Android 購物車編輯全選，取消全選 + 計算商品價格

 網上編輯購物車全選，取消全選的例子有不少，我最近正好在作這個功能，而後就整理了好多網上的例子，把好幾我的的思想整理到個人項目中，東西雖然很少，但也費很多勁。。今天終於測試好了。上圖看看效果吧~~

第一張：選擇單個商品

全選。

全不選我就不上圖了

如今開始代碼吧：

第一個佈局文件 activity_act_view.xml

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="match_parent" >
    
   <RelativeLayout
        android:id="@+id/titlerelativelayout"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:background="@drawable/title_background"
        android:gravity="center_vertical" >
             
     <LinearLayout
            android:id="@+id/ShoppingCart_top"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:layout_centerInParent="true"
            android:gravity="center_vertical"
            android:orientation="vertical"
            android:padding="10dp" >
   
      <TextView
          android:id="@+id/ShoppingCart_title_txt"
          android:layout_width="68dp"
          android:layout_height="wrap_content"
          android:gravity="center_vertical"
          android:text="購物車"
          android:textColor="#FF8C00"
          android:textSize="17sp" />
      </LinearLayout>
     <TextView
         android:id="@+id/Cart_toEdit"
         android:layout_width="wrap_content"
         android:layout_height="wrap_content"
         android:layout_alignParentLeft="true"
         android:layout_marginLeft="10dp"
         android:layout_centerVertical="true"
         android:text="編輯"
         android:textColor="#4F4F4F"
         android:textSize="17sp" />
    </RelativeLayout> 
    <com.shop.eshopservice.xListView.XListView
        android:id="@+id/ShoppingCartListView"
        android:layout_width="match_parent"
        android:layout_height="match_parent" 
        android:cacheColorHint="#00000000"
        android:fastScrollEnabled="true"
        android:layout_below="@+id/titlerelativelayout" />
        
    <LinearLayout
            android:id="@+id/linear_cartOrderBottom"
            android:layout_width="match_parent"
            android:layout_height="50dp"
            android:layout_alignParentBottom="true"
            android:layout_alignParentLeft="true"
            android:background="@drawable/bottom_border"
            android:orientation="horizontal" >
             <CheckBox
                android:id="@+id/cb_cart_all"
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:layout_marginLeft="10dp"
                android:text="全選"
                android:textColor="#000000" />
            <TextView
                android:id="@+id/cart_orderallmoney"
                android:layout_width="0dp"
                android:layout_height="wrap_content"
                android:layout_weight="1"
                android:gravity="right"
                android:layout_marginRight="10dp"
                android:text="合計：￥0.00"
                android:textColor="#FF0000"
                android:textSize="13sp" />
            
            <TextView
                android:id="@+id/cart_pro_tobuy"
                 android:layout_width="90dp"
                android:layout_height="50dp"
                android:background="#FF5000"
                android:layout_marginRight="10dp"
                android:gravity="center"
                android:text="結算"
                android:textColor="#ffffff" />
        </LinearLayout>
    
</RelativeLayout>

這裏我用的是自定義的ListView。而後購物車的單個商品詳情  item_shoppingcart.xml

<?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="wrap_content"
    android:background="@drawable/list_background"
    android:orientation="vertical" >

     <LinearLayout
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:gravity="right">
        <TextView
             android:id="@+id/Cart_toEdit"
             android:layout_width="wrap_content"
             android:layout_height="match_parent"
             android:layout_marginRight="10dp"
             android:layout_marginTop="7dp"
             android:gravity="right"
             android:text="編輯"
             android:textColor="#4F4F4F"
             android:textSize="12sp" />
     </LinearLayout>

  <LinearLayout
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:layout_weight="5"
        android:layout_margin="8dp">

     <CheckBox
         android:id="@+id/cb"
         android:layout_width="wrap_content"
         android:layout_height="wrap_content"
         android:focusable="false"
         android:gravity="center"
         android:layout_marginTop="19dp"
         android:focusableInTouchMode="false"
         android:clickable="false"
         android:checkMark="?android:attr/listChoiceIndicatorMultiple"/>

     <ImageView
         android:id="@+id/CartItemImage"
         android:layout_width="260dp"
         android:layout_height="70dp"      
         android:layout_weight="8"
         android:background="@drawable/list_background_imgbg"
         android:padding="0dp"
         android:scaleType="centerInside"
         android:src="@drawable/shop_photo_frame" />

     <LinearLayout
         android:layout_width="match_parent"
         android:layout_height="match_parent"
         android:layout_weight="5"
         android:orientation="vertical"
         android:paddingRight="5dp" >
 
         <RelativeLayout

             android:id="@+id/ItemTopLayout"

             android:layout_width="match_parent"

             android:layout_height="match_parent"
             android:layout_weight="37"
             android:paddingTop="7dp" >

             <RelativeLayout
                 android:layout_width="match_parent"
                 android:layout_height="wrap_content" >

                 <TextView
                     android:id="@+id/cartItemTextView"
                     android:layout_width="wrap_content"
                     android:layout_height="wrap_content"
                     android:layout_alignParentLeft="true"
                     android:ellipsize="end"
                     android:marqueeRepeatLimit="marquee_forever"
                     android:paddingLeft="10dp"
                     android:paddingRight="2dp"
                     android:text="商品標題"
                     android:textColor="#4F4F4F"
                     android:textSize="12sp" />
             </RelativeLayout>
         </RelativeLayout>

         <RelativeLayout
             android:layout_width="match_parent"
             android:layout_height="match_parent"
             android:layout_weight="40"
             android:gravity="bottom"
             android:paddingBottom="9dp"
             android:paddingLeft="10dp" >
             <LinearLayout
                 android:id="@+id/Itembottemleft"
                 android:layout_width="match_parent"
                 android:layout_height="match_parent"
                 android:gravity="center_vertical" >
                 <TextView
                     android:id="@+id/CartItemPrice"
                     android:layout_width="wrap_content"
                     android:layout_height="match_parent"
                     android:layout_marginRight="10dp"
                     android:gravity="bottom"
                     android:text="￥110"
                     android:textColor="#f44415"
                    android:textSize="11sp" />
             </LinearLayout>

            <LinearLayout
                 android:id="@+id/Itembottemright"
                 android:layout_width="wrap_content"
                 android:layout_height="match_parent"
                 android:layout_alignParentRight="true"
                 android:gravity="bottom"
                 android:orientation="horizontal"
                 android:paddingRight="2dp" >
                 <TextView
                     android:id="@+id/CartItemCount"
                     android:layout_width="wrap_content"
                     android:layout_height="match_parent"
                     android:layout_marginRight="8dp"
                     android:gravity="bottom"
                     android:text="X1"
                     android:textColor="#666666"
                     android:textSize="11sp" />
             </LinearLayout>
         </RelativeLayout>
     </LinearLayout>
 </LinearLayout>
</LinearLayout>

而後就是個人購物車代碼了，由於個人主頁面用的是FragmentPagerAdapter+ViewPager,因此每一個類都繼承了Fragment

package com.shop.eshopservice;
import java.text.SimpleDateFormat;
import java.util.ArrayList;
import java.util.Date;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import android.app.Activity;
import android.content.Context;
import android.content.Intent;
import android.os.AsyncTask;
import android.os.Bundle;
import android.support.v4.app.Fragment;
import android.view.LayoutInflater;
import android.view.MotionEvent;
import android.view.View;
import android.view.View.OnClickListener;
import android.view.View.OnTouchListener;
import android.view.ViewGroup;
import android.view.animation.AnimationSet;
import android.widget.AdapterView;
import android.widget.AdapterView.OnItemClickListener;
import android.widget.BaseAdapter;
import android.widget.CheckBox;
import android.widget.CompoundButton;
import android.widget.CompoundButton.OnCheckedChangeListener;
import android.widget.ImageView;
import android.widget.TextView;
import com.shop.eshopservice.Data.Data;
import com.shop.eshopservice.adapter.ShoppingCartAdapter.onCheckedChanged;
import com.shop.eshopservice.model.Model;
import com.shop.eshopservice.model.Product;
import com.shop.eshopservice.model.ShoppingCart;
import com.shop.eshopservice.sqlite.dao.EShopOpenHelper;
import com.shop.eshopservice.tool.ToastUtils;
import com.shop.eshopservice.utils.LoadImg;
import com.shop.eshopservice.utils.LoadPictrue;
import com.shop.eshopservice.xListView.XListView;
import com.shop.eshopservice.xListView.XListView.IXListViewListener;
/**
 * 購物車模塊
 * @author Administrator
 *
 */
public class ActionActivity extends Fragment implements OnTouchListener, IXListViewListener, OnClickListener,onCheckedChanged{
 private View view;
 private List<ShoppingCart> cartList = new ArrayList<ShoppingCart>();
 private ShoppingCartAdapter cartAdapter;
 private EShopOpenHelper eshop;
// private PullToRefreshListView mListView;
 
 private XListView mListView;
 private TextView tv_money,tv_toEdit,to_DelBuy;
 private CheckBox selectAll;
 
 private int pageIndex = 0;
 private int pageSize = 10;
 private int visibleLastIndex = 0;   //最後的可視項索引  
 private int visibleItemCount;       // 當前窗口可見項總數  
 float fist_down_Y = 0;
 private AnimationSet animationSet;
 private boolean[] is_choice;
 private onCheckedChanged listener;
 
 @Override
 public void onAttach(Activity activity) {
  super.onAttach(activity);
 }
 @Override
 public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState){
  view = inflater.inflate(R.layout.activity_act_view, container, false);
  eshop = new EShopOpenHelper(getActivity().getApplicationContext());
//  mListView = (PullToRefreshListView) view.findViewById(R.id.ShoppingCartListView);
  mListView = (XListView)view.findViewById(R.id.ShoppingCartListView);
  tv_toEdit = (TextView)view.findViewById(R.id.Cart_toEdit);  //總編輯按鈕
  to_DelBuy = (TextView)view.findViewById(R.id.cart_pro_tobuy);
  selectAll = (CheckBox)view.findViewById(R.id.cb_cart_all);
  selectAll.setOnClickListener(this);
  is_choice=new boolean[cartList.size()];
//  selectAll.set
  
  tv_money = (TextView)view.findViewById(R.id.cart_orderallmoney);
  
  cartList = eshop.selShoppingCart(pageIndex,pageSize);        //從數據庫獲取購物車的數據
  cartAdapter = new ShoppingCartAdapter(cartList, getActivity().getApplicationContext());
  
//  mListView.setOnScrollListener(this);
  mListView.setOnTouchListener(this);
  mListView.setXListViewListener(this);
  // 設置能夠進行下拉加載的功能
  mListView.setPullLoadEnable(true);
  mListView.setPullRefreshEnable(true);
  
//  tv_money.setText("");
  /*mListView.setOnRefreshListener(new OnRefreshListener() {
   
   @Override
   public void onRefresh() {
    new GetDataTask(getActivity(), 0).execute();
   }
   
   @Override
   public void onLoadMore() {
    new GetDataTask(getActivity(), 1).execute();
   }
  });*/
  selectAll.setOnCheckedChangeListener(new OnCheckedChangeListener() {
   
   public void onCheckedChanged(CompoundButton arg0, boolean arg1) {
    // 記錄列表每一行的選中狀態數量
    int isChoice_all = 0;
    if(arg1){
     Data.Allprice_cart = 0;
     // 設置全選
     for(int i = 0;i < cartAdapter.getCount();i++){
      cartAdapter.selectedMap.put(i, true);
      
      if(cartList.size()!=0){  //購物車裏有商品
       Data.Allprice_cart +=(cartList.get(i).getLocalprice())*cartList.get(i).getProcount();
      }
     }
     tv_money.setText("合計：￥"+Data.Allprice_cart+"");        //這裏的Data.Allprice_cart是我單獨定義的一個放靜態數據的類
    }else {
     // 設置所有取消
     for (int i = 0; i < cartAdapter.getCount(); i++) {
      // 判斷列表每一行是否處於選中狀態，若是處於選中狀態，則計數+1
      if(cartAdapter.selectedMap.get(i)){
       // 計算出列表選中狀態的數量
       isChoice_all += 1; 
      }
     }
     // 判斷列表選中數是否等於列表的總數，若是等於，那麼就須要執行所有取消操做
     if (isChoice_all == cartAdapter.getCount()) {
      // 若是沒有選中了全選，那麼就將列表的每一行都不選
      for (int i = 0; i < cartAdapter.getCount(); i++) {
       // 列表每一行都取消
       cartAdapter.selectedMap.put(i, false);
       if(cartList.size()!=0){  //購物車裏有商品
        Data.Allprice_cart -=(cartList.get(i).getLocalprice())*cartList.get(i).getProcount();
       }
      }
     }
     
     tv_money.setText("合計：￥"+Data.Allprice_cart+"");
     cartAdapter.notifyDataSetChanged();
    }
   }
  });
  mListView.setOnItemClickListener(new OnItemClickListener() {
   
   @Override
   public void onItemClick(AdapterView<?> parent, View view, int position,
     long id) {
    if(id<0){
     return; // 點擊的是headerView或者footerView
    }
    Intent intent = new Intent(getActivity(), GoodsDetailActivity.class);
    Bundle bund = new Bundle();
    ShoppingCart cart = (ShoppingCart) parent.getAdapter().getItem(position);
    bund.putSerializable("CartInfo",cart);
    intent.putExtra("cartvalue",bund);
    intent.putExtra("cart", "cart");
    startActivity(intent);
   }
  });
  cartAdapter.notifyDataSetChanged();
  mListView.setAdapter(cartAdapter);
  return  view;
 }
 /**
  * 滑動時被調用
  */
 /*@Override
 public void onScroll(AbsListView view, int firstVisibleItem, int visibleItemCount, int totalItemCount) {
  this.visibleItemCount = visibleItemCount;
  visibleLastIndex = firstVisibleItem + visibleItemCount -1;
 }
 *//**
  * 當滑動改變時調用
  *//*
 @Override
 public void onScrollStateChanged(AbsListView view, int scrollState) {
  int itemsLastIndex = cartAdapter.getCount() -1; //數據集最後一項的索引
  int lastIndex = itemsLastIndex +1;
  if(scrollState == OnScrollListener.SCROLL_STATE_IDLE && visibleLastIndex == lastIndex){
   //若是是自動加載,能夠在這裏放置異步加載數據的代碼  
   Log.i("LOADMORE", "loading...");  
  }
 }*/
 
 private class GetDataTask extends AsyncTask<Void, Void, List<Product>> {
  private Context context;
  private int index;
  public GetDataTask(Context context, int index) {
   this.context = context;
   this.index = index;
  }
  @Override
  protected List<Product> doInBackground(Void... arg0) {
   return null;
  }
  @Override
  protected void onPostExecute(List<Product> result) {
   if (index == 0) {
    pageIndex = 0;
    cartList = eshop.selShoppingCart(pageIndex,pageSize);   
//    SimpleDateFormat format = new SimpleDateFormat(
//      "yyyy年MM月dd日  HH:mm");
//    String date = format.format(new Date());
//    mListView.onRefreshComplete(date);
   } else if (index == 1) {
    pageIndex += 10;
    cartList = eshop.selShoppingCart(pageIndex,pageSize);  
    if(cartList.size() > 0){
     for (int i = 0; i < cartList.size(); i++) {
      ShoppingCart cart = cartList.get(i);
      cartAdapter.addCartItem(cart);
     }
    }else{
     ToastUtils.ToastMessage(getActivity().getApplicationContext(), "親，已是最後一條數據啦...");
    }
    cartAdapter.notifyDataSetChanged();
//    mListView.onLoadMoreComplete();
   }
   onLoad();
   super.onPostExecute(result);
  }  
 }
 @Override
 public void onRefresh() {
  new GetDataTask(getActivity(), 0).execute();
 }
 @Override
 public void onLoadMore() {
  new GetDataTask(getActivity(), 1).execute();
 }
 @Override
 public boolean onTouch(View arg0, MotionEvent event) {
  float y = event.getY();
  switch (event.getAction()) {
  case MotionEvent.ACTION_DOWN:
   //第一次按下時的座標
   fist_down_Y = y;
   break;
  case MotionEvent.ACTION_MOVE:
   if (fist_down_Y - y > 250) {
    if (animationSet != null) {
     animationSet = null;
    }
//    animationSet = (AnimationSet) AnimationUtils.loadAnimation(this, R.anim.up_out);
   }
   // 向下滑動，顯示搜索欄
   if (y - fist_down_Y > 250) {
    if (animationSet != null) {
     animationSet = null;
    }
//    animationSet = (AnimationSet) AnimationUtils.loadAnimation(this, R.anim.down_in);
   }
   break;
  }
  return false;
 }
 /** 中止加載和刷新 */
 private void onLoad() {
  mListView.stopRefresh();
  // 中止加載更多
  mListView.stopLoadMore();
  // 設置最後一次刷新時間
  mListView.setRefreshTime(getCurrentTime(System.currentTimeMillis()));
 }
 /** 簡單的時間格式 */
 public static SimpleDateFormat mDateFormat = new SimpleDateFormat("MM-dd HH:mm");
 public static String getCurrentTime(long time) {
  if (0 == time) {
   return "";
  }
  return mDateFormat.format(new Date(time));
 }
 @Override
 public void getChoiceData(int position, boolean isChoice) {
  if(isChoice){
   if(cartList.size()!=0){  //購物車裏有商品
    Data.Allprice_cart +=(cartList.get(position).getLocalprice())*cartList.get(position).getProcount();
   }
  }else{
   if(cartList.size()!=0){
    Data.Allprice_cart -=(cartList.get(position).getLocalprice())*cartList.get(position).getProcount();
   }
  }
  // 記錄列表處於選中狀態的數量
  int num_choice = 0;
  for (int i = 0; i < cartAdapter.getCount(); i++) {
   if(cartList !=null &&(cartAdapter.selectedMap.get(i))){
    num_choice ++;
   }
  }
  
  if(num_choice == cartList.size()){
   selectAll.setChecked(true);
  } else {
   selectAll.setChecked(false);
  }
  tv_money.setText("合計：￥"+Data.Allprice_cart+"");
 }
 
 
 @Override
 public void onClick(View v) {
  switch (v.getId()) {
  case R.id.Cart_toEdit:
   tv_toEdit.setText("完成");
   to_DelBuy.setText("刪除");
   break;
  case R.id.cb_cart_all:
//   if(selectAll.isChecked()){
//    for(int i =0;i< cartAdapter.getCount();i++){
//     cartAdapter.selectedMap.put(i, true);
////     cartAdapter.delContactsIdSet.add(String.valueOf(cartAdapter.list.get(i).getId()));
//    }
//    
//   }else{
//    for (int i = 0; i < cartAdapter.getCount(); i++) {
//     cartAdapter.selectedMap.put(i, false);
////     cartAdapter.delContactsIdSet.clear();
//    }
//   }
   cartAdapter.notifyDataSetChanged();
   break;
  }
 }
 class ShoppingCartAdapter extends BaseAdapter {
  //保存listview item的狀態
  HashMap<Integer,View> map = new HashMap<Integer,View>(); 
  List<ShoppingCart> list;
  // 用來控制CheckBox的選中情況  
  Map<Integer, Boolean> selectedMap;
//     HashSet<String> delContactsIdSet;
  Context ctx;
  private LoadImg loadImg;
  private double allMoney = 0.0;
  public ShoppingCartAdapter(List<ShoppingCart> list, Context ctx) {
   this.list = list;
   this.ctx = ctx;
//   delContactsIdSet = new HashSet<String>();
   selectedMap = new HashMap<Integer, Boolean>();
   initDate();
  }
   // 初始化isSelected的數據  
     private void initDate() {  
         for (int i = 0; i < list.size(); i++) {  
             selectedMap.put(i,false);
         }  
     }
  public void setList(List<ShoppingCart> proList){
   this.list = proList;
  }
  @Override
  public int getCount() {
   return list.size();
  }
  @Override
  public Object getItem(int arg0) {
   return list.get(arg0);
  }
  @Override
  public long getItemId(int arg0) {
   return arg0;
  }
  
  public void addCartItem(ShoppingCart cart){
   list.add(cart);
  }
  
  @Override
  public View getView(final int position, View convertView, ViewGroup parent) {
   Holder hold = null;
   View view = null;
   if(map.get(position) == null){
    // 得到ViewHolder對象  
             // 導入佈局並賦值給convertview  
             LayoutInflater mInflater = (LayoutInflater) ctx.getSystemService(Context.LAYOUT_INFLATER_SERVICE);  
             view = mInflater.inflate(R.layout.item_shoppingcart, null);  
             hold = new Holder();
             hold.toEdit = (TextView)view.findViewById(R.id.Cart_toEdit);
             hold.mTitle = (TextView) view.findViewById(R.id.cartItemTextView); //產品標題
    hold.mImage = (ImageView) view.findViewById(R.id.CartItemImage);  //產品圖片
    hold.mPrice = (TextView) view.findViewById(R.id.CartItemPrice);  //產品價格
    hold.mCount = (TextView) view.findViewById(R.id.CartItemCount);
    hold.check_goods = (CheckBox)view.findViewById(R.id.cb);
    final int p = position;
    hold.check_goods.setChecked(selectedMap.get(position));
    hold.check_goods.setOnClickListener(new OnClickListener() {
     
     @Override
     public void onClick(View vi) {
      //selectedMap.put(p, true);
     }
    });
    hold.check_goods.setOnCheckedChangeListener(new OnCheckedChangeListener() {
     
     @Override
     public void onCheckedChanged(CompoundButton arg0, boolean isChoice) {
      if(isChoice){
       selectedMap.put(p, true);
      }else{
       selectedMap.put(p, false);
      }
      getChoiceData(position, isChoice);        //當每次選中發生變化時調用它進行判斷
     }
    });
    view.setTag(hold);
   }else{
    //取出hold
    view = map.get(position);
    hold = (Holder)view.getTag();
   }
   hold.mTitle.setText(ToDBC(list.get(position).getTitle()));
   hold.mImage.setTag(Model.SHOPLISTIMGURL + list.get(position).getImageUrl());
   hold.mPrice.setText("￥"+list.get(position).getLocalprice() + "");
   hold.mCount.setText("X"+list.get(position).getProcount());
   // 設置默認顯示的圖片
   hold.mImage.setImageResource(R.drawable.shop_photo_frame);
   LoadPictrue.loadImage4(hold.mImage.getTag().toString() ,hold.mImage);  //緩存加載圖片
   return view;
  }
  //規定佈局頁面標題換行代碼
  public String ToDBC(String input) {  
      char[] c = input.toCharArray();  
      for (int i = 0; i< c.length; i++) {  
          if (c[i] == 12288) {  
            c[i] = (char) 32;  
            continue;  
          }if (c[i]> 65280&& c[i]< 65375)  
             c[i] = (char) (c[i] - 65248);  
          }  
      return new String(c);  
  } 
  class Holder {
   public TextView mTitle, mPrice, mCount,toEdit;
   public ImageView mImage;
   public CheckBox check_goods;
  }
 }
}

我去，代碼居然這麼長，看起來可能有點費勁，但功能實現就好。