android ExpandableListView伸缩列表

程序员文章站 2022-06-03 12:50:19

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这两天做东西要用到伸缩菜单，倒腾了两天终于出来了，分享一下：

1.布局文件shop_info_layout.xml：

<ExpandableListView android:id="@+id/shop_tests"
           android:layout_width="wrap_content"
           android:layout_height="wrap_content"
           android:scrollbars="none"
           ></ExpandableListView>
xml中声明一个ExpandableListView

2.ExpandableListView 一级列表布局shop_product_item_layout.xml：

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="fill_parent"
    android:layout_height="40dp"
    android:gravity="center"
    >
    
	<TextView android:id="@+id/shop_product_name"
	    style="@style/TextStyle3"
	    android:gravity="center"
	    android:textColor="#000"
	    android:layout_marginLeft="5dp"
	    />
    
    <TextView android:id="@+id/shop_yuan"
        style="@style/TextStyle3"
        android:layout_alignParentRight="true"
        android:textColor="#000"
        android:layout_marginRight="5dp"
        android:layout_alignBaseline="@+id/shop_product_name"
        android:text="元"/>
    
    <TextView android:id="@+id/shop_productprice"
        style="@style/TextStyle3"
         android:textColor="#E96C14"
         android:layout_alignBaseline="@+id/shop_product_name"
         android:layout_toLeftOf="@+id/shop_yuan"
        />
    
    
</RelativeLayout>

3.每个一级item下的二级信息布局shop_product_attr_layout.xml

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="fill_parent"
    android:layout_height="wrap_content"
    android:id="@+id/shop_attrlist"
    android:orientation="horizontal"
    >
    
    <TextView android:id="@+id/shop_product_attrone"
        style="@style/TextStyle3"
        android:textColor="#000"
        android:textSize="14sp"
        android:layout_marginLeft="5dp"
        />
    
	<TextView android:id="@+id/shop_product_attrtwo"
	    android:textColor="#000"
	    style="@style/TextStyle3"
	    android:layout_marginLeft="15dp"
	     android:textSize="14sp"
	    />
	<TextView android:id="@+id/shop_product_attrprice"
	   	android:textColor="#FD6F0C"
	   	style="@style/TextStyle3"
	   	android:layout_marginLeft="20dp"
	    />
	<TextView android:id="@+id/shop_product_yuan"
	    style="@style/TextStyle3"
	    android:textColor="#000"
	     android:textSize="14sp"
	    android:text="元"/>
	<ImageView android:id="@+id/shop_product_attrcart"
	    android:layout_width="35dp"
	    android:layout_height="35dp"
	    android:background="@drawable/shop_purchase_cart"
	    android:layout_marginLeft="15dp"/>
</LinearLayout>

布局文件中用到的 style="@style/TextStyle3"：

<style name="TextStyle3">
        <item name="android:textSize">16sp</item>
        <item name="android:textColor">#fff</item>
        <item name="android:layout_width">wrap_content</item>
        <item name="android:layout_height">wrap_content</item>
    </style>

4.定义ExpandableAdapter：

import java.util.List;
import java.util.Map;

import com.zline.app.avtivity.R;
import com.zline.app.entity.Product;
import com.zline.app.entity.ProductAttr;

import android.content.Context;
import android.util.Log;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.BaseExpandableListAdapter;
import android.widget.LinearLayout;
import android.widget.RelativeLayout;
import android.widget.TextView;
import android.widget.Toast;

public class ExpandableAdapter extends BaseExpandableListAdapter{
	
	private Context context;
	private List<Product> productList;
	private Map<Integer, List<ProductAttr>> attrMap;
	private LayoutInflater layoutInflater;
	
	public ExpandableAdapter(Context context,List<Product> productList,Map<Integer, List<ProductAttr>> attrMap){
		this.attrMap = attrMap;
		this.productList = productList;
		this.context = context;
	}

	@Override
	public Object getChild(int parentPosition, int childPosition) {
		return attrMap.get(productList.get(parentPosition).getProductId());
	}

	@Override
	public long getChildId(int parentPosition, int childPosition) {
		return childPosition;
	}

	@Override
	public View getChildView(int parentPosition, int childPosition, boolean isLastChild, View convertView,
			ViewGroup parent) {
		Holder holder;
		if(convertView==null){
			layoutInflater = (LayoutInflater) context.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
			LinearLayout layout = (LinearLayout) layoutInflater.from(context).inflate(R.layout.shop_product_attr_layout, null);
			convertView = layout;
			holder = new Holder();
			holder.attrOne = (TextView) convertView.findViewById(R.id.shop_product_attrone);
			holder.attrOne.setText(attrMap.get(productList.get(parentPosition).getProductId()).get(childPosition).getDictOne());
			holder.attrTwo = (TextView) convertView.findViewById(R.id.shop_product_attrtwo);
			holder.attrTwo.setText(attrMap.get(productList.get(parentPosition).getProductId()).get(childPosition).getDictTwo());
			holder.price = (TextView) convertView.findViewById(R.id.shop_product_attrprice);
			holder.price.setText(attrMap.get(productList.get(parentPosition).getProductId()).get(childPosition).getPrice()+"");
			convertView.setTag(holder);
		}else{
			holder = (Holder) convertView.getTag();
		}
		return convertView;
	}

	@Override
	public int getChildrenCount(int parentPosition) {
		return attrMap.get(productList.get(parentPosition).getProductId()).size();
	}

	@Override
	public Object getGroup(int parentPosition) {
		return productList.get(parentPosition);
	}

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

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

	@Override
	public View getGroupView(int parentPosition, boolean isExpanded, View convertView, ViewGroup parent) {
		layoutInflater = (LayoutInflater) context.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
		RelativeLayout relativeLayout = (RelativeLayout) layoutInflater.inflate(R.layout.shop_product_item_layout, null);
		TextView productName = (TextView) relativeLayout.findViewById(R.id.shop_product_name);
		productName.setText(productList.get(parentPosition).getProductName());
		TextView priceRange = (TextView) relativeLayout.findViewById(R.id.shop_productprice);
		priceRange.setText(productList.get(parentPosition).getPriceRange());
		return relativeLayout;
	}

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

	@Override
	public boolean isChildSelectable(int arg0, int arg1) {
		return true;
	}

	public boolean isEmpty() {
		return false;
	}

	public void onGroupExpanded(int groupPosition) {
		int a = getChildrenCount(groupPosition);
		if (a == 0) {
			Toast.makeText(context, "该组下没有数据!", Toast.LENGTH_LONG).show();
		}
	}

	public void onGroupCollapsed(int groupPosition) {
		Log.i("GFEDCBA", "我被折叠了！");
	} 
	
	static class Holder{
		TextView attrOne;
		TextView attrTwo;
		TextView price;
	}

5.activity：

import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;

import com.zline.app.entity.Product;
import com.zline.app.entity.ProductAttr;
import com.zline.app.myclass.shop.ExpandableAdapter;
import com.zline.app.myclass.shop.GalleryAdapter;

import android.os.Bundle;
import android.view.Window;
import android.widget.ExpandableListView;
import android.widget.Gallery;
import android.widget.ImageView;
import android.widget.ListView;
import android.widget.RatingBar;
import android.widget.RatingBar.OnRatingBarChangeListener;
import android.widget.TextView;
import android.widget.Toast;
import android.app.Activity;

@SuppressWarnings("deprecation")
public class ShopInfoActivity extends Activity {

	
	
	List<Product> products;
	Map<Integer, List<ProductAttr>> productAttrs;
	ExpandableListView expandableListView;
    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        requestWindowFeature(Window.FEATURE_NO_TITLE);
        setContentView(R.layout.shop_info_layout);
        createProduct();
        createAttr();
        initView();
    }


    
    //初始化各个组件
   private void initView(){
	 
	   expandableListView = (ExpandableListView) findViewById(R.id.shop_tests);
	   ExpandableAdapter expandableAdapter = new ExpandableAdapter(this, products, productAttrs);
	   expandableListView.setAdapter(expandableAdapter);
   } 
   
   
   private List<Map<String, Object>> createAttrs(){
	   attrList = new ArrayList<Map<String,Object>>();
	   for(int i=0;i<2;i++){
		   Map<String, Object> m = new HashMap<String, Object>();
		   m.put(ConstantDef.PRODUTC_ATTR_ONE, "规格：半只");
		   m.put(ConstantDef.PRODUCT_ATTR_TWO, "口味：纯香");
		   m.put(ConstantDef.PRODUCT_ATTR_PRICE, 38.0);
		   attrList.add(m);
	   }
	   return attrList;
   }*/
   
   private List<Product> createProduct(){
	   products = new ArrayList<Product>();
	   for(int i=0;i<4;i++){
		   Product p = new Product();
		   p.setPriceRange("29-32");
		   p.setProductName("港式叉烧饭");
		   p.setProductId(i+1);
		   products.add(p);
	   }
	   return products;
   }
   
   private Map<Integer, List<ProductAttr>> createAttr(){
	   productAttrs = new HashMap<Integer, List<ProductAttr>>();
	 //  List<ProductAttr> 
	   for(Product p:products){
		   List<ProductAttr> attrs = productAttrs.get(p.getProductId());
		   if(attrs == null){
			   attrs = new ArrayList<ProductAttr>();
			   ProductAttr attr = new ProductAttr();
			   attr.setDictOne("规格：半只");
			   attr.setDictTwo("风味：纯香");
			   attr.setPrice(28);
			   attr.setProductId(p.getProductId());
			   attr.setAttrId(products.indexOf(p));
			   attrs.add(attr);
			   attrs.add(attr);
			   productAttrs.put(p.getProductId(), attrs);
		   }else{
			   ProductAttr attr = new ProductAttr();
			   attr.setDictOne("规格：半只");
			   attr.setDictTwo("风味：纯香");
			   attr.setPrice(28);
			   attr.setProductId(p.getProductId());
			   attr.setAttrId(products.indexOf(p));
			   attrs.add(attr);
			   attrs.add(attr);
			   productAttrs.put(p.getProductId(), attrs);
		   }
	   }
	   return productAttrs;
   }

效果看附件。

参考文献：http://blog.csdn.net/luck_apple/article/details/6742018

http://wenku.baidu.com/view/f6ec17265901020207409c36.html

http://blog.csdn.net/jianghuiquan/article/details/8350550

查看图片附件

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