Scrollview: check if a view is visible on screen or not

Question

I have a ScrollView defined like:

<ScrollView
    ... 
    .../>
    <LinearLayout
        ...
        ...>

        <!-- content -->

    </LinearLayout>
</ScrollView>

And I fill the LinearLayout dynamically with some ImageViews. Now, is there a way to check when an ImageView gets visible or invisible (for example when i scroll down)?

Check out this answer: [http://stackoverflow.com/a/12428208/798634](http://stackoverflow.com/a/12428208/798634) — Matt K, Apr 23 '14 at 14:01
This post might help: [http://stackoverflow.com/questions/4628800/android-how-to-check-if-a-view-inside-of-scrollview-is-visible][1] [1]: http://stackoverflow.com/questions/4628800/android-how-to-check-if-a-view-inside-of-scrollview-is-visible — Steve Waring, Aug 27 '14 at 07:58
Check this answer https://stackoverflow.com/questions/4628800/android-how-to-check-if-a-view-inside-of-scrollview-is-visible/47280300#47280300 — Himanshu, Nov 14 '17 at 09:15

score 31 · Answer 1 · edited Oct 17 '16 at 23:30

31

To check if the view is fully/partially visible you can use :

boolean isViewVisible = view.isShown();

To determine if it is fully visible use below approach:

Rect rect = new Rect();
if(view.getGlobalVisibleRect(rect) 
    && view.getHeight() == rect.height() 
    && view.getWidth() == rect.width() ) {
    // view is fully visible on screen
}

edited Oct 17 '16 at 23:30

gio

4,950
3
32
46

answered Sep 08 '16 at 13:24

Akash Dubey

327
4
5

1

I could find a case to have `view.getGlobalVisibleRect(rect)` return true :( – Farid Jan 25 '19 at 07:03

score 9 · Answer 2 · answered Nov 01 '17 at 21:37

I will forward you to this answer:

If the image is part of the layout it might be "View.VISIBLE" but that doesn't mean it's within the confines of the visible screen. If that's what you're after; this will work:

Rect scrollBounds = new Rect();
scrollView.getHitRect(scrollBounds);
if (imageView.getLocalVisibleRect(scrollBounds)) {
    // imageView is within the visible window
} else {
    // imageView is not within the visible window
}

score 3 · Answer 3 · answered Aug 13 '21 at 11:48

I struggled a lot to get an accurate answer and th following solved my problem

final ScrollView scrollView = findViewById(R.id.scrollView);

scrollView.getViewTreeObserver().addOnScrollChangedListener(new ViewTreeObserver.OnScrollChangedListener() {
            @Override
            public void onScrollChanged() {
                Rect scrollBounds = new Rect();
                scrollView.getHitRect(scrollBounds);
                if (yourImageView.getLocalVisibleRect(scrollBounds)) {
                    // The ImageView is Visible on the screen while scrolling
                } else {
                    // The ImageView is not Visible on the screen while scrolling
            }
            }
        });

The code within the OnScrollChangedListener keeps checking if the Imageview is visible and shown on the screen and once you scroll and the imageview is not visible it gets detected immediately

Scrollview: check if a view is visible on screen or not

3 Answers3