Android仿淘宝购物车，玩转电商购物车

private void initActionBar() {
    //隐藏标题栏
    if (getSupportActionBar() != null) {
        //去掉阴影
        getSupportActionBar().setElevation(0);
        getSupportActionBar().setDisplayShowTitleEnabled(false);
        getSupportActionBar().setDisplayShowCustomEnabled(true);
        View view = getLayoutInflater().inflate(R.layout.acitonbar, null);
        findView(view);
        getSupportActionBar().setCustomView(view, new ActionBar.LayoutParams(ViewGroup.LayoutParams.MATCH_PARENT, ViewGroup.LayoutParams.WRAP_CONTENT));
        ActionBar.LayoutParams lp = (ActionBar.LayoutParams) view.getLayoutParams();
        lp.gravity = Gravity.HORIZONTAL_GRAVITY_MASK | Gravity.CENTER_HORIZONTAL;
        getSupportActionBar().setCustomView(view, lp);
    }

    void checkGroup(int groupPosition, boolean isChecked);
    void checkChild(int groupPosition, int childPosition, boolean isChecked);
}

    if (allChildSameState) {
        group.setChoosed(isChecked);//如果子元素状态相同，那么对应的组元素也设置成这一种的同一状态
    } else {
        group.setChoosed(false);//否则一律视为未选中
    }

    if (isCheckAll()) {
        allCheckBox.setChecked(true);//全选
    } else {
        allCheckBox.setChecked(false);//反选
    }

    adapter.notifyDataSetChanged();
    calulate();

}

public ShopcatAdapter(List<StoreInfo> groups, Map<String, List<GoodsInfo>> childrens, Context mcontext) {
    this.groups = groups;
    this.childrens = childrens;
    this.mcontext = mcontext;
}

@Override
public int getGroupCount() {
    return groups.size();
}

@Override
public int getChildrenCount(int groupPosition) {
    String groupId = groups.get(groupPosition).getId();
    return childrens.get(groupId).size();
}

@Override
public Object getGroup(int groupPosition) {
    return groups.get(groupPosition);
}

@Override
public Object getChild(int groupPosition, int childPosition) {
    List<GoodsInfo> childs = childrens.get(groups.get(groupPosition).getId());
    return childs.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(final int groupPosition, boolean isExpanded, View convertView, ViewGroup parent) {
    final GroupViewHolder groupViewHolder;
    if (convertView == null) {
        convertView = View.inflate(mcontext, R.layout.item_shopcat_group, null);
        groupViewHolder = new GroupViewHolder(convertView);
        convertView.setTag(groupViewHolder);
    } else {
        groupViewHolder = (GroupViewHolder) convertView.getTag();
    }
    final StoreInfo group = (StoreInfo) getGroup(groupPosition);
    groupViewHolder.storeName.setText(group.getName());
    groupViewHolder.storeCheckBox.setOnClickListener(new View.OnClickListener() {
        @Override
        public void onClick(View v) {
            group.setChoosed(((CheckBox) v).isChecked());
            checkInterface.checkGroup(groupPosition, ((CheckBox) v).isChecked());
        }
    });
    groupViewHolder.storeCheckBox.setChecked(group.isChoosed());

    /**【文字指的是组的按钮的文字】
     * 当我们按下ActionBar的 "编辑"按钮， 应该把所有组的文字显示"编辑",并且设置按钮为不可见
     * 当我们完成编辑后，再把组的编辑按钮设置为可见
     * 不懂，请自己操作淘宝，观察一遍
     */
    if(group.isActionBarEditor()){
        group.setEditor(false);
        groupViewHolder.storeEdit.setVisibility(View.GONE);
        flag=false;
    }else{
        flag=true;
        groupViewHolder.storeEdit.setVisibility(View.VISIBLE);
    }

    /**
     * 思路:当我们按下组的"编辑"按钮后，组处于编辑状态，文字显示"完成"
     * 当我们点击“完成”按钮后，文字显示"编辑“,组处于未编辑状态
     */
    if (group.isEditor()) {
        groupViewHolder.storeEdit.setText("完成");
    } else {
        groupViewHolder.storeEdit.setText("编辑");
    }

    groupViewHolder.storeEdit.setOnClickListener(new GroupViewClick(group, groupPosition, groupViewHolder.storeEdit));
    return convertView;
}

@Override
public View getChildView(final int groupPosition, final int childPosition, boolean isLastChild, View convertView, ViewGroup parent) {
    final ChildViewHolder childViewHolder;
    if (convertView == null) {
        convertView = View.inflate(mcontext, R.layout.item_shopcat_product, null);
        childViewHolder = new ChildViewHolder(convertView);
        convertView.setTag(childViewHolder);
    } else {
        childViewHolder = (ChildViewHolder) convertView.getTag();
    }

    /**
     * 根据组的编辑按钮的可见与不可见，去判断是组对下辖的子元素编辑  还是ActionBar对组的下瞎元素的编辑
     * 如果组的编辑按钮可见，那么肯定是组对自己下辖元素的编辑
     * 如果组的编辑按钮不可见，那么肯定是ActionBar对组下辖元素的编辑
     */
    if(flag){
        if (groups.get(groupPosition).isEditor()) {
            childViewHolder.editGoodsData.setVisibility(View.VISIBLE);
            childViewHolder.delGoods.setVisibility(View.VISIBLE);
            childViewHolder.goodsData.setVisibility(View.GONE);
        } else {
            childViewHolder.delGoods.setVisibility(View.VISIBLE);
            childViewHolder.goodsData.setVisibility(View.VISIBLE);
            childViewHolder.editGoodsData.setVisibility(View.GONE);
        }
    }else{

        if(groups.get(groupPosition).isActionBarEditor()){
            childViewHolder.delGoods.setVisibility(View.GONE);
            childViewHolder.editGoodsData.setVisibility(View.VISIBLE);
            childViewHolder.goodsData.setVisibility(View.GONE);
        }else{
            childViewHolder.delGoods.setVisibility(View.VISIBLE);
            childViewHolder.goodsData.setVisibility(View.VISIBLE);
            childViewHolder.editGoodsData.setVisibility(View.GONE);
        }
    }

    final GoodsInfo child = (GoodsInfo) getChild(groupPosition, childPosition);
    if (child != null) {
        childViewHolder.goodsName.setText(child.getDesc());
        childViewHolder.goodsPrice.setText("￥" + child.getPrice() + "");
        childViewHolder.goodsNum.setText(String.valueOf(child.getCount()));
        childViewHolder.goodsImage.setImageResource(R.drawable.cmaz);
        childViewHolder.goods_size.setText("门票:" + child.getColor() + ",类型:" + child.getSize());
        //设置打折前的原价
        SpannableString spannableString = new SpannableString("￥" + child.getPrime_price() + "");
        StrikethroughSpan span = new StrikethroughSpan();
        spannableString.setSpan(span,0,spannableString.length()-1+1, Spanned.SPAN_INCLUSIVE_INCLUSIVE);
        //避免无限次的append
        if (childViewHolder.goodsPrimePrice.length() > 0) {
            childViewHolder.goodsPrimePrice.setText("");
        }
        childViewHolder.goodsPrimePrice.setText(spannableString);
        childViewHolder.goodsBuyNum.setText("x" + child.getCount() + "");
        childViewHolder.singleCheckBox.setChecked(child.isChoosed());
        childViewHolder.singleCheckBox.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                child.setChoosed(((CheckBox) v).isChecked());
                childViewHolder.singleCheckBox.setChecked(((CheckBox) v).isChecked());
                checkInterface.checkChild(groupPosition, childPosition, ((CheckBox) v).isChecked());
            }
        });
        childViewHolder.increaseGoodsNum.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                modifyCountInterface.doIncrease(groupPosition, childPosition, childViewHolder.goodsNum, childViewHolder.singleCheckBox.isChecked());
            }
        });
        childViewHolder.reduceGoodsNum.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                modifyCountInterface.doDecrease(groupPosition, childPosition, childViewHolder.goodsNum, childViewHolder.singleCheckBox.isChecked());
            }
        });
        childViewHolder.goodsNum.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                showDialog(groupPosition,childPosition,childViewHolder.goodsNum,childViewHolder.singleCheckBox.isChecked(),child);
            }
        });
        childViewHolder.delGoods.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                new AlertDialog.Builder(mcontext)
                        .setMessage("确定要删除该商品吗")
                        .setNegativeButton("取消",null)
                        .setPositiveButton("确定", new DialogInterface.OnClickListener() {
                            @Override
                            public void onClick(DialogInterface dialog, int which) {
                                modifyCountInterface.childDelete(groupPosition,childPosition);
                            }
                        })
                        .create()
                        .show();;
            }
        });
    }
    return convertView;
}
private void showDialog(final int groupPosition, final int childPosition, final View showCountView,final  boolean isChecked, final  GoodsInfo child) {
    final AlertDialog.Builder alertDialog_Builder=new AlertDialog.Builder(mcontext);
    View view= LayoutInflater.from(mcontext).inflate(R.layout.dialog_change_num,null);
    final AlertDialog  dialog=alertDialog_Builder.create();
    dialog.setView(view);
    count=child.getCount();
    final EditText num= (EditText) view.findViewById(R.id.dialog_num);
    num.setText(count+"");
    dialog.setOnShowListener(new DialogInterface.OnShowListener() {
        @Override
        public void onShow(DialogInterface dialog) {
            UtilTool.showKeyboard(mcontext,showCountView);
        }
    });
    final TextView increase= (TextView) view.findViewById(R.id.dialog_increaseNum);
    final TextView DeIncrease=(TextView)view.findViewById(R.id.dialog_reduceNum);
    final TextView pButton= (TextView) view.findViewById(R.id.dialog_Pbutton);
    final TextView nButton= (TextView) view.findViewById(R.id.dialog_Nbutton);
    nButton.setOnClickListener(new View.OnClickListener() {
        @Override
        public void onClick(View v) {
            dialog.dismiss();
        }
    });
    pButton.setOnClickListener(new View.OnClickListener() {
        @Override
        public void onClick(View v) {
            int number=Integer.parseInt(num.getText().toString().trim());
            if(number==0){
                dialog.dismiss();
            }else{
                UtilsLog.i("数量="+number+"");
                num.setText(String.valueOf(number));
                child.setCount(number);
           modifyCountInterface.doUpdate(groupPosition,childPosition,showCountView,isChecked);
             dialog.dismiss();
            }
        }
    });
    increase.setOnClickListener(new View.OnClickListener() {
        @Override
        public void onClick(View v) {
            count++;
            num.setText(String.valueOf(count));
        }
    });
    DeIncrease.setOnClickListener(new View.OnClickListener() {
        @Override
        public void onClick(View v) {
            if(count>1){
                count--;
                num.setText(String.valueOf(count));
            }
        }
    });
    dialog.show();
}
@Override
public boolean isChildSelectable(int groupPosition, int childPosition) {
    return false;
}
public GroupEditorListener getGroupEditorListener() {
    return groupEditorListener;
}
public void setGroupEditorListener(GroupEditorListener groupEditorListener) {
    this.groupEditorListener = groupEditorListener;
}
public CheckInterface getCheckInterface() {
    return checkInterface;
}
public void setCheckInterface(CheckInterface checkInterface) {
    this.checkInterface = checkInterface;
}
public ModifyCountInterface getModifyCountInterface() {
    return modifyCountInterface;
}
public void setModifyCountInterface(ModifyCountInterface modifyCountInterface) {
    this.modifyCountInterface = modifyCountInterface;
}
static class GroupViewHolder {
    @BindView(R.id.store_checkBox)
    CheckBox storeCheckBox;
    @BindView(R.id.store_name)
    TextView storeName;
    @BindView(R.id.store_edit)
    TextView storeEdit;

    public GroupViewHolder(View view) {
        ButterKnife.bind(this, view);
    }
}
public interface CheckInterface {
    void checkGroup(int groupPosition, boolean isChecked);
    void checkChild(int groupPosition, int childPosition, boolean isChecked);
}
    void doIncrease(int groupPosition, int childPosition, View showCountView, boolean isChecked);

    void doDecrease(int groupPosition, int childPosition, View showCountView, boolean isChecked);

    void doUpdate(int groupPosition,int childPosition,View showCountView, boolean isChecked);
    void childDelete(int groupPosition, int childPosition);
}
public interface GroupEditorListener {
    void groupEditor(int groupPosition);
}
private class GroupViewClick implements View.OnClickListener {
    private StoreInfo group;
    private int groupPosition;
    private TextView editor;

    public GroupViewClick(StoreInfo group, int groupPosition, TextView editor) {
        this.group = group;
        this.groupPosition = groupPosition;
        this.editor = editor;
    }
    @Override
    public void onClick(View v) {
        if (editor.getId() == v.getId()) {
            groupEditorListener.groupEditor(groupPosition);
            if (group.isEditor()) {
                group.setEditor(false);
            } else {
                group.setEditor(true);
            }
            notifyDataSetChanged();
        }
    }
}


static class ChildViewHolder {
    @BindView(R.id.single_checkBox)
    CheckBox singleCheckBox;
    @BindView(R.id.goods_image)
    ImageView goodsImage;
    @BindView(R.id.goods_name)
    TextView goodsName;
    @BindView(R.id.goods_size)
    TextView goods_size;
    @BindView(R.id.goods_price)
    TextView goodsPrice;
    @BindView(R.id.goods_prime_price)
    TextView goodsPrimePrice;
    @BindView(R.id.goods_buyNum)
    TextView goodsBuyNum;
    @BindView(R.id.goods_data)
    RelativeLayout goodsData;
    @BindView(R.id.reduce_goodsNum)
    TextView reduceGoodsNum;
    @BindView(R.id.goods_Num)
    TextView goodsNum;
    @BindView(R.id.increase_goods_Num)
    TextView increaseGoodsNum;
    @BindView(R.id.goodsSize)
    TextView goodsSize;
    @BindView(R.id.del_goods)
    TextView delGoods;
    @BindView(R.id.edit_goods_data)
    LinearLayout editGoodsData;

    public ChildViewHolder(View view) {
        ButterKnife.bind(this, view);
    }
}