商品詳情介面點選跳轉到購物車（二）購物車介面
阿新 • • 發佈：2019-01-27
//佈局檔案
<LinearLayout 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" android:orientation="vertical" tools:context="com.example.gaochao.shopcartdemo1.ShopCartActivity"> <ExpandableListView android:id="@+id/elv" android:layout_width="match_parent" android:layout_height="match_parent" android:layout_weight="1" /> <RelativeLayout android:layout_width="match_parent" android:layout_height="40dp"> <CheckBox android:id="@+id/cb" android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_centerVertical="true" android:text="全選" /> <TextView android:id="@+id/tvTotal" android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_centerVertical="true" android:layout_marginLeft="15dp" android:layout_toRightOf="@id/cb" android:text="合計:" /> <TextView android:id="@+id/tvCount" android:layout_width="100dp" android:layout_height="match_parent" android:layout_alignParentRight="true" android:layout_centerVertical="true" android:background="#ff0000" android:gravity="center" android:text="去結算(0)" android:textColor="#ffffff" /> </RelativeLayout> </LinearLayout>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" android:orientation="vertical" android:layout_width="match_parent" android:layout_height="match_parent"> <CheckBox android:id="@+id/cbGroup" android:layout_width="wrap_content" android:layout_height="wrap_content" /> <TextView android:id="@+id/tvGroup" android:layout_width="match_parent" android:layout_height="40dp" android:gravity="center_vertical" /> </LinearLayout>
<LinearLayout android:orientation="horizontal" xmlns:android="http://schemas.android.com/apk/res/android" android:layout_width="match_parent" android:layout_height="match_parent"> <CheckBox android:id="@+id/cbChild" android:layout_width="wrap_content" android:layout_height="wrap_content" /> <ImageView android:id="@+id/iv" android:layout_width="100dp" android:layout_height="100dp" /> <LinearLayout android:layout_width="match_parent" android:layout_height="wrap_content" android:layout_weight="1" android:orientation="vertical"> <TextView android:id="@+id/tvTitle" android:layout_width="wrap_content" android:layout_height="wrap_content" /> <TextView android:id="@+id/tvSubhead" android:layout_width="wrap_content" android:layout_height="wrap_content" /> <LinearLayout android:layout_width="match_parent" android:layout_height="wrap_content" android:gravity="center_vertical" android:orientation="horizontal"> <TextView android:id="@+id/tvPrice" android:layout_width="wrap_content" android:layout_height="wrap_content" /> <ImageView android:layout_marginLeft="10dp" android:id="@+id/ivDel" android:layout_width="25dp" android:layout_height="25dp" android:background="@drawable/iv_del" /> <TextView android:id="@+id/tvNum" android:layout_width="wrap_content" android:layout_height="wrap_content" android:textSize="25sp" android:layout_marginLeft="3dp" android:layout_marginRight="3dp" android:text="1"/> <ImageView android:id="@+id/ivAdd" android:layout_width="25dp" android:layout_height="25dp" android:background="@drawable/iv_add" /> </LinearLayout> </LinearLayout> <Button android:id="@+id/btDel" android:layout_width="wrap_content" android:layout_height="wrap_content" android:text="刪除" /> </LinearLayout>
//封裝 兩個bean 購物車商品介面bean 提取總價和結算總價 ShopCarBean priceAndCount
ShopCartBeanPriceAndCount
//m層
public interface ShopCartModelListener {
void getCart(Map<String,String> params, OnNetListener<ShopCartBean> bean);
}public class ShopCartModel implements ShopCartModelListener {
private Handler handler = new Handler();
@Override
public void getCart(Map<String, String> params, final OnNetListener<ShopCartBean> onNetListener) {
OkHttpUtils.getOkHttpUtils().doPost(API.str2, params, new Callback() {
@Override
public void onFailure(Call call, IOException e) {
}
@Override
public void onResponse(Call call, Response response) throws IOException {
String string = response.body().string();
final ShopCartBean shopCartBean = new Gson().fromJson(string, ShopCartBean.class);
handler.post(new Runnable() {
@Override
public void run() {
onNetListener.onSuccess(shopCartBean);
}
});
}
});
}
}public class ShopCartPresenter {
private ShopCartViewListener shopCartViewListener;
private ShopCartModelListener shopCartModelListener;
public ShopCartPresenter(ShopCartViewListener shopCartViewListener) {
this.shopCartViewListener = shopCartViewListener;
shopCartModelListener = new ShopCartModel();
}
public void onDettach(){
shopCartViewListener=null;
}
public void getShaopCartData(){
Map<String,String> params = new HashMap<>();
params.put("uid","1234");
params.put("pid","71");
shopCartModelListener.getCart(params, new OnNetListener<ShopCartBean>() {
@Override
public void onSuccess(ShopCartBean shopCartBean) {
if (shopCartViewListener != null){
List<ShopCartBean.DataBean> group = shopCartBean.getData();
List<List<ShopCartBean.DataBean.ListBean>> child = new ArrayList<>();
for (int i=0;i<group.size();i++){
child.add(group.get(i).getList());
}
shopCartViewListener.show(group,child);
}
}
@Override
public void onFailure(Exception e) {
}
});
}
}//v層
public interface ShopCartViewListener {
void show(List<ShopCartBean.DataBean> group,List<List<ShopCartBean.DataBean.ListBean>> child);
}public class ShopCartActivity extends AppCompatActivity implements ShopCartViewListener {
private ShopCartPresenter getCartPresenter;
private ExpandableListView mElv;
/**
* 全選
*/
private CheckBox mCb;
/**
* 合計:
*/
private TextView mTvTotal;
/**
* 去結算(0)
*/
private TextView mTvCount;
private ElcAdapter elvAdapter;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_shop_cart);
initView();
getCartPresenter = new ShopCartPresenter(this);
getCartPresenter.getShaopCartData();
mCb.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
elvAdapter.AllOrNone(mCb.isChecked());
}
});
}
@Override
protected void onDestroy() {
super.onDestroy();
getCartPresenter.onDettach();
}
@Override
public void show(List<ShopCartBean.DataBean> group, List<List<ShopCartBean.DataBean.ListBean>> child) {
elvAdapter = new ElcAdapter(this, group, child);
mElv.setGroupIndicator(null);
mElv.setAdapter(elvAdapter);
for (int i = 0; i < group.size(); i++) {
mElv.expandGroup(i);
}
}
private void initView() {
mElv = (ExpandableListView) findViewById(R.id.elv);
mCb = (CheckBox) findViewById(R.id.cb);
mTvTotal = (TextView) findViewById(R.id.tvTotal);
mTvCount = (TextView) findViewById(R.id.tvCount);
}
public void setPriceAndCount(PriceAndCount priceAndCount) {
mTvTotal.setText("合計：" + priceAndCount.getPrice());
mTvCount.setText("去結算(" + priceAndCount.getCount() + ")");
}
public void setAllChecked(boolean bool) {
mCb.setChecked(bool);
}
}
//介面卡
class ElcAdapter extends BaseExpandableListAdapter{
private Context context;
private List<ShopCartBean.DataBean> group;
private List<List<ShopCartBean.DataBean.ListBean>> child;
private final LayoutInflater inflater;
public ElcAdapter(Context context, List<ShopCartBean.DataBean> group, List<List<ShopCartBean.DataBean.ListBean>> child) {
this.context = context;
this.group = group;
this.child = child;
inflater = LayoutInflater.from(context);
}
@Override
public int getGroupCount() {
return group.size();
}
@Override
public int getChildrenCount(int groupPosition) {
return child.get(groupPosition).size();
}
@Override
public Object getGroup(int groupPosition) {
return group.get(groupPosition);
}
@Override
public Object getChild(int groupPosition, int childPosition) {
return child.get(groupPosition).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) {
View view;
final GroupViewHolder holder;
if (convertView == null) {
view = inflater.inflate(R.layout.group_item1, null);
holder = new GroupViewHolder();
holder.tv = view.findViewById(R.id.tvGroup);
holder.cbGroup = view.findViewById(R.id.cbGroup);
view.setTag(holder);
} else {
view = convertView;
holder = (GroupViewHolder) view.getTag();
}
final ShopCartBean.DataBean dataBean = group.get(groupPosition);
holder.tv.setText(dataBean.getSellerName());
holder.cbGroup.setChecked(dataBean.isChecked());
holder.cbGroup.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
//需要改變三個checkbox的狀態值
//1.一級列表的checkbox狀態值
dataBean.setChecked(holder.cbGroup.isChecked());
//2.二級列表的checkbox狀態值
setChildrenCb(groupPosition, holder.cbGroup.isChecked());
//3.全選的checkbox狀態值
((ShopCartActivity) context).setAllChecked(isAllGroupCbChecked());
//計算錢和數量並顯示
setPriceAndCount();
//重新整理介面
notifyDataSetChanged();
}
});
return view;
}
@Override
public View getChildView(final int groupPosition, final int childPosition, boolean isLastChild, final View convertView, ViewGroup parent) {
View view;
final ChildViewHolder holder;
if (convertView == null) {
view = inflater.inflate(R.layout.child_item2, null);
holder = new ChildViewHolder();
holder.iv = view.findViewById(R.id.iv);
holder.tvTitle = view.findViewById(R.id.tvTitle);
holder.tvSubhead = view.findViewById(R.id.tvSubhead);
holder.tvPrice = view.findViewById(R.id.tvPrice);
holder.cbChild = view.findViewById(R.id.cbChild);
holder.btDel = view.findViewById(R.id.btDel);
holder.tvNum = view.findViewById(R.id.tvNum);
holder.ivDel = view.findViewById(R.id.ivDel);
holder.ivAdd = view.findViewById(R.id.ivAdd);
view.setTag(holder);
} else {
view = convertView;
holder = (ChildViewHolder) view.getTag();
}
final ShopCartBean.DataBean.ListBean listBean = child.get(groupPosition).get(childPosition);
String images = listBean.getImages();
Glide.with(context).load(images.split("\\|")[0]).into(holder.iv);
holder.tvTitle.setText(listBean.getTitle());
holder.cbChild.setChecked(child.get(groupPosition).get(childPosition).isChecked());
holder.tvSubhead.setText(listBean.getSubhead());
holder.tvPrice.setText(listBean.getPrice() + "元");
holder.tvNum.setText(listBean.getCount() + "");
//給checkbox設定點選事件
holder.cbChild.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
//需要改變三個checkbox的狀態值
//1.二級列表的checkbox狀態值
listBean.setChecked(holder.cbChild.isChecked());
//2.一級列表的checkbox狀態值
group.get(groupPosition).setChecked(isAllChildCbChecked(groupPosition));
//3.全選的checkbox狀態值
((ShopCartActivity) context).setAllChecked(isAllGroupCbChecked());
//計算錢和數量並顯示
setPriceAndCount();
//重新整理介面
notifyDataSetChanged();
}
});
holder.ivAdd.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
//獲取目前顯示的值
int count = listBean.getCount();
count++;
//改變JavaBean裡的狀態值
listBean.setCount(count);
//計算錢和數量並顯示
setPriceAndCount();
//重新整理列表
notifyDataSetChanged();
}
});
holder.ivDel.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
//獲取目前顯示的值
int count = listBean.getCount();
if (count <= 1) {
count = 1;
} else {
count--;
}
//改變JavaBean裡的狀態值
listBean.setCount(count);
//計算錢和數量並顯示
setPriceAndCount();
//重新整理列表
notifyDataSetChanged();
}
});
holder.btDel.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
//其實就是刪除集合
List<ShopCartBean.DataBean.ListBean> listBeans = child.get(groupPosition);
if (listBeans.size() > 0) {
listBeans.remove(childPosition);
}
if (listBeans.size() == 0) {
child.remove(groupPosition);
group.remove(groupPosition);
}
//計算錢和數量並顯示
setPriceAndCount();
//改變全選狀態
((ShopCartActivity) context).setAllChecked(isAllGroupCbChecked());
//重新整理列表
notifyDataSetChanged();
}
});
return view;
}
@Override
public boolean isChildSelectable(int groupPosition, int childPosition) {
return false;
}
class GroupViewHolder {
TextView tv;
CheckBox cbGroup;
}
class ChildViewHolder {
ImageView iv;
TextView tvTitle;
TextView tvSubhead;
TextView tvPrice;
CheckBox cbChild;
Button btDel;
TextView tvNum;
ImageView ivDel;
ImageView ivAdd;
}
/**
* 設定一級列表對應的二級列表checkbox狀態
*
* @param groupPosition
* @param bool
*/
private void setChildrenCb(int groupPosition, boolean bool) {
List<ShopCartBean.DataBean.ListBean> listBeans = child.get(groupPosition);
for (int i = 0; i < listBeans.size(); i++) {
listBeans.get(i).setChecked(bool);
}
}
/**
* 判斷一級列表checkbox狀態
*
* @return
*/
private boolean isAllGroupCbChecked() {
if (group.size() == 0) {
return false;
}
for (int i = 0; i < group.size(); i++) {
if (!group.get(i).isChecked()) {
return false;
}
}
return true;
}
/**
* 判斷二級列表checkbox狀態
*
* @return
*/
private boolean isAllChildCbChecked(int groupPosition) {
List<ShopCartBean.DataBean.ListBean> listBeans = child.get(groupPosition);
for (int i = 0; i < listBeans.size(); i++) {
if (!listBeans.get(i).isChecked()) {
return false;
}
}
return true;
}
/**
* 設定錢和數量
*/
private void setPriceAndCount() {
((ShopCartActivity) context).setPriceAndCount(compute());
}
/**
* 計算錢和數量
*/
private PriceAndCount compute() {
double price = 0;
int count = 0;
for (int i = 0; i < group.size(); i++) {
List<ShopCartBean.DataBean.ListBean> listBeans = child.get(i);
for (int j = 0; j < listBeans.size(); j++) {
if (listBeans.get(j).isChecked()) {
price += listBeans.get(j).getPrice() * listBeans.get(j).getCount();
count += listBeans.get(j).getCount();
}
}
}
return new PriceAndCount(price, count);
}
/**
* 全選或者全不選
*
* @param bool
*/
public void AllOrNone(boolean bool) {
for (int i = 0; i < group.size(); i++) {
group.get(i).setChecked(bool);
setChildrenCb(i, bool);
}
setPriceAndCount();
notifyDataSetChanged();
}
}