Я довольно новичок во фрагментации, но мой код кажется мне достаточно логичным, но все равно он либо вылетает, либо не дает никакого результата. Я не представляю, что с ним не так, я загружаю файл json из phpAPI, который включает в себя рекламу "annances", анализирующую их и перечисляющую в виде списка внутри фрагмента, вот мой класс фрагмента и адаптер
, если кто-то может сослаться на код, из которого я могу узнать, или дать подсказку, откудая ошибся с этим, спасибо
public class MainFragment extends Fragment{
private String URLstring = "http://192.168.1.38/api/annonce/read.php";
private static ProgressDialog mProgressDialog;
private ListView lv;
ArrayList<DataModel> dataModelArrayList = new ArrayList<DataModel> ();
private ListAdapter1 listAdapter1;
public static MainFragment newInstance() {
MainFragment fragment = new MainFragment();
return fragment;
}
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
}
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
View v=inflater.inflate(R.layout.main_fragment, container, false);
lv = v.findViewById(R.id.lv);
new JsonTask().execute(URLstring);
return v;
}
private class JsonTask extends AsyncTask<String, String, String> {
protected void onPreExecute() {
}
protected String doInBackground(String... params) {
HttpURLConnection connection = null;
BufferedReader reader = null;
try {
URL url = new URL(params[0]);
connection = (HttpURLConnection) url.openConnection();
connection.connect();
InputStream stream = connection.getInputStream();
reader = new BufferedReader(new InputStreamReader(stream));
StringBuffer buffer = new StringBuffer();
String line;
String file_name="";
while ((line = reader.readLine()) != null) {
try {
JSONObject dataobj = new JSONObject(line);
DataModel playerModel = new DataModel();
playerModel.setPhoto_principale(dataobj.getString("Photo_principale"));
playerModel.setTitre_annonce(dataobj.getString("Titre_annonce"));
playerModel.setDescription(dataobj.getString("Description"));
playerModel.setQuartier(dataobj.getString("Quartier"));
dataModelArrayList.add(playerModel);
}
catch (Exception e){}
buffer.append(line + "\n");
}
return buffer.toString();
} catch (MalformedURLException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
} finally {
if (connection != null) {
connection.disconnect();
}
try {
if (reader != null) {
reader.close();
}
} catch (IOException e) {
e.printStackTrace();
}
}
return null;
}
@Override
protected void onPostExecute(String result) {
super.onPostExecute(result);
setupListview();
}
}
private void setupListview(){
removeSimpleProgressDialog(); //will remove progress dialog
listAdapter1 = new ListAdapter1(getActivity(),dataModelArrayList); // Here we talk about getActivity() because you are using Fragment not
//an actual activity so you call it getActivity()
lv.setAdapter(listAdapter1);
}
public static void removeSimpleProgressDialog() {
try {
if (mProgressDialog != null) {
if (mProgressDialog.isShowing()) {
mProgressDialog.dismiss();
mProgressDialog = null;
}
}
} catch (IllegalArgumentException ie) {
ie.printStackTrace();
} catch (RuntimeException re) {
re.printStackTrace();
} catch (Exception e) {
e.printStackTrace();
}
}
}
Вот класс адаптера
public class ListAdapter1 extends BaseAdapter {
private Context context;
private ArrayList<DataModel> dataModelArrayList;
public ListAdapter1(Context context, ArrayList<DataModel> dataModelArrayList) {
this.context = context;
this.dataModelArrayList = dataModelArrayList;
}
@Override
public int getViewTypeCount() {
return getCount();
}
@Override
public int getItemViewType(int position) {
return position;
}
@Override
public int getCount() {
return dataModelArrayList.size();
}
@Override
public Object getItem(int position) {
return dataModelArrayList.get(position);
}
@Override
public long getItemId(int position) {
return 0;
}
@Override
public View getView(int position, View convertView, ViewGroup parent) {
ViewHolder holder;
if (convertView == null) {
holder = new ViewHolder();
LayoutInflater inflater = (LayoutInflater) context
.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
convertView = inflater.inflate(R.layout.item_list, null);
holder.photo_principale = (ImageView) convertView.findViewById(R.id.image);
holder.titre_annonce = (TextView) convertView.findViewById(R.id.titre_annonce);
holder.description = (TextView) convertView.findViewById(R.id.description);
holder.quartier = (TextView) convertView.findViewById(R.id.quartier);
convertView.setTag(holder);
}else {
// the getTag returns the viewHolder object set as a tag to the view
holder = (ViewHolder)convertView.getTag();
}
Picasso.get().load(dataModelArrayList.get(position).getPhoto_principale()).into(holder.photo_principale);
holder.titre_annonce.setText(dataModelArrayList.get(position).getTitre_annonce());
holder.description.setText(dataModelArrayList.get(position).getDescription());
holder.quartier.setText(dataModelArrayList.get(position).getQuartier());
return convertView;
}
private class ViewHolder {
// changed protected to public
public TextView titre_annonce, description, quartier;
public ImageView photo_principale;
}