在滚动RecyclerView时，自定义视图值不断变化

时间：2016-10-28 12:35:35

标签： android android-studio android-fragments android-recyclerview recycler-adapter

我有问题，当我点击增加位置第一项的数量时，当我向下和向下骂时，该项目的位置闪烁......

请提前帮助我们帮助

这是我的适配器类。

package growcia.malacus.com.growcia.adapter;

import android.content.Context;
import android.content.DialogInterface;
import android.graphics.Typeface;
import android.support.v7.widget.RecyclerView;
import android.util.Log;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.Button;
import android.widget.ImageView;
import android.widget.TextView;
import android.widget.Toast;

import com.squareup.picasso.Picasso;

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

 import java.util.List;

 import growcia.malacus.com.growcia.R;
 import growcia.malacus.com.growcia.activity.ProductListActivity;
 import growcia.malacus.com.growcia.database.SqliteDatabaseClass;
 import growcia.malacus.com.growcia.model.SellerProductPOJO;



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

public Context context;
SqliteDatabaseClass DB;
String productCode;
boolean isPressed = false;
int count = 0;
int qty;


public String pname, price, img_path;
static int productItem = 0;
int totPrice;

ProductListActivity objProductList;
List<SellerProductPOJO> productListDetails;


public ProductListAdapter(List<SellerProductPOJO> productDetails, Context context) {
    super();

    DB = new SqliteDatabaseClass(context);
    objProductList = new ProductListActivity();
    this.productListDetails = productDetails;
    this.context = context;
}


@Override
public ViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {
    View v = LayoutInflater.from(parent.getContext())
            .inflate(R.layout.item_product, parent, false);
    ViewHolder viewHolder = new ViewHolder(v);
    return viewHolder;
}

@Override
public void onBindViewHolder(final ViewHolder holder, final int position) {

    final SellerProductPOJO objSellerProductPOJO = productListDetails.get(position);

    try {
        JSONArray jar = DB.getAllProductCodeAndQtyProductList();
        Log.e("total pid and qty ad : ", "" + jar.toString());

        for (int i = 0; i < jar.length(); i++) {
            JSONObject job = jar.getJSONObject(i);

            String cart_productId = job.getString("ProductCode");
            String productQty = job.getString("QuantityOrdered");

            Log.e("id and qty: ", cart_productId + " qty: " + productQty);

            String plist_prod_id = productListDetails.get(position).getProductCode();

            Log.e("product id in cart : ", "" + cart_productId.toString());
            Log.e("product id service : ", "" + plist_prod_id.toString());

        }

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


    String url = objSellerProductPOJO.getImagePath();
    Picasso.with(context)
            .load(url)
            .placeholder(R.drawable.placeholder)   // optional
            .error(R.drawable.error)   // optional
            .resize(100, 100)                        // optional
            .into(holder.ivProduct);
    holder.tvProductName.setText(objSellerProductPOJO.getProductName());
    holder.tvUnit.setText(objSellerProductPOJO.getAvailableQuantity());
    holder.tvPrice.setText(objSellerProductPOJO.getPrice());

    Typeface font = Typeface.createFromAsset(context.getAssets(), "fonts/abc.ttf");
    holder.tvProductName.setTypeface(font);
    holder.tvUnit.setTypeface(font);
    holder.tvPrice.setTypeface(font);


    if (context instanceof ProductListActivity)
        totPrice = DB.getSumPrice();
    Log.e("all price insert : ", "" + totPrice);
    count = DB.getProfilesCount();
    Log.e("count from db", "" + count);
    ((ProductListActivity) context).showCartItem(count, totPrice);



    holder.btnPlus.setOnClickListener(new View.OnClickListener() {

        @Override
        public void onClick(View v) {
            SellerProductPOJO objSellerProduct = productListDetails.get(position);


            String stock = holder.tvUnit.getText().toString();
            int qtyMiddle = Integer.parseInt(holder.tvQty.getText().toString());
            int qtyStock = Integer.parseInt(objSellerProduct.getAvailableQuantity().toString());


            if (!stock.equalsIgnoreCase("0")) {

                if (qtyMiddle < qtyStock) {


                    pname = objSellerProduct.getProductName();
                    img_path = objSellerProduct.getImagePath();
                    price = objSellerProduct.getPrice();
                    productCode = objSellerProduct.getProductCode();


                    String str_qty = holder.tvQty.getText().toString();
                    int qty = Integer.parseInt(str_qty);

                    qty = qty + 1;
                    String final_str_qty = "" + qty;


                    objSellerProductPOJO.setQty(final_str_qty);
                    holder.tvQty.setText(objSellerProductPOJO.getQty() + "");

                    int reduceable_stock = qtyStock - qty;

                    holder.tvUnit.setText(reduceable_stock + "");

                    if (qty > 0) {
                        boolean entryStatus = DB.Exists(productCode);
                        if (entryStatus) {

                            productItem = productItem + 1;
                            String str_newQty = holder.tvQty.getText().toString();
                            int newqty = Integer.parseInt(str_newQty);
                            double intPrice = Double.parseDouble(price);
                            double totPrice = qty * intPrice;
                            DB.updateProductQty(productCode, newqty, totPrice);
                            totPrice = DB.getSumPrice();
                            Log.e("all price update: ", "" + totPrice);

                        } else {
                            productItem = 1;
                            DB.addProductItem(productCode, pname, img_path, productItem, price, price);

                        }
                        if (context instanceof ProductListActivity)
                            totPrice = DB.getSumPrice();
                        Log.e("all price insert : ", "" + totPrice);
                        count = DB.getProfilesCount();
                        Log.e("count from db", "" + count);
                        ((ProductListActivity) context).showCartItem(count, totPrice);
                    }


                } else {
                    Toast.makeText(context, "Product out of stock!!", Toast.LENGTH_SHORT).show();
                }

            }

        }
    });

    holder.btnMinus.setOnClickListener(new View.OnClickListener() {

        @Override
        public void onClick(View v) {

            String stock = holder.tvUnit.getText().toString();
            if (!stock.equalsIgnoreCase("0")) {

                SellerProductPOJO objSellerProductDeduct = productListDetails.get(position);

                String str_qty = holder.tvQty.getText().toString();
                int qty = Integer.parseInt(str_qty);

                if (qty != 0) {

                    int qtyStockMinusClick = Integer.parseInt(holder.tvUnit.getText().toString());

                    holder.tvUnit.setText((qtyStockMinusClick + 1) + "");



                    Log.e("btnMinus", "" + qty);

                    if (qty == 1) {
                        Log.e("", "inside 0 qty");
                        DB.delete_byID(productCode);
                        qty = qty - 1;
                        String final_str_qty = "" + qty;

                        objSellerProductPOJO.setQty(final_str_qty);
                        holder.tvQty.setText(objSellerProductPOJO.getQty()+"");


                    } else {

                        qty = qty - 1;
                        String final_str_qty = "" + qty;

                        objSellerProductPOJO.setQty(final_str_qty);
                        holder.tvQty.setText(objSellerProductPOJO.getQty()+"");


                        double intPrice = Double.parseDouble(price);
                        double totPrice = qty * intPrice;

                        DB.updateProductQty(productCode, qty, totPrice);
                    }

                    if (context instanceof ProductListActivity)
                        totPrice = DB.getSumPrice();
                    Log.e("all price insert : ", "" + totPrice);
                    count = DB.getProfilesCount();
                    Log.e("count from db", "" + count);
                    ((ProductListActivity) context).showCartItem(count, totPrice);

                }
            } else {
                Toast.makeText(context, "Product out of stock!!", Toast.LENGTH_SHORT).show();
            }
            notifyDataSetChanged();
        }
    });


    holder.imagefavorite.setOnClickListener(new View.OnClickListener() {
        @Override
        public void onClick(View v) {

            Log.e("position", "all position" + position);
            if (isPressed)
                holder.imagefavorite.setBackgroundResource(R.drawable.ic_not_favourite);
            else
                holder.imagefavorite.setBackgroundResource(R.drawable.favourite_icon);

            isPressed = !isPressed;
        }
    });

}

@Override
public int getItemViewType(int position) {
    return super.getItemViewType(position);
}


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



class ViewHolder extends RecyclerView.ViewHolder {

    public TextView tvProductName;
    public TextView tvUnit;
    public TextView tvPrice;
    public TextView tvQty;
    public ImageView ivProduct;
    public ImageView imagefavorite;
    //  public EditText edqntiry;
    public Button btnPlus;
    public Button btnMinus;

    public ViewHolder(View itemView) {
        super(itemView);
        ivProduct = (ImageView) itemView.findViewById(R.id.ivProduct);
        tvProductName = (TextView) itemView.findViewById(R.id.tvProductName);
        tvUnit = (TextView) itemView.findViewById(R.id.tvUnit);
        tvPrice = (TextView) itemView.findViewById(R.id.tvPrice);
        tvQty = (TextView) itemView.findViewById(R.id.tvQty);
        btnPlus = (Button) itemView.findViewById(R.id.btnPlus);
        btnMinus = (Button) itemView.findViewById(R.id.btnMinus);
        imagefavorite = (ImageView) itemView.findViewById(R.id.imagefavorite);
    }

}
}

当我要接近数量时，屏幕下方显示

enter image description here

当我向下滚动向上然后在屏幕下方显示

enter image description here

3 个答案:

答案 0 :(得分：2)

您没有在onBindViewHolder方法中设置holder.tvQty的初始值。

当您更新holder.btnPlus或holder.btnMinus侦听器中holder.tvQty的值时，您应该将该值保存在objSellerProductPOJO中的某个位置：

objSellerProductPOJO.setQty(final_str_qty)

然后在：

holder.tvPrice.setText(objSellerProductPOJO.getPrice());

添加：

holder.tvQty.setText(objSellerProductPOJO.getQty());

答案 1 :(得分：0)

您需要在

后添加或减去更新productListDetails变量

holder.tvQty.setText（final_str_qty）;

使用notifydatasetchange（）

通知适配器

答案 2 :(得分：0)

在onClick（）方法中，使用 getAdapterPosition（）替换onBindViewHolder（）方法的位置参数。

替换

SellerProductPOJO objSellerProduct = productListDetails.get(position);
SellerProductPOJO objSellerProductDeduct = productListDetails.get(position);

到

SellerProductPOJO objSellerProduct = productListDetails.get(getAdapterPosition());
SellerProductPOJO objSellerProductDeduct = productListDetails.get(getAdapterPosition());
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