Detecting the scrolling direction in the adapter (up/down)

Question

I am trying to mimic the Google Plus application in my project, as it seems to be the reference now.

The listview effect when scrolling is really nice and I would li

Answer 1

General solution that doesn't rely on positions of views/etc. Just check the vertical scroll offset and compare it to the previous scroll offset. If the new value is greater than the old the user is scrolling down, and vice-versa.

// [START check vertical scroll direction]
int oldScrollOffset = 0;

listView.setOnScrollChangeListener(new View.OnScrollChangeListener() {
        @Override
        public void onScrollChange(View view, int i, int i1, int i2, int i3) {

            Boolean scrollDirectionDown;

            int newScrollOffset = listView.computeVerticalScrollOffset();

            if (newScrollOffset > oldScrollOffset) {
                scrollDirectionDown = true;
            } else {
                scrollDirectionDown = false;
            }

            oldScrollOffset = newScrollOffset;

            if (scrollDirectionDown) {
                // Update accordingly for scrolling down
                Log.d(TAG, "scrolling down");
            } else {
                // Update accordingly for scrolling up
                Log.d(TAG, "scrolling up");
            }

    });
// [END check vertical scroll direction]