android_購物車增刪改查,結算,全選全不選
阿新 • • 發佈：2019-02-05
第一步:匯入Eventbus依賴
compile 'org.greenrobot:eventbus:3.1.1'第二步:佈局
Main_Activity:
<?xml version="1.0" encoding="utf-8"?> <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" xmlns:app="http://schemas.android.com/apk/res-auto" xmlns:tools="http://schemas.android.com/tools" android:layout_width="match_parent" android:layout_height="match_parent" android:orientation="vertical" tools:context="com.bwei.www.yuekaomoni.Main2Activity"> <ExpandableListView android:id="@+id/elv" android:layout_width="match_parent" android:layout_height="match_parent" android:layout_weight="1" /> <RelativeLayout android:layout_width="match_parent" android:layout_height="50dp" android:layout_alignParentBottom="true" android:background="@android:color/white" android:gravity="center_vertical"> <CheckBox android:id="@+id/checkbox2" android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_centerVertical="true" android:layout_marginLeft="10dp" android:focusable="false" /> <TextView android:layout_width="wrap_content" android:layout_height="50dp" android:layout_centerVertical="true" android:layout_marginLeft="10dp" android:layout_toRightOf="@+id/checkbox2" android:gravity="center_vertical" android:text="全選" android:textSize="20sp" /> <LinearLayout android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_marginLeft="100dp" android:orientation="horizontal"> <TextView android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_marginLeft="10dp" android:text="合計 ：" /> <TextView android:id="@+id/tv_price" android:layout_width="wrap_content" android:layout_height="50dp" android:layout_marginLeft="10dp" android:paddingRight="10dp" android:text="0" android:textColor="@android:color/holo_red_light" /> <TextView android:layout_marginLeft="150dp" android:id="@+id/tv_num" android:layout_width="150dp" android:layout_height="50dp" android:background="@android:color/holo_red_dark" android:gravity="center" android:padding="10dp" android:text="結算(0)" android:textColor="@android:color/white" /> </LinearLayout> </RelativeLayout> </LinearLayout>
gwc_item:
<?xml version="1.0" encoding="utf-8"?> <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" android:layout_width="match_parent" android:layout_height="match_parent" android:gravity="center_vertical" android:orientation="horizontal"> <CheckBox android:id="@+id/cb_child" android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_marginBottom="30dp" android:layout_marginLeft="10dp" android:layout_marginTop="30dp" android:focusable="false" /> <RelativeLayout android:layout_width="100dp" android:layout_height="100dp" > <TextView android:id="@+id/tv_sbt" android:layout_width="wrap_content" android:layout_height="wrap_content" android:singleLine="true" android:ellipsize="end" android:text="三隻松鼠大禮包發動機"/> <ImageView android:layout_below="@id/tv_sbt" android:layout_width="80dp" android:layout_height="80dp" android:id="@+id/img" android:src="@mipmap/ic_launcher"/> </RelativeLayout> <LinearLayout android:layout_width="match_parent" android:layout_height="wrap_content" android:layout_weight="3" android:orientation="vertical"> <TextView android:id="@+id/tv_pri" android:layout_width="wrap_content" android:layout_height="wrap_content" android:text="¥3000.00" /> <TextView android:id="@+id/tv_content" android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_marginLeft="20dp" android:text="什麼" /> <LinearLayout android:layout_width="match_parent" android:layout_height="wrap_content" android:gravity="center_vertical"> <com.bwei.www.yuekaomoni.myView.MyView android:id="@+id/mv" android:layout_width="wrap_content" android:layout_height="wrap_content"></com.bwei.www.yuekaomoni.myView.MyView> </LinearLayout> </LinearLayout> <Button android:id="@+id/tv_del" android:layout_width="20dp" android:layout_height="20dp" android:background="@drawable/rublish" /> </LinearLayout>
gw_item2
<?xml version="1.0" encoding="utf-8"?> <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" android:layout_width="match_parent" android:layout_height="10dp" android:gravity="center_vertical" android:orientation="horizontal"> <CheckBox android:id="@+id/cb_parent" android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_marginBottom="5dp" android:layout_marginLeft="10dp" android:layout_marginTop="5dp" android:focusable="false" /> <TextView android:id="@+id/tv_sign" android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_marginLeft="20dp" android:text="標記" /> <TextView android:id="@+id/tv_number" android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_marginLeft="20dp" android:text="12345678" /> </LinearLayout>
加減器:myview:
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="horizontal">
<Button
android:id="@+id/btn_add"
android:layout_width="20dp"
android:layout_height="20dp"
android:background="@drawable/shopcart_add_red"/>
<EditText
android:id="@+id/et_et"
android:layout_width="50dp"
android:layout_height="wrap_content"
android:text="1"
android:textSize="20dp"/>
<Button
android:id="@+id/btn_del"
android:layout_width="20dp"
android:layout_height="20dp"
android:background="@drawable/shopcart_minus_red"/>
</LinearLayout>
第三步:
StarExpanderAdapter:
package com.bwei.www.yuekaomoni.adapter;
import android.content.Context;
import android.view.View;
import android.view.ViewGroup;
import android.widget.BaseExpandableListAdapter;
import android.widget.CheckBox;
import android.widget.EditText;
import android.widget.ImageView;
import android.widget.TextView;
import com.bumptech.glide.Glide;
import com.bwei.www.yuekaomoni.R;
import com.bwei.www.yuekaomoni.bean.GsonBean;
import com.bwei.www.yuekaomoni.check.MessageEvent;
import com.bwei.www.yuekaomoni.eventbusevent.PriceAndCountEvent;
import com.bwei.www.yuekaomoni.myView.MyView;
import org.greenrobot.eventbus.EventBus;
import java.util.ArrayList;
import java.util.List;
import static com.bwei.www.yuekaomoni.R.id.img;
import static com.bwei.www.yuekaomoni.R.id.mv;
import static com.bwei.www.yuekaomoni.R.id.tv_content;
import static com.bwei.www.yuekaomoni.R.id.tv_pri;
/**
* @作者
* @時間 2017/11/18 11:17
*/
public class StarExpanderAdapter extends BaseExpandableListAdapter {
Context context;
List<GsonBean.DataBean> dataBeen;
ArrayList<List<GsonBean.DataBean.ListBean>> listBean;
public StarExpanderAdapter(Context context, List<GsonBean.DataBean> dataBeen, ArrayList<List<GsonBean.DataBean.ListBean>> 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;
}
//一級列表佈局
@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());
//一級列表checkBox的點選事件
holder.cbgroup.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
//判斷一級列表複選框的狀態 設定為true或false
groupBean.setGropuCb(holder.cbgroup.isChecked());
//改變二級checkbod的狀態
changeChildeCbState(i,holder.cbgroup.isChecked());
//算錢
EventBus.getDefault().post(compute());
//改變全選狀態 isAllGroupCbSelect判斷一級是否全部選中
changeAllCbState(isAllGroupCbSelected());
//必重新整理
notifyDataSetChanged();
}
});
return view;
}
//二級列表佈局
@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()+"");
//加號
childViewHolder.mv.setOnAddDelClickLstener(new MyView.OnAddDelClickLstener() {
@Override
public void onAddClick(View v) {
int num = clildBean.getNum();
//num為int型別所以要加空字串
childViewHolder.et_et.setText(++num+"");
clildBean.setNum(num);
//如果二級列表的checkbox為選中,計算價錢
if (childViewHolder.cbChild.isChecked()){
PriceAndCountEvent priceAndCountEvent = compute();
EventBus.getDefault().post(priceAndCountEvent);
}
}
//減號
@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);
}
}
});
//刪除
childViewHolder.tv_del.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
List<GsonBean.DataBean.ListBean> listBeen = listBean.get(i);
GsonBean.DataBean.ListBean remove = listBeen.remove(i1);
if(listBeen.size()==0){
//先移除二級列表的集合,再移除一級列表的集合
listBean.remove(i);
dataBeen.remove(i);
}
//算錢
EventBus.getDefault().post(compute());
notifyDataSetChanged();
}
});
//二級列表的點選事件
childViewHolder.cbChild.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
//設定該條目物件裡的checked屬性值
clildBean.setChildCb(childViewHolder.cbChild.isChecked());
//計算價錢
PriceAndCountEvent priceAndCountEvent = compute();
EventBus.getDefault().post(priceAndCountEvent);
//判斷當前checkbox是選中的狀態
if(childViewHolder.cbChild.isChecked()){
//如果全部選中(isAllChildCbSelected)
if(isAllChildCbSelected(i)){
//改變一級列表的狀態
changGroupCbState(i,true);
//改變全選的狀態
changeAllCbState(isAllGroupCbSelected());
}
}else {
//如果沒有全部選中,一級列表的checkbox為false不為選中
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;
}
/**
* 改變二級列表checkbox狀態
* 如果一級選中,控制二級也選中
* @param i
* @param flag
*/
private void changeChildeCbState(int i,boolean flag){
List<GsonBean.DataBean.ListBean> listBeen = listBean.get(i);
for (int j = 0; j <listBeen.size(); j++) {
GsonBean.DataBean.ListBean listBean = listBeen.get(j);
listBean.setChildCb(flag);
}
}
/**
* 判斷一級列表是否全選中
* @return
*/
private boolean isAllGroupCbSelected(){
for (int i = 0; i <dataBeen.size() ; i++) {
GsonBean.DataBean dataBean = dataBeen.get(i);
if(!dataBean.isGropuCb()){
return false;
}
}
return true;
}
/**
* 改變全選的狀態
*
* @param flag
*/
private void changeAllCbState(boolean flag){
MessageEvent messageEvent = new MessageEvent();
messageEvent.setChecked(flag);
EventBus.getDefault().post(messageEvent);
}
/**
* 判斷二級列表是否全部選中
* @param i
* @return
*/
private boolean isAllChildCbSelected (int i){
List<GsonBean.DataBean.ListBean> listBeen = listBean.get(i);
for (int j = 0; j <listBeen.size() ; j++) {
GsonBean.DataBean.ListBean listBean = listBeen.get(j);
if(!listBean.isChildCb()){
return false;
}
}
return true;
}
/**
* 改變一級列表checkbox狀態
*
* @param i
*/
private void changGroupCbState(int i,boolean flag){
GsonBean.DataBean dataBean = dataBeen.get(i);
dataBean.setGropuCb(flag);
}
/**
* 改變二級列表checkbox狀態
* @param i
* @param flag
*/
private void changeChildCbState(int i,boolean flag){
List<GsonBean.DataBean.ListBean> listBeen = listBean.get(i);
for (int j = 0; j <listBeen.size() ; j++) {
GsonBean.DataBean.ListBean listBean = listBeen.get(j);
listBean.setChildCb(flag);
}
}
/**
* 計算列表中，選中的錢和數量
*/
private PriceAndCountEvent compute(){
int count = 0;
int price = 0;
for (int i = 0; i <listBean.size() ; i++) {
List<GsonBean.DataBean.ListBean> listBeen = listBean.get(i);
for (int j = 0; j <listBeen.size() ; j++) {
GsonBean.DataBean.ListBean listBean = listBeen.get(j);
if(listBean.isChildCb()){
price+=listBean.getNum()*listBean.getPrice();
count+=listBean.getNum();
}
}
}
PriceAndCountEvent priceAndCountEvent = new PriceAndCountEvent();
priceAndCountEvent.setCount(count);
priceAndCountEvent.setPrice(price);
return priceAndCountEvent;
}
/**
* 設定全選、反選
*
* @param flag
*/
public void changeAllListCbState(boolean flag) {
for (int i = 0; i < dataBeen.size(); i++) {
changGroupCbState(i, flag);
changeChildCbState(i, flag);
}
//算錢
EventBus.getDefault().post(compute());
notifyDataSetChanged();
}
}
第四:
MessageEvent:
package com.bwei.www.yuekaomoni.eventbusevent;
/**
* @作者
* @時間 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:package com.bwei.www.yuekaomoni.eventbusevent; /** * @作者 任百慧 * @時間 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:介面:
public interface IView {
void Success (String tag, List<GsonBean.DataBean> 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<GsonBean.DataBean> dataBeen = new ArrayList<>(); private CheckBox checkquan; private List<GsonBean.DataBean.ListBean> lists; ArrayList<List<GsonBean.DataBean.ListBean>> 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); //註冊一下 EventBus.getDefault().register(this); //獲取控制元件 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); //獲取資料 presentCar = new PresentCar(); presentCar.attachView(this); presentCar.getNews(); checkquan.setOnClickListener(new View.OnClickListener() { @Override public void onClick(View view) { //設定全選 adapter.changeAllListCbState(checkquan.isChecked()); } }); } //銷燬方法 @Override protected void onDestroy() { super.onDestroy(); //eventBus銷燬 EventBus.getDefault().unregister(this); if (presentCar!=null){ presentCar.detachView(); } } @Override public void Success(String tag, List<GsonBean.DataBean> 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); //隱藏二級列表前小三角 elv.setGroupIndicator(null); //使二級列表一直展示 for (int i = 0; i <dataBeen.size() ; i++) { elv.expandGroup(i); } } @Override public void Failed(String tag, Exception e) { } //必寫註解 @Subscribe public void onMessageEvent(MessageEvent event) { checkquan.setChecked(event.isChecked()); } @Subscribe public void onMessageEvent(PriceAndCountEvent event) { tv_num.setText("結算(" + event.getCount() + ")"); tv_price.setText(event.getPrice() + ""); } }
還有一個 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 * @時間 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; //定義一個對外開放的介面 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","點選了減號"); lister.onDelClick(view); } }); btn_add.setOnClickListener(new OnClickListener() { @Override public void onClick(View view) { Log.e("txtAdd","點選了加號"); lister.onAddClick(view); } }); } } 