效果图
public class TestExpandableListView extends Activity {</p><p> ExpandableListView mView;</p><p> @Override</p><p> protected void onCreate(Bundle savedInstanceState) {</p><p> super.onCreate(savedInstanceState);</p><p> setContentView(R.layout.expandable_<b style="color:black;background-color:#99ff99">listview</b>);</p><p> </p><p> mView = (ExpandableListView) findViewById(R.id.el_list);</p><p> mView.setAdapter(new MyAdapter());</p><p> </p><p> }</p><p> </p><p> class MyAdapter extends BaseExpandableListAdapter {</p><p> </p><p> //设置组视图的图片</p><p>// int[] logos = new int[] { R.drawable.wei, R.drawable.shu,R.drawable.wu};</p><p> //设置组视图的显示文字</p><p> private String[] generalsTypes = new String[] { "魏", "蜀", "吴" };</p><p> //子视图显示文字</p><p> private String[][] generals = new String[][] {</p><p> { "夏侯惇", "甄姬", "许褚", "郭嘉", "司马懿", "杨修" },</p><p> { "马超", "张飞", "刘备", "诸葛亮", "黄月英", "赵云" },</p><p> { "吕蒙", "陆逊", "孙权", "周瑜", "孙尚香" }</p><p> };</p><p> </p><p> //子视图图片</p><p>// public int[][] generallogos = new int[][] {</p><p>// { R.drawable.xiahoudun, R.drawable.zhenji,</p><p>// R.drawable.xuchu, R.drawable.guojia,</p><p>// R.drawable.simayi, R.drawable.yangxiu },</p><p>// { R.drawable.machao, R.drawable.zhangfei,</p><p>// R.drawable.liubei, R.drawable.zhugeliang,</p><p>// R.drawable.huangyueying, R.drawable.zhaoyun },</p><p>// { R.drawable.lvmeng, R.drawable.luxun, R.drawable.sunquan,</p><p>// R.drawable.zhouyu, R.drawable.sunshangxiang } };</p><p> //自己定义一个获得textview的方法</p><p> TextView getTextView() {</p><p> AbsListView.LayoutParams lp = new AbsListView.LayoutParams(ViewGroup.LayoutParams.FILL_PARENT, 100);</p><p> TextView textView = new TextView(TestExpandableListView.this);</p><p> textView.setLayoutParams(lp);</p><p> textView.setGravity(Gravity.CENTER_VERTICAL);</p><p> textView.setPadding(36, 0, 0, 0);</p><p> textView.setTextSize(20);</p><p> textView.setTextColor(Color.BLACK);</p><p> return textView;</p><p> }</p><p> @Override</p><p> public int getGroupCount() {</p><p> return generalsTypes.length;</p><p> }</p><p> @Override</p><p> public int getChildrenCount(int groupPosition) {</p><p> return generals[groupPosition].length;</p><p> }</p><p> @Override</p><p> public Object getGroup(int groupPosition) {</p><p> return generalsTypes[groupPosition];</p><p> }</p><p> @Override</p><p> public Object getChild(int groupPosition, int childPosition) {</p><p> return generals[groupPosition][childPosition];</p><p> }</p><p> @Override</p><p> public long getGroupId(int groupPosition) {</p><p> return groupPosition;</p><p> }</p><p> @Override</p><p> public long getChildId(int groupPosition, int childPosition) {</p><p> return childPosition;</p><p> }</p><p> @Override</p><p> public boolean hasStableIds() {</p><p> return true;</p><p> }</p><p> @Override</p><p> public View getGroupView(int groupPosition, boolean isExpanded,</p><p> View convertView, ViewGroup parent) {</p><p> LinearLayout ll = new LinearLayout(TestExpandableListView.this);</p><p> ll.setOrientation(0);</p><p>// ImageView logo = new ImageView(ExpandableList.this);</p><p>// logo.setImageResource(logos[groupPosition]);</p><p>// logo.setPadding(50, 0, 0, 0);</p><p>// ll.addView(logo);</p><p> TextView textView = getTextView();</p><p> textView.setTextColor(Color.BLUE);</p><p> textView.setText(getGroup(groupPosition).toString());</p><p> ll.addView(textView);</p><p> ll.setPadding(100, 10, 10, 10);</p><p> return ll;</p><p> }</p><p> @Override</p><p> public View getChildView(int groupPosition, int childPosition,</p><p> boolean isLastChild, View convertView, ViewGroup parent) {</p><p> LinearLayout ll = new LinearLayout(TestExpandableListView.this);</p><p> ll.setOrientation(0);</p><p>// ImageView generallogo = new ImageView(TestExpandableListView.this);</p><p>// generallogo.setImageResource(generallogos[groupPosition][childPosition]);</p><p>// ll.addView(generallogo);</p><p> TextView textView = getTextView();</p><p> textView.setText(getChild(groupPosition, childPosition).toString());</p><p> ll.addView(textView);</p><p> return ll;</p><p> }</p><p> @Override</p><p> public boolean isChildSelectable(int groupPosition, int childPosition) {</p><p> return true;</p><p> }</p><p> </p><p> }</p><p>}</p><p>
expandable_listview.xml
<?xml version="1.0" encoding="utf-8"?></p><p><LinearLayout xmlns:<b style="color:black;background-color:#ffff66">android</b>="http://schemas.<b style="color:black;background-color:#ffff66">android</b>.com/apk/res/<b style="color:black;background-color:#ffff66">android</b>"</p><p> <b style="color:black;background-color:#ffff66">android</b>:layout_width="fill_parent"</p><p> <b style="color:black;background-color:#ffff66">android</b>:layout_height="fill_parent"</p><p> <b style="color:black;background-color:#ffff66">android</b>:orientation="vertical" ></p><p> <ExpandableListView </p><p> <b style="color:black;background-color:#ffff66">android</b>:id="@+id/el_list"</p><p> <b style="color:black;background-color:#ffff66">android</b>:layout_width="fill_parent"</p><p> <b style="color:black;background-color:#ffff66">android</b>:layout_height="fill_parent"</p><p> <b style="color:black;background-color:#ffff66">android</b>:background="#ffffff"</p><p> <b style="color:black;background-color:#ffff66">android</b>:cacheColorHint="#abcdefff"</p><p> <b style="color:black;background-color:#ffff66">android</b>:listSelector="#cdefabdc" </p><p> ></p><p> <!-- <b style="color:black;background-color:#ffff66">android</b>:cacheColorHint="#00000000"，这个设置拖动view时背景色</p><p> <b style="color:black;background-color:#ffff66">android</b>:listSelector="#00000000" ，设置选中时的底色 --></p><p> </ExpandableListView> </p><p></LinearLayout>
一些方法说明：
1. ExpandableListAdapter
group和child都有getView方法，即可使用不同的布局，ViewHolder等
在getView方法的，groupPosition和childPosition 即在两个集合中的位置
2. ExpandableListView
getFirstVisiblePosition();
getLastVisiblePosition(); //返回屏幕最后可见item的位置: 只计算可见view的位置(不含被group 收缩的子view)
getPackedPositionGroup(getExpandableListPosition(getFirstVisiblePosition()); //返回 首可见项所在group位置
setOnChildClickListener() child点击
setOnGroupClickListener() group点击