Android scroll up hide view and scroll down show view effect like twitter

Question

How to do scrolling effect like twitter when scroll Up hide viewpager tab (Home, Discover, activity). Or effect like facebook scrolling, while scroll up hide option view(status, photo, checkin) when scroll down show option view. Any example link will do please help.

Answer 1

Easy solution:

public abstract class OnScrollObserver implements AbsListView.OnScrollListener {

public abstract void onScrollUp();

public abstract void onScrollDown();

@Override
public void onScrollStateChanged(AbsListView view, int scrollState) {
}

int last = 0;
boolean control = true;

@Override
public void onScroll(AbsListView view, int current, int visibles, int total) {
    if (current < last && !control) {
        onScrollUp();
        control = true;
    } else if (current > last && control) {
        onScrollDown();
        control = false;
    }

    last = current;
}

Usage:

listView.setOnScrollListener(new OnScrollObserver() {
        @Override
        public void onScrollUp() {

        }

        @Override
        public void onScrollDown() {

        }
    });