购物车功能实现-优快云博客

本文链接：https://blog.youkuaiyun.com/lxrlxr888/article/details/78861421

public class ShowActivity extends AppCompatActivity implements ICart, IGeng, View.OnClickListener {

private ExpandableListView el;
private ExpandPre expandPre;
private GengPre gengPre;
private List<ExpandBean.DataBean> data;
private CheckBox check_all;
private TextView sum_price;
private TextView jiesuan;
private ProgressBar progressBar;
private ExpandAdapter adp;
List<ExpandBean.DataBean.ListBean> childlist = new ArrayList();
List<ExpandBean.DataBean.ListBean> groupchildlist = new ArrayList<>();
private boolean isck = false;
private Handler handler = new Handler() {
@Override
public void handleMessage(Message msg) {
super.handleMessage(msg);
if (msg.what == 0) {
//更新成功重新访问购物车，改变孩子的状态
expandPre.setPath("https://www.zhaoapi.cn/product/getCarts?uid=2775&token=C1264FBBC844ADB47FFAC4333C20E8EE");
//改变组的状态
isChildCheck();
//改变全选状态
boolean b = isAllChildCheck();
check_all.setChecked(b);
changePriceAndCount();
}
}
};

@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_show);
findViewById();
//查询购物车
expandPre = new ExpandPre(this);
gengPre = new GengPre(this);
//https://www.zhaoapi.cn/product/getCarts?uid=2775&token=C1264FBBC844ADB47FFAC4333C20E8EE
expandPre.setPath("https://www.zhaoapi.cn/product/getCarts?uid=2775&token=C1264FBBC844ADB47FFAC4333C20E8EE");
jiesuan.setOnClickListener(this);
check_all.setOnClickListener(this);
}

private void findViewById() {
progressBar = findViewById(R.id.pb);
jiesuan = findViewById(R.id.jiesuan);
el = findViewById(R.id.el);
check_all = findViewById(R.id.check_all);
sum_price = findViewById(R.id.sum_price);
}

@Override
public void success(ExpandBean expandBean) {
progressBar.setVisibility(View.INVISIBLE);
data = expandBean.getData();
isChildCheck();
boolean b = isAllChildCheck();
check_all.setChecked(b);
changePriceAndCount();
adp = new ExpandAdapter(ShowActivity.this, data);
el.setAdapter(adp);
for (int i = 0; i < data.size(); i++) {
el.expandGroup(i);
}
adp.setLinstner(new IPosition() {
@Override
public void getGroup(int group, Boolean b) {
count = 0;
size = 0;
childlist.clear();
List<ExpandBean.DataBean.ListBean> list = data.get(group).getList();
groupchildlist.addAll(list);
size = childlist.size();
OkHttp3Util.doGet("https://www.zhaoapi.cn/product/updateCarts?uid=2775&sellerid=" + list.get(count).getSellerid() + "&pid=" + list.get(count).getPid() + "&num=" + list.get(count).getNum() + "&selected=" + String.valueOf(b ? 1 : 0) + "&token=C1264FBBC844ADB47FFAC4333C20E8EE", new Callback() {
@Override
public void onFailure(Call call, IOException e) {

}

@Override
public void onResponse(Call call, Response response) throws IOException {
if (response.isSuccessful()) {
final String string = response.body().string();
CommonUtils.runOnUIThread(new Runnable() {
@Override
public void run() {
AddBean addBean = new Gson().fromJson(string, AddBean.class);
if ("success".equals(addBean.getMsg())) {
expandPre.setPath("https://www.zhaoapi.cn/product/getCarts?uid=2775&token=C1264FBBC844ADB47FFAC4333C20E8EE");
}
}
});
}
}
});
progressBar.setVisibility(View.VISIBLE);
}

@Override
public void getChild(int group, int child, Boolean b) {
List<ExpandBean.DataBean.ListBean> list = data.get(group).getList();
OkHttp3Util.doGet("https://www.zhaoapi.cn/product/updateCarts?uid=2775&sellerid=" + list.get(child).getSellerid() + "&pid=" + list.get(child).getPid() + "&num=" + list.get(child).getNum() + "&selected=" + String.valueOf(b ? 1 : 0) + "&token=C1264FBBC844ADB47FFAC4333C20E8EE", new Callback() {
@Override
public void onFailure(Call call, IOException e) {

}

@Override
public void onResponse(Call call, Response response) throws IOException {
if (response.isSuccessful()) {
final String string = response.body().string();
CommonUtils.runOnUIThread(new Runnable() {
@Override
public void run() {
AddBean addBean = new Gson().fromJson(string, AddBean.class);
if ("success".equals(addBean.getMsg())) {
expandPre.setPath("https://www.zhaoapi.cn/product/getCarts?uid=2775&token=C1264FBBC844ADB47FFAC4333C20E8EE");
}
}
});
}
}
});
progressBar.setVisibility(View.VISIBLE);
}

@Override
public void getJia(int group, int child, Boolean b) {
List<ExpandBean.DataBean.ListBean> list = data.get(group).getList();
OkHttp3Util.doGet("https://www.zhaoapi.cn/product/updateCarts?uid=2775&sellerid=" + list.get(child).getSellerid() + "&pid=" + list.get(child).getPid() + "&num=" + (list.get(child).getNum() + 1) + "&selected=" + String.valueOf(b ? 1 : 0) + "&token=C1264FBBC844ADB47FFAC4333C20E8EE", new Callback() {
@Override
public void onFailure(Call call, IOException e) {

}

@Override
public void onResponse(Call call, Response response) throws IOException {
if (response.isSuccessful()) {
final String string = response.body().string();
CommonUtils.runOnUIThread(new Runnable() {
@Override
public void run() {
AddBean addBean = new Gson().fromJson(string, AddBean.class);
if ("success".equals(addBean.getMsg())) {
expandPre.setPath("https://www.zhaoapi.cn/product/getCarts?uid=2775&token=C1264FBBC844ADB47FFAC4333C20E8EE");
}
}
});
}
}
});
progressBar.setVisibility(View.VISIBLE);
}

@Override
public void getJian(int group, int child, Boolean b) {
List<ExpandBean.DataBean.ListBean> list = data.get(group).getList();
OkHttp3Util.doGet("https://www.zhaoapi.cn/product/updateCarts?uid=2775&sellerid=" + list.get(child).getSellerid() + "&pid=" + list.get(child).getPid() + "&num=" + (list.get(child).getNum() - 1) + "&selected=" + String.valueOf(b ? 1 : 0) + "&token=C1264FBBC844ADB47FFAC4333C20E8EE", new Callback() {
@Override
public void onFailure(Call call, IOException e) {

}

@Override
public void onResponse(Call call, Response response) throws IOException {
if (response.isSuccessful()) {
final String string = response.body().string();
CommonUtils.runOnUIThread(new Runnable() {
@Override
public void run() {
AddBean addBean = new Gson().fromJson(string, AddBean.class);
if ("success".equals(addBean.getMsg())) {
expandPre.setPath("https://www.zhaoapi.cn/product/getCarts?uid=2775&token=C1264FBBC844ADB47FFAC4333C20E8EE");
}
}
});
}
}
});
progressBar.setVisibility(View.VISIBLE);
}
});

}

private void changePriceAndCount() {
int sum = 0;
int count = 0;
for (int i = 0; i < data.size(); i++) {
List<ExpandBean.DataBean.ListBean> list = data.get(i).getList();
for (int j = 0; j < list.size(); j++) {
if (list.get(j).getSelected() == 1) {
sum += list.get(j).getBargainPrice() * list.get(j).getNum();
count += list.get(j).getNum();
}
}
sum_price.setText(sum + "");
jiesuan.setText("去结算" + count);
}
}

private int count = 0;
private int size = 0;

@Override
public void geng(String msg) {
count++;
if (("success").equals(msg)) {
if (count == size) {
Message handlermsg = Message.obtain();
handlermsg.what = 0;
handler.sendMessage(handlermsg);
} else {
gengPre.setPath("https://www.zhaoapi.cn/product/updateCarts?uid=2775&sellerid=" + childlist.get(count).getSellerid() + "&pid=" + childlist.get(count).getPid() + "&num=" + childlist.get(count).getNum() + "&selected=" + String.valueOf(isck ? 1 : 0) + "&token=C1264FBBC844ADB47FFAC4333C20E8EE");
}

}

}

private boolean isAllChildCheck() {
for (int i = 0; i < data.size(); i++) {
List<ExpandBean.DataBean.ListBean> list = data.get(i).getList();
for (int j = 0; j < list.size(); j++) {
if (list.get(j).getSelected() == 0) {
return false;
}
}
}
return true;
}

private void isChildCheck() {
for (int i = 0; i < data.size(); i++) {
List<ExpandBean.DataBean.ListBean> list = data.get(i).getList();
if (childCheckAll(list)) {
data.get(i).setGroupCheck(true);
}
}
}

private boolean childCheckAll(List<ExpandBean.DataBean.ListBean> list) {
for (int i = 0; i < list.size(); i++) {
if (list.get(i).getSelected() == 0) {
return false;
}
}
return true;
}

@Override
public void onClick(View view) {
switch (view.getId()) {
case R.id.jiesuan:
Intent intent = new Intent(ShowActivity.this, DingDanAvtivity.class);
String sprice = sum_price.getText().toString();
Log.i("总价---",sprice);
intent.putExtra("sum", sprice);
startActivity(intent);
break;
case R.id.check_all:
isck = check_all.isChecked();
changeAllState(check_all.isChecked());
break;
}
}

private void changeAllState(boolean checked) {
count = 0;
size = 0;
childlist.clear();
for (int i = 0; i < data.size(); i++) {
childlist.addAll(data.get(i).getList());
}
size = childlist.size();
gengPre.setPath("https://www.zhaoapi.cn/product/updateCarts?uid=2775&sellerid=" + childlist.get(count).getSellerid() + "&pid=" + childlist.get(count).getPid() + "&num=" + childlist.get(count).getNum() + "&selected=" + String.valueOf(checked ? 1 : 0) + "&token=C1264FBBC844ADB47FFAC4333C20E8EE");
progressBar.setVisibility(View.VISIBLE);
}

}

public class ExpandAdapter extends BaseExpandableListAdapter {
private Context context;
private List<ExpandBean.DataBean> data;
private IPosition iPosition;

public ExpandAdapter(Context context, List<ExpandBean.DataBean> data) {
this.context = context;
this.data = data;
}

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

@Override
public int getChildrenCount(int i) {
return data.get(i).getList().size();
}

@Override
public Object getGroup(int i) {
return data.get(i);
}

@Override
public Object getChild(int i, int i1) {
return data.get(i).getList().get(i1);
}

@Override
public long getGroupId(int i) {
return i;
}

@Override
public long getChildId(int i, int i1) {
return i1;
}

@Override
public boolean hasStableIds() {
return true;
}

@Override
public View getGroupView(final int i, boolean b, View view, ViewGroup viewGroup) {
ExpandBean.DataBean dataBean = data.get(i);
GroupHolder groupHolder = null;
if (view == null) {
view = View.inflate(context, R.layout.group_item_layout, null);
groupHolder = new GroupHolder();
groupHolder.checkBox = view.findViewById(R.id.check_group);
groupHolder.textView = view.findViewById(R.id.text_group);
view.setTag(groupHolder);
} else {
groupHolder = (GroupHolder) view.getTag();
}
groupHolder.checkBox.setChecked(dataBean.isGroupCheck());
groupHolder.textView.setText(dataBean.getSellerName());

final GroupHolder finalGroupHolder = groupHolder;
groupHolder.checkBox.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
iPosition.getGroup(i, finalGroupHolder.checkBox.isChecked());
}
});
return view;
}

@Override
public View getChildView(final int i, final int i1, boolean b, View view, ViewGroup viewGroup) {
final ChildHolder childHolder;
if (view == null) {
view = View.inflate(context, R.layout.child_item_layout, null);
childHolder = new ChildHolder();
childHolder.check_child = view.findViewById(R.id.check_child);
childHolder.text_price = view.findViewById(R.id.text_price);
childHolder.text_jian = view.findViewById(R.id.text_jian);
childHolder.text_add = view.findViewById(R.id.text_add);
childHolder.text_num = view.findViewById(R.id.text_num);
childHolder.text_title = view.findViewById(R.id.text_title);
childHolder.image_good = view.findViewById(R.id.image_good);
view.setTag(childHolder);
} else {
childHolder = (ChildHolder) view.getTag();
}
ExpandBean.DataBean.ListBean listBean = data.get(i).getList().get(i1);
childHolder.check_child.setChecked(listBean.getSelected() == 1 ? true : false);
childHolder.text_price.setText(listBean.getPrice() + "");
childHolder.text_num.setText(listBean.getNum() + "");
childHolder.text_title.setText(listBean.getTitle());
Glide.with(context).load(listBean.getImages().split("\\|")[0]).into(childHolder.image_good);
childHolder.check_child.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
iPosition.getChild(i, i1,childHolder.check_child.isChecked());
}
});
childHolder.text_add.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
iPosition.getJia(i, i1,childHolder.check_child.isChecked());
}
});
childHolder.text_jian.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
iPosition.getJian(i, i1,childHolder.check_child.isChecked());
}
});
return view;
}

@Override
public boolean isChildSelectable(int i, int i1) {
return true;
}

public void setLinstner(IPosition iPosition) {
this.iPosition = iPosition;
}

class GroupHolder {
CheckBox checkBox;
TextView textView;
}

class ChildHolder {
CheckBox check_child;
ImageView image_good;
TextView text_title;
TextView text_price;
TextView text_jian;
TextView text_num;
TextView text_add;
}
}

public interface ICart {
void success(ExpandBean expandBean);
}

public interface IGeng {
void geng(String msg);
}

public interface IPosition {
void getGroup(int group,Boolean b);
void getChild(int group,int child,Boolean b);
void getJia(int group,int child,Boolean b);
void getJian(int group,int child,Boolean b);
}

group布局

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_gravity="center_vertical"
android:layout_width="match_parent"
android:paddingBottom="5dp"
android:paddingTop="5dp"
android:layout_height="40dp">

<CheckBox
android:id="@+id/check_group"
android:layout_width="25dp"
android:layout_height="25dp"
android:background="@drawable/check_box_selector"
android:button="@null" />

<TextView
android:id="@+id/text_group"
android:layout_width="wrap_content"
android:layout_height="wrap_content" />
<TextView
android:text=">"
android:layout_width="wrap_content"
android:layout_height="wrap_content" />
</LinearLayout>