Android中实现淘宝购物车RecyclerView或LIstView的嵌套选择的逻辑

使用了RecyclerView嵌套RecyclerView的方案。

购物车的第一个界面为RecyclerView，每个Item里面包含一个店铺。在Item中使用RecyclerView包含店铺和店铺的多个商品。

实现思路：

使用接口回调将第二个adapter的商品选择的监听事件回调给第一个adapter后再在第一个adapter中回调给MainActivity。

使用接口回调将第一个adapter的商品选择的监听事件回调给MainActivity。

在MainActivity中处理第一个adapter和第二个adapter的事件监听。

MainActivity：

public class MainActivity extends AppCompatActivity {
private RecyclerView recyclerView;
private CheckBox checkBox;
private recyclerAdapter adapter;
private RecyclerView.LayoutManager manager;
private List<bean> list;
private List<cbean> cbeanList,cbeanListcp;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
recyclerView = (RecyclerView) findViewById(R.id.recyclerview);
checkBox = (CheckBox) findViewById(R.id.shop_checkbox);
list = new ArrayList<>();
//第一个店铺的数据
cbeanList = new ArrayList<>();
cbean c = new cbean();
c.setText("商品");
c.setIscheck(false);
cbean c1 = new cbean();
c1.setText("商品1");
c1.setIscheck(false);
cbeanList.add(c);
cbeanList.add(c1);
bean b = new bean();
b.setIscheck(false);
b.setText("店名");
b.setList(cbeanList);
//第二个店铺的数据
cbeanListcp = new ArrayList<>();
cbean c2 = new cbean();
c2.setText("商品2");
c2.setIscheck(false);
cbean c3 = new cbean();
c3.setText("商品3");
c3.setIscheck(false);
cbeanListcp.add(c2);
cbeanListcp.add(c3);
bean b1 = new bean();
b1.setIscheck(false);
b1.setText("店名1");
b1.setList(cbeanListcp);
//不能添加有重复变量的数据
list.add(b);
list.add(b1);
manager = new LinearLayoutManager(this);
recyclerView.setLayoutManager(manager);
//优化性能
recyclerView.setHasFixedSize(true);
adapter = new recyclerAdapter(list);
recyclerView.setAdapter(adapter);
//全选CheckBox监听
checkBox.setOnCheckedChangeListener(new CompoundButton.OnCheckedChangeListener() {
@Override
public void onCheckedChanged(CompoundButton buttonView, boolean isChecked) {
if (isChecked){
for (int i = 0;i < list.size();i++){
//选择店铺
if (!list.get(i).ischeck()){
list.get(i).setIscheck(true);
}
for (int j = 0;j < list.get(i).getList().size();j++){
//选择店铺的商品
if (!list.get(i).getList().get(j).ischeck()){
list.get(i).getList().get(j).setIscheck(true);
}
}
}
}else {
//只有当点击全不选时才执行
// 解决点击取消选择店铺或商品时，
// 全选按钮取消选择状态，不会不变成全不选
if (allSelect() == list.size()){
for (int i = 0;i < list.size();i++){
if (list.get(i).ischeck()){
list.get(i).setIscheck(false);
}
for (int j = 0;j < list.get(i).getList().size();j++){
if (list.get(i).getList().get(j).ischeck()){
list.get(i).getList().get(j).setIscheck(false);
}
}
}
}
}
//更新
UpdateRecyclerView();
}
});
adapter.setCallBack(new recyclerAdapter.allCheck() {
@Override
public void OnCheckListener(boolean isSelected, int position) {
//保存店铺点击状态
list.get(position).setIscheck(isSelected);
//通知全选CheckBox的选择状态
if (allSelect() == list.size()){
checkBox.setChecked(true);
}else {
checkBox.setChecked(false);
}
if (isSelected){
for (int i = 0;i < list.get(position).getList().size();i++){
if (!list.get(position).getList().get(i).ischeck()){
list.get(position).getList().get(i).setIscheck(true);
}
}
}else {
// 解决点击取消选择商品时，
// 店铺全选按钮取消选择状态，不会不变成全不选
if (allChildSelect(position) == list.get(position).getList().size()){
for (int i = 0;i < list.get(position).getList().size();i++){
if (list.get(position).getList().get(i).ischeck()){
list.get(position).getList().get(i).setIscheck(false);
}
}
}
}
//更新
UpdateRecyclerView();
}
@Override
public void OnItemCheckListener(boolean isSelected, int parentposition, int chaildposition) {
//保存商品点击状态
list.get(parentposition).getList().get(chaildposition).setIscheck(isSelected);
//通知店铺选择的状态
if (allChildSelect(parentposition) == list.get(parentposition).getList().size()){
list.get(parentposition).setIscheck(true);
}else {
list.get(parentposition).setIscheck(false);
}
UpdateRecyclerView();
}
});
}
/*
*解决Recycleyview刷新报错问题
*/
private void UpdateRecyclerView() {
Handler handler = new Handler();
final Runnable r = new Runnable() {
public void run() {
adapter.notifyDataSetChanged();
}
};
handler.post(r);
}
//计算店铺的选择数量
private int allSelect(){
int sum = 0;
for (int i = 0; i < list.size(); i++) {
if (list.get(i).ischeck()){
sum++;
}
}
System.out.println(sum);
return sum;
}
//计算每个店铺商品的选择数量
private int allChildSelect(int position){
int sum = 0;
for (int i = 0; i < list.get(position).getList().size(); i++) {
if (list.get(position).getList().get(i).ischeck()){
sum++;
System.out.println(position+":"+i+":"+list.get(position).getList().get(i).ischeck());
}
}
return sum;
}
} 

第一个Adapter：

public class recyclerAdapter extends RecyclerView.Adapter<recyclerAdapter.MyHolder> {
private List<bean> list;
public recyclerAdapter(List<bean> list){
this.list = list;
} 

public static class MyHolder extends RecyclerView.ViewHolder{
private RecyclerView recyclerView;
private TextView textView;
private CheckBox checkBox;
private recyclerAdapter1 adapter;
private RecyclerView.LayoutManager manager;
public CheckBox getCheckBox() {
return checkBox;
}
public RecyclerView getRecyclerView() {
return recyclerView;
}
public TextView getTextView() {
return textView;
}
public MyHolder(View itemView) {
super(itemView);
recyclerView = (RecyclerView) itemView.findViewById(R.id.list_items);
textView = (TextView) itemView.findViewById(R.id.tv_name);
checkBox = (CheckBox) itemView.findViewById(R.id.checkbox0);
manager = new LinearLayoutManager(itemView.getContext());
recyclerView.setLayoutManager(manager);
}
}
@Override
public MyHolder onCreateViewHolder(ViewGroup parent, int viewType) {
View view = LayoutInflater.from(parent.getContext()).inflate(R.layout.shop_item,null);
MyHolder holder = new MyHolder(view);
return holder;
}
@Override
public void onBindViewHolder(final MyHolder holder, final int position) {
holder.adapter = new recyclerAdapter1(list.get(position).getList());
holder.recyclerView.setAdapter(holder.adapter);
holder.getTextView().setText(list.get(position).getText());
holder.getCheckBox().setChecked(list.get(position).ischeck());
holder.getCheckBox().setOnCheckedChangeListener(new CompoundButton.OnCheckedChangeListener() {
@Override
public void onCheckedChanged(CompoundButton buttonView, boolean isChecked) {
//将店铺的checkbox的点击变化事件进行回调
if (mCallBack!=null){
mCallBack.OnCheckListener(isChecked,position);
}
}
});
//实现第二层RecyclerView的回调接口
holder.adapter.setCallBack(new recyclerAdapter1.allCheck() {
@Override
public void OnCheckListener(boolean isChecked, int childpostion) {
//将店铺商品的checkbox的点击变化事件进行回调
if (mCallBack!=null){
mCallBack.OnItemCheckListener(isChecked,position,childpostion);
}
}
});
holder.itemView.setTag(list.get(position));
}
@Override
public int getItemCount() {
return list.size();
}
private allCheck mCallBack;
public void setCallBack(allCheck callBack) {
mCallBack = callBack;
}
public interface allCheck{
//回调函数 将店铺的checkbox的点击变化事件进行回调
public void OnCheckListener(boolean isSelected,int position);
//回调函数 将店铺商品的checkbox的点击变化事件进行回调
public void OnItemCheckListener(boolean isSelected,int parentposition,int chaildposition);
}
} 

第二个Adapter:

public class recyclerAdapter1 extends RecyclerView.Adapter<recyclerAdapter1.MyHolder> {
private List<cbean> cbeanList, cbeanList1;
public recyclerAdapter1(List<cbean> cbeanList) {
this.cbeanList = cbeanList;
cbeanList1 = cbeanList;
}
public static class MyHolder extends RecyclerView.ViewHolder {
private TextView textView;
private CheckBox checkBox; 

public TextView getTextView() {
return textView;
}
public CheckBox getCheckBox() {
return checkBox;
}
public MyHolder(View itemView) {
super(itemView);
textView = (TextView) itemView.findViewById(R.id.checkbox_tv);
checkBox = (CheckBox) itemView.findViewById(R.id.checkbox1);
}
}
@Override
public MyHolder onCreateViewHolder(ViewGroup parent, int viewType) {
View view = LayoutInflater.from(parent.getContext()).inflate(R.layout.check_item, null);
MyHolder holder = new MyHolder(view);
return holder;
}
@Override
public void onBindViewHolder(final MyHolder holder, final int position) {
holder.getTextView().setText(cbeanList.get(position).getText());
holder.getCheckBox().setChecked(cbeanList.get(position).ischeck());
holder.getCheckBox().setOnCheckedChangeListener(new CompoundButton.OnCheckedChangeListener() {
@Override
public void onCheckedChanged(CompoundButton buttonView, boolean isChecked) {
//将商品的checkbox的点击变化事件进行回调给第一个Recyclerview
if (mCallBack != null) {
mCallBack.OnCheckListener(isChecked, position);
}
}
});
holder.itemView.setId(position);
}
@Override
public int getItemCount() {
return cbeanList.size();
}
private allCheck mCallBack;
public void setCallBack(allCheck callBack) {
mCallBack = callBack;
}
public interface allCheck {
//回调函数 将店铺商品的checkbox的点击变化事件进行回调
public void OnCheckListener(boolean isChecked, int childpostion);
}
}

实体类保存数据和选择状态：

public class bean {
private boolean ischeck;
private String text;
private List<cbean> list;
public boolean ischeck() {
return ischeck;
}
public void setIscheck(boolean ischeck) {
this.ischeck = ischeck;
}
public String getText() {
return text;
}
public void setText(String text) {
this.text = text;
}
public List<cbean> getList() {
return list;
}
public void setList(List<cbean> list) {
this.list = list;
}
}
public class cbean {
private boolean ischeck;
private String text;
public boolean ischeck() {
return ischeck;
}
public void setIscheck(boolean ischeck) {
this.ischeck = ischeck;
}
public String getText() {
return text;
}
public void setText(String text) {
this.text = text;
}
}

布局文件：activity_main.xml

<?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:id="@+id/activity_main"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical"
tools:context="com.example.cuboo.myapplication.MainActivity">
<android.support.v7.widget.RecyclerView
android:id="@+id/recyclerview"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_weight="1">
</android.support.v7.widget.RecyclerView>
<LinearLayout
android:layout_width="match_parent"
android:layout_height="wrap_content">
<CheckBox
android:id="@+id/shop_checkbox"
android:layout_marginLeft="12dp"
android:layout_width="24dp"
android:layout_height="24dp"
android:layout_gravity="left|center"
android:padding="12dp"
android:gravity="center" />
</LinearLayout>
</LinearLayout> 

shop_item.xml:

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:orientation="vertical"
android:layout_width="match_parent"
android:layout_height="match_parent">
<LinearLayout
android:layout_width="match_parent"
android:layout_height="wrap_content">
<CheckBox
android:id="@+id/checkbox0"
android:layout_width="24dp"
android:layout_height="24dp" />
<TextView
android:id="@+id/tv_name"
android:text="店名"
android:gravity="center"
android:layout_width="match_parent"
android:layout_height="wrap_content" />
</LinearLayout>
<View
android:layout_width="match_parent"
android:layout_height="0.5dp"
android:background="@color/colorAccent"/>
<android.support.v7.widget.RecyclerView
android:id="@+id/list_items"
android:layout_width="match_parent"
android:layout_height="wrap_content">
</android.support.v7.widget.RecyclerView>
<View
android:layout_width="match_parent"
android:layout_height="48dp"
android:background="@color/colorAccent"/>
</LinearLayout> 

check_item:

<?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="60dp">
<CheckBox
android:layout_gravity="center"
android:id="@+id/checkbox1"
android:layout_width="24dp"
android:layout_height="24dp" />
<TextView
android:id="@+id/checkbox_tv"
android:text="222"
android:layout_weight="1"
android:layout_gravity="center"
android:gravity="center"
android:layout_width="wrap_content"
android:layout_height="wrap_content" />
</LinearLayout> 

简单的效果图：

以上所述是小编给大家介绍的Android中实现淘宝购物车RecyclerView或LIstView的嵌套选择的逻辑，希望对大家有所帮助，如果大家有任何疑问请给我留言，小编会及时回复大家的。在此也非常感谢大家对我们网站的支持！