CODEWITHSUNDEEP
androidscrollviewlistenerhorizontalscrollview
Virthuss
Virthuss

Reputation: 3213

Is it possible to trigger an event when an element of my scroll view reach a certain position?

I'm using an HorizontalScroll view with android.

I would like to know if technically, it is possible to trigger an event (like changing the text of a textview ) when a specific element of my scrollview reach a certain position (for example when an element become the first visible element starting from the left of the scrollview).

Thanks in advance.

Upvotes: 1

Views: 301

Answers (1)

Rami
Rami

Reputation: 7929

You can do it in this way:

Rect scrollViewBounds = new Rect();
scrollView.getHitRect(scrollViewBounds);

if (yourElementView.getLocalVisibleRect(scrollViewBounds)) {
    // your element (or portion of it) is in visible area
    // you can trigger your event
} else {
    // your element is not in visible area
}

Upvotes: 2

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