From ba3ea0ef837d9ce484e1822e58a965b5879eb379 Mon Sep 17 00:00:00 2001
From: Jacky Zhen <jacky.s.zhen@gmail.com>
Date: Wed, 13 Mar 2019 14:40:58 +1300
Subject: [PATCH] fix tab not scrolled to correct position when index > 0 on
 android

Because `contentOffset` on ScrollView is not implemented on android. See https://github.com/facebook/react-native/issues/6849
---
 index.js | 12 ++++++++++++
 1 file changed, 12 insertions(+)

diff --git a/index.js b/index.js
index 64d6c5a1..fee9de0c 100644
--- a/index.js
+++ b/index.js
@@ -128,6 +128,17 @@ const ScrollableTabView = createReactClass({
     return child.props.tabLabel + '_' + idx;
   },
 
+  _handleContentSizeChange() {
+    this._handleContentSizeChange = null;
+
+    if (Platform.OS === "android" && this.scrollView) {
+      const { currentPage, containerWidth } = this.state;
+      console.log(currentPage, containerWidth);
+      const offset = currentPage * this.state.containerWidth;
+      this.scrollView.scrollTo({x: offset, y: 0, animated: false });
+    }
+  },
+
   renderScrollableContent() {
     const scenes = this._composeScenes();
     return <ScrollView
@@ -149,6 +160,7 @@ const ScrollableTabView = createReactClass({
       directionalLockEnabled
       alwaysBounceVertical={false}
       keyboardDismissMode="on-drag"
+      onContentSizeChange={this._handleContentSizeChange}
       {...this.props.contentProps}
     >
       {scenes}