Kanchan Chowdhury Kanchan Chowdhury - 2 months ago 14
Android Question

Pull up to refresh in android RecyclerView

I have used the SwipeRefreshLayout of v4 support library according to the following way:

swipeRefreshLayout.setOnRefreshListener(new SwipeRefreshLayout.OnRefreshListener() {
@Override
public void onRefresh() {
refreshItems();
}
});

void refreshItems() {
Handler handler = new Handler();
handler.postDelayed(new Runnable() {
@Override
public void run() {
swipeRefreshLayout.setRefreshing(false);
}
}, 3000);
}


In this strategy, if I pull down the screen when first list item is visible then onRefresh() method is called.

enter image description here

This is called pull down to refresh. But I want the reverse effect. That is if I pull up the screen when last list item is visible then a method should be called or it should be notified anyway. Is it possible? If possible please provide me the way.

Answer Source

In your Adapter class of RecyclerView/ListView while inflating last item you can put if statement and call a method.

Code if you are using RecyclerView:-

private boolean loading = true;
int pastVisiblesItems, visibleItemCount, totalItemCount;

mRecyclerView.addOnScrollListener(new RecyclerView.OnScrollListener() 
{
    @Override
    public void onScrolled(RecyclerView recyclerView, int dx, int dy) 
    {
        if(dy > 0) //check for scroll down
        {
            visibleItemCount = mLayoutManager.getChildCount();
            totalItemCount = mLayoutManager.getItemCount();
            pastVisiblesItems = mLayoutManager.findFirstVisibleItemPosition();

            if (loading) 
            {
                if ( (visibleItemCount + pastVisiblesItems) >= totalItemCount) 
                {
                    loading = false;
                    Log.v("...", "Last Item Wow !");
                    //Do pagination.. i.e. fetch new data
                }
            }
        }
    }
});

Also add below code:-

LinearLayoutManager mLayoutManager;
mLayoutManager = new LinearLayoutManager(this);
mRecyclerView.setLayoutManager(mLayoutManager);