购物车选择复选框 1

最新推荐文章于 2022-05-24 19:36:57 发布

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最新推荐文章于 2022-05-24 19:36:57 发布

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本文链接：https://blog.youkuaiyun.com/weixin_44513400/article/details/88219726

这是一个关于购物车选择复选框实现的代码示例，使用了RecyclerView Adapter，并结合JSON数据处理商品选择状态。通过HashMap存储商品ID及其选择状态。

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package com.example.xiangmu.adapter;

import android.content.Context;
import android.support.annotation.NonNull;
import android.support.v7.widget.RecyclerView;
import android.view.View;
import android.view.ViewGroup;
import android.widget.CheckBox;
import android.widget.ImageView;
import android.widget.LinearLayout;
import android.widget.TextView;

import com.bumptech.glide.Glide;
import com.example.xiangmu.R;
import com.example.xiangmu.custom.CustomShopCar;

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

import java.util.HashMap;
import java.util.Map;

ic class ShopCarAdapter extends RecyclerView.Adapter<RecyclerView.ViewHolder> {
Context context;
JSONArray result;
private Map<String,Boolean> map=new HashMap<>();

//-------------------------------------------------------全选接口
public interface onQuanCheckLisenter{
    void quancheck(boolean flag);
}
private onQuanCheckLisenter quanCheckLisenter;

public void setonQuanCheckLisenter(onQuanCheckLisenter quanCheckLisenter){
    this.quanCheckLisenter=quanCheckLisenter;
}




public ShopCarAdapter(Context context, JSONArray result) {
this.context=context;
this.result=result;
setCheckData(false);
}

//写一个获取ck状态的方法

private void setCheckData(boolean checkflag){
map.clear();
for (int c=0;c<result.length();c++){
try {
JSONObject jsonObject = result.getJSONObject©;
String id = jsonObject.getString(“commodityId”);
map.put(id,checkflag);
} catch (JSONException e) {
e.printStackTrace();
}
}
}

//一个刷新的方法
public void notifCheckData(boolean checkflag){
    setCheckData(checkflag);
    notifyDataSetChanged();
}




@NonNull
@Override
public RecyclerView.ViewHolder onCreateViewHolder(@NonNull ViewGroup viewGroup, int i) {
    View view=LinearLayout.inflate(context,R.layout.shopcar,null);
    ViewHolder viewHolder=new ViewHolder(view);
    return viewHolder;
}

@Override
public void onBindViewHolder(@NonNull RecyclerView.ViewHolder viewHolder, int i) {
    //
    final ViewHolder viewHolder1= (ViewHolder) viewHolder;
    //解析数据
    try {
        JSONObject jsonObject = result.getJSONObject(i);
        String commodityName = jsonObject.getString("commodityName");
          String masterPic = jsonObject.getString("masterPic");
        final String id = jsonObject.getString("commodityId");
        //设置值
        viewHolder1.title.setText(commodityName);
        Glide.with(context).load(masterPic).into(viewHolder1.img);

        //-------------------------------------------------------------------------
      viewHolder1.ck1.setChecked(map.get(id));
        viewHolder1.ck1.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                boolean checked = viewHolder1.ck1.isChecked();
                map.put(id,checked);
                boolean flag=true;
                for (String k:map.keySet()){
                    Boolean aBoolean = map.get(k);
                    if (!aBoolean){
                        flag=false;
                    }else {
                        if (quanCheckLisenter!=null){
                            quanCheckLisenter.quancheck(flag);
                        }
                    }
                }
            }
        });


        //适配器里的自定义布局调用接口

        viewHolder1.csv.setonAddLisenter(new CustomShopCar.onAddLisenter() {
            @Override
            public void onadd(int c) {

            }
        });

        viewHolder1.csv.setonJianLisenter(new CustomShopCar.onJianLisenter() {
            @Override
            public void onjian(int p) {

            }
        });

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

}

@Override
public int getItemCount() {
    return result.length();
}
private class ViewHolder extends RecyclerView.ViewHolder{

    private final ImageView img;
    private final TextView title;
    private final CustomShopCar csv;
    private final CheckBox ck1;

    public ViewHolder(@NonNull View itemView) {
        super(itemView);
        img = itemView.findViewById(R.id.shopcar_img);
        title = itemView.findViewById(R.id.shopcar_title);
        csv = itemView.findViewById(R.id.shopcar_cv);
        ck1 = itemView.findViewById(R.id.ck1);
    }
}

}