Android 二级列表购物车

一级的itemLayout

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:orientation="horizontal" android:layout_width="match_parent"
android:layout_height="match_parent">

<CheckBox
android:id="@+id/group_checkBox"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:focusable="false"
/>

<TextView
android:id="@+id/group_textView"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:textSize="18sp"
android:layout_marginLeft="10sp"
/>

</LinearLayout>

二级的itemLayout

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
android:layout_width="match_parent"
android:layout_height="match_parent">

<RelativeLayout
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:paddingBottom="24dp"
>

<CheckBox
android:id="@+id/child_checkBox"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginLeft="20dp"
android:focusable="false"
android:layout_marginBottom="10dp"
android:layout_below="@+id/child_goods_name"
android:layout_alignParentLeft="true"
android:layout_alignParentStart="true" />

<TextView
android:id="@+id/child_goods_name"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:textSize="18sp"
android:text="112"
android:layout_marginTop="24dp"
android:layout_alignParentTop="true"
android:layout_toRightOf="@+id/child_goods_img"
android:layout_toEndOf="@+id/child_goods_img" />

<ImageView
android:id="@+id/child_goods_img"
android:layout_width="100dp"
android:layout_height="100dp"
android:layout_marginLeft="11dp"
android:layout_marginStart="11dp"
app:srcCompat="@mipmap/ic_launcher"
android:layout_alignTop="@+id/child_goods_name"
android:layout_toRightOf="@+id/child_checkBox"
android:layout_toEndOf="@+id/child_checkBox" />

<TextView
android:id="@+id/child_goods_price"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignBottom="@+id/child_goods_img"
android:layout_toEndOf="@+id/child_goods_img"
android:layout_toRightOf="@+id/child_goods_img"
android:textColor="#FF6600"
android:textSize="16sp"
android:text="TextView" />

<TextView
android:id="@+id/child_goods_num"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignBottom="@+id/child_goods_price"
android:layout_alignParentEnd="true"
android:layout_alignParentRight="true"
android:layout_marginRight="5dp"
android:text="TextView" />

</RelativeLayout>

</RelativeLayout>

二级列表ExpandableListview适配器

public class ExpandableAdapter extends BaseExpandableListAdapter {

private Context context;
private CartBean cartBean;

public ExpandableAdapter(Context context, CartBean cartBean) {
this.context = context;
this.cartBean = cartBean;
}

@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 ViewHolder holder;
if (convertView == null) {
convertView = View.inflate(context, R.layout.group_item, null);
holder = new ViewHolder();
holder.checkBox = (CheckBox) convertView.findViewById(R.id.group_checkBox);
holder.textView = (TextView) convertView.findViewById(R.id.group_textView);
convertView.setTag(holder);
} else {
holder = (ViewHolder) convertView.getTag();
}

holder.textView.setText(cartBean.getData().get(groupPosition).getSellerName());
holder.checkBox.setChecked(cartBean.getData().get(groupPosition).isGroupIsChecked());

// 给多选添加点击事件
holder.<
d90a
span style="color:#660e7a;font-weight:bold;">checkBox.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {

// 先将点击的那个bean里的数据改变
if (holder.checkBox.isChecked() == true) {
cartBean.getData().get(groupPosition).setGroupIsChecked(true);

for (int i = 0; i < cartBean.getData().get(groupPosition).getList().size(); i++) {
cartBean.getData().get(groupPosition).getList().get(i).setChildIsChecked(true);
}
notifyDataSetChanged();
} else {
cartBean.getData().get(groupPosition).setGroupIsChecked(false);
for (int i = 0; i < cartBean.getData().get(groupPosition).getList().size(); i++) {
cartBean.getData().get(groupPosition).getList().get(i).setChildIsChecked(false);
}
notifyDataSetChanged();
}

panduan();

}
});

return convertView;

}

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

final ViewHolder holder;
if (convertView == null) {
convertView = View.inflate(context, R.layout.child_item, null);
holder = new ViewHolder();
holder.checkBox = (CheckBox) convertView.findViewById(R.id.child_checkBox);
holder.name = (TextView) convertView.findViewById(R.id.child_goods_name);
holder.img = (ImageView) convertView.findViewById(R.id.child_goods_img);
holder.price = (TextView) convertView.findViewById(R.id.child_goods_price);
holder.num = (TextView) convertView.findViewById(R.id.child_goods_num);
convertView.setTag(holder);
} else {
holder = (ViewHolder) convertView.getTag();
}

holder.name.setText(cartBean.getData().get(groupPosition).getList().get(childPosition).getTitle());
holder.price.setText("￥"+cartBean.getData().get(groupPosition).getList().get(childPosition).getPrice());
holder.num.setText("x"+cartBean.getData().get(groupPosition).getList().get(childPosition).getNum());
holder.checkBox.setChecked(cartBean.getData().get(groupPosition).getList().get(childPosition).isChildIsChecked());
String[] split = cartBean.getData().get(groupPosition).getList().get(childPosition).getImages().split("!");
Picasso.with(context).load(split[0]).into(holder.img);

holder.checkBox.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {

if (holder.checkBox.isChecked() == true) {
cartBean.getData().get(groupPosition).getList().get(childPosition).setChildIsChecked(true);

// 查询当前一级目录下的所有框是否选中
boolean groupCheck = true;
for (int i = 0; i < cartBean.getData().get(groupPosition).getList().size(); i++) {
if (!cartBean.getData().get(groupPosition).getList().get(i).isChildIsChecked()) {
groupCheck = false;
}
}

// 如果选中给一级的框赋值
if (groupCheck) {
cartBean.getData().get(groupPosition).setGroupIsChecked(true);
notifyDataSetChanged();
} else {
cartBean.getData().get(groupPosition).setGroupIsChecked(false);
notifyDataSetChanged();
}

} else {
cartBean.getData().get(groupPosition).getList().get(childPosition).setChildIsChecked(false);

boolean groupCheck = true;
for (int i = 0; i < cartBean.getData().get(groupPosition).getList().size(); i++) {
if (!cartBean.getData().get(groupPosition).getList().get(i).isChildIsChecked()) {
groupCheck = false;
}
}

if (groupCheck) {
cartBean.getData().get(groupPosition).setGroupIsChecked(true);
notifyDataSetChanged();
} else {
cartBean.getData().get(groupPosition).setGroupIsChecked(false);
notifyDataSetChanged();
}

}

panduan();

}
});

return convertView;

}

@Override
public boolean isChildSelectable(int groupPosition, int childPosition) {
return true;
}

class ViewHolder {
CheckBox checkBox;
TextView textView,name,price,num;
ImageView img;
}

private void panduan(){
// 然后判断是否所有的组都被选中
boolean allGroup = true;
// 如果都被选中那么给全选赋值
for (int i = 0; i < cartBean.getData().size(); i++) {
if (!cartBean.getData().get(i).isGroupIsChecked()) {
allGroup = false;
}
}

// 然后计算一下选中数量
int num = 0;
int price = 0;
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).isChildIsChecked()) {
num++;
price = price + (cartBean.getData().get(i).getList().get(j).getPrice())*(cartBean.getData().get(i).getList().get(j).getNum());
}
}
}

EventBus.getDefault().post(new ReturnCart(allGroup,num,price));

}

Fragment中的onCreate方法中将EventBus注册

/ 注册EventBus
EventBus.getDefault().register(this);

从EventBus中获取数据

//通过注解的方式指定接收消息的线程
@Subscribe(threadMode = ThreadMode.MAIN)
public void messageEvent(ReturnCart returnCart) {
all.setChecked(returnCart.isAll());
jiesuan.setText("结算("+returnCart.getNum()+")");
price.setText("￥"+returnCart.getPrice());
}

all.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
if(all.isChecked()){
isno(true,cartBean);
}else {
isno(false,cartBean);
}
}
});

private void isno(boolean ischecked,CartBean cartBean){
for (int i = 0;i < cartBean.getData().size();i++){
cartBean.getData().get(i).setGroupIsChecked(ischecked);
for (int j = 0;j<cartBean.getData().get(i).getList().size();j++){
cartBean.getData().get(i).getList().get(j).setChildIsChecked(ischecked);
}
}
adapter.notifyDataSetChanged();
jisuan(cartBean);
}

private void jisuan(CartBean cartBean){

// 然后计算一下选中数量
int num = 0;
int price = 0;
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).isChildIsChecked()) {
num++;
price = price + (cartBean.getData().get(i).getList().get(j).getPrice())*(cartBean.getData().get(i).getList().get(j).getNum());
}
}
}
jiesuan.setText("结算("+num+")");
this.price.setText("￥"+price);
}