购物车实现

自定义二级列表

public class MyExpandableListView extends ExpandableListView{

public MyExpandableListView(Context context) {

super(context);

}

public MyExpandableListView(Context context, AttributeSet attrs) {

super(context, attrs);

}

public MyExpandableListView(Context context, AttributeSet attrs, int defStyleAttr) {

super(context, attrs, defStyleAttr);

}

@Override

protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {

// TODO Auto-generated method stub

int expandSpec = MeasureSpec.makeMeasureSpec(Integer.MAX_VALUE >> 2,

MeasureSpec.AT_MOST);

super.onMeasure(widthMeasureSpec, expandSpec);

}

}


二级列表适配器

public class Adapter_Cart extends BaseExpandableListAdapter {

private Context context;

private CartBean cartBean;

private sendFlag sendFlag;

public Adapter_Cart(Context context, CartBean cartBean, Adapter_Cart.sendFlag sendFlag) {

this.context = context;

this.cartBean = cartBean;

this.sendFlag = sendFlag;

}

@Override

public int getGroupCount() {

return cartBean.getData().size();

}

@Override

public int getChildrenCount(int groupPosition) {

return cartBean.getData().get(groupPosition).getList().size();

}

@Override

public Object getGroup(int groupPosition) {

return cartBean.getData().get(groupPosition);

}

@Override

public Object getChild(int groupPosition, int childPosition) {

return cartBean.getData().get(groupPosition).getList().get(childPosition);

}

@Override

public long getGroupId(int groupPosition) {

return groupPosition;

}

@Override

public long getChildId(int groupPosition, int childPosition) {

return childPosition;

}

@Override

public boolean hasStableIds() {

return true;

}

@Override

public View getGroupView(final int groupPosition, boolean isExpanded, View convertView, ViewGroup parent) {

final GroupHolder holder;

if (convertView == null) {

//获取组布局

convertView = View.inflate(context, R.layout.group_item, null);

//实例GroupHolder

holder = new GroupHolder();

//获取控件

holder.groupCheck = (CheckBox) convertView.findViewById(R.id.group_check);

holder.groupName = (TextView) convertView.findViewById(R.id.group_name);

convertView.setTag(holder);

} else {

holder = (GroupHolder) convertView.getTag();

}

//赋值

holder.groupName.setText(cartBean.getData().get(groupPosition).getSellerName());

holder.groupCheck.setChecked(cartBean.getData().get(groupPosition).isSischecked());

//全选点击事件

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

@Override

public void onClick(View v) {

//得到状态

boolean checked = holder.groupCheck.isChecked();

//赋值

cartBean.getData().get(groupPosition).setSischecked(checked);

//店铺是否选择 此店铺所有商品也跟着是否选择

for (int i = 0; i < cartBean.getData().get(groupPosition).getList().size(); i++) {

cartBean.getData().get(groupPosition).getList().get(i).setIschecked(checked);

}

//刷新适配器

notifyDataSetChanged();

//总价格 总数量 是否全选

double t = 0;

int count = 0;

boolean flag = true;

for (int i = 0; i < cartBean.getData().size(); i++) {

for (int j = 0; j < cartBean.getData().get(i).getList().size(); j++) {

if (cartBean.getData().get(i).getList().get(j).ischecked()){

t+=cartBean.getData().get(i).getList().get(j).getPrice()*cartBean.getData().get(i).getList().get(j).getNum();

count+=cartBean.getData().get(i).getList().get(j).getNum();

}

}

if (!cartBean.getData().get(i).isSischecked()){

flag = false;

}

}

//接口传值

sendFlag.sendFlags(flag);

sendFlag.sendTotalAndCounts(t,count);

}

});

return convertView;

}

@Override

public View getChildView(final int groupPosition, final int childPosition, boolean isLastChild, View convertView, ViewGroup parent) {

final ChildHolder holder;

if (convertView == null) {

//获取组布局

convertView = View.inflate(context, R.layout.child_item, null);

//实例GroupHolder

holder = new ChildHolder();

//获取控件

holder.childCheck = (CheckBox) convertView.findViewById(R.id.child_check);

holder.childTitle = (TextView) convertView.findViewById(R.id.child_title);

holder.childPrice = (TextView) convertView.findViewById(R.id.child_price);

holder.childSubhead = (TextView) convertView.findViewById(R.id.child_subhead);

holder.childPic = (ImageView) convertView.findViewById(R.id.child_pic);

holder.addsub = (NumberAddSubView) convertView.findViewById(R.id.addsub);

convertView.setTag(holder);

} else {

holder = (ChildHolder) convertView.getTag();

}

holder.addsub.setMaxValue(Integer.MAX_VALUE);

String[] strings = cartBean.getData().get(groupPosition).getList().get(childPosition).getImages().split("\\|");

Glide.with(context).load(strings[0]).into(holder.childPic);

holder.childCheck.setChecked(cartBean.getData().get(groupPosition).getList().get(childPosition).ischecked());

holder.childTitle.setText(cartBean.getData().get(groupPosition).getList().get(childPosition).getTitle());

holder.childSubhead.setText(cartBean.getData().get(groupPosition).getList().get(childPosition).getSubhead());

holder.childPrice.setText(cartBean.getData().get(groupPosition).getList().get(childPosition).getPrice()+"");

holder.addsub.setValue(cartBean.getData().get(groupPosition).getList().get(childPosition).getNum());

//复选框点击监听

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

@Override

public void onClick(View v) {

boolean checked = holder.childCheck.isChecked();

//赋值

cartBean.getData().get(groupPosition).getList().get(childPosition).setIschecked(checked);

//确定店铺状态

boolean s_flag = true;

for (int i = 0; i < cartBean.getData().get(groupPosition).getList().size(); i++) {

if (!cartBean.getData().get(groupPosition).getList().get(i).ischecked()){

s_flag = false;

}

}

cartBean.getData().get(groupPosition).setSischecked(s_flag);

//刷新适配器

notifyDataSetChanged();

//总价格 总数量 是否全选

double t = 0;

int count = 0;

boolean flag = true;

for (int i = 0; i < cartBean.getData().size(); i++) {

for (int j = 0; j < cartBean.getData().get(i).getList().size(); j++) {

if (cartBean.getData().get(i).getList().get(j).ischecked()){

t+=cartBean.getData().get(i).getList().get(j).getPrice()*cartBean.getData().get(i).getList().get(j).getNum();

count+=cartBean.getData().get(i).getList().get(j).getNum();

}

}

if (!cartBean.getData().get(i).isSischecked()){

flag = false;

}

}

//接口传值

sendFlag.sendFlags(flag);

sendFlag.sendTotalAndCounts(t,count);

}

});

return convertView;

}

@Override

public boolean isChildSelectable(int groupPosition, int childPosition) {

return true;

}

class GroupHolder {

private CheckBox groupCheck;

private TextView groupName;

}

class ChildHolder {

private CheckBox childCheck;

private TextView childTitle;

private TextView childSubhead;

private TextView childPrice;

private ImageView childPic;

private NumberAddSubView addsub;

}

public interface sendFlag {

void sendFlags(boolean flag);

void sendTotalAndCounts(double t, int count);

}

}

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