購物車checkBox選中計算總價

時間 2019-11-12

原文原文鏈接

MainActivity中：android

public class MainActivity extends AppCompatActivity {

    MyListView listView;
    static Adapter adapter;
    CheckBox cb_cart_all;
    static Float zongjia;
    static TextView tv_cart_Allprice_1;
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);

        tv_cart_Allprice_1=(TextView)findViewById(R.id.tv_cart_Allprice_1);
        listView=(MyListView)findViewById(R.id.listview);
        cb_cart_all=(CheckBox)findViewById(R.id.cb_cart_all);

        //點擊全選按鈕
        cb_cart_all.setOnCheckedChangeListener(new CompoundButton.OnCheckedChangeListener() {
            @Override
            public void onCheckedChanged(CompoundButton buttonView, boolean isChecked) {
                if (isChecked){
                    //全選
                    adapter.setListDataFocuseAble();
                    jisuanZongJia();
                }else {
                    //取消選擇
//                    adapter.setListDataUnFocuseAble();
                    jisuanZongJia();
                }
                adapter.notifyDataSetChanged();
            }
        });

        adapter=new Adapter(this);
        listView.setAdapter(adapter);
        adapter.notifyDataSetChanged();
        init();
    }

    //加載數據
    public void init(){
        List<Shoucang> listdata=new ArrayList<Shoucang>();
        for(int i=0;i<5;i++){
            Shoucang shoucang=new Shoucang();
            shoucang.setDrugName("第"+i+"條");
            shoucang.setDrugmoney(""+i*10);
            //有一個id用於刪除和向後臺傳遞數據
            shoucang.setShoucangId("" +(199+i));
            shoucang.setDrugFlag(3);
            listdata.add(shoucang);
        }
        adapter.setListData(listdata);
    }
    //計算選中的總價
    static public void jisuanZongJia(){
        final List<Map<String, String>> selectData = getSelectIDList();
        float s = 0;
        for (int i = selectData.size() - 1; i >= 0; i--) {
            s+= Float.valueOf(selectData.get(i).get("zongjia"));
        }
        zongjia = s;
        shoppingCartSetTotalPrice(zongjia);
    }
    //設置總價
    public static void shoppingCartSetTotalPrice(float price){
        tv_cart_Allprice_1.setText("" + price);
    }
    //CB點擊
    public static void shoppingCartRefush(List<Shoucang> listDataRec){
        jisuanZongJia();
    }

    static public List<Map<String,String>> getSelectIDList(){
        return adapter.getselectData();
    }
}

若是須要點擊條目就選中chebox的化能夠添加app

mAddLearnListview.setOnItemClickListener(new AdapterView.OnItemClickListener() {
    @Override
    public void onItemClick(AdapterView<?> adapterView, View view, int i, long l) {

        indexArea = i;
        CheckBox checkBox = view.findViewById(R.id.add_learn_list_chebox);
        if (checkBox.isChecked()){
            checkBox.setChecked(false);
        }else {
            checkBox.setChecked(true);
        }
    }
});

mainactivity的XML佈局：ide

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout 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"
    tools:context=".MainActivity">
    <RelativeLayout
        android:id="@+id/l1"
        android:layout_width="match_parent"
        android:layout_height="40dp"
        android:background="#00c168">

        <ImageView
            android:id="@+id/backImage"
            android:onClick="exit"
            android:layout_width="wrap_content"
            android:layout_height="23dp"
            android:src="@mipmap/ic_launcher"
            android:layout_centerVertical="true"

            tools:ignore="OnClick" />
        <TextView
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:text="列表"
            android:layout_centerHorizontal="true"
            android:layout_centerVertical="true"
            android:paddingRight="15dp"
            android:layout_gravity="center_vertical"
            android:textColor="#FFFFFF"
            android:textSize="20dp"
            />
    </RelativeLayout>
    <ScrollView
        android:layout_above="@+id/view"
        android:layout_below="@id/l1"
        android:layout_width="match_parent"
        android:layout_height="match_parent">
        <RelativeLayout
            android:id="@+id/main_list_shoucang"

            android:layout_width="match_parent"
            android:layout_height="wrap_content">
            <com.guorentong.learn.listviewchebox.MyListView
                android:layout_width="match_parent"
                android:layout_height="wrap_content"
                android:id="@+id/listview"/>
        </RelativeLayout>
    </ScrollView>
    <View
        android:id="@+id/view"
        android:layout_width="match_parent"
        android:layout_height="1dp"
        android:layout_above="@+id/bottom"/>
    <RelativeLayout
        android:id="@+id/bottom"
        android:background="#ffffff"
        android:layout_width="match_parent"
        android:layout_height="60dp"
        android:layout_alignParentBottom="true"
        android:orientation="horizontal" >

        <CheckBox
            android:layout_centerVertical="true"
            android:scaleX="0.75"
            android:scaleY="0.75"
            android:id="@+id/cb_cart_all"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:layout_marginLeft="4dp"
            android:text="全選"
            android:textSize="17dp"
            android:textColor="#191919"
             />

        <RelativeLayout
            android:layout_marginRight="15dp"
            android:layout_centerVertical="true"
            android:layout_alignParentRight="true"
            android:layout_width="wrap_content"
            android:gravity="center_vertical"
            android:layout_height="wrap_content">
            <TextView
                android:id="@+id/text2"
                android:layout_centerVertical="true"
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:text="總價："/>
            <TextView
                android:id="@+id/tv_cart_Allprice_1"
                android:layout_centerVertical="true"
                android:layout_toRightOf="@+id/text2"
                android:gravity="center_vertical"
                android:layout_width="200dp"
                android:layout_height="40dp"
                android:textSize="20dp"/>
        </RelativeLayout>
    </RelativeLayout>

</RelativeLayout>

Adapter中：佈局

public class Adapter extends BaseAdapter {
    List<Map<String,String>> sd;
    Map<String,String> selectDataItem;
    private Context context;
    private List<Shoucang> listData=new ArrayList<Shoucang>();

    public Adapter(Context context) {
        super();
        this.context = context;
    }
    public List<Shoucang> getListData() {
        return listData;
    }

    public void setListData(List<Shoucang> listData) {
        this.listData = listData;
    }


    //2顯示checkBox並選中，3顯示但未選中
    //取消全選
    public void setListDataUnFocuseAble(){
        for(int idx = 0;idx < this.listData.size();idx++){
            this.listData.get(idx).setDrugFlag(3);
        }
    }

    //點擊全選
    public void setListDataFocuseAble(){
        for(int idx = 0;idx < this.listData.size();idx++){
            this.listData.get(idx).setDrugFlag(2);
        }
    }

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

    @Override
    public Object getItem(int position) {
        return null;
    }

    @Override
    public long getItemId(int position) {
        return 0;
    }


    @Override
    public View getView(final int position, View view, ViewGroup parent) {
        DrugListHolder holder=null;
        if(view==null){
            holder=new DrugListHolder();
            view= LayoutInflater.from(context).inflate(R.layout.shoucang_druglist_item, null);
            holder.itemName  =(TextView) view.findViewById(R.id.drugName);
            holder.itemMoney  =(TextView) view.findViewById(R.id.drugmoney);
            holder.cb_choice  =(CheckBox) view.findViewById(R.id.cb_choice_person_shoucang);
            view.setTag(holder);
        }else{
            holder=(DrugListHolder) view.getTag();
        }


        holder.cb_choice.setOnCheckedChangeListener(new CompoundButton.OnCheckedChangeListener() {
            @Override
            public void onCheckedChanged(CompoundButton buttonView, boolean isChecked) {
                if(isChecked){
                    listData.get(position).setDrugFlag(2);
                    MainActivity.shoppingCartRefush(listData);
                    Toast.makeText(context,"您選中了第"+position+"項",Toast.LENGTH_LONG).show();
                }else{
                    listData.get(position).setDrugFlag(3);
                    MainActivity.shoppingCartRefush(listData);
                    Toast.makeText(context, "您取消中了第" + position + "項", Toast.LENGTH_LONG).show();
                }
            }
        });
        //請求列表展現圖
        Shoucang Shoucang=listData.get(position);
        //全選和取消選擇
        if(Shoucang.getDrugFlag()==2){
            holder.cb_choice.setChecked(true);
        }else if(Shoucang.getDrugFlag()==3){
            holder.cb_choice.setChecked(false);
        }


        //ImageCacheUtil.getInstance().displayImage(context,holder.itemimage1,listData.get(position).getImgIv1());
        holder.itemName.setText("" + Shoucang.getDrugName());
        holder.itemMoney.setText("" + Shoucang.getDrugmoney());

        final String shoucangId= listData.get(position).getShoucangId();
        return view;
    }


    //列表數據
    public final class DrugListHolder {
        //列表名
        TextView itemName;
        TextView itemMoney;
        CheckBox cb_choice;
    }

    public List<Map<String,String>> getselectData(){
        sd = new ArrayList<Map<String,String>>();
        if(this.listData.size() > 0){
            for(int idx = 0;idx < this.listData.size();idx++){
                if(this.listData.get(idx).getDrugFlag() == 2){
                    selectDataItem = new HashMap<String,String>();
                    selectDataItem.put("id",this.listData.get(idx).getShoucangId());
                    selectDataItem.put("zongjia",String.valueOf(listData.get(idx).getDrugmoney()));
                    sd.add(selectDataItem);
                }
            }
        }
        return sd;
    }
}

shoucang_druglist_item佈局：this

也能夠不用ScrollView滑動3d

<?xml version="1.0" encoding="utf-8"?>
<ScrollView xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="match_parent">

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

        <LinearLayout
            android:background="#ffffff"
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:orientation="horizontal"
            android:layout_marginTop="10dp"
            android:layout_weight="1"
            android:id="@+id/caidan_line">
            <CheckBox
                android:layout_marginLeft="4dp"
                android:id="@+id/cb_choice_person_shoucang"
                android:scaleX="0.7"
                android:scaleY="0.7"
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:layout_gravity="center_vertical"
                android:focusable="false"
                android:focusableInTouchMode="false" />
            <RelativeLayout
                android:layout_width="match_parent"
                android:layout_height="130dp"
                android:layout_marginLeft="6dp"
                android:layout_marginRight="5dp"
                android:id="@+id/caidan_relativeLayout">
                <RelativeLayout
                    android:gravity="center"
                    android:id="@+id/image"
                    android:layout_width="wrap_content"
                    android:layout_height="wrap_content"
                    android:layout_centerVertical="true">
                    <ImageView
                        android:src="@mipmap/ic_launcher"
                        android:id="@+id/menu_image1_item"
                        android:layout_width="80dp"
                        android:layout_height="80dp"
                        android:layout_marginTop="15dp"
                        android:layout_centerVertical="true"
                        android:layout_centerHorizontal="true"/>
                </RelativeLayout>
                <LinearLayout
                    android:layout_marginLeft="15dp"
                    android:layout_toRightOf="@+id/image"
                    android:layout_centerVertical="true"
                    android:layout_width="match_parent"
                    android:layout_height="wrap_content"
                    android:orientation="vertical">
                    <TextView
                        android:textSize="17dp"
                        android:text="dnj"
                        android:textColor="#191919"
                        android:id="@+id/drugName"
                        android:layout_below="@id/menu_image1_item"
                        android:layout_width="wrap_content"
                        android:layout_height="wrap_content"
                        android:layout_centerHorizontal="true"/>
                    <TextView

                        android:text="sjdkkfhsk"
                        android:textSize="16dp"
                        android:textColor="#757575"
                        android:id="@+id/drugmoney"
                        android:layout_below="@id/drugName"
                        android:layout_width="wrap_content"
                        android:layout_height="wrap_content"
                        android:layout_centerHorizontal="true"/>

                </LinearLayout>
            </RelativeLayout>
        </LinearLayout>
    </LinearLayout>

</ScrollView>

這裏用用的MyListView 解決listview和scrollView的衝突問題。xml

MyListView:ip

public class MyListView extends ListView{
    public MyListView(Context context) {
        // TODO Auto-generated method stub
        super(context);
    }

    public MyListView(Context context, AttributeSet attrs) {
        // TODO Auto-generated method stub
        super(context, attrs);
    }

    public MyListView(Context context, AttributeSet attrs, int defStyle) {
        // TODO Auto-generated method stub
        super(context, attrs, defStyle);
    }

    @Override
    protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {
        // TODO Auto-generated method stub
        int expandSpec = MeasureSpec.makeMeasureSpec(Integer.MAX_VALUE >> 2,
                MeasureSpec.AT_MOST);
        super.onMeasure(widthMeasureSpec, expandSpec);
    }
}

實體類Shoucang:utf-8

其中private int drugFlag;參數get

是爲了判斷是否選中的參數

public class Shoucang {

    private String drugName;
    private String Drugmoney;
    private int drugFlag;
    private String shoucangId;

    public Shoucang() {
    }
    public String getDrugName() {
        return drugName;
    }

    public void setDrugName(String drugName) {
        this.drugName = drugName;
    }

    public String getDrugmoney() {
        return Drugmoney;
    }

    public void setDrugmoney(String drugmoney) {
        Drugmoney = drugmoney;
    }

    public int getDrugFlag() {
        return drugFlag;
    }

    public void setDrugFlag(int drugFlag) {
        this.drugFlag = drugFlag;
    }

    public String getShoucangId() {
        return shoucangId;
    }

    public void setShoucangId(String shoucangId) {
        this.shoucangId = shoucangId;
    }
}