I have a listview being populated with data from the server. If I use wifi connection everything works fine.
Is there anything that I could do to improve this code to wait until the data is full loaded from the server with bad connections like 3G or poor wifi connection?
Sometimes listview gets empty.
public class LoadAsync extends AsyncTask<String, Boolean, Boolean>{
public ProgressDialog pDialog;
@Override
protected void onPreExecute() {
super.onPreExecute();
pDialog = new ProgressDialog(ListEvents.this);
pDialog.setMessage("Loading...");
pDialog.setIndeterminate(false);
pDialog.setCancelable(true);
pDialog.show();
}
@Override
protected Boolean doInBackground(String... params) {
// Creating volley request obj
JsonArrayRequest eventReq = new JsonArrayRequest(url,
new Response.Listener<JSONArray>() {
@Override
public void onResponse(JSONArray response) {
Log.d(TAG, response.toString());
pDialog.dismiss();
// Parsing json
for (int i = 0; i < response.length(); i++) {
try {
JSONObject obj = response.getJSONObject(i);
Event event = new Event();
event.setImovel_id(obj.getString("imovel_id"));
event.setThumbnailUrl(obj.getString("arquivo"));
event.setNegocio(obj.getString("negocio"));
event.setImovel(obj.getString("imovel"));
event.setMobilia(obj.getString("mobilia"));
event.setGaragem(obj.getString("garagem"));
event.setPreco(obj.getString("preco"));
city = obj.getString("city").trim();
statee = obj.getString("state").trim();
checkNegocio = obj.getString("negocio").trim();
checkImovel = obj.getString("imovel").trim();
checkMobilia = obj.getString("mobilia").trim();
checkGaragem = obj.getString("garagem").trim();
checkPreco = obj.getString("preco").trim();
checkPreco = checkPreco.replace("R", "");
checkPreco = checkPreco.replaceAll("[$.,]", "");
int serverprice = Integer.parseInt(checkPreco);
String app_price = checkP.getText().toString();
app_price = app_price.replace("R", "");
app_price = app_price.replaceAll("[$.,]", "");
int i_price = Integer.parseInt(app_price);
if(estado.getText().toString().trim().equalsIgnoreCase(statee) &&
cidade.getText().toString().trim().equalsIgnoreCase(city) &&
checkN.getText().toString().trim().equalsIgnoreCase(checkNegocio)){
if(/*checkI.getText().toString().equalsIgnoreCase(checkImovel) ||
checkM.getText().toString().equalsIgnoreCase(checkMobilia) ||
checkG.getText().toString().equalsIgnoreCase(checkGaragem) ||*/
serverprice <= i_price){
// adding event to events array
eventList.add(event);
}
}
} catch (JSONException e) {
e.printStackTrace();
}
} if(eventList.size() > 0){
listView.setAdapter(adapter);
listView.setTextFilterEnabled(true);
}else{
noEvent.setText("Nothing found.");
}
// notifying list adapter about data changes
// so that it renders the list view with updated data
adapter.notifyDataSetChanged();
}
}, new Response.ErrorListener() {
@Override
public void onErrorResponse(VolleyError error) {
VolleyLog.d(TAG, "Error: " + error.getMessage());
pDialog.dismiss();
}
});
// Adding request to request queue
AppController.getInstance().addToRequestQueue(eventReq);
listView.setOnItemClickListener(new OnItemClickListener() {
@Override
public void onItemClick(AdapterView<?> parent, View view,
int position, long id) {
String imovelID = ((TextView) view.findViewById(R.id.imovel_id)).getText().toString();
ImageView eFile = ((ImageView) view.findViewById(R.id.thumbnail));
String imgUrl = (String) eFile.getTag();
String negocio = ((TextView) view.findViewById(R.id.negocio)).getText().toString();
String imovel = ((TextView) view.findViewById(R.id.imovel)).getText().toString();
String mobilia = ((TextView) view.findViewById(R.id.mobilia)).getText().toString();
String garagem = ((TextView) view.findViewById(R.id.garagem)).getText().toString();
String preco = ((TextView) view.findViewById(R.id.preco)).getText().toString();
Intent i = new Intent(getApplicationContext(), EventDetails.class);
i.putExtra(TAG_ID, imovelID);
i.putExtra(TAG_ARQUIVO, imgUrl);
i.putExtra(TAG_NEGOCIO, negocio);
i.putExtra(TAG_IMOVEL, imovel);
i.putExtra(TAG_MOBILIA, mobilia);
i.putExtra(TAG_GARAGEM, garagem);
i.putExtra(TAG_PRECO, preco);
startActivity(i);
}
});
return null;
}
@Override
protected void onPostExecute(Boolean result) {
super.onPostExecute(result);
//pDialog.dismiss();
}
}
