Android: Blocking swipe-to-refresh on minimized AppBar

If you are designing an User-Interface that is using a CollapsingToolbarLayout and SwipeReshLayout, you may notice discomfort when flipping down the content, seen in CollapsingToolbarLayout that immediately trigger swipe-to-refresh.

Here I'm sharing a code below.

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/** * Block SwipeRefreshLayout in collapsed and idle state. */ public class AppBarRefreshAdjustListener implements AppBarLayout.OnOffsetChangedListener { private static final long BLOCK_DELAY = 1000L; private final SwipeRefreshLayout mSwipeRefreshLayout; private int mVerticalOffset; private Handler mHandler = new Handler(); public AppBarRefreshAdjustListener(SwipeRefreshLayout refreshLayout) { mSwipeRefreshLayout = refreshLayout; handleOffsetChanged(mVerticalOffset); } @Override public void onOffsetChanged(AppBarLayout appBarLayout, int verticalOffset) { handleOffsetChanged(verticalOffset); } private void handleOffsetChanged(int verticalOffset) { if (verticalOffset == 0) { mHandler.removeCallbacksAndMessages(null); mHandler.postDelayed(() -> { mSwipeRefreshLayout.setEnabled(mVerticalOffset == 0); }, BLOCK_DELAY); } else { mSwipeRefreshLayout.setEnabled(false); } mVerticalOffset = verticalOffset; } }

This class solves the problem - blocking SwipeRefreshLayout on clotting time / AppBar deployment:

1	appBarLayout addOnOffsetChangedListener (new AppBarRefreshAdjustListener (swipeRefreshLayout) );