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