นี่คือปัญหาของฉัน:
ฉันกำลังพยายามกรอง ListView แบบยาวซึ่งชาร์จล่วงหน้าด้วยฐานข้อมูลด้วย Custom ArrayAdapter ที่ใช้งานแบบกรองได้ ฉันตั้งค่าให้กรองด้วย ActionBar SearchView ข้อตกลงคือเมื่อหลังจากทำการกรอง (การดีบักฉันรู้ว่ามันทำได้ดี) มุมมองรายการของฉันไม่ใช่ ไม่รีเฟรชรายการใหม่ (รายการที่ถูกกรอง) นี่คือรหัสของฉัน:
CategoriesActivity.java
public class CategoriesActivity extends Activity implements OnQueryTextListener {
ListView lista;
String datos;
private ProgressDialog pDialog;
List<Categoria> elementos;
ArrayAdapter<Categoria> adaptador;
SharedPreferences settings;
SearchView mSearchView;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_categories);
settings = PreferenceManager.getDefaultSharedPreferences(this);
new CargarListView().execute();
}
public class CargarListView extends AsyncTask<String, Void, String>{
@Override
protected void onPreExecute() {
super.onPreExecute();
pDialog = new ProgressDialog(CategoriesActivity.this);
pDialog.setCancelable(true);
pDialog.setMessage("Cargando categorias...");
pDialog.setProgressStyle(ProgressDialog.STYLE_SPINNER);
pDialog.setProgress(0);
pDialog.show();
}
protected String doInBackground(String... Strings) {
HttpClient httpclient = new DefaultHttpClient();
/*Creamos el objeto de HttpClient que nos permitira conectarnos mediante peticiones http*/
//HttpPost httppost = new HttpPost("http://myurl.com/app/callajax.php");
HttpPost httppost = new HttpPost("http://myurl.com/list_category.php");
/*El objeto HttpPost permite que enviemos una peticion de tipo POST a una URL especificada*/
String text = "";
try {
/*Una vez añadidos los parametros actualizamos la entidad de httppost, esto quiere decir en pocas palabras anexamos los parametros al objeto para que al enviarse al servidor envien los datos que hemos añadido*/
/*Finalmente ejecutamos enviando la info al server*/
HttpResponse resp = httpclient.execute(httppost);
HttpEntity ent = resp.getEntity();/*y obtenemos una respuesta*/
text = EntityUtils.toString(ent);
} catch (ClientProtocolException e) {
e.printStackTrace();
text = "error";
} catch (IOException e) {
e.printStackTrace();
text = "error";
}
return text;
}
@Override
protected void onPostExecute(String result) {
super.onPostExecute(result);
if (result != null ) {
try {
JSONArray Jarr = new JSONArray(result);
JSONObject datos = Jarr.getJSONObject(0);
JSONArray jArray = datos.getJSONArray("data");
elementos = new ArrayList<Categoria>();
int sum = 0;
for(int i=0; i < jArray.length(); i++) {
String titulo = jArray.getJSONObject(i).getString("title");
String id = jArray.getJSONObject(i).getString("id");
String cantidad = jArray.getJSONObject(i).getString("count");
elementos.add(new Categoria(id, titulo, cantidad));
sum += Integer.valueOf(cantidad);
}
elementos.add(0, new Categoria("1", "En todos", String.valueOf(sum)));
//Instancia del ListView
lista = (ListView)findViewById(R.id.listView1);
//Inicializar el adaptador con la fuente de datos
adaptador = new CategoriaArrayAdapter(CategoriesActivity.this, elementos);
//Relacionando la lista con el adaptador
lista.setTextFilterEnabled(true);
lista.setAdapter(adaptador);
lista.setFastScrollEnabled(true);
lista.setOnItemClickListener( new OnItemClickListener() {
@Override
public void onItemClick(AdapterView<?> parent, View view,int position, long id) {
Categoria Opcion = (Categoria)adaptador.getItem(position);
Toast.makeText(getApplicationContext(), "Categoria: "+Opcion.getTitulo(), Toast.LENGTH_SHORT).show();
Editor edit = settings.edit();
edit.putString("PREF_CATEGORY", Opcion.getId());
edit.apply();
finish();
}
});
}catch (JSONException e) {
e.printStackTrace();
}
}
pDialog.dismiss();
}
}
@Override
public boolean onCreateOptionsMenu(Menu menu) {
// Inflate the menu; this adds items to the action bar if it is present.
getMenuInflater().inflate(R.menu.categories, menu);
MenuItem searchItem = menu.findItem(R.id.action_search);
mSearchView = (SearchView) searchItem.getActionView();
setupSearchView(searchItem);
return true;
}
private void setupSearchView(MenuItem searchItem) {
// TODO Auto-generated method stub
mSearchView.setOnQueryTextListener(this);
}
@Override
public boolean onQueryTextSubmit(String query) {
// TODO Auto-generated method stub
return false;
}
@Override
public boolean onQueryTextChange(String newText) {
// TODO Auto-generated method stub
adaptador.getFilter().filter(newText);
return false;
}
CategoriesArrayAdapter.java
public class CategoriaArrayAdapter extends ArrayAdapter<Categoria> implements Filterable {
List<Categoria> original;
List<Categoria> filtered;
public CategoriaArrayAdapter(Context context, List<Categoria> objects) {
super(context, 0, objects);
this.original = objects;
}
@Override
public View getView(int position, View convertView, ViewGroup parent){
//Obteniendo una instancia del inflater
LayoutInflater inflater = (LayoutInflater)getContext()
.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
//Salvando la referencia del View de la fila
View listItemView = convertView;
//Comprobando si el View no existe
if (null == convertView) {
//Si no existe, entonces inflarlo con cat_list_view.xml
listItemView = inflater.inflate(
R.layout.cat_list_item,
parent,
false);
}
//Obteniendo instancias de los elementos
TextView titulo = (TextView)listItemView.findViewById(R.id.txtCat);
TextView cantidad = (TextView)listItemView.findViewById(R.id.txtCantcat);
//Obteniendo instancia de la Tarea en la posición actual
Categoria item = getItem(position);
titulo.setText(item.getTitulo());
cantidad.setText("("+item.getCantidad()+")");
return listItemView;
}
@Override
public Filter getFilter() {
Filter filter = new Filter() {
@Override
protected FilterResults performFiltering(CharSequence constraint) {
FilterResults filterResults = new FilterResults();
//constraint is the result from text you want to filter against.
//objects is your data set you will filter from
if(constraint != null && original !=null) {
int length= original.size();
filtered.clear();
for (int i = 0; i<length; i++){
Locale locale = Locale.getDefault();
Categoria item = original.get(i);
String data = item.getTitulo();
if (data.toLowerCase(locale).contains(constraint.toString())) {
filtered.add(item);
}
}
filterResults.values = filtered;
filterResults.count = filtered.size();
}else{
filterResults.count = original.size();
filterResults.values = original;
}
return filterResults;
}
@Override
protected void publishResults(CharSequence constraint, FilterResults results) {
original = (List<Categoria>) results.values;
if (results.count > 0) {
notifyDataSetChanged();
} else {
notifyDataSetInvalidated();
}
}
};
return filter;
}
}
ฉันพลาดอะไรไปหรือเปล่า??? ฉันต้องการความช่วยเหลือจริงๆ เกี่ยวกับเรื่องนี้...
