扩展的ListView实例

今天从网上看了个扩展的listView的例子，感觉还蛮炫，自己也试着做了下。

由于比较简单，所有就直接上代码：

public class ExtendedListView extends ExpandableListActivity {

	@Override
	protected void onCreate(Bundle savedInstanceState) {
		// TODO Auto-generated method stub
		super.onCreate(savedInstanceState);
		
		MyExpandableListAdapter adapter=new MyExpandableListAdapter();
		setListAdapter(adapter);
		
	}
	public class MyExpandableListAdapter extends BaseExpandableListAdapter{
        public String[] groups={"我的好友","大学同学","高中同学"};
        public String[][] childrens={{"小张","小李","小丽","向明"},{"向明","向明","向明","向明"},{"向明","向明","向明","向明"}};
		public Object getChild(int groupPosition, int childPosition) {
			// TODO Auto-generated method stub
			return childrens[groupPosition][childPosition];
		}

		public long getChildId(int groupPosition, int childPosition) {
			// TODO Auto-generated method stub
			return childPosition;
		}

		public View getChildView(int groupPosition, int childPosition,
				boolean isLastChild, View convertView, ViewGroup parent) {
			// TODO Auto-generated method stub
			TextView textView=getGenericView();
		    textView.setText(getChild(groupPosition, childPosition).toString());
			return textView;
		}
		//新建一个TextView
		 public TextView getGenericView() {
	            // Layout parameters for the ExpandableListView
	            AbsListView.LayoutParams lp = new AbsListView.LayoutParams(
	                    ViewGroup.LayoutParams.MATCH_PARENT, 64);

	            TextView textView = new TextView(ExtendedListView.this);
	            textView.setLayoutParams(lp);
	            // Center the text vertically
	            textView.setGravity(Gravity.CENTER_VERTICAL | Gravity.LEFT);
	            // Set the text starting position
	            textView.setPadding(36, 0, 0, 0);
	            return textView;
	        }
	        
		public int getChildrenCount(int groupPosition) {
			// TODO Auto-generated method stub
			return childrens[groupPosition].length;
		}

		public Object getGroup(int groupPosition) {
			// TODO Auto-generated method stub
			return groups[groupPosition];
		}

		public int getGroupCount() {
			// TODO Auto-generated method stub
			return groups.length;
		}

		public long getGroupId(int groupPosition) {
			// TODO Auto-generated method stub
			return groupPosition;
		}

		public View getGroupView(int groupPosition, boolean isExpanded,
				View convertView, ViewGroup parent) {
			// TODO Auto-generated method stub
			TextView textView = getGenericView();
            textView.setText(getGroup(groupPosition).toString());
			return textView;
		}

		public boolean hasStableIds() {
			// TODO Auto-generated method stub
			return true;
		}

		public boolean isChildSelectable(int groupPosition, int childPosition) {
			// TODO Auto-generated method stub
			return true;
		}
		
	}
}

看一下运行在模拟器上的效果：