java - 选择和取消选择 recyclerview 项目未正确更改图像

Question

我正在开发一个巴士预订应用程序。我希望当我选择座位时它会改变座位图像。取消选择它应该更改为最后一张图像。我的其他功能运行良好，包括选择座位和显示座位号。在 TextView 中并取消选择也工作正常。但它只是不改变座位形象就是问题所在。如果我点击座位号。 18，即实际上 20 日，它会更改第一个座位的图像，即座位号 A。如果座位 19，则座位号为 B；如果座位为 20，则座位号。 1 等等。

public class SeatSelection extends AppCompatActivity implements AdapterView.OnItemClickListener{

RecyclerView recyclerView;
SeatAdapter seatAdapter;
List<SeatDetails> seatDetailsList;
List seatNo;
TextView txtSeatNo;
TextView fare;
public Bitmap seatIcon;
public Bitmap seatSelect;
String cost;
int amt;
int charge;

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_seat_selection);

    seatIcon = BitmapFactory.decodeResource(this.getResources(), R.drawable.seat_layout_screen_nor_avl);
    seatSelect = BitmapFactory.decodeResource(this.getResources(), R.drawable.seat_layout_screen_nor_std);

    recyclerView = (RecyclerView) findViewById(R.id.recycler);
    RecyclerView.LayoutManager layoutManager = new GridLayoutManager(this, 5);
    recyclerView.setLayoutManager(layoutManager);
    seatAdapter = new SeatAdapter(this, loadBustListSeats());
    recyclerView.setAdapter(seatAdapter);


}

public class SeatDetails {
    String name;
    boolean isBlank;
    boolean isSelected;

    public SeatDetails(String name, boolean isBlank, boolean isSelected) {
        this.name = name;
        this.isBlank = isBlank;
        this.isSelected = isSelected;
    }

    public String getName() {
        return name;
    }

    public void setSelected(boolean selected) {
        isSelected = selected;
    }
}

public List<SeatDetails> loadBustListSeats() {
    seatDetailsList = new ArrayList<SeatDetails>();
    int seatSerialNumber = 1;
    for (int i = 0; i < 60; i++) {
        if (isBlankSeat(i)) {
            seatDetailsList.add(new SeatDetails("", true, false));
        } else {
            if (i == 0) {
                seatDetailsList.add(new SeatDetails("A", true, false));
            } else if (i == 1) {
                seatDetailsList.add(new SeatDetails("B", true, false));
            } else {
                seatDetailsList.add(new SeatDetails(String.valueOf(seatSerialNumber), true, false));
                seatSerialNumber = seatSerialNumber + 1;
            }
        }
    }
    return seatDetailsList;
}


public boolean isBlankSeat(int i) {
    if ((60 - (i - 1)) < 5)
        return false;
    else
        return i % 5 == 2 ;
}
@Override
public void onItemClick(AdapterView<?> parent, View view, int position, long id) {


}

public void seatSelected(int pos)
{
    charge = charge + amt;
    seatNo.add(seatDetailsList.get(pos).getName());
    txtSeatNo.setText(seatNo.toString());
    fare.setText(String.valueOf(charge));

    seatDetailsList.get(pos).setSelected(true);
    seatAdapter.notifyDataSetChanged();

}

public void seatDeselected(int pos)
{
    charge = charge - amt;
    fare.setText(String.valueOf(charge));
    seatNo.remove(seatDetailsList.get(pos).getName());
    txtSeatNo.setText(seatNo.toString());
    seatDetailsList.get(pos).setSelected(false);
    seatAdapter.notifyDataSetChanged();
}


public class SeatAdapter extends RecyclerView.Adapter<RecyclerView.ViewHolder>{


    class ViewHolderOriginal extends RecyclerView.ViewHolder{

        ImageView imageView;
        TextView textView;
        ViewHolderOriginal(View itemView) {
            super(itemView);
            imageView= (ImageView) itemView.findViewById(R.id.item_image);
            textView = (TextView) itemView.findViewById(R.id.item_text);

        }
    }

    class ViewHolderBlank extends RecyclerView.ViewHolder{
        ViewHolderBlank(View itemView) {
            super(itemView);

        }

    }


    public   Context cntx;
    public SeatAdapter(Context context, List<SeatDetails> list){
        cntx = context;
        seatDetailsList = list;
    }

    // 0= Original view 1= Blank View
    @Override
    public int getItemViewType(int position) {
        if((getItemCount()-(position-1))<5)
            return 0;
        else
            return position % 5 == 2 ? 1 : 0;
    }

    @Override
    public int getItemCount() {
        return 60;
    }

    @Override
    public RecyclerView.ViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {


        LayoutInflater inflater = (LayoutInflater) parent.getContext().getSystemService(Context.LAYOUT_INFLATER_SERVICE);
        if (viewType == 1)
            return new ViewHolderBlank(inflater.inflate(R.layout.item_blank, parent, false));
        else
            return new ViewHolderOriginal(inflater.inflate(R.layout.seatrow_grid, parent, false));
    }

    @Override
    public void onBindViewHolder(final RecyclerView.ViewHolder holder, final int position) {
        if (holder instanceof ViewHolderBlank) {

        } else if (holder instanceof ViewHolderOriginal) {
            holder.itemView.setOnClickListener(new View.OnClickListener() {
                @Override
                public void onClick(View v) {
                    SeatDetails seatDetails = seatDetailsList.get(position);

                    if (seatDetails.isSelected){
                        seatDeselected(position);
                        ((ViewHolderOriginal) holder).imageView.setImageBitmap(seatIcon);
                    }
                    else
                    {
                        seatSelected(position);
                        ((ViewHolderOriginal) holder).imageView.setImageBitmap(seatSelect);
                    }
                }
            });
        }
    }

}
}

Answer 1

试试这个:

@Override
public void onBindViewHolder(final RecyclerView.ViewHolder holder, final int position) {
    if (holder instanceof ViewHolderBlank) {

    } else if (holder instanceof ViewHolderOriginal) {
        SeatDetails seatDetails = seatDetailsList.get(position);
        if (seatDetails.isSelected){
            ((ViewHolderOriginal) holder).imageView.setImageBitmap(seatSelect);
        }else{
            ((ViewHolderOriginal) holder).imageView.setImageBitmap(seatIcon);
        }

        holder.itemView.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                SeatDetails seatDetails = seatDetailsList.get(position);

                if (seatDetails.isSelected){
                    seatDeselected(position);
                }else{
                    seatSelected(position);
                }
            }
        });
    }
}

您忘记根据数据设置 View 。由于您的函数中有notifyDataSetChanged()，因此无需在onClcik() 中更改图像。希望有帮助!