效果图:
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在你敲代码时不要忘记导依赖:
compile 'com.squareup.okhttp3:okhttp:3.9.0' compile 'com.squareup.okhttp3:logging-interceptor:3.9.0' compile 'com.google.code.gson:gson:2.8.2' compile 'com.nostra13.universalimageloader:universal-image-loader:1.9.5' compile 'org.greenrobot:eventbus:3.1.1'
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还有网络权限:
android:name="android.permission.INTERNET">
敲代码时首先把包分清,分别有:
adapter、bean、eventbusevent、model、net、presenter、view这些包,主页面MainActivity放在view里面。
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adapter:包里面创建一个MyAdapter类
public class MyAdapter extends BaseExpandableListAdapter { private Context context; private ListgroupList; private List > childList; private final LayoutInflater inflater; public MyAdapter(Context context, List
groupList, List > childList) { this.context = context; this.groupList = groupList; this.childList = childList; inflater = LayoutInflater.from(context); } @Override public int getGroupCount() { return groupList.size(); } @Override public int getChildrenCount(int groupPosition) { return childList.get(groupPosition).size(); } @Override public Object getGroup(int groupPosition) { return groupList.get(groupPosition); } @Override public Object getChild(int groupPosition, int childPosition) { return childList.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) { holder = new GroupViewHolder(); view = inflater.inflate(R.layout.item_parent_market, null); holder.cbGroup = view.findViewById(R.id.cb_parent); holder.tv_number = view.findViewById(R.id.tv_number); view.setTag(holder); } else { view = convertView; holder = (GroupViewHolder) view.getTag(); } final GoosBean.DataBean dataBean = groupList.get(groupPosition); holder.cbGroup.setChecked(dataBean.isChecked()); holder.tv_number.setText(dataBean.getTitle()); //一级checkbox holder.cbGroup.setOnClickListener(new View.OnClickListener() { @Override public void onClick(View v) { dataBean.setChecked(holder.cbGroup.isChecked()); changeChildCbState(groupPosition, holder.cbGroup.isChecked()); EventBus.getDefault().post(compute()); changeAllCbState(isAllGroupCbSelected()); notifyDataSetChanged(); } }); return view; } @Override public View getChildView(final int groupPosition, final int childPosition, boolean isLastChild, View convertView, ViewGroup parent) { View view; final ChildViewHolder holder; if (convertView == null) { holder = new ChildViewHolder(); view = inflater.inflate(R.layout.item_child_market, null); holder.cbChild = view.findViewById(R.id.cb_child); holder.tv_tel = view.findViewById(R.id.tv_tel); holder.tv_content = view.findViewById(R.id.tv_content); holder.tv_time = view.findViewById(R.id.tv_time); holder.tv_price = view.findViewById(R.id.tv_pri); holder.tv_del = view.findViewById(R.id.tv_del); holder.iv_add = view.findViewById(R.id.iv_add); holder.iv_del = view.findViewById(R.id.iv_del); holder.tv_num = view.findViewById(R.id.tv_num); view.setTag(holder); } else { view = convertView; holder = (ChildViewHolder) view.getTag(); } final GoosBean.DataBean.DatasBean datasBean = childList.get(groupPosition).get(childPosition); holder.cbChild.setChecked(datasBean.isChecked()); holder.tv_tel.setText(datasBean.getType_name()); holder.tv_content.setText(datasBean.getMsg()); holder.tv_time.setText(datasBean.getAdd_time()); holder.tv_price.setText(datasBean.getPrice() + ""); holder.tv_num.setText(datasBean.getNum() + ""); //二级checkbox holder.cbChild.setOnClickListener(new View.OnClickListener() { @Override public void onClick(View v) { //设置该条目对象里的checked属性值 datasBean.setChecked(holder.cbChild.isChecked()); PriceAndCountEvent priceAndCountEvent = compute(); EventBus.getDefault().post(priceAndCountEvent); if (holder.cbChild.isChecked()) { //当前checkbox是选中状态 if (isAllChildCbSelected(groupPosition)) { changGroupCbState(groupPosition, true); changeAllCbState(isAllGroupCbSelected()); } } else { changGroupCbState(groupPosition, false); changeAllCbState(isAllGroupCbSelected()); } notifyDataSetChanged(); } }); //加号 holder.iv_add.setOnClickListener(new View.OnClickListener() { @Override public void onClick(View v) { int num = datasBean.getNum(); holder.tv_num.setText(++num + ""); datasBean.setNum(num); if (holder.cbChild.isChecked()) { PriceAndCountEvent priceAndCountEvent = compute(); EventBus.getDefault().post(priceAndCountEvent); } } }); //减号 holder.iv_del.setOnClickListener(new View.OnClickListener() { @Override public void onClick(View v) { int num = datasBean.getNum(); if (num == 1) { return; } holder.tv_num.setText(--num + ""); datasBean.setNum(num); if (holder.cbChild.isChecked()) { PriceAndCountEvent priceAndCountEvent = compute(); EventBus.getDefault().post(priceAndCountEvent); } } }); //删除 holder.tv_del.setOnClickListener(new View.OnClickListener() { @Override public void onClick(View v) { List
datasBeen = childList.get(groupPosition); GoosBean.DataBean.DatasBean remove = datasBeen.remove(childPosition); if (datasBeen.size() == 0) { childList.remove(groupPosition); groupList.remove(groupPosition); } EventBus.getDefault().post(compute()); notifyDataSetChanged(); } }); return view; } @Override public boolean isChildSelectable(int groupPosition, int childPosition) { return true; } class GroupViewHolder { CheckBox cbGroup; TextView tv_number; } class ChildViewHolder { CheckBox cbChild; TextView tv_tel; TextView tv_content; TextView tv_time; TextView tv_price; TextView tv_del; ImageView iv_del; ImageView iv_add; TextView tv_num; } /** * 改变全选的状态 * * @param flag */ private void changeAllCbState(boolean flag) { MessageEvent messageEvent = new MessageEvent(); messageEvent.setChecked(flag); EventBus.getDefault().post(messageEvent); } /** * 改变一级列表checkbox状态 * * @param groupPosition */ private void changGroupCbState(int groupPosition, boolean flag) { GoosBean.DataBean dataBean = groupList.get(groupPosition); dataBean.setChecked(flag); } /** * 改变二级列表checkbox状态 * * @param groupPosition * @param flag */ private void changeChildCbState(int groupPosition, boolean flag) { List datasBeen = childList.get(groupPosition); for (int i = 0; i < datasBeen.size(); i++) { GoosBean.DataBean.DatasBean datasBean = datasBeen.get(i); datasBean.setChecked(flag); } } /** * 判断一级列表是否全部选中 * * @return */ private boolean isAllGroupCbSelected() { for (int i = 0; i < groupList.size(); i++) { GoosBean.DataBean dataBean = groupList.get(i); if (!dataBean.isChecked()) { return false; } } return true; } /** * 判断二级列表是否全部选中 * * @param groupPosition * @return */ private boolean isAllChildCbSelected(int groupPosition) { List datasBeen = childList.get(groupPosition); for (int i = 0; i < datasBeen.size(); i++) { GoosBean.DataBean.DatasBean datasBean = datasBeen.get(i); if (!datasBean.isChecked()) { return false; } } return true; } /** * 计算列表中,选中的钱和数量 */ private PriceAndCountEvent compute() { int count = 0; int price = 0; for (int i = 0; i < childList.size(); i++) { List datasBeen = childList.get(i); for (int j = 0; j < datasBeen.size(); j++) { GoosBean.DataBean.DatasBean datasBean = datasBeen.get(j); if (datasBean.isChecked()) { price += datasBean.getNum() * datasBean.getPrice(); count += datasBean.getNum(); } } } PriceAndCountEvent priceAndCountEvent = new PriceAndCountEvent(); priceAndCountEvent.setCount(count); priceAndCountEvent.setPrice(price); return priceAndCountEvent; } /** * 设置全选、反选 * * @param flag */ public void changeAllListCbState(boolean flag) { for (int i = 0; i < groupList.size(); i++) { changGroupCbState(i, flag); changeChildCbState(i, flag); } EventBus.getDefault().post(compute()); notifyDataSetChanged(); } }
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bean包里面创建一个GoosBean
public class GoosBean { /** * code : 200 * data : [{"datas":[{"add_time":"2016-12-10 14:54:58","cart_id":"445162","house_id":"1","msg":"购买渠道:大陆国行","price":500,"type_name":"苹果 iPhone 6(白金色)","type_sn_id":"ggh"},{"add_time":"2016-12-10 14:55:18","cart_id":"445163","house_id":"1","msg":"购买渠道:水货无锁","price":1000,"type_name":"苹果 iPhone 7 (亮黑色)","type_sn_id":"tgg"}],"title":"苹果","title_id":"59280"},{"datas":[{"add_time":"2016-12-10 14:54:58","cart_id":"445162","house_id":"1","msg":"边框背板:全新未使用","price":50,"type_name":"小米4s (白金色)","type_sn_id":"ggh"},{"add_time":"2016-12-10 14:55:18","cart_id":"445163","house_id":"1","msg":"屏幕性能:色差/亮点/轻微发黄","price":100,"type_name":"小米5s (亮黑色)","type_sn_id":"tgg"}],"title":"小米","title_id":"59279"},{"datas":[{"add_time":"2016-12-10 14:54:58","cart_id":"445162","house_id":"1","msg":"边框背板:全新未使用","price":50,"type_name":"三星 (白金色)","type_sn_id":"ggh"},{"add_time":"2016-12-10 14:55:18","cart_id":"445163","house_id":"1","msg":"屏幕性能:色差/亮点/轻微发黄","price":100,"type_name":"三星 (亮黑色)","type_sn_id":"tgg"}],"title":"三星","title_id":"59279"},{"datas":[{"add_time":"2016-12-10 14:54:58","cart_id":"445162","house_id":"1","msg":"边框背板:全新未使用","price":50,"type_name":"华为 (白金色)","type_sn_id":"ggh"},{"add_time":"2016-12-10 14:55:18","cart_id":"445163","house_id":"1","msg":"屏幕性能:色差/亮点/轻微发黄","price":100,"type_name":"华为 (亮黑色)","type_sn_id":"tgg"},{"add_time":"2016-12-10 4:55:28","cart_id":"445164","house_id":"1","msg":"屏幕性能:色差/亮点/轻微发黄","price":150,"type_name":"华为 (纯黑色)","type_sn_id":"hgg"}],"title":"华为","title_id":"59279"}] * flag : Success * msg : 描述 */ private String code; private String flag; private String msg; private Listdata; public String getCode() { return code; } public void setCode(String code) { this.code = code; } public String getFlag() { return flag; } public void setFlag(String flag) { this.flag = flag; } public String getMsg() { return msg; } public void setMsg(String msg) { this.msg = msg; } public List getData() { return data; } public void setData(List data) { this.data = data; } public static class DataBean { /** * datas : [{"add_time":"2016-12-10 14:54:58","cart_id":"445162","house_id":"1","msg":"购买渠道:大陆国行","price":500,"type_name":"苹果 iPhone 6(白金色)","type_sn_id":"ggh"},{"add_time":"2016-12-10 14:55:18","cart_id":"445163","house_id":"1","msg":"购买渠道:水货无锁","price":1000,"type_name":"苹果 iPhone 7 (亮黑色)","type_sn_id":"tgg"}] * title : 苹果 * title_id : 59280 */ private boolean checked; private String title; private String title_id; private List datas; public boolean isChecked() { return checked; } public void setChecked(boolean checked) { this.checked = checked; } public String getTitle() { return title; } public void setTitle(String title) { this.title = title; } public String getTitle_id() { return title_id; } public void setTitle_id(String title_id) { this.title_id = title_id; } public List getDatas() { return datas; } public void setDatas(List datas) { this.datas = datas; } public static class DatasBean { /** * add_time : 2016-12-10 14:54:58 * cart_id : 445162 * house_id : 1 * msg : 购买渠道:大陆国行 * price : 500 * type_name : 苹果 iPhone 6(白金色) * type_sn_id : ggh */ private boolean checked; private int num = 1; private String add_time; private String cart_id; private String house_id; private String msg; private int price; private String type_name; private String type_sn_id; public int getNum() { return num; } public void setNum(int num) { this.num = num; } public boolean isChecked() { return checked; } public void setChecked(boolean checked) { this.checked = checked; } public String getAdd_time() { return add_time; } public void setAdd_time(String add_time) { this.add_time = add_time; } public String getCart_id() { return cart_id; } public void setCart_id(String cart_id) { this.cart_id = cart_id; } public String getHouse_id() { return house_id; } public void setHouse_id(String house_id) { this.house_id = house_id; } public String getMsg() { return msg; } public void setMsg(String msg) { this.msg = msg; } public int getPrice() { return price; } public void setPrice(int price) { this.price = price; } public String getType_name() { return type_name; } public void setType_name(String type_name) { this.type_name = type_name; } public String getType_sn_id() { return type_sn_id; } public void setType_sn_id(String type_sn_id) { this.type_sn_id = type_sn_id; } } } }
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eventbusevent包里面创建二两个类,一个是MessageEvent、PriceAndCountEvent
public class MessageEvent { private boolean checked; public boolean isChecked() { return checked; } public void setChecked(boolean checked) { this.checked = checked; } }
public class PriceAndCountEvent { private int price; private int count; public int getPrice() { return price; } public void setPrice(int price) { this.price = price; } public int getCount() { return count; } public void setCount(int count) { this.count = count; } }
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model包创建二两个类,一个是IMainModel接口,MainModel
public interface IMainModel { public void getGoods(OnNetListeneronNetListener); }
public class MainModel implements IMainModel { private Handler handler = new Handler(Looper.getMainLooper()); public void getGoods(final OnNetListeneronNetListener) { HttpUtils.getHttpUtils().doGet(Api.url, 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 GoosBean goosBean = new Gson().fromJson(string, GoosBean.class); handler.post(new Runnable() { @Override public void run() { onNetListener.onSuccess(goosBean); } }); } }); } }
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net包里面创建三个类,第一个类 Api 接口是 获取网络数据的,第二类 HttpUtils 是请求,第三个类OnNetListener接口。
public interface Api { //网上获取数据 public static final String url = "http://result.eolinker.com/iYXEPGn4e9c6dafce6e5cdd23287d2bb136ee7e9194d3e9?uri=evaluation"; }
public class HttpUtils { private static volatile HttpUtils httpUtils; private final OkHttpClient client; private HttpUtils() { HttpLoggingInterceptor logging = new HttpLoggingInterceptor(); logging.setLevel(HttpLoggingInterceptor.Level.BODY); client = new OkHttpClient.Builder() .addInterceptor(logging) .build(); } public static HttpUtils getHttpUtils() { if (httpUtils == null) { synchronized (HttpUtils.class) { if (httpUtils == null) { httpUtils = new HttpUtils(); } } } return httpUtils; } /** * GET请求 * * @param url * @param callback */ public void doGet(String url, Callback callback) { Request request = new Request.Builder().url(url).build(); client.newCall(request).enqueue(callback); } }
public interface OnNetListener<T> { public void onSuccess(T t); public void onFailure(Exception e); }
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Presenter包里面创建一个MainPresenter类
public class MainPresenter { private final IMainModel imainModel; private final IMainActivity iMainActivity; public MainPresenter(MainActivity iMainActivity) { this.iMainActivity = iMainActivity; imainModel = new MainModel(); } public void getGoods() { imainModel.getGoods(new OnNetListener() { @Override public void onSuccess(GoosBean goosBean) { //List groupList, List List> childList
dataBean = goosBean.getData(); List > childList = new ArrayList
>(); for (int i = 0; i < dataBean.size(); i++) { List
datas = dataBean.get(i).getDatas(); childList.add(datas); } iMainActivity.showList(dataBean, childList); } @Override public void onFailure(Exception e) { } }); } }
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View包里面创建二个类,第一个是IMainActivity接口,第二个就是MainActivity主页面
public interface IMainActivity { //view接口进行调用 public void showList (ListgroupList, List >childList); }
//主页面,调用IMainActivity的接口 public class MainActivity extends AppCompatActivity implements IMainActivity { private ExpandableListView mElv; private CheckBox mCheckbox2; /** * 0 */ private TextView mTvPrice; /** * 结算(0) */ private TextView mTvNum; private MyAdapter adapter; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_main); EventBus.getDefault().register(this); //方法 initView(); new MainPresenter(this).getGoods(); mCheckbox2.setOnClickListener(new View.OnClickListener() { @Override public void onClick(View v) { adapter.changeAllListCbState(mCheckbox2.isChecked()); } }); } @Override protected void onDestroy() { super.onDestroy(); EventBus.getDefault().unregister(this); } private void initView() { mElv = (ExpandableListView) findViewById(R.id.elv); mCheckbox2 = (CheckBox) findViewById(R.id.checkbox2); mTvPrice = (TextView) findViewById(R.id.tv_price); mTvNum = (TextView) findViewById(R.id.tv_num); } @Override public void showList(ListgroupList, List > childList) { adapter = new MyAdapter(this, groupList, childList); mElv.setAdapter(adapter); mElv.setGroupIndicator(null); //默认让其全部展开 for (int i = 0; i < groupList.size(); i++) { mElv.expandGroup(i); } } @Subscribe public void onMessageEvent(MessageEvent event) { mCheckbox2.setChecked(event.isChecked()); } @Subscribe public void onMessageEvent(PriceAndCountEvent event) { mTvNum.setText("结算(" + event.getCount() + ")"); mTvPrice.setText(event.getPrice() + ""); } }
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布局页面:
activity_main:
xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical">
android:layout_width="match_parent"
android:layout_height="40dp"
android:background="#990000ff"
android:gravity="center"
android:text="购物车"
android:textColor="#ff3660"
android:textSize="25sp" />
android:id="@+id/elv"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:layout_weight="1" />
android:layout_width="match_parent"
android:layout_height="50dp"
android:layout_alignParentBottom="true"
android:background="@android:color/white"
android:gravity="center_vertical">
android:id="@+id/checkbox2"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_centerVertical="true"
android:layout_marginLeft="10dp"
android:focusable="false" />
android:layout_width="wrap_content"
android:layout_height="50dp"
android:layout_centerVertical="true"
android:layout_marginLeft="10dp"
android:layout_toRightOf="@+id/checkbox2"
android:gravity="center_vertical"
android:text="全选"
android:textSize="20sp" />
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentRight="true"
android:orientation="horizontal">
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginLeft="10dp"
android:text="合计 :" />
android:id="@+id/tv_price"
android:layout_width="wrap_content"
android:layout_height="50dp"
android:layout_marginLeft="10dp"
android:paddingRight="10dp"
android:text="0"
android:textColor="@android:color/holo_red_light" />
android:id="@+id/tv_num"
android:layout_width="wrap_content"
android:layout_height="50dp"
android:background="@android:color/holo_red_dark"
android:gravity="center"
android:padding="10dp"
android:text="结算(0)"
android:textColor="@android:color/white" />
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item_child_market:
xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="horizontal">
android:id="@+id/cb_child"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginBottom="30dp"
android:layout_marginLeft="40dp"
android:layout_marginTop="15dp"
android:focusable="false" />
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:orientation="vertical">
android:id="@+id/tv_tel"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginLeft="20dp"
android:text="iphone6" />
android:id="@+id/tv_content"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginLeft="20dp"
android:text="商品店名" />
android:id="@+id/tv_time"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginLeft="20dp"
android:text="2016-12-10" />
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_weight="1"
android:orientation="vertical">
android:id="@+id/tv_pri"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="¥3000.00" />
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:gravity="center_vertical">
android:id="@+id/iv_del"
android:layout_width="20dp"
android:layout_height="20dp"
android:src="@drawable/shopcart_minus_grey" />
android:id="@+id/tv_num"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginLeft="5dp"
android:background="@drawable/shopcart_add_btn"
android:paddingBottom="2dp"
android:paddingLeft="20dp"
android:paddingRight="20dp"
android:paddingTop="2dp"
android:text="1" />
android:id="@+id/iv_add"
android:layout_width="20dp"
android:layout_height="20dp"
android:layout_marginLeft="5dp"
android:src="@drawable/shopcart_add_red" />
android:id="@+id/tv_del"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="删除" />
==================================================================
item_parent_market:
xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="horizontal">
android:id="@+id/cb_parent"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginBottom="30dp"
android:layout_marginLeft="20dp"
android:layout_marginTop="30dp"
android:focusable="false" />
android:id="@+id/tv_sign"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginLeft="20dp"
android:text="标记" />
android:id="@+id/tv_number"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginLeft="20dp"
android:text="12345678" />