I already tried to implement the endless scrolling for LinearLayoutManager and it is successful and tried to copy the LinearLayoutManager implementation to StaggeredGridLayoutMa
To implement EndlessRecyclerOnScrollListener first create EndlessRecyclerOnScrollListener java class
import android.support.v7.widget.GridLayoutManager;
import android.support.v7.widget.LinearLayoutManager;
import android.support.v7.widget.RecyclerView;
import android.support.v7.widget.StaggeredGridLayoutManager;
public abstract class EndlessRecyclerOnScrollListener extends RecyclerView.OnScrollListener {
public static String TAG = EndlessRecyclerOnScrollListener.class.getSimpleName();
private int scrolledDistance = 0;
private boolean controlsVisible = false;
private boolean loading = true; // True if we are still waiting for the last set of data to load.
private int visibleThreshold = 5; // The minimum amount of items to have below your current scroll position before loading more.
private int pastVisibleItems, visibleItemCount, totalItemCount;
private int current_page = 1;
private StaggeredGridLayoutManager mStaggeredGridLayoutManager;
public EndlessRecyclerOnScrollListener(StaggeredGridLayoutManager staggeredGridLayoutManager) {
this.mStaggeredGridLayoutManager = staggeredGridLayoutManager;
}
@Override
public void onScrolled(RecyclerView recyclerView, int dx, int dy) {
super.onScrolled(recyclerView, dx, dy);
visibleItemCount = recyclerView.getChildCount();
totalItemCount = mStaggeredGridLayoutManager.getItemCount();
//firstVisibleItem = mStaggeredGridLayoutManager.findFirstVisibleItemPosition();
int[] firstVisibleItems = null;
firstVisibleItems = mStaggeredGridLayoutManager.findFirstVisibleItemPositions(firstVisibleItems);
if (firstVisibleItems != null && firstVisibleItems.length > 0) {
pastVisibleItems = firstVisibleItems[0];
}
if (loading) {
if ((visibleItemCount + pastVisibleItems) >= totalItemCount) {
loading = false;
previousTotal = totalItemCount;
}
}
if (!loading && (totalItemCount - visibleItemCount)
<= (pastVisibleItems + visibleThreshold)) {
// End has been reached
// Do something
current_page++;
onLoadMore(current_page);
loading = true;
}
if (scrolledDistance > 1 && controlsVisible) {
controlsVisible = false;
scrolledDistance = 0;
} else if (scrolledDistance < -1 && !controlsVisible) {
controlsVisible = true;
scrolledDistance = 0;
}
if ((controlsVisible && dy > 0) || (!controlsVisible && dy < 0)) {
scrolledDistance += dy;
}
}
public abstract void onLoadMore(int current_page);
;
}
After into your activity or fragment (this example is for fragment) use the next code
RecyclerView mRecyclerView;
StaggeredGridLayoutManager mStaggeredGridLayoutManager;
private RecyclerView.Adapter adapter;
public View onCreateView(LayoutInflater inflater, @Nullable ViewGroup container, @Nullable Bundle saveInstanceState) {
View v = inflater.inflate(R.layout.notices_layout, container, false);
mRecyclerView = (RecyclerView) v.findViewById(R.id.listaNoticias);
mStaggeredGridLayoutManager = new StaggeredGridLayoutManager(
2, //number of grid columns
GridLayoutManager.VERTICAL);
//Sets the gap handling strategy for StaggeredGridLayoutManager
mStaggeredGridLayoutManager.setGapStrategy(StaggeredGridLayoutManager.GAP_HANDLING_NONE);
mRecyclerView.setLayoutManager(mStaggeredGridLayoutManager);
//initializing our adapter
adapter = new MyAdapter(list, getContext());
//Adding adapter to recyclerview
mRecyclerView.setAdapter(adapter);
mRecyclerView.setOnScrollListener(new EndlessRecyclerOnScrollListener(mStaggeredGridLayoutManager) {
@Override
public void onLoadMore(int current_page) {
// do something...
getData(current_page);
}
});
return v;
}