我正在开发一个Android应用程序。该应用程序使用Listview中的json和ListAdpter绑定数据。现在我想根据用户在搜索框中写信来过滤该数据。我试图这样做，但由于多个数据绑定在listview中，我不知道如何过滤它。以下是我的代码：
private void getdatalatlog(double latitude, double longitude) {
// TODO Auto-generated method stub
//value=5;
String url = "http://bizzcoder.co.in/php/comments.php?latitude='"+latitude+"'&longitude='"+longitude+"'&value='"+value+"'";
aq.progress(R.id.progressBar1).ajax(url, JSONObject.class, this,"jsonCallback");
}
public void jsonCallback(String url, JSONObject json, AjaxStatus status) {
if (json != null) {
List<String> city = new ArrayList<String>();
mCommentList = new ArrayList<HashMap<String, String>>();
Gson gson = new GsonBuilder().create();
try {
JSONArray jsonResponse = json.getJSONArray("posts");
city = gson.fromJson(jsonResponse.toString(),List.class);
for (int i = 0; i < jsonResponse.length(); i++) {
JSONObject c = jsonResponse.getJSONObject(i);
String title = c.getString(TAG_TITLE);
String content = c.getString(TAG_MESSAGE);
String username = c.getString(TAG_USERNAME);
String lat = c.getString(TAG_LATITUDE);
String log = c.getString(TAG_LONGITUDE);
String cont = c.getString(TAG_CONTACT);
// creating new HashMap
HashMap<String, String> map = new HashMap<String, String>();
map.put(TAG_TITLE, title);
map.put(TAG_MESSAGE, content);
map.put(TAG_USERNAME, username);
map.put(TAG_LATITUDE, lat);
map.put(TAG_LONGITUDE, log);
map.put(TAG_CONTACT, cont);
// adding HashList to ArrayList
mCommentList.add(map);
}
}
catch (JSONException e) {
Toast.makeText(aq.getContext(), "Error in parsing JSON", Toast.LENGTH_LONG).show();
}
catch (Exception e) {
Toast.makeText(aq.getContext(), "Something went wrong", Toast.LENGTH_LONG).show();
}
ListAdapter adapter = new SimpleAdapter(this, mCommentList,
R.layout.single_post, new String[] { TAG_TITLE,TAG_USERNAME ,TAG_CONTACT ,TAG_MESSAGE ,TAG_LATITUDE , TAG_LONGITUDE
}, new int[] { R.id.shop_name,R.id.address,R.id.contact,R.id.distance,R.id.latitude,R.id.longitude });
setListAdapter(adapter);
/**
* Enabling Search Filter
* */
inputSearch.addTextChangedListener(new TextWatcher() {
@Override
public void onTextChanged(CharSequence cs, int arg1, int arg2, int arg3) {
// When user changed the Text
Shopdetail.this.adapter.getFilter().filter(cs);
}
@Override
public void beforeTextChanged(CharSequence arg0, int arg1, int arg2,
int arg3) {
// TODO Auto-generated method stub
}
@Override
public void afterTextChanged(Editable arg0) {
// TODO Auto-generated method stub
}
});
ListView lv = getListView();
lv.setOnItemClickListener(new OnItemClickListener() {
@Override
public void onItemClick(AdapterView<?> parent, View view,
int position, long id) {
Intent intent = new Intent();
Bundle b = new Bundle();
String name= ((TextView) view.findViewById(R.id.shop_name)).getText().toString()+" , "+((TextView) view.findViewById(R.id.contact)).getText().toString();
String lati= ((TextView) view.findViewById(R.id.latitude)).getText().toString();
String longi= ((TextView) view.findViewById(R.id.longitude)).getText().toString();
b.putString("shop",name);
b.putString("lati",lati);
b.putString("long",longi);
intent.setClass(Shopdetail.this, Mapview.class);
intent.putExtras(b);
startActivity(intent);
}
});
}
}
列表视图中有多个详细信息，例如商店名称，联系电话，地址等。我想仅按商店名称过滤它。但我在getfilter（）方法下面用红线。
答案 0 :(得分：0)
实际上我是这样做的（EditText在工具栏上，但它可以在任何你想要的地方）：
inputSearch = (EditText) findViewById(R.id.inputSearch);
inputSearch.addTextChangedListener(new TextWatcher() {
@Override
public void onTextChanged(CharSequence cs, int arg1, int arg2, int arg3) {
// When user changed the Text
adapter.getFilter().filter(cs.toString());
}
@Override
public void beforeTextChanged(CharSequence arg0, int arg1, int arg2,
int arg3) {
// TODO Auto-generated method stub
}
@Override
public void afterTextChanged(Editable arg0) {
// TODO Auto-generated method stub
}
});
编辑：
要过滤自定义Base适配器，您必须使用适配器将其放入类中：
List<Fanfic> fanfics;
private List<Fanfic>filteredData = null;
private ItemFilter mFilter = new ItemFilter();
您需要2个列表 - 第一个包含所有数据，第二个包含过滤数据
在所有方法中，您必须使用filteredData（在构造函数中，getCount，getItem，getItemId），而不是您刚刚填充构造函数的过滤数据。
这是ItemFilter类：
private class ItemFilter extends Filter {
@Override
protected FilterResults performFiltering(CharSequence constraint) {
String filterString = constraint.toString().toLowerCase();
FilterResults results = new FilterResults();
final List<Fanfic> list = fanfics;
int count = list.size();
final ArrayList<Fanfic> nlist = new ArrayList<Fanfic>(count);
String filterableString ;
for (int i = 0; i < count; i++) {
filterableString = list.get(i).getName();
if (filterableString.toLowerCase().startsWith(filterString)) {
nlist.add(list.get(i));
}
}
results.values = nlist;
results.count = nlist.size();
return results;
}
@SuppressWarnings("unchecked")
@Override
protected void publishResults(CharSequence constraint, FilterResults results) {
filteredData = (ArrayList<Fanfic>) results.values;
notifyDataSetChanged();
}
}
将此方法添加到适配器：
public Filter getFilter() {
return mFilter;
}
最后一件事，你必须实现Filterable。