购物车改进了一下

于 2018-12-19 19:42:56 发布
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本文链接：https://blog.youkuaiyun.com/lixiaoliang0723/article/details/85106580
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这是一个仿的购物车
首先把布局文件贴出来

这个是自定义的加减器
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout
    android:orientation="horizontal"
    android:gravity="center_vertical"
    android:layout_gravity="center_vertical"
    xmlns:android="http://schemas.android.com/apk/res/android" android:layout_width="@dimen/dp_60"
    android:layout_height="@dimen/dp_30">
    <TextView
        android:background="#ffffff"
        android:layout_weight="1"
        android:id="@+id/sub_tv"
        android:layout_width="0dp"
        android:layout_height="match_parent"
        android:gravity="center"
        android:text="-"
        android:textSize="16sp" />

    <TextView
        android:text="1"
        android:layout_marginLeft="2dp"
        android:background="#ffffff"
        android:layout_weight="1"
        android:id="@+id/product_number_tv"
        android:layout_width="0dp"
        android:layout_height="match_parent"
        android:gravity="center"
        />

    <TextView
        android:id="@+id/add_tv"
        android:layout_width="wrap_content"
        android:layout_height="match_parent"
        android:layout_marginLeft="2dp"
        android:layout_weight="1"
        android:background="#ffffff"
        android:gravity="center"
        android:text="+"
        android:textSize="16sp" />

</LinearLayout>
购物车的布局
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:orientation="vertical"
    android:layout_height="match_parent"
    tools:context=".fragment.GouWuFragment">
    <RelativeLayout
        android:layout_marginTop="@dimen/dp_10"
        android:layout_width="match_parent"
        android:layout_height="0dp"
        android:layout_weight="1">
        <TextView
            android:text="购物车"
            android:textSize="@dimen/sp_18"
            android:layout_centerHorizontal="true"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content" />
        <TextView
            android:text="编辑"
            android:textSize="@dimen/sp_16"
            android:layout_marginRight="@dimen/dp_20"
            android:layout_alignParentRight="true"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content" />
    </RelativeLayout>
    <ExpandableListView
        android:id="@+id/liebiao"
        android:layout_width="match_parent"
        android:layout_height="0dp"
        android:layout_weight="8"></ExpandableListView>
    <RelativeLayout
        android:layout_width="match_parent"
        android:layout_height="0dp"
        android:layout_weight="1">
        <CheckBox
            android:id="@+id/quanxuan"
            android:layout_marginLeft="@dimen/dp_15"
            android:layout_centerVertical="true"
            android:layout_width="@dimen/dp_16"
            android:layout_height="@dimen/dp_16" />
        <TextView
            android:id="@+id/zanyong"
            android:textSize="@dimen/sp_14"
            android:text="全选"
            android:layout_marginLeft="@dimen/dp_5"
            android:layout_centerVertical="true"
            android:layout_toRightOf="@id/quanxuan"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content" />
        <TextView
            android:id="@+id/price"
            android:textSize="@dimen/sp_14"
            android:text="￥666.00"
            android:layout_marginLeft="@dimen/dp_55"
            android:layout_centerVertical="true"
            android:layout_toRightOf="@id/zanyong"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content" />
        <Button
            android:id="@+id/qujiesuan"
            android:text="去结算"
            android:textColor="#ffffff"
            android:background="#e93229"
            android:layout_alignParentRight="true"
            android:layout_width="@dimen/dp_100"
            android:layout_height="match_parent" />
    </RelativeLayout>
</LinearLayout>
两个条目的布局
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout
    android:orientation="horizontal"
    android:descendantFocusability="blocksDescendants"
    xmlns:android="http://schemas.android.com/apk/res/android" android:layout_width="match_parent"
    android:layout_height="match_parent">
    <CheckBox
        android:id="@+id/fu_check"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content" />
    <TextView
        android:id="@+id/fu_title"
        android:layout_width="wrap_content"
        android:text="玩具店"
        android:layout_height="wrap_content" />
</LinearLayout>
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout
    android:orientation="horizontal"
    android:descendantFocusability="blocksDescendants"
    xmlns:android="http://schemas.android.com/apk/res/android" android:layout_width="match_parent"
    android:layout_height="match_parent">
    <CheckBox
        android:id="@+id/zi_check"
        android:layout_marginTop="@dimen/dp_50"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content" />
    <RelativeLayout
        android:layout_width="match_parent"
        android:layout_height="wrap_content">
        <com.facebook.drawee.view.SimpleDraweeView
            android:id="@+id/iv_head_background"
            android:layout_width="@dimen/dp_120"
            android:layout_height="@dimen/dp_120"/>
        <TextView
            android:id="@+id/zi_title"
            android:text="sssss"
            android:layout_toRightOf="@id/iv_head_background"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content" />
        <TextView
            android:id="@+id/zi_price"
            android:text="sssss"
            android:layout_marginTop="@dimen/dp_100"
            android:layout_toRightOf="@id/iv_head_background"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content" />
        <bwie.com.lixiaoliang20181217.AddView
            android:id="@+id/zi_jiajian"
            android:layout_width="wrap_content"
            android:layout_marginTop="@dimen/dp_90"
            android:layout_alignParentRight="true"
            android:layout_height="wrap_content">
        </bwie.com.lixiaoliang20181217.AddView>
        <TextView
            android:id="@+id/zi_zeng"
            android:text="ssdfsfdsfd"
            android:layout_marginTop="@dimen/dp_120"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
             />
    </RelativeLayout>

</LinearLayout>

fragment的代码

public class GouWuFragment extends Fragment implements V_GoWu {

    @BindView(R.id.liebiao)
    ExpandableListView liebiao;
    @BindView(R.id.quanxuan)
    CheckBox quanxuan;
    @BindView(R.id.zanyong)
    TextView zanyong;
    @BindView(R.id.price)
    TextView price;
    @BindView(R.id.qujiesuan)
    Button qujiesuan;
    Unbinder unbinder;
    private P_GoWuCheIm mWuCheIm;
    private Sadaptrer mSadaptrer;

    @Override
    public View onCreateView(LayoutInflater inflater, ViewGroup container,
                             Bundle savedInstanceState) {
        // Inflate the layout for this fragment
        View view = inflater.inflate(R.layout.fragment_gou_wu, container, false);
        unbinder = ButterKnife.bind(this, view);
        EventBus.getDefault().register(this);
        mWuCheIm = new P_GoWuCheIm(this);
        mWuCheIm.setGoWu();
        initData();
        return view;
    }

    private void initData() {
    }

    @Override
    public void onDestroyView() {
        super.onDestroyView();
        unbinder.unbind();
    }

    @Override
    public void setGo(List<GoWuBean.DataBean> data1) {
        //判断数据是否非空
        if (data1 != null) {
            //给适配器赋值
            mSadaptrer = new Sadaptrer(data1, getContext());
            liebiao.setAdapter(mSadaptrer);
            //展开二级列表
            for(int x=0; x<data1.size(); x++){
                liebiao.expandGroup(x);
            }
        }
    }
    //当全选的按钮被点击的时候
    @OnClick(R.id.quanxuan)
    public void onViewClicked() {
        //获取当前条目的状态
        boolean allProductsSelected = mSadaptrer.isAllProductsSelected();
        //给你的条目设置值
        mSadaptrer.changeStatus(!allProductsSelected);
        //刷新适配器
        mSadaptrer.notifyDataSetChanged();
    }
    //接收适配器传过来的值
    @Subscribe
    public void onMessageEvent(Message event) {
        //接收适配器（Myadpader）传递过来的值 ，将全选的状态设置为true或者false
        quanxuan.setChecked(event.isIsboon());
    }
    //接收适配器传过来的数量和总价
    @Subscribe
    public void onMessageEvent(CountPrice event) {
        qujiesuan.setText("去结算{" + event.getNum() + "}");
        price.setText("￥" + event.getPrice());
    }
    @Override
    public void onDestroy() {
        super.onDestroy();
        //注销EventBus
        if(EventBus.getDefault().isRegistered(this)){
            EventBus.getDefault().unregister(this);
        }
    }
}

最后是Adapter适配器里的代码

public class Sadaptrer extends BaseExpandableListAdapter {
    private List<GoWuBean.DataBean> mList;
    private Context mContext;

    public Sadaptrer(List<GoWuBean.DataBean> goWuBeans, Context context) {
        mList = goWuBeans;
        mContext = context;
    }

    @Override
    public int getGroupCount() {
        return mList==null ?0 :mList.size();
    }

    @Override
     public int getChildrenCount(int i) {
        return mList.get(i).getList()==null ? 0:mList.get(i).getList().size();
    }



    @Override
    public View getGroupView(final int i, boolean b, View view, ViewGroup viewGroup) {
        GoWuBean.DataBean dataBean = mList.get(i);
        final ViewHolderFu vh;
        if (view==null){
            //
            vh=new ViewHolderFu();
            view=View.inflate(mContext,R.layout.item,null);
            vh.fut1=view.findViewById(R.id.fu_title);
            vh.fucheck=view.findViewById(R.id.fu_check);
            view.setTag(vh);
        }else {
            vh= (ViewHolderFu) view.getTag();
        }
        boolean b1 = ziTiaoMuSelected(i);
        vh.fucheck.setChecked(b1);
        vh.fut1.setText(dataBean.getSellerName());
        vh.fucheck.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View view) {
                    //获取当前的条目是否选中
                    boolean checked = vh.fucheck.isChecked();
                    //让下面的子条目也选中
                    ziXuanZong(i,checked);
                    //使用EventBus进行传值
                    EventBus.getDefault().post(setJiSuan());
                    //刷新适配器
                    notifyDataSetChanged();
            }
        });
        return view;
    }

    @Override
    public View getChildView(final int i, final int i1, boolean b, View view, ViewGroup viewGroup) {
        GoWuBean.DataBean dataBean = mList.get(i);
        final GoWuBean.DataBean.ShuJu shuJu = dataBean.getList().get(i1);
        final ViewHolderZI vh;
        if (view==null){
            //获取控件
            vh=new ViewHolderZI();
            view=View.inflate(mContext,R.layout.ziitem,null);
            vh.zikan=view.findViewById(R.id.zi_check);
            vh.title=view.findViewById(R.id.zi_title);
            vh.mDraweeView=view.findViewById(R.id.iv_head_background);
            vh.mAddView=view.findViewById(R.id.zi_jiajian);
            vh.price=view.findViewById(R.id.zi_price);
            vh.hua=view.findViewById(R.id.zi_zeng);
            view.setTag(vh);
        }else {
            vh= (ViewHolderZI) view.getTag();
        }
        //给控件赋值
        vh.zikan.setChecked(shuJu.getSelected()==1);
        vh.title.setText(shuJu.getTitle());
        vh.price.setText(shuJu.getPrice()+"");
        vh.hua.setText(shuJu.getSubhead());
        String images = shuJu.getImages();
        String strs=images.split("\\|")[0];
        vh.mDraweeView.setImageURI(Uri.parse(strs));
        vh.mAddView.setNumber(shuJu.getNum());
        vh.mAddView.setLinJianTin(new AddView.LinJianTin() {
            @Override
            public void kanYiKan(int num) {
                //点击加减号，加减的时候进行赋值
                changeNumber(i,i1,num);
                //使用EventBus进行传值
                EventBus.getDefault().post(setJiSuan());
                notifyDataSetChanged();
            }
        });
        vh.zikan.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View view) {
                    //mOnCartList.onProduct(i,i1);
                //判断当前的条目是否选中
                boolean checked = vh.zikan.isChecked();
                //选中给一个1否给0
                if (checked){
                    shuJu.setSelected(1);
                }else {
                    shuJu.setSelected(0);
                }
                //使用EventBus进行传值
                EventBus.getDefault().post(setJiSuan());
                notifyDataSetChanged();
            }
        });
        return view;
    }
    //这个方法就是判断子条目是否全部选中
    public boolean ziTiaoMuSelected(int i){
        GoWuBean.DataBean dataBean = mList.get(i);
        List<GoWuBean.DataBean.ShuJu> list = dataBean.getList();
        for (GoWuBean.DataBean.ShuJu data:list) {
            if (data.getSelected()==0){
                return false;
            }
        }
        return true;
    }
    //判断是否全部选中
    public boolean isAllProductsSelected(){
        for (int i = 0; i < mList.size(); i++) {
            GoWuBean.DataBean dataBean = mList.get(i);
            List<GoWuBean.DataBean.ShuJu> list = dataBean.getList();
            for (int j = 0; j < list.size(); j++) {
                GoWuBean.DataBean.ShuJu shuJu = list.get(j);
                if (shuJu.getSelected()==0){
                    return false;
                }
            }
        }
        return true;
    }
    /**
     * 改变全选的状态
     */
    private void QuanxuangZT(boolean flag){
        Message message = new Message(flag);
        EventBus.getDefault().post(message);
    }
    //计算总量
    public CountPrice setJiSuan(){
        int number=0;
        double price=0;
        //这个值是记录你当前状态是否全选，默认为全选
        int s=1;
        for (int i = 0; i < mList.size(); i++) {
            GoWuBean.DataBean dataBean = mList.get(i);
            List<GoWuBean.DataBean.ShuJu> list = dataBean.getList();
            for (int j = 0; j < list.size(); j++) {
                GoWuBean.DataBean.ShuJu shuJu = list.get(j);
                if (shuJu.getSelected()==1){
                    number+=shuJu.getNum();
                    price+=shuJu.getNum()*shuJu.getPrice();
                }else {
                    s=0;
                }
            }
        }
        //判断如果是1全选，否则则不选
        if (s==0){
            QuanxuangZT(false);
        }else {
            QuanxuangZT(true);
        }
        CountPrice countPrice = new CountPrice(price, number);
        return countPrice;
    }
    //点击父条目时让你的字条目全部选中
    public void ziXuanZong(int i,boolean bo){
            GoWuBean.DataBean dataBean = mList.get(i);
            List<GoWuBean.DataBean.ShuJu> list = dataBean.getList();
            for (int j = 0; j < list.size(); j++) {
                GoWuBean.DataBean.ShuJu shuJu = list.get(j);
                shuJu.setSelected(bo ? 1:0);
            }
    }
    //全选
    public void changeStatus(boolean bole){
        for (int i = 0; i < mList.size(); i++) {
            GoWuBean.DataBean dataBean = mList.get(i);
            List<GoWuBean.DataBean.ShuJu> list = dataBean.getList();
            for (int j = 0; j < list.size(); j++) {
                GoWuBean.DataBean.ShuJu shuJu = list.get(j);
                shuJu.setSelected(bole?1:0);
            }
        }
        EventBus.getDefault().post(setJiSuan());
    }
    //点击加减号给数量进行赋值
    public void changeNumber(int poist,int po,int number){
        GoWuBean.DataBean dataBean = mList.get(poist);
        List<GoWuBean.DataBean.ShuJu> list = dataBean.getList();
        GoWuBean.DataBean.ShuJu shuJu = list.get(po);
        shuJu.setNum(number);
    }


    class ViewHolderFu{
        CheckBox fucheck;
        TextView fut1;
    }
    class ViewHolderZI{
        CheckBox zikan;
        AddView mAddView;
        SimpleDraweeView mDraweeView;
        TextView title,price,hua;
    }
    @Override
    public boolean isChildSelectable(int i, int i1) {
        return false;
    }
    @Override
    public Object getGroup(int i) {
        return null;
    }

    @Override
    public Object getChild(int i, int i1) {
        return null;
    }

    @Override
    public long getGroupId(int i) {
        return 0;
    }

    @Override
    public long getChildId(int i, int i1) {
        return 0;
    }

    @Override
    public boolean hasStableIds() {
        return false;
    }
}
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