ListView contentList=(ListView) findViewById(R.id.blackname_manager_listV);
contentList.setAdapter(mListAdapter);
registerForContextMenu(contentList);

public void onCreateContextMenu(ContextMenu menu, View v,
    ContextMenuInfo menuInfo) {
  super.onCreateContextMenu(menu, v, menuInfo);
  menu.add(0, MENU_UPDATE, 0, "修改信息");
  menu.add(0, MENU_ADD, 0, "删除记录");
}

public boolean onContextItemSelected(MenuItem item) {
  //获取上下文菜单适配器
    AdapterContextMenuInfo cmi=(AdapterContextMenuInfo)item.getMenuInfo();
  //获取被选择的菜单位置
    int posMenu=cmi.position;
  //将菜单项与列表视图的条目相关联
    items=(BlackNumber) mListAdapter.getItem(posMenu);
    switch(item.getItemId()){
    case MENU_UPDATE://执行该菜单条目的业务逻辑
      break;
    case MENU_ADD:
        //执行该菜单条目的业务逻辑
      break;
    }
    return super.onContextItemSelected(item);
}