android模仿购物车功能

android实现折叠购物车计算了子类总价,和总计,子类多图片点击图片预览放大缩小等功 能是使用第三方库实现,页面样式可以自己去调整,地址:compile ‘com.ycjiang:ImagePreview:2.2.5’
增加了全选,父级和子级联动选择,要想显示子级上面的父级价格可以扩展
//想要显示父View的价格就设置expandableAdapter.setShowGroudView(true);
//不想显示父View的价格就删除expandableAdapter.setShowGroudView(true);这句话就行
要源码的朋友可以发邮箱

废话不多说上代码
//Activity 实现类
/**

• 购物车
  */

public class ExpandableActivity extends FragmentActivity implements ExpandableAdapter.OnCallBack, IZoomMediaLoader {
private ExpandableListView expandableListView;
private List list;
private List> lists;
private ExpandableAdapter expandableAdapter;
private TextView money;
private List listImage = new ArrayList<>();
private CheckBox all;
private Integer prices;

@Override
protected void onCreate(@Nullable Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.ex);
    ZoomMediaLoader.getInstance().init(this);
    expandableListView = (ExpandableListView) findViewById(R.id.expandableListView);
    money = (TextView) findViewById(R.id.money);
    all = (CheckBox) findViewById(R.id.all);
    list = new ArrayList<>();
    lists = new ArrayList<>();
    for (int s = 0; s < 3; s++) {
        prices = 0;//初始化父类价格
        ExpandablesBean expandablesBean = new ExpandablesBean();
        expandablesBean.setName(s + "父下标");
        expandablesBean.setStates(false);
        list.add(expandablesBean);
        List lists = new ArrayList<>();
        for (int i = 0; i < 4; i++) {
            ExpandablesBean.OrderList orderList = new ExpandablesBean.OrderList();
            orderList.setName(1);
            orderList.setPrice(10);
            orderList.setStates(false);
            lists.add(orderList);
            for (int e = 0; e < 3; e++) {
                if (e == 0) {
                    orderList.getUserViewInfos().add(new ExpandablesBean.OrderList.UserViewInfo("http://b-ssl.duitang.com/uploads/blog/201312/04/20131204184148_hhXUT.jpeg"));
                } else if (e == 1) {
                    orderList.getUserViewInfos().add(new ExpandablesBean.OrderList.UserViewInfo("http://pic1.win4000.com/wallpaper/c/53cdd1f7c1f21.jpg"));
                } else if (e == 2) {
                    orderList.getUserViewInfos().add(new ExpandablesBean.OrderList.UserViewInfo("http://b-ssl.duitang.com/uploads/blog/201312/04/20131204184148_hhXUT.jpeg"));
                }
            }

        }
        list.get(s).setList(lists);
    }

    expandableAdapter = new ExpandableAdapter(list, this, this);
    //想要显示父View的价格就设置expandableAdapter.setShowGroudView(true);
    //不想显示父View的价格就删除expandableAdapter.setShowGroudView(true);这句话就行
    expandableAdapter.setShowGroudView(true);
    expandableListView.setAdapter(expandableAdapter);
    all.setOnClickListener(new View.OnClickListener() {
        @Override
        public void onClick(View v) {
            boolean isChecked = all.isChecked();
            if (isChecked) {
                setStates(isChecked);
            } else {
                setStates(isChecked);
            }
        }
    });
}

/**
 * 全选刷新当前状态
 *
 * @param isChecked
 */
private void setStates(boolean isChecked) {
    for (int s = 0; s < list.size(); s++) {
        list.get(s).setStates(isChecked);
        prices = 0;
        for (int e = 0; e < list.get(s).getList().size(); e++) {
            list.get(s).getList().get(e).setStates(isChecked);
            if (isChecked) {
                prices += list.get(s).getList().get(e).getPrice();
                list.get(s).setMoneys(prices);
            } else {
                list.get(s).setMoneys(0);
            }
        }
    }
    if (isChecked) {
        setParentNumber();
    } else {
        money.setText("合计:" + 0);
        moneysNumber = 0;
        expandableAdapter.setList(list);
        expandableAdapter.notifyDataSetChanged();
    }
}


private Integer moneys = 0, moneysNumber = 0;

/**
 * 点击减
 *
 * @param groupPosition
 * @param childPosition
 * @param view
 */
@Override
public void setCallBack(int groupPosition, int childPosition, View view, EditText editText, TextView textView) {
    orderList = list.get(groupPosition).getList().get(childPosition);
    if (orderList.getName() == 1) {//
        Toast.makeText(this, "最少购买一件商品", Toast.LENGTH_SHORT).show();
    } else {
        Integer number = orderList.getName();
        Integer price = orderList.getPrice();
        price -= 10;//计算子类下的价格
        number -= 1;//计算子类下的数量
        setChild(number, price, editText, textView);//计算所有子类下的价格
        list.get(groupPosition).getList().get(childPosition).setPrice(price);
        setParent(groupPosition, list.get(groupPosition).getStates());
    }

}


/**
 * 点击加
 *
 * @param groupPosition
 * @param childPosition
 * @param view
 */
private ExpandablesBean.OrderList orderList;

@Override
public void setCallBacks(int groupPosition, int childPosition, View view, EditText editText, TextView textView) {
    orderList = list.get(groupPosition).getList().get(childPosition);
    Integer number = orderList.getName();
    Integer price = orderList.getPrice();
    number += 1;
    price += 10;
    setChild(number, price, editText, textView);//计算所有子类下的价格
    setParent(groupPosition, list.get(groupPosition).getStates());
}

/**
 * 点击加减按钮时候变化价格
 *
 * @param groupPosition
 * @param childPosition
 * @param isChecked
 */
private int whoState;

public void setCallBackChecked(int groupPosition, int childPosition, boolean isChecked) {
    list.get(groupPosition).getList().get(childPosition).setStates(isChecked);
    whoState = 2;
    setParent(groupPosition, list.get(groupPosition).getStates());

}

/**
 * 计算每个子类的价格
 */
private void setChild(Integer number, Integer price, EditText editText, TextView textView) {
    orderList.setName(number);
    orderList.setPrice(price);
    editText.setText(orderList.getName() + "");
    textView.setText(orderList.getPrice() + "");
}

/**
 * 计算每个父类下所有子类的价格
 */
private List listState = new ArrayList<>();

public void setParent(int groupPosition, boolean isCheckedState) {
    for (int s = 0; s < list.get(groupPosition).getList().size(); s++) {
        if (list.get(groupPosition).getList().get(s).getPrice() != null) {
            if (list.get(groupPosition).getList().get(s).getStates()) {
                listState.add(s);
                moneys += list.get(groupPosition).getList().get(s).getPrice();
            }
        }
    }
    if (whoState == 1) {//父View点击的
        for (int s = 0; s < list.get(groupPosition).getList().size(); s++) {
            list.get(groupPosition).getList().get(s).setStates(isCheckedState);
        }
        list.get(groupPosition).setStates(isCheckedState);
        list.get(groupPosition).setMoneys(moneys);
    } else {//子View点击的
        if (listState.size() == list.get(groupPosition).getList().size()) {
            list.get(groupPosition).setStates(true);
            list.get(groupPosition).setMoneys(moneys);
        } else {
            list.get(groupPosition).setStates(false);
            list.get(groupPosition).setMoneys(moneys);
        }
    }
    moneys = 0;
    listState.clear();
    setParentNumber();
}

/**
 * 计算每个父类下所有子类的价格
 */
public void setParentIsChecked(int groupPosition, boolean isChecked) {
    whoState = 1;
    System.out.println(isChecked + "王");
    List orderLists = null;
    for (int s = 0; s < list.get(groupPosition).getList().size(); s++) {
        orderLists = list.get(groupPosition).getList();
        orderLists.get(s).setStates(isChecked);
    }
    list.get(groupPosition).setList(orderLists);
    list.get(groupPosition).setStates(isChecked);
}

/**
 * 计算最终价格
 */
private int state;
private List listes = new ArrayList<>();

public void setParentNumber() {
    state = 1;
    for (int i = 0; i < list.size(); i++) {//计算所有父类下的价格
        if (list.get(i).getMoneys() != null) {
            if (list.get(i).getStates()) {
                listes.add(i);
                moneysNumber += list.get(i).getMoneys();
                state = 2;
            }
        }
    }
    money.setText("合计:" + moneysNumber);
    moneysNumber = 0;
    expandableAdapter.setList(list);
    if (state == 2) {
        if (list.size() == listes.size()) {
            all.setChecked(true);
        } else {
            all.setChecked(false);
        }
        expandableAdapter.notifyDataSetChanged();
    } else {
        all.setChecked(false);
        expandableAdapter.notifyDataSetChanged();
    }
    listes.clear();
}

@Override
public void displayImage(@NonNull Fragment context, @NonNull String path, ImageView imageView, @NonNull final MySimpleTarget simpleTarget) {
    Glide.with(context).load(path)
            .asBitmap()
            .fitCenter()
            .centerCrop()
            .listener(new RequestListener() {
                @Override
                public boolean onException(Exception e, String model, Target target, boolean isFirstResource) {
                    simpleTarget.onLoadFailed(null);
                    return false;
                }

                @Override
                public boolean onResourceReady(Bitmap resource, String model, Target target, boolean isFromMemoryCache, boolean isFirstResource) {
                    simpleTarget.onResourceReady();
                    return false;
                }
            })
            .into(imageView);

}

@Override
public void displayGifImage(@NonNull Fragment context, @NonNull String path, ImageView imageView, @NonNull final MySimpleTarget simpleTarget) {
    Glide.with(context).load(path)
            .asGif()
            //可以解决gif比较几种时 ，加载过慢  //DiskCacheStrategy.NONE
            .diskCacheStrategy(DiskCacheStrategy.SOURCE)
            .dontAnimate() //去掉显示动画
            .listener(new RequestListener() {
                @Override
                public boolean onException(Exception e, String model, Target target, boolean isFirstResource) {
                    simpleTarget.onResourceReady();
                    return false;
                }

                @Override
                public boolean onResourceReady(GifDrawable resource, String model, Target target, boolean isFromMemoryCache, boolean isFirstResource) {
                    simpleTarget.onLoadFailed(null);
                    return false;
                }
            })
            .into(imageView);
}

@Override
public void onStop(@NonNull Fragment context) {
    Glide.with(context).onStop();
}

@Override
public void clearMemory(@NonNull Context c) {
    Glide.get(c).clearMemory();
}

}