 1

//This is the seat selection activity 

package com.anbocas.fleet; 

import android.content.Intent; 
import android.graphics.Bitmap; 
import android.graphics.BitmapFactory; 
import android.os.Bundle; 
import android.support.v7.app.AppCompatActivity; 
import android.support.v7.widget.GridLayoutManager; 
import android.support.v7.widget.RecyclerView; 
import android.util.Log; 
import android.view.View; 
import android.widget.Button; 
import android.widget.TextView; 
import android.widget.Toast; 

import org.json.JSONArray; 
import org.json.JSONException; 
import org.json.JSONObject; 

import java.util.ArrayList; 
import java.util.StringTokenizer; 

import static com.anbocas.fleet.SeatAdapter.*; 

public class SeatSelectionActivity extends AppCompatActivity { 

    ArrayList<Integer> items = new ArrayList<>(); // contains values 0 for hidden seat and 1 for visible seats 
    ArrayList<BusSeatDataProvider> dataProvider = new ArrayList<>(); 
    ArrayList<Integer> seatNos = new ArrayList<>(); // this is not used 
    static int hidePos = 3; 
    int item = 1; 
    final int TOTAL_SEATS = 50; 
    RecyclerView recyclerView; 
    RecyclerView.Adapter adapter; 
    GridLayoutManager gridLayoutManager; 
    Bitmap seatIcon; 
    ArrayList<Integer> seatsJSONed = new ArrayList<>(); // contain booked seats available in database 
    ArrayList<Integer> seatsPosJSONed = new ArrayList<>(); // contains the adapter position of the booked seats 
    private TextView seatSelected; 
    private TextView Totalfare; 
    SeatAdapter seat; 
    Button MakePayment; 
    // ArrayList<String> seat_select = new ArrayList<>(); 
    String seatsFetched = ""; 
    static String seats = ""; 
    static String seatsPos=""; 


    @Override 
    protected void onCreate(Bundle savedInstanceState) { 
     super.onCreate(savedInstanceState); 
     setContentView(R.layout.activity_seat_selection); 
     seatsFetched = getIntent().getStringExtra("seatsFetchedJSON");// JSON of seats and adapter position 
     seatIcon = BitmapFactory.decodeResource(this.getResources(), R.drawable.seat_available_24dp); 

     seatSelected = (TextView) findViewById(R.id.tv_seatSelected); 
     Totalfare = (TextView) findViewById(R.id.tv_totalFare); 
     MakePayment = (Button) findViewById(R.id.btn_makePayment); 
     recyclerView = (RecyclerView) findViewById(R.id.seatRecycler); 
     recyclerView.setHasFixedSize(true); 
     gridLayoutManager = new GridLayoutManager(this, 5); 
     recyclerView.setLayoutManager(gridLayoutManager); 

     //--------------------------------------------------------------- 
     JSONObject jsonObject; 
     //Log.e("seatsFetched",seatsFetched); 
     Toast.makeText(this, seatsFetched, Toast.LENGTH_LONG).show(); 
     try { 

      jsonObject = new JSONObject(seatsFetched); 

      JSONArray jsonArray = jsonObject.getJSONArray("seatsFetched"); 

      JSONObject final_object; 
      for (int i = 0; i < jsonArray.length(); i++) { 
       final_object = jsonArray.getJSONObject(i); 
       seats = final_object.getString("seats"); //booked seats extracted from json 
       seatsPos=final_object.getString("seatPos");// adapter position extracted from json 
      } 

     } catch (JSONException e) { 
      e.printStackTrace(); 
     } 

     StringTokenizer st = new StringTokenizer(seats,","); 
     StringTokenizer st1=new StringTokenizer(seatsPos,","); 
     int i; 
     while (st.hasMoreTokens()) { 
      String seat=st.nextToken(); 
      seatsJSONed.add(Integer.parseInt(seat));// extracting & adding individual seats to integer arraylist 
     } 
     while (st1.hasMoreTokens()) { 
      String seatP=st1.nextToken(); 
      seatsPosJSONed.add(Integer.parseInt(seatP));// extracting and adding individual adapter position to integer arraylist 
     } 

     //----------------------------------------------------------- 


     for (i = 1; i <=TOTAL_SEATS; i++) { 
      if (i == hidePos && hidePos <= 43) { 

       items.add(0); 
       //item--; 
       hidePos = hidePos + 5; 
       seatNos.add(null); 
       Log.e("itemValueWhereHide", item + "-" + i); 
       dataProvider.add(new BusSeatDataProvider(null, null, false)); 
       adapter.notifyDataSetChanged(); 
      } else if (i == 48) { 
       items.add(1); 
       seatNos.add(item); 
       Log.e("itemValue", (item) + "-" + i); 
       dataProvider.add(new BusSeatDataProvider(seatIcon, item + "", false)); 
       adapter.notifyDataSetChanged(); 

      } else if (i == 49) { 
       items.add(1); 
       item = item + 1; 
       seatNos.add(item); 
       Log.e("itemValue", (item) + "-" + i); 
       dataProvider.add(new BusSeatDataProvider(seatIcon, item + "", false)); 
       adapter.notifyDataSetChanged(); 
      } else if (i == 50) { 
       items.add(1); 
       item = item + 1; 
       seatNos.add(item); 
       Log.e("itemValue", (item) + "-" + i); 
       dataProvider.add(new BusSeatDataProvider(seatIcon, item + "", false)); 
       adapter.notifyDataSetChanged(); 
      } else { 
       items.add(1); 
       seatNos.add(item); 
       Log.e("itemValue", item + "-" + i); 
       dataProvider.add(new BusSeatDataProvider(seatIcon, item + "", false)); 
       adapter.notifyDataSetChanged(); 
       item++; 

      } 
     } 
     adapter = new SeatAdapter(dataProvider, items, seatNos, this, seatSelected, Totalfare,seatsJSONed,seatsPosJSONed); 
     recyclerView.setAdapter(adapter); 


    } 

    public void onProceedClick(View view) { 
     seat = new SeatAdapter(); 
     Intent intent = new Intent(this, PassengerDetailsActivity.class); 
     Log.e("NumOfSeatsBooked", seat.seatCounter + ""); 
     intent.putExtra("NumOfSeatsBooked", seat.seatCounter); 
     Log.e("seats", seatSelected.getText().toString()); 
     intent.putExtra("seatsSelected", seatSelected.getText().toString()); 
     Toast.makeText(this,seat.seat_position,Toast.LENGTH_SHORT).show(); 
     intent.putExtra("seatsSelectedPosition", seat.seat_position); 
     // tokenize this seats string and send to passengerdetails activity to link each seat with the passenger 
     startActivity(intent); 
    } 

    @Override 
    public void onBackPressed() { 
     super.onBackPressed(); 
     adapter.notifyDataSetChanged(); 
    } 
} 


// This is Seat Adapter 
package com.anbocas.fleet; 

import android.content.Context; 
import android.graphics.Bitmap; 
import android.graphics.BitmapFactory; 
import android.support.v7.widget.RecyclerView; 
import android.text.TextUtils; 
import android.util.Log; 
import android.view.LayoutInflater; 
import android.view.View; 
import android.view.ViewGroup; 
import android.widget.ImageView; 
import android.widget.LinearLayout; 
import android.widget.TextView; 
import android.widget.Toast; 

import java.lang.reflect.Array; 
import java.util.ArrayList; 
import java.util.List; 

/** 
* Created by Rahul Gupta on 06/09/2016. 
*/ 
public class SeatAdapter extends RecyclerView.Adapter<SeatAdapter.ViewHolder> { 

    ArrayList<BusSeatDataProvider> arrayList = new ArrayList<BusSeatDataProvider>(); 
    ArrayList<Integer> seatNos = new ArrayList<Integer>(); 
    ArrayList<Integer> items = new ArrayList<>(); 
    ArrayList<String> seat_select = new ArrayList<>(); 
    static ArrayList<String> seat_pos = new ArrayList<>(); 
    static String seat_position; 
    BusSeatDataProvider dataProvider; 
    BusSeatDataProvider dataProvider1; 
    BusSeatDataProvider item; 
    Context context; 
    LinearLayout singleSeat; 
    Bitmap seatIcon; 
    Bitmap seatSelect, seatUnav; 
    int fare = 0; 
    static int count=0; 
    static int seatCounter = 0; 
    SeatSelectionActivity ob; 
    String seats = ""; 
    TextView seatSelected, Totalfare; 
    ArrayList<Integer> seatsJSONed= new ArrayList<>(); 
    ArrayList<Integer> seatsPosJSONed= new ArrayList<>(); 

    public SeatAdapter(ArrayList<BusSeatDataProvider> arrayList, ArrayList<Integer> items, ArrayList<Integer> seatNos, Context context, 
         TextView seatSelected, TextView Totalfare, ArrayList<Integer> seatsJSONed, ArrayList<Integer> seatsPosJSONed) { 
     this.arrayList = arrayList; 
     this.context = context; 
     this.items = items; 
     this.seatNos = seatNos; 
     this.seatSelected = seatSelected; 
     this.Totalfare = Totalfare; 
     seatUnav = BitmapFactory.decodeResource(context.getResources(), R.drawable.seat_unavailable_24dp); 
     seatIcon = BitmapFactory.decodeResource(context.getResources(), R.drawable.seat_available_24dp); 
     seatSelect = BitmapFactory.decodeResource(context.getResources(), R.drawable.seat_selected_24dp); 
     //ob=new SeatSelectionActivity(); 
     this.seatsJSONed = seatsJSONed; 
     this.seatsPosJSONed = seatsPosJSONed; 
    } 

    public SeatAdapter() { 
// 
    } 

    @Override 
    public SeatAdapter.ViewHolder onCreateViewHolder(ViewGroup parent, int viewType) { 
     View v = LayoutInflater.from(parent.getContext()).inflate(R.layout.grid_view_single, parent, false); 
     final ViewHolder viewHolder = new ViewHolder(v); 
     singleSeat=(LinearLayout)v.findViewById(R.id.single_seat_layout); 
     return viewHolder; 
    } 

    @Override 
    public void onBindViewHolder(final SeatAdapter.ViewHolder holder, final int position) { 
     holder.setIsRecyclable(false); 
     //----------------------------------------------------------- 
     if (items.get(position) == 0) { 
      dataProvider = arrayList.get(position); 
      //holder.seatIcon.setImageBitmap(dataProvider.getSeatIcon()); 
      //holder.seatNo.setText(dataProvider.getSeatNo()); 
      holder.seatIconn.setVisibility(View.INVISIBLE); 
      holder.seatNo.setVisibility(View.INVISIBLE); 
      holder.seatIconn.setClickable(false); 
      holder.seatNo.setClickable(false); 
     } else { 
      dataProvider = arrayList.get(position); 
      holder.seatIconn.setImageBitmap(dataProvider.getSeatIcon()); 
      holder.seatNo.setText(dataProvider.getSeatNo()); 
      if(count<seatsJSONed.size()) 

      { 
       for (int i = 0; i < seatsJSONed.size(); i++) { 

        count++; 
        int p = seatsPosJSONed.get(i); 
        System.out.println(seatsJSONed.get(i)); 
        System.out.println(seatsPosJSONed.get(i)); 
        arrayList.set(p, new BusSeatDataProvider(seatUnav,seatsJSONed.get(i)+"", true)); 
        holder.seatIconn.setClickable(false); 
        holder.seatNo.setClickable(false); 
        holder.seatIconn.setEnabled(false); 
        holder.seatIconn.setFocusable(false); 
        singleSeat.setClickable(false); 
       } 
      } 


      holder.itemView.setOnClickListener(new View.OnClickListener() { 
       @Override 
       public void onClick(View view) { 

        if (items.get(position) == 1) { 
         item = arrayList.get(position); 
        } 

        Bitmap seatcompare = item.getSeatIcon(); 
        boolean seatCompareResult;//=seatCompareResult(seatcompare,seatIcon); 
        seatCompareResult = seatcompare.sameAs(seatIcon); 
        if (seatCompareResult == true) { 
//      Log.e("beforeMethod", "true"); 
         seatSelected(position); 
//      Log.e("AfterMethod", "true"); 
        } else { 
//      Log.e("beforeMethod", "true"); 
         seatDeselected(position); 
//      Log.e("AfterMethod", "true"); 

        } 
       } 


       public void seatSelected(int pos) { 
        if (items.get(pos) == 1) { 
         dataProvider1 = arrayList.get(pos); 
        } 
        if (seatCounter < 6) { 
         arrayList.remove(pos); 
         int i = pos; 
         seatCounter++; 
//      Log.e("SeatSelect", "true"); 
//     Log.e("BeforeNotify", "true"); 
//      Log.e("seatCounter", seatCounter + ""); 
         arrayList.add(i, new BusSeatDataProvider(seatSelect, dataProvider1.getSeatNo(), true)); 
         notifyDataSetChanged(); 
//      Log.e("AfterNotify", "true"); 
         //seats = seats + "" + (i) + ","; 
         seat_select.add(dataProvider1.getSeatNo()); 
         //add positions to arraylist for the seat selected 
         seat_pos.add(pos + ""); 
         seats = TextUtils.join(",", seat_select).toString(); 
         //concatenate the selected seat position to form a string 
         seat_position = TextUtils.join(",", seat_pos).toString(); 
         Toast.makeText(context, seat_position, Toast.LENGTH_SHORT).show(); 
         seatSelected.setText(seats); 
         fare = fare + 330; 
         Totalfare.setText(String.valueOf(fare)); 
        } else { 
         Toast.makeText(context, "Can't book more than 6 seats at a time!", Toast.LENGTH_SHORT).show(); 
        } 
       } 

       public void seatDeselected(int pos) { 
        if (items.get(pos) == 1) { 
         dataProvider1 = arrayList.get(pos); 
        } 
        arrayList.remove(pos); 
        seat_select.remove(dataProvider1.getSeatNo()); 
        seat_pos.remove(pos + ""); 
        int i = pos; 
        seatCounter--; 
//     Log.e("SeatDeSelect", "true"); 
//     Log.e("BeforeNotify", "true"); 
//     Log.e("seatCounter", seatCounter + ""); 
        arrayList.add(i, new BusSeatDataProvider(seatIcon, dataProvider1.getSeatNo(), false)); 
        notifyDataSetChanged(); 
//     Log.e("AfterNotify", "true"); 
        seats = TextUtils.join(",", seat_select).toString(); 
        seat_position = TextUtils.join(",", seat_pos).toString(); 
        Toast.makeText(context, seat_position, Toast.LENGTH_SHORT).show(); 
//     seats = seats.replace("" + dataProvider1.getSeatNo() + ",", ""); 
        fare = fare - 330; 
        Totalfare.setText(fare + ""); 
        seatSelected.setText(seats); 

       } 
      }); 
     } 
    } 

//  boolean seatCompareResult(Bitmap seatcompare, Bitmap seatIcon) { 
// 
//  { 
//   if (seatcompare.getHeight() != seatIcon.getHeight()) 
//    return false; 
//   if (seatcompare.getWidth() != seatIcon.getWidth()) return false; 
// 
//   for (int y = 0; y < seatcompare.getHeight(); ++y) 
//    for (int x = 0; x < seatcompare.getWidth(); ++x) 
//     if (seatcompare.getPixel(x, y) != seatIcon.getPixel(x, y)) return false; 
// 
//   return true; 
//  } 
// } 

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


    public class ViewHolder extends RecyclerView.ViewHolder { 

     ImageView seatIconn; 
     TextView seatNo; 

     public ViewHolder() { 
      super(null); 

     } 

     public ViewHolder(final View itemView) { 
      super(itemView); 
      seatIconn = (ImageView) itemView.findViewById(R.id.seatIcon); 
      seatNo = (TextView) itemView.findViewById(R.id.seatNo); 

     } 


    } 


}