andriod——简单实现二级购物车
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compile 'com.squareup.picasso:picasso:2.5.1'//ChildBeanpublic class ChildBean { private String title; private String price; private String path; private Boolean isSelected=false; private int num; public ChildBean() { } public ChildBean(String title, String price, String path, Boolean isSelected, int num) { this.title = title; this.price = price; this.path = path; this.isSelected = isSelected; this.num = num; } public String getTitle() { return title; } public void setTitle(String title) { this.title = title; } public String getPrice() { return price; } public void setPrice(String price) { this.price = price; } public String getPath() { return path; } public void setPath(String path) { this.path = path; } public Boolean getSelected() { return isSelected; } public void setSelected(Boolean selected) { isSelected = selected; } public int getNum() { return num; } public void setNum(int num) { this.num = num; }}
/bean-GroupBeanpublic class GroupBean { public String group_name; public Boolean isSelected=false; public GroupBean() { } public GroupBean(String group_name, Boolean isSelected) { this.group_name = group_name; this.isSelected = isSelected; } public String getGroup_name() { return group_name; } public void setGroup_name(String group_name) { this.group_name = group_name; } public Boolean getSelected() { return isSelected; } public void setSelected(Boolean selected) { isSelected = selected; }}//utils-CartUtils//CartUtilspublic class CartUtils { private static ElvAdapter adapter; public static void setCartData(Context context, final List<GroupBean> flist, final List<List<ChildBean>> slist, ExpandableListView elv, final CheckBox all, final TextView all_count, final TextView all_money){ all_count.setBackgroundResource(R.color.count); all_money.setBackgroundResource(R.color.money); all_count.setTextColor(Color.WHITE); all_money.setTextColor(Color.WHITE); elv.setGroupIndicator(null); adapter = new ElvAdapter(flist,slist,context,all,all_count,all_money); elv.setAdapter(adapter); for (int i=0;i<flist.size();i++){ elv.expandGroup(i); } all.setOnClickListener(new View.OnClickListener() { @Override public void onClick(View v) { for (int i=0;i<flist.size();i++){ flist.get(i).setSelected(all.isChecked()); for (int j=0;j<slist.get(i).size();j++){ slist.get(i).get(j).setSelected(all.isChecked()); } } adapter.notifyDataSetChanged(); checkNum(flist,slist,all_count,all_money); } }); } public static void checkNum(List<GroupBean> flist, List<List<ChildBean>> slist, TextView count, TextView money){ int all_count=0; int all_money = 0; for (int i=0;i<flist.size();i++){ for (int j=0;j<slist.get(i).size();j++) { if(slist.get(i).get(j).getSelected()){ all_count += slist.get(i).get(j).getNum(); int v = (int) (Double.parseDouble(slist.get(i).get(j).getPrice())*slist.get(i).get(j).getNum()); all_money += v; } } } count.setText("总计:"+all_count); money.setText("计算:"+all_money); } static class ElvAdapter extends BaseExpandableListAdapter{ List<GroupBean> flist; List<List<ChildBean>> slist; Context context; CheckBox all; TextView all_count; TextView all_money; public ElvAdapter(List<GroupBean> flist, List<List<ChildBean>> slist,Context context,CheckBox all,TextView all_count,TextView all_money) { this.flist = flist; this.slist = slist; this.context=context; this.all=all; this.all_count=all_count; this.all_money=all_money; } @Override public int getGroupCount() { return flist.size(); } @Override public int getChildrenCount(int groupPosition) { return slist.get(groupPosition).size(); } @Override public Object getGroup(int groupPosition) { return flist.get(groupPosition); } @Override public Object getChild(int groupPosition, int childPosition) { return slist.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 true; } @Override public View getGroupView(final int groupPosition, boolean isExpanded, View convertView, ViewGroup parent) { View view=null; GroupHolder holder=null; if(convertView==null){ convertView=View.inflate(context, R.layout.group,null); view=convertView; holder=new GroupHolder(); holder.group=(CheckBox)view.findViewById(R.id.group); holder.group_name=(TextView) view.findViewById(R.id.group_name); convertView.setTag(holder); }else{ view=convertView; holder= (GroupHolder) convertView.getTag(); } holder.group_name.setText(flist.get(groupPosition).getGroup_name()); holder.group.setChecked(flist.get(groupPosition).getSelected()); holder.group.setOnClickListener(new View.OnClickListener() { @Override public void onClick(View v) { if(flist.get(groupPosition).getSelected()){ flist.get(groupPosition).setSelected(false); all.setChecked(false); for (int i=0;i<slist.get(groupPosition).size();i++){ slist.get(groupPosition).get(i).setSelected(false); } }else{ int count=0; flist.get(groupPosition).setSelected(true); for (int i=0;i<slist.get(groupPosition).size();i++){ slist.get(groupPosition).get(i).setSelected(true); } for (int i=0;i<flist.size();i++){ if(flist.get(i).getSelected()){ count++; } } if(count==flist.size()){ all.setChecked(true); } } checkNum(flist,slist,all_count,all_money); notifyDataSetChanged(); } }); return view; } class GroupHolder{ CheckBox group; TextView group_name; } class ChildHolder{ CheckBox child; TextView title; ImageView image; TextView price; Jiajianqi amount_view; } @Override public View getChildView(final int groupPosition, final int childPosition, boolean isLastChild, View convertView, ViewGroup parent) { View view=null; ChildHolder holder=null; if(convertView==null){ convertView=View.inflate(context,R.layout.child,null); view=convertView; holder=new ChildHolder(); holder.child=(CheckBox)view.findViewById(R.id.child); holder.title=(TextView) view.findViewById(R.id.title); holder.price=(TextView)view.findViewById(R.id.price); holder.image=(ImageView)view.findViewById(R.id.image); holder.amount_view=(Jiajianqi)view.findViewById(R.id.amount_view); convertView.setTag(holder); }else{ view=convertView; holder= (ChildHolder) convertView.getTag(); } Picasso.with(context).load(slist.get(groupPosition).get(childPosition).getPath()).into(holder.image); holder.title.setText(slist.get(groupPosition).get(childPosition).getTitle()); holder.price.setText("￥"+slist.get(groupPosition).get(childPosition).getPrice()); holder.child.setChecked(slist.get(groupPosition).get(childPosition).getSelected()); final ChildHolder finalHolder = holder; holder.amount_view.setGoods_storage(100); holder.amount_view.setAmount(slist.get(groupPosition).get(childPosition).getNum()); holder.amount_view.setOnAmountChangeListener(new Jiajianqi.OnAmountChangeListener() { @Override public void onAmountChange(View view, int amount) { slist.get(groupPosition).get(childPosition).setNum(amount); checkNum(flist,slist,all_count,all_money); } }); holder.child.setOnClickListener(new View.OnClickListener() { @Override public void onClick(View v) { if(slist.get(groupPosition).get(childPosition).getSelected()){ slist.get(groupPosition).get(childPosition).setSelected(false); flist.get(groupPosition).setSelected(false); all.setChecked(false); }else{ int fcount=0; int scount=0; slist.get(groupPosition).get(childPosition).setSelected(true); for (int i=0;i<slist.get(groupPosition).size();i++){ if(slist.get(groupPosition).get(i).getSelected()){ scount++; } } if(scount==slist.get(groupPosition).size()){ flist.get(groupPosition).setSelected(true); } for (int i=0;i<flist.size();i++){ if(flist.get(i).getSelected()){ fcount++; } } if(fcount==flist.size()){ all.setChecked(true); } } checkNum(flist,slist,all_count,all_money); notifyDataSetChanged(); } }); return view; } @Override public boolean isChildSelectable(int groupPosition, int childPosition) { return true; } }}//Jiajianqipublic class Jiajianqi extends LinearLayout implements View.OnClickListener, TextWatcher { private static final String TAG = "AmountView"; private int amount = 1; //购买数量 private int goods_storage = 1; //商品库存 private OnAmountChangeListener mListener; private EditText etAmount; private Button btnDecrease; private Button btnIncrease; public Jiajianqi(Context context) { this(context, null); } public Jiajianqi(Context context, AttributeSet attrs) { super(context, attrs); LayoutInflater.from(context).inflate(R.layout.view_amount, this); etAmount = (EditText) findViewById(R.id.etAmount); btnDecrease = (Button) findViewById(R.id.btnDecrease); btnIncrease = (Button) findViewById(R.id.btnIncrease); btnDecrease.setOnClickListener(this); btnIncrease.setOnClickListener(this); etAmount.addTextChangedListener(this); TypedArray obtainStyledAttributes = getContext().obtainStyledAttributes(attrs, R.styleable.AmountView); int btnWidth = obtainStyledAttributes.getDimensionPixelSize(R.styleable.AmountView_btnWidth, LayoutParams.WRAP_CONTENT); int tvWidth = obtainStyledAttributes.getDimensionPixelSize(R.styleable.AmountView_tvWidth, 80); int tvTextSize = obtainStyledAttributes.getDimensionPixelSize(R.styleable.AmountView_tvTextSize, 0); int btnTextSize = obtainStyledAttributes.getDimensionPixelSize(R.styleable.AmountView_btnTextSize, 0); obtainStyledAttributes.recycle(); LayoutParams btnParams = new LayoutParams(btnWidth, LayoutParams.MATCH_PARENT); btnDecrease.setLayoutParams(btnParams); btnIncrease.setLayoutParams(btnParams); if (btnTextSize != 0) { btnDecrease.setTextSize(TypedValue.COMPLEX_UNIT_PX, btnTextSize); btnIncrease.setTextSize(TypedValue.COMPLEX_UNIT_PX, btnTextSize); } LayoutParams textParams = new LayoutParams(tvWidth, LayoutParams.MATCH_PARENT); etAmount.setLayoutParams(textParams); if (tvTextSize != 0) { etAmount.setTextSize(tvTextSize); } } public void setOnAmountChangeListener(OnAmountChangeListener onAmountChangeListener) { this.mListener = onAmountChangeListener; } public void setGoods_storage(int goods_storage) { this.goods_storage = goods_storage; } @Override public void onClick(View v) { int i = v.getId(); if (i == R.id.btnDecrease) { if (amount > 1) { amount--; etAmount.setText(amount + ""); } } else if (i == R.id.btnIncrease) { if (amount < goods_storage) { amount++; etAmount.setText(amount + ""); } } etAmount.clearFocus(); if (mListener != null) { mListener.onAmountChange(this, amount); } } @Override public void beforeTextChanged(CharSequence s, int start, int count, int after) { } @Override public void onTextChanged(CharSequence s, int start, int before, int count) { } @Override public void afterTextChanged(Editable s) { } public int getAmount(){ return amount; } public void setAmount(int amount){ this.amount = amount; etAmount.setText(amount+""); } public interface OnAmountChangeListener { void onAmountChange(View view, int amount); }}import android.support.v7.app.AppCompatActivity;import android.os.Bundle;import android.widget.CheckBox;import android.widget.ExpandableListView;import android.widget.TextView;import com.example.thecar.bean.ChildBean;import com.example.thecar.bean.GroupBean;import com.example.thecar.utils.CartUtils;import java.util.ArrayList;import java.util.List;///////////////MainActivitypublic class MainActivity extends AppCompatActivity { private ExpandableListView listView; private TextView price,num; private CheckBox both; private List<GroupBean> glist=new ArrayList<>(); private List<List<ChildBean>> clists=new ArrayList<>(); @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_main); listView= (ExpandableListView) findViewById(R.id.listview); price= (TextView) findViewById(R.id.price); num= (TextView) findViewById(R.id.num); both= (CheckBox) findViewById(R.id.both); for(int i=0;i<2;i++){ glist.add(new GroupBean("商家"+i,false)); } List<ChildBean> list1=new ArrayList<>(); for(int i=0;i<5;i++){ list1.add(new ChildBean("商品"+i,1+"","https://ss1.bdstatic.com/70cFvXSh_Q1YnxGkpoWK1HF6hhy/it/u=594559231,2167829292&fm=27&gp=0.jpg",false,2)); } List<ChildBean> list2=new ArrayList<>(); for(int i=0;i<5;i++){ list2.add(new ChildBean("商品"+i,1+"","https://ss1.bdstatic.com/70cFvXSh_Q1YnxGkpoWK1HF6hhy/it/u=594559231,2167829292&fm=27&gp=0.jpg",false,2)); } clists.add(list1); clists.add(list2); CartUtils.setCartData(this,glist,clists,listView,both,num,price); }}
//bg_amount_layout.xml<?xml version="1.0" encoding="utf-8"?><shape xmlns:android="http://schemas.android.com/apk/res/android"> <solid android:color="#FFFFFF" /> <stroke android:width="1dp" android:color="@color/divider" /> <padding android:bottom="1dp" android:left="1dp" android:right="1dp" android:top="1dp" /></shape>//btn_amount.xml<?xml version="1.0" encoding="utf-8"?><selector xmlns:android="http://schemas.android.com/apk/res/android"> <item android:state_pressed="true" android:drawable="@color/divider" /> <item android:state_enabled="false" android:drawable="@color/divider" /> <item android:drawable="@android:color/white" /></selector>//divider.xml<?xml version="1.0" encoding="utf-8"?><shape xmlns:android="http://schemas.android.com/apk/res/android" android:shape="rectangle"> <size android:width="0.5dp"/> <solid android:color="@color/divider"/></shape>
//activity_main.xml<?xml version="1.0" encoding="utf-8"?><RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android" xmlns:tools="http://schemas.android.com/tools" android:layout_width="match_parent" android:layout_height="match_parent"> <ExpandableListView android:id="@+id/listview" android:layout_width="match_parent" android:layout_height="match_parent" android:layout_alignParentTop="true" android:layout_alignParentLeft="true" android:layout_alignParentStart="true"></ExpandableListView> <RelativeLayout android:id="@+id/a" android:layout_width="match_parent" android:layout_height="50dp" android:layout_alignParentBottom="true" > <CheckBox android:id="@+id/both" android:layout_width="wrap_content" android:layout_height="wrap_content" android:text="全选" android:layout_centerVertical="true" /> <TextView android:id="@+id/price" android:layout_width="wrap_content" android:layout_height="match_parent" android:text="价格" android:layout_centerInParent="true" android:gravity="center" /> <TextView android:id="@+id/num" android:layout_width="wrap_content" android:layout_height="match_parent" android:text="价格" android:layout_alignParentRight="true" android:gravity="center" /> </RelativeLayout></RelativeLayout>//child.xml<?xml version="1.0" encoding="utf-8"?><LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" xmlns:app="http://schemas.android.com/apk/res-auto" android:orientation="horizontal" android:layout_width="match_parent" android:layout_height="100dp" android:gravity="center_vertical" android:layout_marginTop="10dp" android:layout_marginBottom="10dp"> <CheckBox android:id="@+id/child" android:layout_width="50dp" android:layout_height="50dp" android:layout_marginLeft="30dp" /> <ImageView android:id="@+id/image" android:layout_width="100dp" android:layout_height="100dp" android:scaleType="centerCrop" /> <LinearLayout android:layout_width="0dp" android:layout_height="match_parent" android:layout_weight="1" android:orientation="vertical" android:layout_marginLeft="10dp" > <TextView android:id="@+id/title" android:layout_width="match_parent" android:layout_height="0dp" android:layout_weight="1" android:layout_marginRight="10dp" android:maxLines="2" android:textSize="16sp" android:layout_marginTop="10dp" /> <LinearLayout android:layout_width="match_parent" android:layout_height="0dp" android:layout_weight="1" android:gravity="center_vertical" android:orientation="horizontal" android:layout_marginRight="10dp" android:layout_marginLeft="10dp" > <TextView android:id="@+id/price" android:layout_width="wrap_content" android:layout_height="match_parent" android:textSize="17sp" android:gravity="center_vertical" android:textColor="#ff8100" /> <com.example.thecar.utils.Jiajianqi android:id="@+id/amount_view" android:layout_width="0dp" android:layout_weight="1" android:layout_height="match_parent" android:layout_marginLeft="10dp" app:btnTextSize="14sp" android:gravity="center" app:btnWidth="36dp" android:layout_marginBottom="5dp" app:tvWidth="50dp"></com.example.thecar.utils.Jiajianqi> </LinearLayout> </LinearLayout></LinearLayout>//group.xml<?xml version="1.0" encoding="utf-8"?><LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" android:orientation="horizontal" android:layout_width="match_parent" android:layout_height="50dp" android:gravity="center_vertical" > <CheckBox android:id="@+id/group" android:layout_width="50dp" android:layout_height="50dp" android:layout_marginLeft="10dp" /> <TextView android:id="@+id/group_name" android:layout_width="0dp" android:layout_height="match_parent" android:layout_marginLeft="10dp" android:textSize="18sp" android:layout_weight="1" android:gravity="center_vertical" /></LinearLayout>//view_amount.xml<?xml version="1.0" encoding="utf-8"?><LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" android:layout_width="wrap_content" android:layout_height="wrap_content" android:focusable="true" android:divider="@drawable/divider" android:background="@drawable/bg_amount_layout" android:showDividers="middle" android:orientation="horizontal"> <Button android:id="@+id/btnDecrease" android:layout_width="0dp" android:layout_height="match_parent" android:layout_weight="1" android:gravity="center" android:background="@drawable/btn_amount" android:text="-"/> <EditText android:id="@+id/etAmount" android:layout_width="0dp" android:layout_height="match_parent" android:minWidth="60dp" android:layout_weight="2" android:background="@null" android:inputType="number" android:gravity="center" android:text="1"/> <Button android:id="@+id/btnIncrease" android:layout_width="0dp" android:layout_height="match_parent" android:layout_weight="1" android:gravity="center" android:background="@drawable/btn_amount" android:text="+"/></LinearLayout>//attrs.xml<?xml version="1.0" encoding="utf-8"?><resources> <declare-styleable name="AmountView"> <!-- 左右2边+-按钮的宽度 --> <attr name="btnWidth" format="dimension" /> <!-- 中间TextView的宽度 --> <attr name="tvWidth" format="dimension" /> <!--<attr name="tvColor" format="color"/>--> <attr name="tvTextSize" format="dimension"/> <attr name="btnTextSize" format="dimension"/> </declare-styleable></resources>//colors.xml<?xml version="1.0" encoding="utf-8"?><resources> <color name="divider">#ffd2d2d2</color> <color name="count">#ffae01</color> <color name="money">#ff6e01</color></resources>//styles.xml<resources> <!-- Base application theme. --> <style name="AppTheme" parent="Theme.AppCompat.Light.DarkActionBar"> <!-- Customize your theme here. --> </style></resources>阅读全文
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