Android仿淘宝购物车

最近项目需要实现类似淘宝购物车的功能，仿了一个,直接上代码：

public class MainActivity extends Activity implements OnCartListener, View.OnClickListener {    private static final boolean DEBUG = true;    private static final String TAG = MainActivity.class.getSimpleName();    private ExpandableListView mCartExpandableListView;    private TextView mAllCostView;    private TextView mSettlementButton;    private CheckBox mAllCheckView;    private CartAdapter mCartAdapter;    private ArrayList<CartEntity> mCartEntityList = new ArrayList<CartEntity>();    private boolean isAllCheck;    private void initView() {        mAllCostView = (TextView) findViewById(R.id.all_cost);        mSettlementButton = (TextView) findViewById(R.id.settlement);        mCartExpandableListView = (ExpandableListView) findViewById(R.id.expandableListView);        mAllCheckView = (CheckBox) findViewById(R.id.all_check);    }    @Override    protected void onCreate(Bundle savedInstanceState) {        super.onCreate(savedInstanceState);        setContentView(R.layout.activity_main);        initView();        setUpCart();        mAllCheckView.setOnClickListener(this);        mSettlementButton.setOnClickListener(this);    }    private void setUpCart() {        mCartAdapter = new CartAdapter(this, mCartEntityList);        mCartExpandableListView.setAdapter(mCartAdapter);        mCartAdapter.setOnCartListener(this);        mCartEntityList.addAll(getData());        mCartAdapter.notifyDataSetChanged();        for (int i = 0; i < mCartEntityList.size(); i++) {            mCartExpandableListView.expandGroup(i);        }    }    private ArrayList<CartEntity> getData() {        ArrayList<CartEntity> cartEntityList = new ArrayList<CartEntity>();        for (int i = 0; i < 3; i++) {            CartEntity cartEntity = new CartEntity();            ArrayList<ProductEntity> productEntityList = new ArrayList<ProductEntity>();            for (int j = 0; j < Math.random() * 2 + 1; j++) {                ProductEntity productEntity = new ProductEntity();                productEntity.setProductPrice((float) (Math.random() * 100));                productEntity.setProductCount(1);                productEntityList.add(productEntity);            }            cartEntity.setProductEntityList(productEntityList);            cartEntityList.add(cartEntity);        }        return cartEntityList;    }    private void setCheckGroup(int groupPosition, boolean check) {        int len = mCartEntityList.get(groupPosition).getProductEntityList().size();        mCartEntityList.get(groupPosition).setGroupCheck(check);        for (int i = 0; i < len; i++) {            mCartEntityList.get(groupPosition).getProductEntityList().get(i).setChildCheck(check);        }    }    private void setCheckChild(int groupPosition, int childPosition, boolean check) {        mCartEntityList.get(groupPosition).getProductEntityList().get(childPosition).setChildCheck(check);        int len = mCartEntityList.get(groupPosition).getProductEntityList().size();        boolean groupCheck = true;        for (int i = 0; i < len; i++) {            if (!mCartEntityList.get(groupPosition).getProductEntityList().get(i).isChildCheck()) {                groupCheck = false;            }        }        mCartEntityList.get(groupPosition).setGroupCheck(groupCheck);    }    private void handleAllCost() {        float allCost = 0f;        int allCount = 0;        int groupLen = mCartEntityList.size();        for (int i = 0; i < groupLen; i++) {            int childLen = mCartEntityList.get(i).getProductEntityList().size();            for (int j = 0; j < childLen; j++) {                if (mCartEntityList.get(i).getProductEntityList().get(j).isChildCheck()) {                    allCost += mCartEntityList.get(i).getProductEntityList().get(j).getProductPrice() * mCartEntityList.get(i).getProductEntityList().get(j).getProductCount();                    allCount++;                }            }        }        mAllCostView.setText("￥" + String.format("%.2f", allCost));        mSettlementButton.setText("结算(" + allCount + ")");    }    private void deleteProduct(int groupPosition, int childPosition) {        mCartEntityList.get(groupPosition).getProductEntityList().remove(childPosition);        if (mCartEntityList.get(groupPosition).getProductEntityList().isEmpty()) {            mCartEntityList.remove(groupPosition);        }    }    @Override    public void groupCheck(int groupPosition) {        log("---groupCheck()---" + "groupPosition:" + groupPosition);        setCheckGroup(groupPosition, !mCartEntityList.get(groupPosition).isGroupCheck());        handleAllCost();        mCartAdapter.notifyDataSetChanged();    }    @Override    public void groupClick() {        log("---groupClick()---");        mCartAdapter.notifyDataSetChanged();    }    @Override    public void groupEdit(int groupPosition) {        log("---groupEdit()---");        mCartEntityList.get(groupPosition).setGroupEdit(!mCartEntityList.get(groupPosition).isGroupEdit());        mCartAdapter.notifyDataSetChanged();    }    @Override    public void childCheck(int groupPosition, int childPosition) {        log("---childCheck()---" + "groupPosition:" + groupPosition + "，childPosition:" + childPosition);        setCheckChild(groupPosition, childPosition, !mCartEntityList.get(groupPosition).getProductEntityList().get(childPosition).isChildCheck());        handleAllCost();        mCartAdapter.notifyDataSetChanged();    }    @Override    public void childDelete(int groupPosition, int childPosition) {        log("---childDelete()---" + "groupPosition:" + groupPosition + "，childPosition:" + childPosition);        deleteProduct(groupPosition, childPosition);        handleAllCost();        mCartAdapter.notifyDataSetChanged();    }    @Override    public void childIncrease(int groupPosition, int childPosition) {        log("---childIncrease()---");        mCartEntityList.get(groupPosition).getProductEntityList().get(childPosition).setProductCount                (mCartEntityList.get(groupPosition).getProductEntityList().get(childPosition).getProductCount() + 1);        mCartAdapter.notifyDataSetChanged();    }    @Override    public void childReduce(int groupPosition, int childPosition) {        log("---childReduce()---");        if(mCartEntityList.get(groupPosition).getProductEntityList().get(childPosition).getProductCount() <= 1) return;        mCartEntityList.get(groupPosition).getProductEntityList().get(childPosition).setProductCount                (mCartEntityList.get(groupPosition).getProductEntityList().get(childPosition).getProductCount() - 1);        mCartAdapter.notifyDataSetChanged();    }    @Override    public void childClick() {        log("---childClick()---");        mCartAdapter.notifyDataSetChanged();    }    @Override    public void childEdit() {        log("---childEdit()---");        mCartAdapter.notifyDataSetChanged();    }    private void log(String message) {        if (DEBUG) {            Log.d(TAG, message);        }    }    @Override    public void onClick(View v) {        switch (v.getId()) {            case R.id.all_check:                isAllCheck = !isAllCheck;                setAllCheck(isAllCheck);                break;            case R.id.settlement:                if (!verifyCart()) {                    Toast.makeText(MainActivity.this, R.string.select_tip, Toast.LENGTH_SHORT).show();                }                break;        }    }    private void setAllCheck(boolean check) {        int groupLen = mCartEntityList.size();        for (int i = 0; i < groupLen; i++) {            setCheckGroup(i, check);        }        handleAllCost();        mCartAdapter.notifyDataSetChanged();    }    private boolean verifyCart() {        int groupLen = mCartEntityList.size();        boolean flag = false;        for (int i = 0; i < groupLen; i++) {            int childLen = mCartEntityList.get(i).getProductEntityList().size();            for (int j = 0; j < childLen; j++) {                if (mCartEntityList.get(i).getProductEntityList().get(j).isChildCheck()) {                    flag = true;                }            }        }        return flag;    }}

public interface OnCartListener {    public void groupCheck(int groupPosition);    public void groupClick();    public void groupEdit(int groupPosition);    public void childCheck(int groupPosition,int childPosition);    public void childDelete(int groupPosition,int childPosition);    public void childIncrease(int groupPosition,int childPosition);    public void childReduce(int groupPosition,int childPosition);    public void childClick();    public void childEdit();}

适配器：

public class CartAdapter extends BaseExpandableListAdapter implements View.OnClickListener{    private Context context;    private ArrayList<CartEntity> mCartEntityList;    public CartAdapter(Context context,ArrayList<CartEntity> cartEntitiyList){        this.context = context;        mCartEntityList = cartEntitiyList;    }    private OnCartListener mCartListener;    public void setOnCartListener(OnCartListener cartListener){        mCartListener = cartListener;    }    @Override    public int getGroupCount() {        return mCartEntityList.size();    }    @Override    public int getChildrenCount(int groupPosition) {        return mCartEntityList.get(groupPosition).getProductEntityList().size();    }    @Override    public Object getGroup(int groupPosition) {        return mCartEntityList.get(groupPosition);    }    @Override    public Object getChild(int groupPosition, int childPosition) {        return mCartEntityList.get(groupPosition).getProductEntityList().get(childPosition);    }    @Override    public long getGroupId(int groupPosition) {        return groupPosition;    }    @Override    public long getChildId(int groupPosition, int childPosition) {        return childPosition;    }    @Override    public boolean hasStableIds() {        return false;    }    @Override    public View getGroupView(int groupPosition, boolean isExpanded, View convertView, ViewGroup parent) {        GroupViewHolder groupViewHolder = null;        if(null == convertView){            groupViewHolder = new GroupViewHolder();            convertView = LayoutInflater.from(context).inflate(R.layout.item_cart_group,parent,false);            groupViewHolder.checkBox = (CheckBox) convertView.findViewById(R.id.group_checkBox);            groupViewHolder.shopName = (TextView) convertView.findViewById(R.id.shop_name);            groupViewHolder.shopIcon = (ImageView) convertView.findViewById(R.id.shop_icon);            groupViewHolder.shoplayout = convertView.findViewById(R.id.shop_layout);            groupViewHolder.groupEdit = (TextView) convertView.findViewById(R.id.group_edit);            groupViewHolder.groupDividerView = convertView.findViewById(R.id.divider_group);            convertView.setTag(groupViewHolder);        }else {            groupViewHolder = (GroupViewHolder) convertView.getTag();        }        if(0 == groupPosition){            groupViewHolder.groupDividerView.setVisibility(View.GONE);        }else {            groupViewHolder.groupDividerView.setVisibility(View.VISIBLE);        }        groupViewHolder.checkBox.setChecked(mCartEntityList.get(groupPosition).isGroupCheck());        if(mCartEntityList.get(groupPosition).isGroupEdit()){            groupViewHolder.groupEdit.setText(R.string.complete);        }else {            groupViewHolder.groupEdit.setText(R.string.edit);        }        groupViewHolder.checkBox.setTag(R.integer.view_group_tag, groupPosition);        groupViewHolder.groupEdit.setTag(R.integer.view_group_tag, groupPosition);        groupViewHolder.checkBox.setOnClickListener(this);        groupViewHolder.shoplayout.setOnClickListener(this);        groupViewHolder.groupEdit.setOnClickListener(this);        return convertView;    }    @Override    public View getChildView(int groupPosition, int childPosition, boolean isLastChild, View convertView, ViewGroup parent) {        ChildViewHolder childViewHolder = null;        if(null == convertView){            childViewHolder = new ChildViewHolder();            convertView = LayoutInflater.from(context).inflate(R.layout.item_cart_child,parent,false);            childViewHolder.checkBox = (CheckBox) convertView.findViewById(R.id.child_checkBox);            childViewHolder.productName = (TextView) convertView.findViewById(R.id.product_name);            childViewHolder.productIcon = (ImageView) convertView.findViewById(R.id.product_icon);            childViewHolder.productCount = (TextView) convertView.findViewById(R.id.product_count);            childViewHolder.productPrice = (TextView) convertView.findViewById(R.id.product_price);            childViewHolder.productInfo = (TextView) convertView.findViewById(R.id.product_info);            childViewHolder.childDeleteButton = (TextView) convertView.findViewById(R.id.child_delete);            childViewHolder.viewEdit = convertView.findViewById(R.id.layout_edit);            childViewHolder.viewComplete = convertView.findViewById(R.id.layout_complete);            childViewHolder.increaseBtn = (ImageView) convertView.findViewById(R.id.btn_increase);            childViewHolder.reduceBtn = (ImageView) convertView.findViewById(R.id.btn_reduce);            childViewHolder.editProdcutCount = (TextView) convertView.findViewById(R.id.edit_product_count);            convertView.setTag(childViewHolder);        }else {            childViewHolder = (ChildViewHolder) convertView.getTag();        }        if(mCartEntityList.get(groupPosition).isGroupEdit()){            childViewHolder.viewEdit.setVisibility(View.VISIBLE);            childViewHolder.viewComplete.setVisibility(View.INVISIBLE);        }else {            childViewHolder.viewEdit.setVisibility(View.INVISIBLE);            childViewHolder.viewComplete.setVisibility(View.VISIBLE);        }        childViewHolder.checkBox.setChecked(mCartEntityList.get(groupPosition).getProductEntityList().get(childPosition).isChildCheck());        childViewHolder.productPrice.setText("￥" + String.format("%.2f", mCartEntityList.get(groupPosition).getProductEntityList().get(childPosition).getProductPrice()));        childViewHolder.editProdcutCount.setText(mCartEntityList.get(groupPosition).getProductEntityList().get(childPosition).getProductCount()+"");        childViewHolder.productCount.setText("x"+mCartEntityList.get(groupPosition).getProductEntityList().get(childPosition).getProductCount());        childViewHolder.checkBox.setTag(R.integer.view_group_tag, groupPosition);        childViewHolder.checkBox.setTag(R.integer.view_child_tag, childPosition);        childViewHolder.checkBox.setOnClickListener(this);        childViewHolder.childDeleteButton.setTag(R.integer.view_group_tag, groupPosition);        childViewHolder.childDeleteButton.setTag(R.integer.view_child_tag, childPosition);        childViewHolder.childDeleteButton.setOnClickListener(this);        childViewHolder.increaseBtn.setTag(R.integer.view_group_tag, groupPosition);        childViewHolder.increaseBtn.setTag(R.integer.view_child_tag, childPosition);        childViewHolder.increaseBtn.setOnClickListener(this);        childViewHolder.reduceBtn.setTag(R.integer.view_group_tag, groupPosition);        childViewHolder.reduceBtn.setTag(R.integer.view_child_tag, childPosition);        childViewHolder.reduceBtn.setOnClickListener(this);        return convertView;    }    @Override    public boolean isChildSelectable(int groupPosition, int childPosition) {        return false;    }    @Override    public void onClick(View v) {        if(null == mCartListener) return;        switch (v.getId()){            case R.id.group_checkBox:                mCartListener.groupCheck((int) v.getTag(R.integer.view_group_tag));                break;            case R.id.child_checkBox:                mCartListener.childCheck((int) v.getTag(R.integer.view_group_tag), (int) v.getTag(R.integer.view_child_tag));                break;            case R.id.shop_layout:                mCartListener.groupClick();                break;            case R.id.group_edit:                mCartListener.groupEdit((int) v.getTag(R.integer.view_group_tag));                break;            case R.id.child_delete:                mCartListener.childDelete((int)v.getTag(R.integer.view_group_tag),(int)v.getTag(R.integer.view_child_tag));                break;            case R.id.btn_increase:                mCartListener.childIncrease((int)v.getTag(R.integer.view_group_tag),(int)v.getTag(R.integer.view_child_tag));                break;            case R.id.btn_reduce:                mCartListener.childReduce((int) v.getTag(R.integer.view_group_tag), (int) v.getTag(R.integer.view_child_tag));                break;        }}    private static class GroupViewHolder{        CheckBox checkBox;        ImageView shopIcon;        TextView shopName;        TextView groupEdit;        View shoplayout;        View groupDividerView;    }    private static class ChildViewHolder{        CheckBox checkBox;        ImageView productIcon;        TextView productName;        TextView productInfo;        TextView productPrice;        TextView productCount;        TextView childDeleteButton;        View viewEdit;        View viewComplete;        ImageView increaseBtn;        ImageView reduceBtn;        TextView editProdcutCount;    }}

下载地址：https://github.com/piratecode/TaoBaoCart