Android實現購物車功能

最近看了一些淘寶購物車的demo，於是也寫了一個。

效果圖如下：

主要代碼如下：
actvity中的代碼：

public class ShoppingCartActivity extends BaseActivity {

  private List<Test> data;
  private ListView mListView;
  private ShoppingCartAdapter adapter;

  private RelativeLayout rlRefresh;
  private TextView tvRefresh;
  private ProgressBar barRefresh;
  private LinearLayout clear;
  private CheckBox checkBox_select_all;
  private CheckBox checkBox_add;
  private TextView integral_sum;
  private int sum = 0;
  private int[] sumIntegral;
  private Context context;

  @Override
  protected void onCreate(Bundle bundle) {
    // TODO Auto-generated method stub
    super.onCreate(bundle);
    setContentView(R.layout.activity_shopping_cart);
    initView();
  }

  private void initView() {
    context = this;
    showpage = 1;
    isPermitFlag = true;
    data = new ArrayList<Test>();
    // 測試數據
    data.add(new Test("id", "color", "type", "100"));
    data.add(new Test("id", "color", "type", "200"));
    data.add(new Test("id", "color", "type", "300"));
    data.add(new Test("id", "color", "type", "0"));
    data.add(new Test("id", "color", "type", "300"));
    data.add(new Test("id", "color", "type", "100"));
    data.add(new Test("id", "color", "type", "500"));
    data.add(new Test("id", "color", "type", "0"));
    data.add(new Test("id", "color", "type", "900"));

    adapter = new ShoppingCartAdapter(context, handler, data);

    sumIntegral = new int[data.size() + 1];

    checkBox_add = (CheckBox) findViewById(R.id.checkbox_add);
    integral_sum = (TextView) findViewById(R.id.integral_sum);
    clear = (LinearLayout) findViewById(R.id.clear);
    clear.setOnClickListener(new OnClickListener() {

      @Override
      public void onClick(View v) {
        data.clear();
        adapter.notifyDataSetChanged();
        integral_sum.setText(0 + "");
        checkBox_select_all.setChecked(false);
        checkBox_add.setClickable(false);
      }
    });
    checkBox_select_all = (CheckBox) findViewById(R.id.checkbox_select);
    checkBox_select_all.setOnClickListener(new OnClickListener() {

      @Override
      public void onClick(View v) {

        HashMap<Integer, Boolean> isSelected = ShoppingCartAdapter
            .getIsSelected();
        Iterator iterator = isSelected.entrySet().iterator();
        List<Boolean> array = new ArrayList<Boolean>();//列表中checkbox選中狀態
        List<Integer> nums = new ArrayList<Integer>();//列表中商品數量
        while (iterator.hasNext()) {
          HashMap.Entry entry = (HashMap.Entry) iterator.next();
          Integer key = (Integer) entry.getKey();
          Boolean val = (Boolean) entry.getValue();
          array.add(val);
        }
        for (int i = 0; i < data.size(); i++) {
          int num = data.get(i).getNum();
          int integral = Integer.valueOf(data.get(i).getIntegral());
          nums.add(num);
        }
        if (checkBox_select_all.isChecked()) {

          for (int i = 0; i < data.size(); i++) {
            ShoppingCartAdapter.getIsSelected().put(i, true);
          }
          checkBox_add.setChecked(true);
          adapter.notifyDataSetChanged();
        } else {
          for (int i = 0; i < data.size(); i++) {
            ShoppingCartAdapter.getIsSelected().put(i, false);
          }
          checkBox_add.setChecked(false);
          adapter.notifyDataSetChanged();
          integral_sum.setText(0 + "");
        }

      }
    });
    mListView= (ListView) findViewById(R.id.finance_list);
    mListView.setAdapter(adapter);
    mListView.setOnItemClickListener(new OnItemClickListener() {

      @Override
      public void onItemClick(AdapterView<?> parent, View view,
          int position, long id) {
        Toast.makeText(context, position + "", Toast.LENGTH_LONG)
            .show();

        int pos = position - 1;
        ViewHolder viewHolder = (ViewHolder) view.getTag();
        int num = data.get(pos).getNum();
        if (num == 0) {
          Toast.makeText(context, "請選擇商品數量", Toast.LENGTH_LONG)
              .show();
        } else {
          boolean cu = !ShoppingCartAdapter.getIsSelected().get(pos);
          ShoppingCartAdapter.getIsSelected().put(pos, cu);
          adapter.notifyDataSetChanged();
          //遍歷獲取列表中checkbox的選中狀態
          HashMap<Integer, Boolean> isSelected = ShoppingCartAdapter
              .getIsSelected();
          Iterator iterator = isSelected.entrySet().iterator();
          List<Boolean> array = new ArrayList<Boolean>();
          while (iterator.hasNext()) {
            HashMap.Entry entry = (HashMap.Entry) iterator.next();
            Integer key = (Integer) entry.getKey();
            Boolean val = (Boolean) entry.getValue();
            array.add(val);
          }
          if (Test.isAllFalse(array)) {
            checkBox_select_all.setChecked(false);
            checkBox_add.setChecked(false);
          }
          if (Test.isAllTrue(array)) {
            checkBox_select_all.setChecked(true);
            checkBox_add.setChecked(true);
          }
          if (Test.isHaveOneFasle(array)) {
            checkBox_select_all.setChecked(false);
          }
          if (Test.isHaveOneTrue(array)) {
            checkBox_add.setChecked(true);
          }
        }
      }
    });
  }

  @SuppressLint("HandlerLeak")
  private Handler handler = new Handler(){
    @SuppressWarnings("unchecked")
    @Override
    public void handleMessage(Message msg) {
      super.handleMessage(msg);
      if(msg.what == 10){ //更改選中商品的總價格
        float price = (Float)msg.obj;
        if(price > 0){
          integral_sum.setText(price+"");
        }else{
          integral_sum.setText("0");
        }
      }
      else if(msg.what == 11){
        //列表選中狀態
        List<Boolean> array = (List<Boolean>) msg.obj;
        if (Test.isAllFalse(array)) {
          checkBox_select_all.setChecked(false);
          checkBox_add.setChecked(false);
        }
        if (.isAllTrue(array)) {
          checkBox_select_all.setChecked(true);
          checkBox_add.setChecked(true);
        }
        if (Test.isHaveOneFasle(array)) {
          checkBox_select_all.setChecked(false);
        }
        if (Test.isHaveOneTrue(array)) {
          checkBox_add.setChecked(true);
        }
      }
    }
  };

actvity中XML的代碼：

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android" xmlns:header=http://schemas.android.com/apk/res/com.sxc.test"
  android:layout_width="match_parent"
  android:layout_height="match_parent"
  android:background="@color/app_background"
  android:orientation="vertical" >

  <com.autoserve.core.widget.HeaderWidget
    android:id="@+id/header"
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:layout_alignParentTop="true"
    header:text="我的購物車" />

  <LinearLayout
    android:id="@+id/layout1"
    android:layout_width="match_parent"
    android:layout_height="40dp"
    android:layout_below="@id/header"
    android:layout_gravity="center"
    android:layout_marginTop="20dp"
    android:background="@color/white"
    android:orientation="horizontal" >

    <LinearLayout
      android:layout_width="0dp"
      android:layout_height="match_parent"
      android:layout_marginLeft="10dp"
      android:layout_weight="1"
      android:gravity="center_vertical"
      android:orientation="horizontal" >

      <CheckBox
        android:id="@+id/checkbox_select"
        
        android:layout_width="wrap_content"
        android:layout_height="wrap_content" />

      <TextView
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_marginLeft="10dp"
        android:text="全選"
        android:textColor="@color/gry_666666"
        android:textSize="@dimen/small_size" />
    </LinearLayout>

    <LinearLayout
      android:id="@+id/clear"
      android:layout_width="wrap_content"
      android:layout_height="match_parent"
      android:layout_marginRight="20dp"
      android:gravity="center_vertical|right"
      android:orientation="horizontal" >

      <CheckBox
        android:layout_width="12dp"
        android:layout_height="12dp"
        android:background="@drawable/clear" />

      <TextView
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_marginLeft="5dp"
        android:text="清空購物車"
        android:textColor="#b61d1d"
        android:textSize="@dimen/small_size" />
    </LinearLayout>
  </LinearLayout>

  <LinearLayout
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:layout_below="@id/layout1"
    android:layout_marginBottom="50dp"
    android:orientation="vertical" >

    <View
      android:layout_width="match_parent"
      android:layout_height="0.1dp"
      android:background="@color/divider_color" />

    <ListView
      android:id="@+id/finance_list"
      android:layout_width="match_parent"
      android:layout_height="match_parent"
      android:clickable="false"
      android:divider="@color/lucency" />

    <include
      layout="@layout/include_refresh"
      android:visibility="gone" />
  </LinearLayout>

  <LinearLayout
    android:layout_width="match_parent"
    android:layout_height="50dp"
    android:layout_alignParentBottom="true"
    android:orientation="horizontal" >

    <LinearLayout
      android:layout_width="0dp"
      android:layout_height="match_parent"
      android:layout_weight="2"
      android:background="@color/gry_999999"
      android:gravity="center_vertical"
      android:orientation="horizontal" >

      <LinearLayout
        android:layout_width="wrap_content"
        android:layout_height="match_parent"
        android:layout_marginLeft="5dp"
        android:layout_marginRight="5dp"
        android:gravity="center"
        android:orientation="horizontal" >

        <CheckBox
          android:id="@+id/checkbox_add"
          
          android:layout_width="wrap_content"
          android:clickable="false"
          android:layout_height="wrap_content" />
      </LinearLayout>

      <LinearLayout
        android:layout_width="0dp"
        android:layout_height="match_parent"
        android:layout_weight="1"
        android:gravity="center"
        android:orientation="horizontal" >

        <TextView
          android:layout_width="wrap_content"
          android:layout_height="wrap_content"
          android:text="合計："
          android:textColor="@color/white"
          android:textSize="@dimen/small_size" />

        <TextView
          android:id="@+id/integral_sum"
          android:layout_width="wrap_content"
          android:layout_height="wrap_content"
          android:layout_marginLeft="5dp"
          android:layout_marginRight="5dp"
          android:text="0"
          android:textColor="@color/theme_color"
          android:textSize="@dimen/small_size" />

        <TextView
          android:layout_width="wrap_content"
          android:layout_height="wrap_content"
          android:text="積分"
          android:textColor="@color/white"
          android:textSize="@dimen/small_size" />
      </LinearLayout>
    </LinearLayout>

    <TextView
      android:layout_width="0dp"
      android:layout_height="match_parent"
      android:layout_weight="1"
      android:background="@color/theme_color"
      android:gravity="center"
      android:text="結算"
      android:textColor="@color/white"
      android:textSize="@dimen/small_size" />
  </LinearLayout>

</RelativeLayout>

-XML中頭部可以到網上找一個這裡就不放上來了
.checkbox和button的樣式可以根據個人喜好設置。

Adaper中的代碼：

public class ShoppingCartAdapter extends BaseAdapter {

  private Context context;
  private List<Test> loans;
  private LayoutInflater inflater;
  private static HashMap<Integer, Boolean> isSelected;
  private static HashMap<Integer, Integer> numbers;
  private Handler handler;
  int num;// 商品數量

  static class ViewHolder { // 自定義控件集合
    public CheckBox ck_select;
    public ImageView pic_goods;
    public TextView id_goods;
    public TextView color_goods;
    public TextView type_goods;
    public TextView integral_goods;
    public AddMinusWidget add_minus;
    public LinearLayout layout;
    public TextView number;
    public Button minus;
    public Button plus;
  }

  /**
   * 實例化Adapter
   * 
   * @param context
   * @param data
   */
  public ShoppingCartAdapter(Context context, Handler handler, List<Test> data) {
    this.context = context;
    this.inflater = LayoutInflater.from(context);
    this.loans = data;
    this.handler = handler;
    isSelected = new HashMap<Integer, Boolean>();
    numbers = new HashMap<Integer, Integer>();
    initDate();
  }

  private void initDate() {
    for (int i = 0; i < loans.size(); i++) {
      getIsSelected().put(i, false);
      getNumbers().put(i, 1);
    }
  }

  @Override
  public int getCount() {
    return loans.size();
  }

  @Override
  public Object getItem(int position) {
    return loans.get(position);
  }

  @Override
  public long getItemId(int position) {
    return position;
  }

  @Override
  public View getView(final int position, View convertView, ViewGroup parent) {
    // 自定義視圖
    ViewHolder itemView = null;
    if (convertView == null) {
      // 獲取list_item布局文件的視圖
      itemView = new ViewHolder();
      convertView = inflater.inflate(R.layout.list_shopping_cart_item,
          null);
      // 獲取控件對象
      itemView.ck_select = (CheckBox) convertView
          .findViewById(R.id.ck_select);
      itemView.pic_goods = (ImageView) convertView
          .findViewById(R.id.pic_goods);
      itemView.id_goods = (TextView) convertView
          .findViewById(R.id.id_goods);
      itemView.color_goods = (TextView) convertView
          .findViewById(R.id.color_goods);
      itemView.type_goods = (TextView) convertView
          .findViewById(R.id.type_goods);
      itemView.integral_goods = (TextView) convertView
          .findViewById(R.id.integral_goods);
      itemView.number = (TextView) convertView.findViewById(R.id.number);
      itemView.minus = (Button) convertView.findViewById(R.id.minus);
      itemView.plus = (Button) convertView.findViewById(R.id.plus);
      convertView.setTag(itemView);
    } else {
      itemView = (ViewHolder) convertView.getTag();
    }

    init(itemView, position);

    itemView.ck_select.setChecked(getIsSelected().get(position));
    itemView.number.setText(getNumbers().get(position).toString());
    if (getIsSelected().get(position)) {
      itemView.ck_select.setChecked(true);
    } else {
      itemView.ck_select.setChecked(false);
    }

    String a = itemView.number.getText().toString();
    loans.get(position).setNum(Integer.valueOf(a));

    Test test = loans.get(position);
    itemView.id_goods.setText((CharSequence) test.getId());
    itemView.color_goods.setText((CharSequence) test.getColor());
    itemView.type_goods.setText((CharSequence) test.getType());
    itemView.integral_goods.setText((CharSequence) test.getIntegral());
    itemView.pic_goods.setImageResource(R.drawable.shopping);
    return convertView;
  }

  private void init(final ViewHolder itemView, final int position) {

    itemView.ck_select
        .setOnCheckedChangeListener(new OnCheckedChangeListener() {

          @Override
          public void onCheckedChanged(CompoundButton buttonView,
              boolean isChecked) {
            isSelected.put(position, true);
            getIsSelected().put(position, isChecked);
            itemView.ck_select.setChecked(getIsSelected().get(
                position));
            handler.sendMessage(handler.obtainMessage(10,
                getTotalPrice()));

            Iterator iterator = isSelected.entrySet().iterator();
            List<Boolean> array = new ArrayList<Boolean>();
            while (iterator.hasNext()) {
              HashMap.Entry entry = (HashMap.Entry) iterator
                  .next();
              Integer key = (Integer) entry.getKey();
              Boolean val = (Boolean) entry.getValue();
              array.add(val);
            }
            handler.sendMessage(handler.obtainMessage(11, array));
          }
        });

    final String numString = itemView.number.getText().toString();
    itemView.plus.setOnClickListener(new OnClickListener() {

      @Override
      public void onClick(View v) {

        if (numString == null || numString.equals("")) {
          num = 1;
          itemView.number.setText("1");
        } else {
          if (++num < 1) // 先加，再判斷
          {
            num--;

            Toast.makeText(context, "請輸入一個大於0的數字",
                Toast.LENGTH_SHORT).show();
          } else {
            itemView.number.setText(String.valueOf(num));
            loans.get(position).setNum(num);
            numbers.put(position, num);
            handler.sendMessage(handler.obtainMessage(10,
                getTotalPrice()));
            Log.i("test", "+:" + num);
          }
        }
      }
    });
    itemView.minus.setOnClickListener(new OnClickListener() {

      @Override
      public void onClick(View v) {

        if (numString == null || numString.equals("")) {
          num = 1;
          itemView.number.setText("1");
        } else {
          if (--num < 1) // 先加，再判斷
          {
            num++;
            Log.i("test", "-:" + num);
            Toast.makeText(context, "請輸入一個大於0的數字",
                Toast.LENGTH_SHORT).show();
            Log.i("test", "-:" + num);
          } else {
            itemView.number.setText(String.valueOf(num));
            Log.i("test", "-:" + num);
            loans.get(position).setNum(num);
            numbers.put(position, num);
            handler.sendMessage(handler.obtainMessage(10,
                getTotalPrice()));
          }
        }

      }
    });

  }

  /**
   * 計算選中商品的積分
   * 
   * @return 返回需要付費的總積分
   */
  private float getTotalPrice() {
    Test bean = null;
    float totalPrice = 0;
    for (int i = 0; i < loans.size(); i++) {
      bean = loans.get(i);
      if (ShoppingCartAdapter.getIsSelected().get(i)) {
        totalPrice += bean.getNum()
            * Integer.valueOf(bean.getIntegral());
      }
    }
    return totalPrice;
  }

  public static HashMap<Integer, Boolean> getIsSelected() {
    return isSelected;
  }

  public static void setIsSelected(HashMap<Integer, Boolean> isSelected) {
    ShoppingCartAdapter.isSelected = isSelected;
  }

  public static HashMap<Integer, Integer> getNumbers() {
    return numbers;
  }

  public static void setNumbers(HashMap<Integer, Integer> numbers) {
    ShoppingCartAdapter.numbers = numbers;
  }
}

Adapter中的XML代碼：

<?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:descendantFocusability="blocksDescendants"
  android:background="@color/white"

  android:orientation="vertical" >
  <View
    android:layout_width="match_parent"
    android:layout_height="0.1dp"
    android:background="@color/divider_color" />

  <LinearLayout
    android:id="@+id/layout5"
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:gravity="center_vertical"
    android:orientation="horizontal"
    android:padding="5dp" >

    <CheckBox
      android:id="@+id/ck_select"
      
      android:layout_width="wrap_content"
      android:focusable="false"
      android:layout_height="wrap_content"
      android:layout_marginRight="5dp" />

    <ImageView
      android:id="@+id/pic_goods"
      android:layout_width="wrap_content"
      android:layout_height="wrap_content"
      android:scaleType="fitCenter"
      android:src="@drawable/shopping" />

    <LinearLayout
      android:layout_width="match_parent"
      android:layout_height="wrap_content"
      android:layout_marginLeft="10dp"
      android:orientation="vertical" >

      <TextView
        android:id="@+id/id_goods"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="短襪男士星期 POLO棉襪潮男秋冬款禮盒裝"
        android:textColor="@color/gry_999999"
        android:textSize="@dimen/small_size" />

      <LinearLayout
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:orientation="horizontal" >

        <LinearLayout
          android:layout_width="wrap_content"
          android:layout_height="wrap_content"
          android:orientation="vertical" >

          <LinearLayout
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:orientation="horizontal" >

            <TextView
              android:layout_width="wrap_content"
              android:layout_height="wrap_content"
              android:text="顏色："
              android:textColor="@color/gry_999999"
              android:textSize="12sp" />

            <TextView
              android:id="@+id/color_goods"
              android:layout_width="wrap_content"
              android:layout_height="wrap_content"
              android:text="黑色"
              android:textColor="@color/gry_999999"
              android:textSize="12sp" />
          </LinearLayout>

          <LinearLayout
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:orientation="horizontal" >

            <TextView
              android:layout_width="wrap_content"
              android:layout_height="wrap_content"
              android:text="規格："
              android:textColor="@color/gry_999999"
              android:textSize="12sp" />

            <TextView
              android:id="@+id/type_goods"
              android:layout_width="wrap_content"
              android:layout_height="wrap_content"
              android:text="普通"
              android:textColor="@color/gry_999999"
              android:textSize="12sp" />
          </LinearLayout>

          <LinearLayout
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:orientation="horizontal" >

            <TextView
              android:layout_width="wrap_content"
              android:layout_height="wrap_content"
              android:text="所需積分"
              android:textColor="@color/theme_color"
              android:textSize="12sp" />

            <TextView
              android:id="@+id/integral_goods"
              android:layout_width="wrap_content"
              android:layout_height="wrap_content"
              android:text="1000"
              android:layout_marginLeft="5dp"
              android:textColor="@color/theme_color"
              android:textSize="12sp" />
          </LinearLayout>
        </LinearLayout>

        <LinearLayout
          android:layout_width="match_parent"
          android:layout_height="25dp"
          android:layout_gravity="bottom"
          android:layout_marginBottom="5dp"
          android:layout_marginRight="5dp"
          android:gravity="right"
          android:orientation="horizontal" >

          <LinearLayout
    android:layout_width="80dp"
    android:layout_height="25dp"
    android:layout_gravity="right"
    android:background="@color/white"
    android:orientation="horizontal" >

    <Button
      android:id="@+id/minus"
      android:layout_width="25dp"
      android:layout_height="match_parent"
      android:background="@drawable/kuangzi1"
      android:gravity="center"
      android:focusable="false"
      android:text="-"
      android:textColor="@color/black" >
    </Button>

    <TextView
      android:id="@+id/number"
      android:layout_width="30dp"
      android:layout_height="match_parent"
      android:background="@drawable/kuangzi1"
      android:gravity="center"
      android:inputType="number"
      android:text="1"
      android:textColor="@color/black" >
    </TextView>

    <Button
      android:id="@+id/plus"
      android:layout_width="25dp"
      android:layout_height="match_parent"
      android:background="@drawable/kuangzi1"
      android:gravity="center"
      android:focusable="false"
      android:text="+"
      android:textColor="@color/black" >
    </Button>
  </LinearLayout>
        </LinearLayout>
      </LinearLayout>
    </LinearLayout>
  </LinearLayout>

  <View
    android:layout_width="match_parent"
    android:layout_height="0.1dp"
    android:background="@color/divider_color" />

</LinearLayout>

實體類：

package com.autoserve.net33.model;


public class Test {
  @Override
  public String toString() {
    return "test [id=" + id + ", color=" + color
        + ", type=" + type + ", integral=" + integral + "]";
  }

  public String getId() {
    return id;
  }
  public void setId(String id) {
    this.id = id;
  }
  public String getColor() {
    return color;
  }
  public void setColor(String color) {
    this.color = color;
  }
  public String getType() {
    return type;
  }
  public void setType(String type) {
    this.type = type;
  }
  public String getIntegral() {
    return integral;
  }
  public void setIntegral(String integral) {
    this.integral = integral;
  }
  private String id;
  private String color;
  private String type;
  private String integral;
  private int num;//商品數量
  private int sumIntegral;
  private boolean isChoosed;   //商品是否在購物車中被選中

  public Test(String id, String color, String type, String integral) {
    super();
    this.id = id;
    this.color = color;
    this.type = type;
    this.integral = integral;
  }
  public Test() {
    super();
  }

  public int getNum() {
    return num;
  }

  public void setNum(int num) {
    this.num = num;
  }

  public int getSumIntegral() {
    return sumIntegral;
  }

  public void setSumIntegral(int sumIntegral) {
    this.sumIntegral = sumIntegral;
  }

  public boolean isChoosed() {
    return isChoosed;
  }

  public void setChoosed(boolean isChoosed) {
    this.isChoosed = isChoosed;
  }  
}

以上就是本文的全部內容，祝大家在新的一年裡工作順利，事事順心，我們大家共同努力。