Android的 ListView 扩展实例

            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;    }       }  }