Layout <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" android:paddingLeft="@dimen/activity_horizontal_margin" android:paddingRight="@dimen/activity_horizontal_margin" android:paddingTop="@dimen/activity_vertical_margin" android:paddingBottom="@dimen/activity_vertical_margin" tools:context=".ExpandableListViewActivity"> <ExpandableListView android:layout_width="fill_parent" android:layout_height="wrap_content" android:id="@+id/ecpandable" /> </RelativeLayout>
JAVA代码 package com.example.wequst.test2; import android.app.Activity; import android.app.AlertDialog; import android.os.Bundle; import android.view.View; import android.view.ViewGroup; import android.widget.AbsListView; import android.widget.BaseExpandableListAdapter; import android.widget.ExpandableListAdapter; import android.widget.ExpandableListView; import android.widget.ImageView; import android.widget.LinearLayout; import android.widget.TextView; import android.widget.AdapterView; import android.widget.AdapterView.OnItemClickListener; public class ExpandableListViewActivity extends Activity { @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_expandable_list_view); /**BaseExpandableListAdapter实现了ExpandableListAdapter*/ final ExpandableListAdapter adapter = new BaseExpandableListAdapter(){ /**----------定义数组-------------------------------------------------------------------*/ private int[] images = new int[]{ R.drawable.ic_launcher, R.drawable.ic_launcher, R.drawable.ic_launcher }; private String[] armTypes = new String[]{ "神族","虫族","人族" }; private String[][] arms = new String[][]{ {"狂战士","龙骑士","黑暗圣堂"}, {"小狗","飞龙","自爆妃子"}, {"步兵","伞兵","护士mm"} }; /*===========组元素表示可折叠的列表项，子元素表示列表项展开后看到的多个子元素项=============*/ /**----------得到armTypes和arms中每一个元素的ID-------------------------------------------*/ //获取组在给定的位置编号，即armTypes中元素的ID @Override public long getGroupId(int groupPosition) { return groupPosition; } //获取在给定的组的儿童的ID，就是arms中元素的ID @Override public long getChildId(int groupPosition, int childPosition) { return childPosition; } /**----------根据上面得到的ID的值，来得到armTypes和arms中元素的个数 ------------------------*/ //获取的群体数量，得到armTypes里元素的个数 @Override public int getGroupCount() { return armTypes.length; } //取得指定组中的儿童人数，就是armTypes中每一个种族它军种的个数 @Override public int getChildrenCount(int groupPosition) { return arms[groupPosition].length; } /**----------利用上面getGroupId得到ID，从而根据ID得到armTypes中的数据，并填到TextView中 -----*/ //获取与给定的组相关的数据，得到数组armTypes中元素的数据 @Override public Object getGroup(int groupPosition) { return armTypes[groupPosition]; } //获取一个视图显示给定组，存放armTypes @Override public View getGroupView(int groupPosition, boolean isExpanded, View convertView, ViewGroup parent) { TextView textView = getTextView();//调用定义的getTextView()方法 textView.setText(getGroup(groupPosition).toString());//添加数据 return textView; } /**----------利用上面getChildId得到ID，从而根据ID得到arms中的数据，并填到TextView中---------*/ //获取与孩子在给定的组相关的数据,得到数组arms中元素的数据 @Override public Object getChild(int groupPosition, int childPosition) { return arms[groupPosition][childPosition]; } //获取一个视图显示在给定的组 的儿童的数据，就是存放arms @Override public View getChildView(int groupPosition, int childPosition, boolean isLastChild, View convertView, ViewGroup parent) { LinearLayout ll = new LinearLayout(ExpandableListViewActivity.this); ImageView logo = new ImageView(ExpandableListViewActivity.this); logo.setImageResource(images[groupPosition]);//添加图片 ll.addView(logo); TextView textView = getTextView();//调用定义的getTextView()方法 textView.setText(getChild(groupPosition,childPosition).toString());//添加数据 ll.addView(textView); return ll; } /**------------------自定义一个设定TextView属性的方法----------------------------------------------*/ //定义一个TextView private TextView getTextView(){ AbsListView.LayoutParams lp = new AbsListView.LayoutParams(ViewGroup.LayoutParams.FILL_PARENT,100); TextView textView = new TextView(ExpandableListViewActivity.this); textView.setLayoutParams(lp); textView.setPadding(70, 0, 0, 0); textView.setTextSize(20); return textView; } /**-------------------其他设置-------------------------------------------------------------------*/ //孩子在指定的位置是可选的，即：arms中的元素是可点击的 @Override public boolean isChildSelectable(int groupPosition, int childPosition) { return true; } //表示孩子是否和组ID是跨基础数据的更改稳定 public boolean hasStableIds() { return true; } }; /**使用适配器*/ final ExpandableListView expandListView = (ExpandableListView) this.findViewById(R.id.ecpandable); expandListView.setAdapter(adapter); expandListView.setOnChildClickListener(new ExpandableListView.OnChildClickListener() { @Override public boolean onChildClick(ExpandableListView parent, View v, int groupPosition, int childPosition, long id) { return true; } }); expandListView.setOnGroupClickListener(new ExpandableListView.OnGroupClickListener() { @Override public boolean onGroupClick(ExpandableListView parent, View v, int groupPosition, long id) { int i=adapter.getChildrenCount(groupPosition); if(i==0) { } return false; //默认为false，设为true时，点击事件不会展开Group } }); } }