Android疑难杂症-购物车商品种类和商品列表联动效果

Android疑难杂症
  1. 1. 说明
  2. 2. 效果图
  3. 3. 实体类
  4. 4. 菜单adapter
  5. 5. 菜单点击监听
  6. 6. 菜单adapter
  7. 7. 内容滚动监听
  8. 8. 数据模拟与填充

说明

基于BaseRecyclerViewAdapterHelper

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compile 'com.github.CymChad:BaseRecyclerViewAdapterHelper:2.9.30'

效果图

实体类

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package com.keqiang.gftstore.entity;
  
import com.chad.library.adapter.base.entity.AbstractExpandableItem;
import com.chad.library.adapter.base.entity.MultiItemEntity;
  
import java.util.List;
  
/**
 * Created by zhouzhuo810 on 2018/5/15.
 */
public class CateEntity extends AbstractExpandableItem<CateEntity.ContentEntity> implements MultiItemEntity {
    private String name;
    private boolean choose;
    private int index;
    private List<ContentEntity> contents;
  
    public int getIndex() {
        return index;
    }
  
    public void setIndex(int index) {
        this.index = index;
    }
  
    public String getName() {
        return name;
    }
  
    public void setName(String name) {
        this.name = name;
    }
  
    public boolean isChoose() {
        return choose;
    }
  
    public void setChoose(boolean choose) {
        this.choose = choose;
    }
  
    public List<ContentEntity> getContents() {
        return contents;
    }
  
    public void setContents(List<ContentEntity> contents) {
        this.contents = contents;
    }
  
    @Override
    public int getLevel() {
        return 0;
    }
  
    @Override
    public int getItemType() {
        return 0;
    }
  
    public static class ContentEntity implements MultiItemEntity {
        private String name;
        private String picUrl;
        private Float price;
        private int count;
        private int index;
  
        public int getIndex() {
            return index;
        }
  
        public void setIndex(int index) {
            this.index = index;
        }
  
        public String getName() {
            return name;
        }
  
        public void setName(String name) {
            this.name = name;
        }
  
        public String getPicUrl() {
            return picUrl;
        }
  
        public void setPicUrl(String picUrl) {
            this.picUrl = picUrl;
        }
  
        public Float getPrice() {
            return price;
        }
  
        public void setPrice(Float price) {
            this.price = price;
        }
  
        public int getCount() {
            return count;
        }
  
        public void setCount(int count) {
            this.count = count;
        }
  
        @Override
        public int getItemType() {
            return 1;
        }
    }
}

菜单adapter

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import android.content.Context;
import android.util.TypedValue;
import android.widget.TextView;
  
import com.keqiang.gftstore.R;
import com.keqiang.gftstore.entity.CateEntity;
import com.zhy.autolayout.utils.AutoUtils;
  
import java.util.List;
  
import zhouzhuo810.me.zzandframe.ui.adapter.RvAutoBaseAdapter;
  
/**
 * Created by zhouzhuo810 on 2018/5/15.
 */
public class CateRvAdapter extends RvAutoBaseAdapter<CateEntity> {
  
    public CateRvAdapter(Context context, List<CateEntity> data) {
        super(context, data);
    }
  
    @Override
    protected int getLayoutId(int viewType) {
        return R.layout.rv_item_cate;
    }
  
    @Override
    protected void fillData(ViewHolder holder, CateEntity item, int position) {
        holder.setText(R.id.tv_name, item.getName())
                .setBackgroundRes(R.id.list_root, item.isChoose() ? R.color.colorWhite : R.color.colorBg)
                .setTextColor(R.id.tv_name, item.isChoose() ? 0xff000000 : 0xff888888)
                .setGone(R.id.iv_icon, position != 0);
        TextView tvName = holder.getView(R.id.tv_name);
        if (item.isChoose()) {
            tvName.setTextSize(TypedValue.COMPLEX_UNIT_PX, AutoUtils.getPercentWidthSize(41));
            tvName.requestLayout();
        } else {
            tvName.setTextSize(TypedValue.COMPLEX_UNIT_PX, AutoUtils.getPercentWidthSize(36));
            tvName.requestLayout();
        }
    }
  
    public void setSelection(int position) {
        if (getData() != null) {
            for (CateEntity entity : getData()) {
                entity.setChoose(false);
            }
            getData().get(position).setChoose(true);
            notifyDataSetChanged();
        }
    }
}

菜单点击监听

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cateRvAdapter.setOnItemClickListener(new RvAutoBaseAdapter.OnItemClickListener() {
    @Override
    public void onItemClick(View view, int position) {
        if (cateRvAdapter.getData() != null) {
            for (CateEntity entity : cateRvAdapter.getData()) {
                entity.setChoose(false);
            }
            cateRvAdapter.getData().get(position).setChoose(true);
            cateRvAdapter.notifyDataSetChanged();
  
            ((LinearLayoutManager)rvContent.getLayoutManager()).scrollToPositionWithOffset(contentRvAdapter.getFirstPositionOfGroup(position), 0);
        }
    }
});

菜单adapter

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import android.support.annotation.Nullable;
import android.util.Log;
import android.view.View;
import android.view.ViewGroup;
  
import com.chad.library.adapter.base.BaseMultiItemQuickAdapter;
import com.chad.library.adapter.base.BaseViewHolder;
import com.chad.library.adapter.base.entity.MultiItemEntity;
import com.keqiang.gftstore.R;
import com.keqiang.gftstore.entity.CateEntity;
import com.zhy.autolayout.utils.AutoUtils;
  
import java.util.ArrayList;
import java.util.List;
  
/**
 * Created by zhouzhuo810 on 2018/5/15.
 */
  
public class ContentRvAdapter extends BaseMultiItemQuickAdapter<MultiItemEntity, BaseViewHolder> {
  
    public ContentRvAdapter(@Nullable List<MultiItemEntity> data) {
        super(data);
        addItemType(0, R.layout.rv_item_right_title);
        addItemType(1, R.layout.rv_item_right_content);
    }
  
    @Override
    protected BaseViewHolder createBaseViewHolder(ViewGroup parent, int layoutResId) {
        BaseViewHolder baseViewHolder = super.createBaseViewHolder(parent, layoutResId);
        AutoUtils.auto(baseViewHolder.itemView);
        baseViewHolder.setNestView(R.id.iv_dec);
        baseViewHolder.setNestView(R.id.iv_add);
        return baseViewHolder;
    }
  
    @Override
    protected void convert(BaseViewHolder helper, MultiItemEntity item) {
        switch (helper.getItemViewType()) {
            case 0:
                CateEntity cate = (CateEntity) item;
                helper.setText(R.id.tv_title_name, cate.getName());
                break;
            case 1:
                CateEntity.ContentEntity content = (CateEntity.ContentEntity) item;
                helper.setText(R.id.tv_goods_name, content.getName())
                        .setText(R.id.tv_price, content.getPrice() + "")
                        .setText(R.id.tv_shop_qty, content.getCount() + "")
                        .setVisible(R.id.iv_dec, content.getCount() != 0)
                        .setVisible(R.id.tv_shop_qty, content.getCount() != 0);
                break;
        }
    }
  
    public int getFirstPositionOfGroup(int group) {
        if (getData() != null) {
            List<MultiItemEntity> data = getData();
            for (int i = 0; i < data.size(); i++) {
                MultiItemEntity multiItemEntity = data.get(i);
                if (multiItemEntity instanceof CateEntity) {
                    CateEntity cate = (CateEntity) multiItemEntity;
                    if (cate.getIndex() == group) {
                        Log.e("TTT", "i=" + i);
                        return i;
                    }
                }
            }
        }
        return 0;
    }
  
    public int getGroupForPosition(int position) {
        if (getData() != null) {
            MultiItemEntity multiItemEntity = getData().get(position);
            if (multiItemEntity instanceof CateEntity.ContentEntity) {
                CateEntity.ContentEntity content = (CateEntity.ContentEntity) multiItemEntity;
                return content.getIndex();
            } else {
                CateEntity cate = (CateEntity) multiItemEntity;
                return cate.getIndex();
            }
        }
        return 0;
    }
  
    public float countMoney() {
        float count = 0f;
        for (MultiItemEntity multiItemEntity : getData()) {
            if (multiItemEntity instanceof CateEntity.ContentEntity) {
                CateEntity.ContentEntity content = (CateEntity.ContentEntity) multiItemEntity;
                float v = content.getCount() * content.getPrice();
                count += v;
            }
        }
        return count;
    }
  
    public int getCount() {
        int count = 0;
        for (MultiItemEntity multiItemEntity : getData()) {
            if (multiItemEntity instanceof CateEntity.ContentEntity) {
                CateEntity.ContentEntity content = (CateEntity.ContentEntity) multiItemEntity;
                int v = content.getCount();
                count += v;
            }
        }
        return count;
    }
  
    public List<CateEntity.ContentEntity> getCarShop() {
        List<CateEntity.ContentEntity> list = new ArrayList<>();
        for (MultiItemEntity multiItemEntity : getData()) {
            if (multiItemEntity instanceof CateEntity.ContentEntity) {
                CateEntity.ContentEntity content = (CateEntity.ContentEntity) multiItemEntity;
                int v = content.getCount();
                if (v > 0) {
                    list.add(content);
                }
            }
        }
        return list;
    }
}

内容滚动监听

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rvContent.addOnScrollListener(new RecyclerView.OnScrollListener() {
    @Override
    public void onScrolled(RecyclerView recyclerView, int dx, int dy) {
        super.onScrolled(recyclerView, dx, dy);
        LinearLayoutManager linearLayoutManager = (LinearLayoutManager) rvContent.getLayoutManager();
        int firstVisibleItemPosition=linearLayoutManager.findFirstVisibleItemPosition();//可见范围内的第一项的位置
        int lastVisibleItemPosition=linearLayoutManager.findLastVisibleItemPosition();//可见范围内的最后一项的位置
        int itemCount=linearLayoutManager.getItemCount();//recyclerview中的item的所有的数目
 
        if (firstVisibleItemPosition > 0) {
            int group = contentRvAdapter.getGroupForPosition(firstVisibleItemPosition);
            cateRvAdapter.setSelection(group);
        }
    }
});

数据模拟与填充

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//关闭闪烁动画
((SimpleItemAnimator) rvContent.getItemAnimator()).setSupportsChangeAnimations(false);
((SimpleItemAnimator) rvShopCar.getItemAnimator()).setSupportsChangeAnimations(false);
  
String[] names = {
        "我的最爱",
        "饼干",
        "饮料",
        "方便面",
        "水果"
};
  
String[] shops = {
        "可口可乐330ml",
        "Dole都乐菲律宾高地蕉",
        "奥利奥夹心饼干",
        "可口可乐330ml",
        "Dole都乐菲律宾高地蕉",
        "奥利奥夹心饼干",
        "可口可乐330ml",
        "Dole都乐菲律宾高地蕉"
};
  
List<CateEntity> cates = new ArrayList<>();
for (int i = 0; i < names.length; i++) {
    CateEntity entity = new CateEntity();
    entity.setName(names[i]);
    entity.setChoose(i == 0);
    cates.add(entity);
    List<CateEntity.ContentEntity> contents = new ArrayList<>();
    for (int i1 = 0; i1 < shops.length; i1++) {
        CateEntity.ContentEntity contentEntity = new CateEntity.ContentEntity();
        contentEntity.setName(shops[i1]);
        contentEntity.setPrice(4f);
        contents.add(contentEntity);
    }
    entity.setContents(contents);
}
cateRvAdapter.updateAll(cates);
  
List<MultiItemEntity> list = new ArrayList<>();
for (int i = 0; i < cates.size(); i++) {
    CateEntity entity = cates.get(i);
    //设置GroupPosition
    entity.setIndex(i);
    //这个必须加！！！，不然刷新数据会重复添加。
    if (entity.getSubItems() != null) {
        entity.getSubItems().clear();
    }
    if (entity.getContents() != null) {
        for (CateEntity.ContentEntity contentEntity : entity.getContents()) {
            //设置GroupPosition
            contentEntity.setIndex(i);
            entity.addSubItem(contentEntity);
        }
    }
    list.add(entity);
}
contentRvAdapter.setNewData(list);
for (int i = 0; i < cates.size(); i++) {
    //注意！！！，这里如果adapter添加了n个header则i+n。
    contentRvAdapter.collapse(i + 1);
}
contentRvAdapter.expandAll();
Android
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