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 = ; i < mCartEntityList.size(); i++) {
            mCartExpandableListView.expandGroup(i);
        }
    }

    private ArrayList<CartEntity> getData() {
        ArrayList<CartEntity> cartEntityList = new ArrayList<CartEntity>();
        for (int i = ; i < ; i++) {
            CartEntity cartEntity = new CartEntity();
            ArrayList<ProductEntity> productEntityList = new ArrayList<ProductEntity>();
            for (int j = ; j < Math.random() *  + ; j++) {
                ProductEntity productEntity = new ProductEntity();
                productEntity.setProductPrice((float) (Math.random() * ));
                productEntity.setProductCount();
                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 = ; 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 = ; i < len; i++) {
            if (!mCartEntityList.get(groupPosition).getProductEntityList().get(i).isChildCheck()) {
                groupCheck = false;
            }
        }
        mCartEntityList.get(groupPosition).setGroupCheck(groupCheck);
    }

    private void handleAllCost() {
        float allCost = f;
        int allCount = ;
        int groupLen = mCartEntityList.size();
        for (int i = ; i < groupLen; i++) {
            int childLen = mCartEntityList.get(i).getProductEntityList().size();
            for (int j = ; 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() + );
        mCartAdapter.notifyDataSetChanged();
    }

    @Override
    public void childReduce(int groupPosition, int childPosition) {
        log("---childReduce()---");
        if(mCartEntityList.get(groupPosition).getProductEntityList().get(childPosition).getProductCount() <= ) return;
        mCartEntityList.get(groupPosition).getProductEntityList().get(childPosition).setProductCount
                (mCartEntityList.get(groupPosition).getProductEntityList().get(childPosition).getProductCount() - );
        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 = ; i < groupLen; i++) {
            setCheckGroup(i, check);
        }
        handleAllCost();
        mCartAdapter.notifyDataSetChanged();
    }

    private boolean verifyCart() {
        int groupLen = mCartEntityList.size();
        boolean flag = false;
        for (int i = ; i < groupLen; i++) {
            int childLen = mCartEntityList.get(i).getProductEntityList().size();
            for (int j = ; 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( == 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

Android仿淘宝购物车

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