分享Android中ExpandableListView控件使用教程

<?xml version="1.0" encoding="utf-8"?> <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"   android:orientation="vertical"   android:layout_width="fill_parent"   android:layout_height="fill_parent">   <!-- 我们会自己定义listview的显示方式（在另外一个布局文件里边）不用默认的方式       如果自定义listview的显示方式这里这个android:id="@id/android:list" 必须这样写 -->   <!-- android:drawSelectOnTop="false"此属性用来设置listview上的背景颜色会不会    挡住（覆盖）内容 , 如果这是为false就表示不会覆盖掉 -->    <ExpandableListView      android:id="@id/android:list"             android:layout_width="fill_parent"             android:layout_height="wrap_content"            android:layout_weight="1"             android:drawSelectorOnTop="false"/>  </LinearLayout> 

package com.andyidea.demo;  import java.util.ArrayList; import java.util.List;  import android.app.ExpandableListActivity; import android.os.Bundle; import android.view.Gravity; import android.view.View; import android.view.ViewGroup; import android.view.Window; import android.widget.AbsListView; import android.widget.BaseExpandableListAdapter; import android.widget.TextView;  public class ContactsActivity extends ExpandableListActivity {      List<String> group;      //组列表   List<List<String>> child;   //子列表   ContactsInfoAdapter adapter; //数据适配器      /** Called when the activity is first created. */   @Override   public void onCreate(Bundle savedInstanceState) {     super.onCreate(savedInstanceState);     requestWindowFeature(Window.FEATURE_NO_TITLE); //设置为无标题     setContentView(R.layout.main);     getExpandableListView().setBackgroundResource(R.drawable.default_bg);          initializeData();     getExpandableListView().setAdapter(new ContactsInfoAdapter());     getExpandableListView().setCacheColorHint(0); //设置拖动列表的时候防止出现黑色背景   }      /**    * 初始化组、子列表数据    */   private void initializeData(){     group = new ArrayList<String>();     child = new ArrayList<List<String>>();          addInfo("Andy",new String[]{"male","138123***","GuangZhou"});     addInfo("Fairy",new String[]{"female","138123***","GuangZhou"});     addInfo("Jerry",new String[]{"male","138123***","ShenZhen"});     addInfo("Tom",new String[]{"female","138123***","ShangHai"});     addInfo("Bill",new String[]{"male","138231***","ZhanJiang"});        }      /**    * 模拟给组、子列表添加数据    * @param g-group    * @param c-child    */   private void addInfo(String g,String[] c){     group.add(g);     List<String> childitem = new ArrayList<String>();     for(int i=0;i<c.length;i++){       childitem.add(c[i]);     }     child.add(childitem);   }      class ContactsInfoAdapter extends BaseExpandableListAdapter{           //-----------------Child----------------//     @Override     public Object getChild(int groupPosition, int childPosition) {       return child.get(groupPosition).get(childPosition);     }          @Override     public long getChildId(int groupPosition, int childPosition) {       return childPosition;     }          @Override     public int getChildrenCount(int groupPosition) {       return child.get(groupPosition).size();     }          @Override     public View getChildView(int groupPosition, int childPosition,         boolean isLastChild, View convertView, ViewGroup parent) {       String string = child.get(groupPosition).get(childPosition);        return getGenericView(string);     }          //----------------Group----------------//     @Override     public Object getGroup(int groupPosition) {       return group.get(groupPosition);     }              @Override     public long getGroupId(int groupPosition) {       return groupPosition;     }            @Override     public int getGroupCount() {       return group.size();     }            @Override     public View getGroupView(int groupPosition, boolean isExpanded,         View convertView, ViewGroup parent) {       String string = group.get(groupPosition);        return getGenericView(string);     }      //创建组/子视图      public TextView getGenericView(String s) {        // Layout parameters for the ExpandableListView        AbsListView.LayoutParams lp = new AbsListView.LayoutParams(            ViewGroup.LayoutParams.FILL_PARENT, 40);         TextView text = new TextView(ContactsActivity.this);        text.setLayoutParams(lp);        // Center the text vertically        text.setGravity(Gravity.CENTER_VERTICAL | Gravity.LEFT);        // Set the text starting position        text.setPadding(36, 0, 0, 0);                text.setText(s);        return text;      }                @Override     public boolean hasStableIds() {       // TODO Auto-generated method stub       return false;     }          @Override     public boolean isChildSelectable(int groupPosition, int childPosition) {       // TODO Auto-generated method stub       return true;     }        } }