我使用RecyclerView通过GridLayoutManager创建了一个巴士座位布局。 当视图第一次膨胀时，seat arrangement view， 仅显示可见的适配器位置，但是当视图在同一会话{@ 3}}中下次膨胀时，所有适配器位置都可见。 应该怎么做才能消除这个错误？
答案 0 :(得分：0)
//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);
}
}
}