scrollResponderZoomTo does not work in Android

[shaneosullivan]

Issue Description

ScrollResponder.scrollResponderZoomTo only works in iOS. This prevents the programmatic control of zoom in ScrollViews.

It contains the code
if (Platform.OS === 'android') {
invariant('zoomToRect is not implemented');
}

Steps to Reproduce / Code Snippets

Simply call the scrollResponderZoomTo on any ScrollView component, e.g.

this.refs.scrollView.scrollResponderZoomTo({
x: 1,
y: 1,
width: 400,
height: 800,
animated: false,
});

Expected Results

It should zoom to the desired rectangle. However it throws an error with an invariant.

Additional Information

• React Native version: 0.3.2
• Platform(s) (iOS, Android, or both?): Android
• Operating System (macOS, Linux, or Windows?): MacOS, Linux & Windows

[jmurzy]

This is a limitation of the Android ScrollView. It doesn't have built-in support for zooming or multi-directional scrolling.

[shaneosullivan]

Understood. However from the point of view of Arab, this is a problem that
we should track and fix at some point. Not being able to zoom images is a
huge limitation of the framework.

If an additional native component is needed, we should track that work

On Sunday, October 9, 2016, Jake Murzy notifications@github.com wrote:

This is a limitation of the Android ScrollView. It doesn't have built-in
support for zooming or multi-directional scrolling.

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[jmurzy]

Agreed. I'm currently working on reimplementing UIScrollView in JavaScript. IMO this is ultimately the best way to achieve feature parity between native platforms. l will update here when if I make noteworthy progress.

🍺

[lacker]

This is definitely a good feature to have. We are trying to keep github issues focused on bug reports, though, and use Product Pains for feature requests, so I think we should close this issue. It's also somewhat stale and it's unclear at least to me how one would plausibly solve it (I suspect ScrollView in JS will have a lot of tradeoffs). But if someone had a PR for this that would be cool!

[toearth]

@jmurzy Do you reimplemt the new one ?

[ahmetabdi]

+1

[yuunusdurmus]

+1

[ugurcanomur]

+1

[ismailbayram]

+1 please help us! that is a huge PROBLEM!!!!

[escalepion]

+1

[mertsalik]

+1

[eneskaplan]

+1 !