Android(安卓)ListView 和 BaseAdapter 的使用

private ArrayList<HashMap<String, Object>> getDate(){025ArrayList<HashMap<String, Object>> listItem = new ArrayList<HashMap<String,Object>>();026/**为动态数组添加数据*/027for(int i=0;i<30;i++)028{029HashMap<String, Object> map = new HashMap<String, Object>();030map.put("ItemTitle", "第"+i+"行");031map.put("ItemText", "这是第"+i+"行");032listItem.add(map);033}034return listItem;035}036/** 新建一个类继承BaseAdapter，实现视图与数据的绑定037*/038privateclass MyAdapter extends BaseAdapter {039private LayoutInflater mInflater;//得到一个LayoutInfalter对象用来导入布局040041/**构造函数*/042public MyAdapter(Context context) {043this.mInflater = LayoutInflater.from(context);044}045046@Override047publicint getCount() {048return getDate().size();//返回数组的长度049}050051@Override052public Object getItem(int position) {053returnnull;054}055056@Override057publiclong getItemId(int position) {058return 0;059}060061/**书中详细解释该方法*/062@Override063public View getView(finalint position, View convertView, ViewGroup parent) {064ViewHolder holder;065//观察convertView随ListView滚动情况066Log.v("MyListViewBase", "getView " + position + " " + convertView);067if (convertView == null) {068convertView = mInflater.inflate(R.layout.item,null);069holder = new ViewHolder();070/**得到各个控件的对象*/071holder.title = (TextView) convertView.findViewById(R.id.ItemTitle);072holder.text = (TextView) convertView.findViewById(R.id.ItemText);073holder.bt = (Button) convertView.findViewById(R.id.ItemButton);074convertView.setTag(holder);//绑定ViewHolder对象075}076else{077holder = (ViewHolder)convertView.getTag();//取出ViewHolder对象078}079/**设置TextView显示的内容，即我们存放在动态数组中的数据*/080holder.title.setText(getDate().get(position).get("ItemTitle").toString());081holder.text.setText(getDate().get(position).get("ItemText").toString());082083/**为Button添加点击事件*/084holder.bt.setOnClickListener(new OnClickListener() {085@Override086publicvoid onClick(View v) {087Log.v("MyListViewBase", "你点击了按钮" + position);//打印Button的点击信息088}089});090091return convertView;092}093094}095096/**存放控件*/097publicfinalclass ViewHolder{098public TextView title;099public TextView text;100public Button bt;101}102}
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