From b2848a54b05470b3e258c935dd33b8c11a31b3c3 Mon Sep 17 00:00:00 2001
From: David Vacca <dvacca@fb.com>
Date: Tue, 9 Jan 2018 12:07:45 -0800
Subject: [PATCH] Adding support to float values for Android snapToInterval

Reviewed By: fkgozali

Differential Revision: D6684529

fbshipit-source-id: 51efa0a2d38acf4134bb824c462973e5c6bdf17a
---
 RNTester/js/ScrollViewSimpleExample.js                       | 2 +-
 .../react/views/scroll/ReactHorizontalScrollViewManager.java | 5 +++--
 2 files changed, 4 insertions(+), 3 deletions(-)

diff --git a/RNTester/js/ScrollViewSimpleExample.js b/RNTester/js/ScrollViewSimpleExample.js
index 56dd7745e..c3ac0786b 100644
--- a/RNTester/js/ScrollViewSimpleExample.js
+++ b/RNTester/js/ScrollViewSimpleExample.js
@@ -50,7 +50,7 @@ class ScrollViewSimpleExample extends React.Component<{}> {
       <ScrollView
         key={'scrollViewSnap'}
         horizontal
-        snapToInterval={210}
+        snapToInterval={210.0}
         pagingEnabled
       >
         {this.makeItems(NUM_ITEMS, [
diff --git a/ReactAndroid/src/main/java/com/facebook/react/views/scroll/ReactHorizontalScrollViewManager.java b/ReactAndroid/src/main/java/com/facebook/react/views/scroll/ReactHorizontalScrollViewManager.java
index e920e22b0..9b59dc6c5 100644
--- a/ReactAndroid/src/main/java/com/facebook/react/views/scroll/ReactHorizontalScrollViewManager.java
+++ b/ReactAndroid/src/main/java/com/facebook/react/views/scroll/ReactHorizontalScrollViewManager.java
@@ -73,9 +73,10 @@ public class ReactHorizontalScrollViewManager
   }
 
   @ReactProp(name = "snapToInterval")
-  public void setSnapToInterval(ReactHorizontalScrollView view, int snapToInterval) {
+  public void setSnapToInterval(ReactHorizontalScrollView view, float snapToInterval) {
+    // snapToInterval needs to be exposed as a float because of the Javascript interface.
     DisplayMetrics screenDisplayMetrics = DisplayMetricsHolder.getScreenDisplayMetrics();
-    view.setSnapInterval((int)(snapToInterval * screenDisplayMetrics.density));
+    view.setSnapInterval((int) (snapToInterval * screenDisplayMetrics.density));
   }
 
   @ReactProp(name = ReactClippingViewGroupHelper.PROP_REMOVE_CLIPPED_SUBVIEWS)