How to use

keyAt

method

in

androidx.collection.LongSparseArray

long thisKey = modelsById.keyAt(i);
long thatKey = that.modelsById.keyAt(i);

long key = layerMap.keyAt(i);
BaseLayer layerView = layerMap.get(key);

public long[] getCheckedItemIds() {
  final LongSparseArray<Integer> idStates = checkedIdStates;
  if (idStates == null) {
    return new long[0];
  }
  final int count = idStates.size();
  final long[] ids = new long[count];
  for (int i = 0; i < count; i++) {
    ids[i] = idStates.keyAt(i);
  }
  return ids;
}

@Override
public void writeToParcel(Parcel out, int flags) {
  out.writeInt(checkedItemCount);
  out.writeSparseBooleanArray(checkStates);
  final int n = checkedIdStates != null ? checkedIdStates.size() : -1;
  out.writeInt(n);
  for (int i = 0; i < n; i++) {
    out.writeLong(checkedIdStates.keyAt(i));
    out.writeInt(checkedIdStates.valueAt(i));
  }
}

final long id = checkedIdStates.keyAt(checkedIndex);
final int lastPos = checkedIdStates.valueAt(checkedIndex);