如何增加recyclerview中每一行的edittext的值？

Question

我正在开发购物车，我想增加当用户单击recyclerview的每一行中的按钮时购买的商品的数量。

当用户单击“增加”按钮时，我试图增加编辑文本，但是它会更新recyclerview中所有编辑文本的值。

XML

            <LinearLayout
                android:layout_width="match_parent"
                android:layout_height="wrap_content"
                android:orientation="horizontal">

                <android.support.v7.widget.AppCompatButton
                    android:layout_weight="1"
                    android:id="@+id/add"
                    android:layout_width="wrap_content"
                    android:layout_height="wrap_content"
                    android:background="@color/colorPrimary"
                    android:text="Add"
                    android:textColor="#FFF" />
                <android.support.v7.widget.AppCompatButton
                    android:layout_weight="1"
                    android:id="@+id/decrease"
                    android:layout_width="wrap_content"
                    android:layout_height="wrap_content"
                    android:text="-"
                    android:textColor="#FFF" />
                <EditText
                    android:layout_weight="1"
                    android:id="@+id/numberOfItems"
                    android:layout_width="wrap_content"
                    android:layout_height="match_parent"
                    android:layout_toRightOf="@+id/add"
                    android:inputType="phone" />
                <android.support.v7.widget.AppCompatButton
                    android:layout_weight="1"
                    android:layout_marginLeft="10dp"
                    android:id="@+id/increase"
                    android:layout_width="wrap_content"
                    android:layout_height="wrap_content"
                    android:layout_toRightOf="@+id/numberOfItems"
                    android:text="+"
                    android:textColor="#FFF" />
                <android.support.v7.widget.AppCompatButton
                    android:layout_weight="1"
                    android:layout_marginLeft="10dp"
                    android:id="@+id/remove"
                    android:layout_width="wrap_content"
                    android:layout_height="wrap_content"
                    android:background="#dc3434"
                    android:text="Remove"
                    android:textColor="#FFF" />


            </LinearLayout>

适配器

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

public List<BreadModel> breads;
Context context;
private int quntity= 0;


public BreadAdapter(List<BreadModel> breads, Context context) {
    this.breads = breads;
    this.context = context;
}

@NonNull
@Override
public BreadAdapter.ViewHolder onCreateViewHolder(@NonNull ViewGroup parent, int viewType) {
    return new ViewHolder(LayoutInflater.from(parent.getContext()).inflate(R.layout.activity_bread_recyclerview, parent, false));
}

@Override
public void onBindViewHolder(@NonNull final BreadAdapter.ViewHolder holder, int position) {
    final BreadModel bread_title = breads.get(position);
    holder.tv_title.setText(bread_title.getName());
    holder.tv_price.setText(String.valueOf(bread_title.getPrice()));
    Log.i("info", bread_title.getImg());
    GlideApp.with(context)
            .load(bread_title.getImg())

    holder.increase.setOnClickListener(new View.OnClickListener() {
        @Override
        public void onClick(View view) {
            quntity= quntity+ 1;
            holder.et_numberOfItems.setText(String.valueOf(quntity));

        }
    });

}
public void update(){
    notifyDataSetChanged();
}
@Override
public int getItemCount() {
    return breads.size();
}

public class ViewHolder extends RecyclerView.ViewHolder {
    private final EditText et_numberOfItems;
    TextView tv_title;
    TextView tv_price;
    ImageView img_breads;
    CardView cv_bread;
    AppCompatButton add;
    AppCompatButton remove;
    AppCompatButton increase;
    AppCompatButton decrease;


    public ViewHolder(View itemView) {
        super(itemView);
        et_numberOfItems = (EditText) itemView.findViewById(R.id.numberOfItems);
        tv_title = (TextView) itemView.findViewById(R.id.tv_title);
        tv_price = (TextView) itemView.findViewById(R.id.tv_price);
        img_breads = (ImageView) itemView.findViewById(R.id.breadImageViews);
        cv_bread = (CardView) itemView.findViewById(R.id.breadCardView);
        add = (AppCompatButton) itemView.findViewById(R.id.add);
        remove = (AppCompatButton) itemView.findViewById(R.id.remove);
        increase = (AppCompatButton) itemView.findViewById(R.id.increase);
        decrease = (AppCompatButton) itemView.findViewById(R.id.decrease);
    }
}
}

这是我的适配器代码，请仔细阅读并帮助我。

这是屏幕截图 如果我点击加号（+）按钮，则会增加所有edittext上的项目数，而不是该特定项目