listview分页(上一页，下一页效果)并支持过滤（二）
上一篇文章中，只对listview进行了分页，本文将在上一篇代码的基础上，增加过滤的功能，过滤首先要给listview增加一个属性android:textFilterEnabled="true"，然后BaseAdapter要继承Filterable的接口。废话少说，上代码：
DsznzActivity代码，大部分代码和上一篇文章中的代码相同，就不重复写了，只写有改动和增加的
//增加了两个属性private ArrayList<HashMap<String, String>> tmpListItem;private EditText inputSearch;MyAdapter myAdapter;inputSearch=(EditText) findViewById(R.id.inputSearch);inputSearch.addTextChangedListener(new TextWatcher() { //监听文本框的改变 @Override public void onTextChanged(CharSequence s, int start, int before, int count) { myAdapter.getFilter().filter(s); } @Override public void beforeTextChanged(CharSequence s, int start, int count,int after) { } @Override public void afterTextChanged(Editable s) { }}); //tmpListItem是用来存储从数据库中获取到的所有记录，当listItem发生变化时，可以从tmpListItem中过滤取得需要的值 tmpListItem = new ArrayList<HashMap<String, String>>(); //在给listItem赋值的同时，也给tmpListItem赋值 JSONArray array = new JSONArray(URLDecoder.decode(json, "utf-8"));for (int i = 0; i < array.length(); i++) {HashMap<String, String> map = new HashMap<String, String>();map.put("ylfn_did", array.getJSONObject(i).getString("did"));map.put("ylfn_name", array.getJSONObject(i).getString("name"));map.put("gmsfz", array.getJSONObject(i).getString("gmsfz"));listItem.add(map);tmpListItem.add(map);}//MyAdapter// ListView的Adapter，这个是关键的导致可以分页的根本原因。public class MyAdapter extends BaseAdapter implements Filterable{Activity activity;private MyFilter filter;public MyAdapter(Activity a) {activity = a;}// 设置每一页的长度，默认的是View_Count的值。@Overridepublic int getCount() {// TODO Auto-generated method stub// return data.length;// ori表示到目前为止的前几页的总共的个数。int ori = VIEW_COUNT * index;// 值的总个数-前几页的个数就是这一页要显示的个数，如果比默认的值小，说明这是最后一页，只需显示这么多就可以了if (listItem.size() - ori < VIEW_COUNT) {return listItem.size() - ori;}// 如果比默认的值还要大，说明一页显示不完，还要用换一页显示，这一页用默认的值显示满就可以了。else {return VIEW_COUNT;}}@Overridepublic Object getItem(int position) {// TODO Auto-generated method stubreturn position;}@Overridepublic long getItemId(int position) {// TODO Auto-generated method stubreturn position;}@Overridepublic View getView(int position, View convertView, ViewGroup parent) {// TODO Auto-generated method stub// return addTestView(position);convertView = LayoutInflater.from(getApplicationContext()).inflate(R.layout.ylfn,null);TextView ylfn_did_view = (TextView)convertView.findViewById(R.id.ylfn_did);TextView ylfn_name_view = (TextView)convertView.findViewById(R.id.ylfn_name);TextView ylfn_gmsfz_view = (TextView)convertView.findViewById(R.id.gmsfz);ylfn_did_view.setText(listItem.get(position + index * VIEW_COUNT).get("ylfn_did"));ylfn_name_view.setText(listItem.get(position + index * VIEW_COUNT).get("ylfn_name"));ylfn_gmsfz_view.setText(listItem.get(position + index * VIEW_COUNT).get("gmsfz"));return convertView;}@Overridepublic Filter getFilter() { if(filter == null){ filter = new MyFilter(); } return filter;}}//MyFilterprivate class MyFilter extends Filter{ @Override protected FilterResults performFiltering(CharSequence constraint) { //存储过滤的值 FilterResults retval = new FilterResults(); retval.values = tmpListItem; retval.count = tmpListItem.size(); //有筛选条件时，显示被筛选的内容； 没有筛选条件时，显示所有内容 if(constraint != null && constraint.toString().length() > 0) { constraint = constraint.toString().toUpperCase(); ArrayList<HashMap<String, String>> filt = new ArrayList<HashMap<String, String>>(); for(int i = 0; i < tmpListItem.size(); i++) { HashMap<String, String> ylfn_i = tmpListItem.get(i); if( ylfn_i.get("ylfn_did").toUpperCase().contains(constraint) || ylfn_i.get("ylfn_name").toUpperCase().contains(constraint) || ylfn_i.get("gmsfz").toUpperCase().contains(constraint)) { filt.add(ylfn_i); } } retval.count = filt.size(); retval.values = filt; } return retval; } @Override protected void publishResults(CharSequence constraint, FilterResults retval) { //先清空旧数据 listItem.clear(); myAdapter.notifyDataSetChanged(); //再添加新数据 index=0; //过滤后重新分页，当前为第一页 listItem.addAll((ArrayList<HashMap<String, String>>)retval.values); myAdapter.notifyDataSetChanged(); checkButton(); }} ?