@Override
public void onScroll(
AbsListView view, int firstVisibleItem, int visibleItemCount, int totalItemCount) {
boolean loadMoreRestaurants = firstVisibleItem + visibleItemCount >= totalItemCount;
boolean moreDataAvailable = (nextPageToken != null && !nextPageToken.equalsIgnoreCase(""));
if (loadMoreRestaurants && moreDataAvailable && !isLoadingMoreRestaurants) {
Log.v(
LOG_TAG,
"Load more restaurants request send and more restaurants are available. Loading.");
// Show the progress bar
onProgressBarShowRequestListener.showProgressBar();
isLoadingMoreRestaurants = true;
// The app is requesting for more data and there is more data available.
// Requesting them
Toast.makeText(context, R.string.loading_new_restaurants, Toast.LENGTH_LONG).show();
session.getRestaurantsNearbyNextPage(
nextPageToken,
new RequestRestaurantsCallback() {
@Override
public void done(
List<Restaurant> newRestaurants,
String newNextPageToken,
String errorMessage,
RequestStatus requestStatus) {
isLoadingMoreRestaurants = false;
// Disable the progress bar
onProgressBarShowRequestListener.hidePorgressBar();
if (!ErrorHandler.isError(requestStatus)) {
nextPageToken = newNextPageToken;
restaurantListAdapter.addMoreRestaurants(newRestaurants);
} else {
Toast.makeText(context, errorMessage, Toast.LENGTH_LONG).show();
// Remove the next page token saved
nextPageToken = null;
// If there is any error about Internet connection but the list of
// restaurants has been retrieved offLine, reset the list
if (requestStatus == RequestStatus.ERROR_REQUEST_NOK_HTTP_NO_CONNECTION
&& newRestaurants != null) {
showRestaurantList(newRestaurants);
}
}
}
});
}
}