android_购物车增删改查,结算,全选全不选
第一步:导入Eventbus依赖
compile 'org.greenrobot:eventbus:3.1.1'
第二步:布局
Main_Activity:
gwc_item:
gw_item2
加减器:myview:
第三步:
StarExpanderAdapter:
/**
* @作者
* @时间 2017/11/18 11:17
*/
public class StarExpanderAdapter extends BaseExpandableListAdapter {
Context context;
List dataBeen;
ArrayList> listBean;
public StarExpanderAdapter(Context context, List dataBeen, ArrayList> listBean) {
this.context = context;
this.dataBeen = dataBeen;
this.listBean = listBean;
}
@Override
public int getGroupCount() {
return dataBeen.size();
}
@Override
public int getChildrenCount(int i) {
return listBean.get(i).size();
}
@Override
public Object getGroup(int i) {
return dataBeen.get(i);
}
@Override
public Object getChild(int i, int i1) {
return listBean.get(i).get(i1);
}
@Override
public long getGroupId(int i) {
return i;
}
@Override
public long getChildId(int i, int i1) {
return i1;
}
@Override
public boolean hasStableIds() {
return false;
}
//一级列表布局
@Override
public View getGroupView(final int i, boolean b, View view, ViewGroup viewGroup) {
final GsonBean.DataBean groupBean = dataBeen.get(i);
final GroupViewHolder holder;
if(view==null){
holder = new GroupViewHolder();
view = View.inflate(context, R.layout.gw_item2, null);
holder.tv_sbt = view.findViewById(R.id.tv_sign);
holder.cbgroup = view.findViewById(R.id.cb_parent);
view.setTag(holder);
}else
{
holder = (GroupViewHolder) view.getTag();
}
holder.cbgroup.setChecked(groupBean.isGropuCb());
holder.tv_sbt.setText(groupBean.getSellerName());
//一级列表checkBox的点击事件
holder.cbgroup.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
//判断一级列表复选框的状态 设置为true或false
groupBean.setGropuCb(holder.cbgroup.isChecked());
//改变二级checkbod的状态
changeChildeCbState(i,holder.cbgroup.isChecked());
//算钱
EventBus.getDefault().post(compute());
//改变全选状态 isAllGroupCbSelect判断一级是否全部选中
changeAllCbState(isAllGroupCbSelected());
//必刷新
notifyDataSetChanged();
}
});
return view;
}
//二级列表布局
@Override
public View getChildView(final int i, final int i1, boolean b, View view, ViewGroup viewGroup) {
final GsonBean.DataBean.ListBean clildBean = this.listBean.get(i).get(i1);
final ChildViewHolder childViewHolder;
if(view==null){
view = View.inflate(context, R.layout.gwc_item, null);
childViewHolder = new ChildViewHolder();
childViewHolder.tv_sbt = (TextView) view.findViewById(R.id.tv_sbt);
childViewHolder.img = (ImageView) view.findViewById(img);
childViewHolder.tv_pri = (TextView) view.findViewById(tv_pri);
childViewHolder.tv_content = (TextView) view.findViewById(tv_content);
childViewHolder.cbChild =view.findViewById(R.id.cb_child);
childViewHolder.mv = view.findViewById(mv);
childViewHolder.tv_del = view.findViewById(R.id.tv_del);
childViewHolder.et_et = (EditText) childViewHolder.mv.findViewById(R.id.et_et);
view.setTag(childViewHolder);
}else{
childViewHolder = (ChildViewHolder) view.getTag();
}
childViewHolder.tv_sbt.setText(clildBean.getTitle());
String images = clildBean.getImages();
String[] split = images.split("\\|");
Glide.with(context).load(split[0]).into(childViewHolder.img);
childViewHolder.tv_pri.setText(clildBean.getPrice()+"");
childViewHolder.tv_content.setText(clildBean.getSubhead());
childViewHolder.cbChild.setChecked(clildBean.isChildCb());
childViewHolder.et_et.setText(clildBean.getNum()+"");
//加号
childViewHolder.mv.setOnAddDelClickLstener(new MyView.OnAddDelClickLstener() {
@Override
public void onAddClick(View v) {
int num = clildBean.getNum();
//num为int类型所以要加空字符串
childViewHolder.et_et.setText(++num+"");
clildBean.setNum(num);
//如果二级列表的checkbox为选中,计算价钱
if (childViewHolder.cbChild.isChecked()){
PriceAndCountEvent priceAndCountEvent = compute();
EventBus.getDefault().post(priceAndCountEvent);
}
}
//减号
@Override
public void onDelClick(View v) {
int num = clildBean.getNum();
if(num==1){
return;
}
childViewHolder.et_et.setText(--num+"");
clildBean.setNum(num);
if(childViewHolder.cbChild.isChecked()){
PriceAndCountEvent priceAndCountEvent = compute();
EventBus.getDefault().post(priceAndCountEvent);
}
}
});
//删除
childViewHolder.tv_del.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
List listBeen = listBean.get(i);
GsonBean.DataBean.ListBean remove = listBeen.remove(i1);
if(listBeen.size()==0){
//先移除二级列表的集合,再移除一级列表的集合
listBean.remove(i);
dataBeen.remove(i);
}
//算钱
EventBus.getDefault().post(compute());
notifyDataSetChanged();
}
});
//二级列表的点击事件
childViewHolder.cbChild.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
//设置该条目对象里的checked属性值
clildBean.setChildCb(childViewHolder.cbChild.isChecked());
//计算价钱
PriceAndCountEvent priceAndCountEvent = compute();
EventBus.getDefault().post(priceAndCountEvent);
//判断当前checkbox是选中的状态
if(childViewHolder.cbChild.isChecked()){
//如果全部选中(isAllChildCbSelected)
if(isAllChildCbSelected(i)){
//改变一级列表的状态
changGroupCbState(i,true);
//改变全选的状态
changeAllCbState(isAllGroupCbSelected());
}
}else {
//如果没有全部选中,一级列表的checkbox为false不为选中
changGroupCbState(i,false);
changeAllCbState(isAllGroupCbSelected());
}
notifyDataSetChanged();
}
});
return view;
}
@Override
public boolean isChildSelectable(int i, int i1) {
return true;
}
class GroupViewHolder {
CheckBox cbgroup;
TextView tv_sbt;
}
class ChildViewHolder {
TextView tv_sbt;
ImageView img;
TextView tv_pri;
TextView tv_content;
CheckBox cbChild;
MyView mv;
TextView tv_del;
EditText et_et;
}
/**
* 改变二级列表checkbox状态
* 如果一级选中,控制二级也选中
* @param i
* @param flag
*/
private void changeChildeCbState(int i,boolean flag){
List listBeen = listBean.get(i);
for (int j = 0; j listBeen = listBean.get(i);
for (int j = 0; j listBeen = listBean.get(i);
for (int j = 0; j listBeen = listBean.get(i);
for (int j = 0; j 第四:
MessageEvent:
/**
* @作者
* @时间 2017/11/20 19:32
*/
public class MessageEvent {
private boolean checked;
public boolean isChecked() {
return checked;
}
public void setChecked(boolean checked) {
this.checked = checked;
}
}
PriceAndCountEvent: /** * @作者 @时间 2017/11/20 19:33 */ public class PriceAndCountEvent { private int price; private int count; public int getPrice() { return price; } public void setPrice(int price) { this.price = price; } public int getCount() { return count; } public void setCount(int count) { this.count = count; } } 四:接口:
public interface IView {
void Success (String tag, List list);
void Failed(String tag,Exception e);
}
第五:MainActivity:
package com.bwei.www.yuekaomoni; import android.os.Bundle; import android.support.v7.app.AppCompatActivity; import android.view.View; import android.widget.CheckBox; import android.widget.ExpandableListView; import android.widget.TextView; import com.bwei.www.yuekaomoni.Callback.IView; import com.bwei.www.yuekaomoni.adapter.StarExpanderAdapter; import com.bwei.www.yuekaomoni.bean.GsonBean; import com.bwei.www.yuekaomoni.eventbusevent.MessageEvent; import com.bwei.www.yuekaomoni.eventbusevent.PriceAndCountEvent; import com.bwei.www.yuekaomoni.present.PresentCar; import org.greenrobot.eventbus.EventBus; import org.greenrobot.eventbus.Subscribe; import java.util.ArrayList; import java.util.List; public class Main2Activity extends AppCompatActivity implements IView { private ExpandableListView elv; ArrayList dataBeen = new ArrayList<>(); private CheckBox checkquan; private List lists; ArrayList> listBean = new ArrayList<>(); private StarExpanderAdapter adapter; private TextView tv_price; private TextView tv_num; private PresentCar presentCar; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_main2); //注册一下 EventBus.getDefault().register(this); //获取控件 elv = (ExpandableListView) findViewById(R.id.elv); checkquan = (CheckBox) findViewById(R.id.checkbox2); tv_price = (TextView) findViewById(R.id.tv_price); tv_num = (TextView) findViewById(R.id.tv_num); //获取数据 presentCar = new PresentCar(); presentCar.attachView(this); presentCar.getNews(); checkquan.setOnClickListener(new View.OnClickListener() { @Override public void onClick(View view) { //设置全选 adapter.changeAllListCbState(checkquan.isChecked()); } }); } //销毁方法 @Override protected void onDestroy() { super.onDestroy(); //eventBus销毁 EventBus.getDefault().unregister(this); if (presentCar!=null){ presentCar.detachView(); } } @Override public void Success(String tag, List list) { dataBeen.addAll(list); for (int i = 0; i < dataBeen.size(); i++) { GsonBean.DataBean bean = dataBeen.get(i); lists = bean.getList(); listBean.add(lists); } adapter = new StarExpanderAdapter(Main2Activity.this,dataBeen,listBean); elv.setAdapter(adapter); //隐藏二级列表前小三角 elv.setGroupIndicator(null); //使二级列表一直展示 for (int i = 0; i
还有一个 MyView:
package com.bwei.www.yuekaomoni.myView; import android.content.Context; import android.support.annotation.Nullable; import android.util.AttributeSet; import android.util.Log; import android.view.View; import android.widget.Button; import android.widget.EditText; import android.widget.LinearLayout; import com.bwei.www.yuekaomoni.R; /** * @作者 任百慧 * @时间 2017/11/18 09:56 */ public class MyView extends LinearLayout{ private OnAddDelClickLstener lister; private Button btn_add; private Button txtAdd; private EditText et_et; private Button btn_del; //定义一个对外开放的接口 public interface OnAddDelClickLstener{ void onAddClick(View v); void onDelClick(View v); } public void setOnAddDelClickLstener(OnAddDelClickLstener lister){ if(lister!=null){ this.lister = lister; } } public MyView(Context context) { this(context,null); } public MyView(Context context, @Nullable AttributeSet attrs) { this(context, attrs,0); } public MyView(Context context, @Nullable AttributeSet attrs, int defStyleAttr) { super(context, attrs, defStyleAttr); initView(context, attrs, defStyleAttr); } private void initView(Context context, AttributeSet attrs, int defStyleAttr) { View.inflate(context, R.layout.myview,this); btn_add = (Button) findViewById(R.id.btn_add); btn_del = (Button) findViewById(R.id.btn_del); et_et = (EditText) findViewById(R.id.et_et); btn_del.setOnClickListener(new OnClickListener() { @Override public void onClick(View view) { Log.e("AddDeleteView","点击了减号"); lister.onDelClick(view); } }); btn_add.setOnClickListener(new OnClickListener() { @Override public void onClick(View view) { Log.e("txtAdd","点击了加号"); lister.onAddClick(view); } }); } }
