仿京东购物车

//布局文件

<?xml version="1.0" encoding="utf-8"?> <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" android:layout_width="match_parent" android:layout_height="match_parent" android:orientation="horizontal"> <LinearLayout android:layout_width="0dp" android:layout_height="wrap_content" android:layout_weight="0.1" > <CheckBox android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_marginTop="30dp" android:id="@+id/cb" /> </LinearLayout> <LinearLayout android:layout_width="0dp" android:layout_height="wrap_content" android:layout_weight="0.5" android:orientation="horizontal" > <LinearLayout android:layout_width="wrap_content" android:layout_height="wrap_content" android:orientation="vertical" > <com.facebook.drawee.view.SimpleDraweeView android:layout_width="80dp" android:layout_height="80dp" android:id="@+id/sim" /> </LinearLayout> <LinearLayout android:layout_width="wrap_content" android:layout_height="wrap_content" android:orientation="vertical" > <TextView android:layout_width="wrap_content" android:layout_height="wrap_content" android:id="@+id/name" /> <TextView android:layout_width="wrap_content" android:layout_height="wrap_content" android:id="@+id/price" android:textColor="#ff00" /> </LinearLayout> </LinearLayout> <LinearLayout android:layout_width="0dp" android:layout_height="wrap_content" android:layout_weight="0.25" android:orientation="horizontal" > <Button android:layout_width="30dp" android:layout_marginTop="30dp" android:layout_height="wrap_content" android:text="-" android:id="@+id/jian" /> <TextView android:layout_width="30dp" android:layout_marginTop="30dp" android:textSize="20sp" android:layout_height="wrap_content" android:text="0" android:id="@+id/zong" /> <Button android:layout_width="30dp" android:layout_marginTop="30dp" android:layout_height="wrap_content" android:text="+" android:id="@+id/jia" /> </LinearLayout> <LinearLayout android:layout_width="0dp" android:layout_height="wrap_content" android:layout_weight="0.15" android:orientation="horizontal" > <Button android:layout_width="30dp" android:layout_height="30dp" android:id="@+id/shan" android:background="@drawable/rublish" android:layout_marginLeft="10dp" android:layout_marginTop="30dp" /> </LinearLayout> </LinearLayout>

//我这里用的MVP就不一一介绍了  我直接显示Api retrofit的使用

//查询 @GET( “getCarts”) Call<GoodsBean>doGet( @Query( “uid”) int uid, @Query( “source”) String source); //最主要更新 运用到加、减、全选 @GET( “updateCarts”)Call<UpBean>update( @Query( “uid”) int uid, @QueryMap Map<String,String> params); //删除 @GET( “product/deleteCart”)Call<DeleteBean> del( @Query( “uid”) String uid, @Query( “pid”) String pid);

//单例

public class HttpUtils { public static HttpUtils instance; private Retrofit retrofit; private HttpUtils(String uri){ retrofit = new Retrofit.Builder() .baseUrl(uri)  .addConverterFactory(GsonConverterFactory. create())     .build(); }

public static HttpUtils getInstance(String uri){ if( instance== ){ synchronized (HttpUtils. class){ if( == instance){   instance = new HttpUtils(uri);                             }                 }     }             return instance; }

public ApiServers getApi(){ return retrofit.create(ApiServers. class);                 } }

//主界面内容

public class MainActivity extends AppCompatActivity implements LogView { private Handler handler = new Handler(){ @Override public void handleMessage(Message msg) {             if (msg. what== 0){                 //价格和数量的Bean类 并且赋值                     CountPriceBean countAndPrice = (CountPriceBean) msg. obj;                          text_heji.setText( “￥”+countAndPrice.getPriceString());                          text_jiesuan.setText( “结算(“+countAndPrice.getCount()+ “)”);                                 }                         }                 }; String uri= “http://120.27.23.105/product/”; private ExpandableListView ex; private ChaXunAdapter adapter; private MyPresenterView myPresenterView; private CheckBox check_quanxuan; private TextView text_heji; private TextView text_jiesuan; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout. activity_main); ex = findViewById(R.id. expanded_view); check_quanxuan = findViewById(R.id. check_quanxuan); text_heji = findViewById(R.id. text_heji); text_jiesuan = findViewById(R.id. text_jiesuan);

//这里调用的p城的方法  并且把网址回去

myPresenterView = new MyPresenter( this); myPresenterView.setNet( uri);

//全选

check_quanxuan.setOnClickListener( new View.OnClickListener() { @Override public void onClick(View v) { adapter.isAllCheckChild( check_quanxuan.isChecked());                             }                 });         }

//这里是Logview自己的方法

@Override public void toBackView(List<GoodsBean.DataBean> data) {                 if (data != ) {              //默认二级条目全选       for ( int i= 0;i<data.size();i++){                      if (isChildCheck(i,data)){                             data.get(i).setGroup_check( true);                             }                        }

//全选图片默认选中

check_quanxuan.setChecked(isAllChildCheck(data));

//适配器

adapter = new ChaXunAdapter(MainActivity. this, data, myPresenterView, handler); ex.setAdapter( adapter); adapter.notifyDataSetChanged();

for ( int i = 0; i < data.size(); i++) {             //默认展开             ex.expandGroup(i);                         } //这里是适配器里面的总价方法 adapter.sendPriceAndCount();             } else { Toast. makeText(MainActivity. this, “购物车空，请添加购物车”, Toast. LENGTH_SHORT).show();         } }

//全选图片默认选中 private boolean isAllChildCheck(List<GoodsBean.DataBean> data) {                      for ( int i= 0;i<data.size();i++){                              if(!data.get(i).isGroup_check()){                                              return false;                                                                     }                                 }                                              return true;                                                                     } //默认二级条目全选 private boolean isChildCheck( int i, List<GoodsBean.DataBean> data) {                                 GoodsBean.DataBean dataBean = data.get(i);                             for ( int j= 0;j<dataBean.getList().size();j++){                                          if (dataBean.getList().get(j).getSelected()== 0){                                                      return false;                                             }                                                                 }                                              return true;                                                 }                                             }

//适配器

public class ChaXunAdapter extends BaseExpandableListAdapter { Context context; List<GoodsBean.DataBean> data; private int childIndex; private MyPresenterView myPresenterView; private Handler handler; private int allIndex; //适配的参数 public ChaXunAdapter(Context context, List<GoodsBean.DataBean> data, MyPresenterView myPresenterView, Handler handler) { this. context=context; this. data=data; this. myPresenterView = myPresenterView; this. handler = handler;      } @Override         public int getGroupCount() {                     return data.size();            } @Override          public int getChildrenCount( int groupPosition) {                          return data.get(groupPosition).getList().size();                 }             @Override         public Object getGroup( int groupPosition) {                 return data.get(groupPosition);             }             @Override          public Object getChild( int groupPosition, int childPosition) {              return data.get(groupPosition).getList().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;            } //二级 @Override public View getGroupView( int groupPosition, boolean isExpanded, View convertView, ViewGroup parent) { final GroupHolder holder; if (convertView== ){         convertView = View. inflate( context, R.layout. buju, );            holder = new GroupHolder();         holder. check = convertView.findViewById(R.id. check);         holder. title = convertView.findViewById(R.id. title); convertView.setTag(holder); } else{ holder = (GroupHolder) convertView.getTag(); }             //二级列表赋值             //多选框和名字             //获得二级条目的名字 final GoodsBean.DataBean dataBean = data.get(groupPosition); holder. check.setChecked( data.get(groupPosition).isGroup_check()); holder. title.setText( data.get(groupPosition).getSellerName());

            //多选框的点击事件

            //到下面与二级子条目想连接

//默认选中的话取消不了 holder. check.setOnClickListener( new View.OnClickListener() { @Override public void onClick(View v) {         //定义一个变量         childIndex = 0; //传入点击事件和二级条目的bean集合 childCheck( holder. check.isChecked(), dataBean);                 }             });      return convertView;             } //点击二级的多选框 //默认选中的取消不了 private void childCheck( final boolean checked, final GoodsBean.DataBean dataBean) { //更新 传入变量的值 GoodsBean.DataBean.ListBean listBean = dataBean.getList().get( childIndex);         Map<String,String> params = new HashMap<>();          params.put( “sellerid”, String. valueOf(listBean.getSellerid()));         params.put( “pid”, String. valueOf(listBean.getPid()));         params.put( “selected”, String. valueOf(checked ? 1 : 0));         params.put( “num”, String. valueOf(listBean.getNum()));         ApiServers api = HttpUtils. getInstance( “http://120.27.23.105/product/”).getApi();         api.update( 75,params).enqueue( new Callback<UpBean>() { @Override public void onResponse(Call<UpBean> call, Response<UpBean> response) { //点击更新条目进行京东数据更新         childIndex++;         if ( childIndex< dataBean.getList().size()){         childCheck( checked, dataBean); } else{         //传入到p城的网址         myPresenterView.setNet( “http://120.27.23.105/product/”);     } } @Override public void onFailure(Call<UpBean> call, Throwable t) { } }); } //二级子列表 @Override public View getChildView( int groupPosition, int childPosition, boolean isLastChild, View convertView, ViewGroup parent) { final MyHolder holder; if(convertView== ){ convertView = View. inflate( context, R.layout. bujuer, );         holder = new MyHolder();         holder. cb = convertView.findViewById(R.id. cb);         holder. jia =convertView.findViewById(R.id. jia);         holder. jian = convertView.findViewById(R.id. jian);         holder. name = convertView.findViewById(R.id. name);         holder. price = convertView.findViewById(R.id. price);         holder. zong = convertView.findViewById(R.id. zong);         holder. sim = convertView.findViewById(R.id. sim);         holder. text_delete = convertView.findViewById(R.id. text_delete);         convertView.setTag(holder); } else{         holder = (MyHolder) convertView.getTag();     }

//赋值 或许二级列表的子条目的数据

final GoodsBean.DataBean.ListBean listBean = data.get(groupPosition).getList().get(childPosition);         holder. cb.setChecked(listBean.getSelected()== 0 ? false: true);         String[] split = listBean.getImages().split( “ \\ |”);         Uri uri = Uri. parse(split[ 0]);         holder. sim.setImageURI(uri);         holder. name.setText(listBean.getTitle());         holder. price.setText( “￥”+ listBean.getBargainPrice());         holder. zong.setText(listBean.getNum()+ “”);

    //二级子条目的多选框点击事件 更新

//点击子条目的二级列表进行子条目所有全选 以及主页面的全选

 holder. cb.setOnClickListener( new View.OnClickListener() { @Override public void onClick(View view) { Map<String, String> params= new HashMap<>();         params.put( “sellerid”, String. valueOf( listBean.getSellerid()));         params.put( “pid”, String. valueOf( listBean.getPid()));         params.put( “selected”, String. valueOf( listBean.getSelected()== 0 ? 1 : 0));         params.put( “num”, String. valueOf( listBean.getNum()));         ApiServers api = HttpUtils. getInstance( “http://120.27.23.105/product/”).getApi();         api.update( 75,params).enqueue( new Callback<UpBean>() { @Override public void onResponse(Call<UpBean> call, Response<UpBean> response) {       if (response.isSuccessful()){         //调用网址 myPresenterView.setNet( “http://120.27.23.105/product/”);         } } @Override public void onFailure(Call<UpBean> call, Throwable t) { } }); } });

//加

holder. jia.setOnClickListener( new View.OnClickListener() { @Override     public void onClick(View view) {         Map<String, String> params= new HashMap<>();         params.put( “sellerid”, String. valueOf( listBean.getSellerid()));         params.put( “pid”, String. valueOf( listBean.getPid()));         params.put( “selected”, String. valueOf( listBean.getSelected()));         params.put( “num”, String. valueOf( listBean.getNum()+ 1));         ApiServers api = HttpUtils. getInstance( “http://120.27.23.105/product/”).getApi();         api.update( 75,params).enqueue( new Callback<UpBean>() { @Override     public void onResponse(Call<UpBean> call, Response<UpBean> response) {         if (response.isSuccessful()){         myPresenterView.setNet( “http://120.27.23.105/product/”);         } }

@Override public void onFailure(Call<UpBean> call, Throwable t) { } }); } });

//减

holder. jian.setOnClickListener( new View.OnClickListener() { @Override public void onClick(View view) { //判断如果减到一就不能再减了         int num= listBean.getNum();         if (num== 1){                       return;             }         Map<String, String> params= new HashMap<>();         params.put( “sellerid”, String. valueOf( listBean.getSellerid()));         params.put( “pid”, String. valueOf( listBean.getPid()));         params.put( “selected”, String. valueOf( listBean.getSelected()));         params.put( “num”, String. valueOf(num- 1));         ApiServers api = HttpUtils. getInstance( “http://120.27.23.105/product/”).getApi();         api.update( 75,params).enqueue( new Callback<UpBean>() { @Override public void onResponse(Call<UpBean> call, Response<UpBean> response) {         if (response.isSuccessful()){         myPresenterView.setNet( “http://120.27.23.105/product/”);         } } @Override public void onFailure(Call<UpBean> call, Throwable t) { } }); } });

//删除

holder. text_delete.setOnClickListener( new View.OnClickListener() {         @Override             public void onClick(View view) {                     String pid = String. valueOf( listBean.getPid());                       ApiServers api = HttpUtils. getInstance( “http://120.27.23.105/product/”).getApi();                         api.del( “75”,pid).enqueue( new Callback<DeleteBean>() {         @Override public void onResponse(Call<DeleteBean> call, Response<DeleteBean> response) {             if (response.isSuccessful()){                         myPresenterView.setNet( “http://120.27.23.105/product/”);             }       } } @Override public void onFailure(Call<DeleteBean> call, Throwable t) { } }); } });

return convertView; }

//总价 返回到主界面

public void sendPriceAndCount() { //价格和数量 double price= 0; int count= 0; for ( int i= 0;i< data.size();i++){             List<GoodsBean.DataBean.ListBean> listBeans = data.get(i).getList();                     for ( int j= 0;j<listBeans.size();j++){                                 if (listBeans.get(j).getSelected()== 1) {                                         //价格和数量相乘                                         price +=listBeans.get(j).getBargainPrice() * listBeans.get(j).getNum();                                         //数量                                         count +=listBeans.get(j).getNum();                                     }                         }             }                 //创建bean类 把总价和数量传入                 //到时候我们会返回到主界面进行handler赋值                 DecimalFormat decimalFormat = new DecimalFormat( “0.00”);                 String priceString = decimalFormat.format(price);                 CountPriceBean countPriceBean = new CountPriceBean(priceString, count);                 Message msg=Message. obtain();                 msg. what= 0; msg. obj=countPriceBean;                 handler.sendMessage(msg);     } @Override public boolean isChildSelectable( int groupPosition, int childPosition) {             return false; }

//主界面全选 添加到集合里面 返回到主界面

public void isAllCheckChild( boolean checked) {         List<GoodsBean.DataBean.ListBean> allList = new ArrayList<>();                 for ( int i= 0;i< data.size();i++){                         GoodsBean.DataBean dataBean = data.get(i);                 for ( int j= 0;j<dataBean.getList().size();j++){                          GoodsBean.DataBean.ListBean listBean = dataBean.getList().get(j);                         allList.add(listBean);                     }         }             allIndex = 0;             updateAllChildCheck(checked,allList); }

//更新

private void updateAllChildCheck( final boolean checked, final List<GoodsBean.DataBean.ListBean> allList) {         final GoodsBean.DataBean.ListBean listBean = allList.get( allIndex);                 Map<String,String> params = new HashMap<>();                     //查询                     params.put( “sellerid”, String. valueOf(listBean.getSellerid()));                     params.put( “pid”, String. valueOf(listBean.getPid()));                     params.put( “selected”, String. valueOf(checked ? 1 : 0));                     params.put( “num”, String. valueOf(listBean.getNum()));                     ApiServers api = HttpUtils. getInstance( “http://120.27.23.105/product/”).getApi();                     api.update( 75,params).enqueue( new Callback<UpBean>() { @Override                 public void onResponse(Call<UpBean> call, Response<UpBean> response) {                         allIndex++;                 if ( allIndex< allList.size()){ updateAllChildCheck( checked, allList);         } else{                 myPresenterView.setNet( “http://120.27.23.105/product/”);         } } @Override public void onFailure(Call<UpBean> call, Throwable t) { } }); } class MyHolder{ CheckBox cb; TextView name; TextView price; TextView zong; TextView jia, jian; TextView text_delete; SimpleDraweeView sim; } class GroupHolder{ CheckBox check; TextView title;         } }

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