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Mam ListView, w którym ładuję dane z SQLite, ustawiając limit 3 danych z SQLite podczas przewijania listy Użyłem AsyncTask do załadowania kolejnych 3 danych z bazy danych, ale po załadowaniu nowych danych pokazuje mi błąd: ArrayIndexOutOfBoundsException.Uzyskiwanie ArrayIndex poza granicami Wyjątek podczas dodawania nowych pozycji do listy podczas przewijania
Adapter:
public class FarmerAdapter extends BaseAdapter implements Filterable{
Context context;
ArrayList<Farmer> farmeritems;
ArrayList<Farmer> mStringFilterList;
ValueFilter valueFilter;
public FarmerAdapter(Context context, ArrayList<Farmer> list) {
this.context = context;
farmeritems = list;
mStringFilterList = list;
}
@Override
public int getCount() {
return farmeritems.size();
}
@Override
public Object getItem(int position) {
return farmeritems.get(position);
}
@Override
public long getItemId(int position) {
return position;
}
@Override
public int getViewTypeCount() {
return getCount();
}
@Override
public int getItemViewType(int position) {
return position;
}
@Override
public View getView(int position, View convertView, ViewGroup arg2) {
Farmer farmerdetails = farmeritems.get(position);
if (convertView == null) {
LayoutInflater inflater = (LayoutInflater) context
.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
convertView = inflater.inflate(R.layout.model_farmer, null);
}
final TextView farmname = (TextView) convertView.findViewById(R.id.tv_farmer_name);
final TextView farmmobno = (TextView) convertView.findViewById(R.id.tv_farmer_mobno);
final TextView farmlocation = (TextView) convertView.findViewById(R.id.tv_farmer_location);
final LinearLayout farmtrade = (LinearLayout) convertView.findViewById(R.id.li_farmer_trade);
final LinearLayout farmadvance = (LinearLayout) convertView.findViewById(R.id.li_farmer_advance);
final ImageView img_trade = (ImageView)convertView.findViewById(R.id.img_farmertrade);
final ImageView img_advance = (ImageView)convertView.findViewById(R.id.img_farmeradvance);
farmname.setText(farmerdetails.getFarmername());
farmmobno.setText(farmerdetails.getFarmermobno());
farmlocation.setText(farmerdetails.getFarmerlocation());
farmtrade.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
img_trade.setColorFilter(ContextCompat.getColor(context, R.color.colorAccent));
img_advance.clearColorFilter();
Intent b = new Intent(context, Farmer_simpletrade_Activity.class);
b.putExtra("fname", farmname.getText().toString());
b.putExtra("fmobno", farmmobno.getText().toString());
context.startActivity(b);
}
});
farmadvance.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
img_advance.setColorFilter(ContextCompat.getColor(context, R.color.colorAccent));
img_trade.clearColorFilter();
Intent c = new Intent(context, Farmer_simpleadvance_Activity.class);
c.putExtra("farmername", farmname.getText().toString());
c.putExtra("farmermobno", farmmobno.getText().toString());
context.startActivity(c);
((Activity) context).finish();
}
});
convertView.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
//todo disable the comments for farmer individual transaction
Intent a = new Intent(context, FarmerLedgerView_Activity.class);
a.putExtra("farmername", farmname.getText().toString());
a.putExtra("farmermobno", farmmobno.getText().toString());
context.startActivity(a);
((Activity) context).finish();
}
});
return convertView;
}
@Override
public Filter getFilter() {
if (valueFilter == null) {
valueFilter = new ValueFilter();
}
return valueFilter;
}
private class ValueFilter extends Filter {
@Override
protected FilterResults performFiltering(CharSequence constraint) {
FilterResults results = new FilterResults();
if (constraint != null && constraint.length() > 0) {
ArrayList<Farmer> filterList = new ArrayList<Farmer>();
for (int i = 0; i < mStringFilterList.size(); i++) {
if ((mStringFilterList.get(i).getFarmername().toUpperCase())
.contains(constraint.toString().toUpperCase())) {
Farmer farmer = new Farmer(mStringFilterList.get(i)
.getFarmername(), mStringFilterList.get(i)
.getFarmermobno(), mStringFilterList.get(i)
.getFarmerlocation());
filterList.add(farmer);
}
}
results.count = filterList.size();
results.values = filterList;
} else {
results.count = mStringFilterList.size();
results.values = mStringFilterList;
}
return results;
}
@Override
protected void publishResults(CharSequence constraint,
FilterResults results) {
farmeritems = (ArrayList<Farmer>) results.values;
notifyDataSetChanged();
}
}
public void setTransactionList(ArrayList<Farmer> newList) {
farmeritems = newList;
notifyDataSetChanged();
}
}
AsyncTask załadować dane z tłem:
private class LoadDataTask extends AsyncTask<Void, Void, Void> {
@Override
protected void onPreExecute() {
}
@Override
protected Void doInBackground(Void... params) {
if (isCancelled()) {
return null;
}
// Simulates a background task
try {
Thread.sleep(1000);
offSet=offSet+3;
if (offSet > totalcount) {
loadingMore=false;
} else {
Log.e("OffsetNo", String.valueOf(offSet));
databasehandler = new DatabaseHandler(getApplicationContext());
farmerlabels = new ArrayList<Farmer>();
String selectQuery = "SELECT * FROM farmercontactlabel ORDER BY farmername COLLATE NOCASE LIMIT " + offSet + "";
SQLiteDatabase db = databasehandler.getReadableDatabase();
Cursor cursor = db.rawQuery(selectQuery, null);
if (cursor.moveToFirst()) {
do {
Farmer farmerdetails = new Farmer();
farmerdetails.setFarmername(cursor.getString(1));
farmerdetails.setFarmermobno(cursor.getString(2));
farmerdetails.setFarmerlocation(cursor.getString(3));
list.add(farmerdetails);
} while (cursor.moveToNext());
}
cursor.close();
db.close();
}
} catch (InterruptedException e) {
e.printStackTrace();
}
return null;
}
@Override
protected void onPostExecute(Void result) {
fadapter.setTransactionList(list);
list_farmer.onLoadMoreComplete();
// fadapter.notifyDataSetChanged();
super.onPostExecute(result);
}
@Override
protected void onCancelled() {
// Notify the loading more operation has finished
list_farmer.onLoadMoreComplete();
}
}
struktury bazy danych:
String CREATE_FARMERS_TABLE = "CREATE TABLE " + FARMERCONTACT_LABELS + "("
+ FARMER_ID + " INTEGER,"
+ FARMER_NAME + " TEXT,"
+ FARMER_MOBNO + " NUMERIC PRIMARY KEY,"
+ FARMER_LOCATION + " TEXT" + ");";
db.execSQL(CREATE_FARMERS_TABLE);
Baza:
public ArrayList<Farmer> getAllfarmers(int offset) {
ArrayList<Farmer> farmerlabels = new ArrayList<Farmer>();
String selectQuery = "SELECT * FROM " + FARMERCONTACT_LABELS + " ORDER BY farmername COLLATE NOCASE LIMIT " + offset + "";
SQLiteDatabase db = this.getReadableDatabase();
Cursor cursor = db.rawQuery(selectQuery, null);
if (cursor.moveToFirst()) {
do {
Farmer farmerdetails = new Farmer();
farmerdetails.setFarmername(cursor.getString(1));
farmerdetails.setFarmermobno(cursor.getString(2));
farmerdetails.setFarmerlocation(cursor.getString(3));
farmerlabels.add(farmerdetails);
} while (cursor.moveToNext());
}
cursor.close();
db.close();
return farmerlabels;
}
Błąd:
java.lang.ArrayIndexOutOfBoundsException: length=3; index=3
at android.widget.AbsListView$RecycleBin.addScrapView(AbsListView.java:7103)
at android.widget.ListView.layoutChildren(ListView.java:1653)
at android.widget.AbsListView.onLayout(AbsListView.java:2230)
at android.view.View.layout(View.java:16001)
at android.view.ViewGroup.layout(ViewGroup.java:5181)
at android.widget.RelativeLayout.onLayout(RelativeLayout.java:1195)
at android.view.View.layout(View.java:16001)
w twoim AsyncTask gdzie jest zadeklarowana zmienna 'list', która jest używana w' liście.add (informacje o rolniku); 'Proszę również określić, co robisz w metodzie' onLoadMoreComplete() '. – Alex
proszę pokazać, gdzie zostało zadeklarowane i zainicjowane 'list' i' offset' –