From dfe09db990cdb32a5bb958b5409b068b3b46317a Mon Sep 17 00:00:00 2001
From: Andy Street <andrews@fb.com>
Date: Fri, 3 Mar 2017 03:36:24 -0800
Subject: [PATCH] Safely fix underline TextInput

Summary: Resubmit of https://github.com/facebook/react-native/pull/12493 factoring in the AOSP bug here: https://code.google.com/p/android/issues/detail?id=191754

Reviewed By: achen1

Differential Revision: D4627575

fbshipit-source-id: 8a984852db54be98bd6e781a4d00854d7d0dca68
---
 .../react/views/textinput/ReactTextInputManager.java  | 11 +++++++++--
 1 file changed, 9 insertions(+), 2 deletions(-)

diff --git a/ReactAndroid/src/main/java/com/facebook/react/views/textinput/ReactTextInputManager.java b/ReactAndroid/src/main/java/com/facebook/react/views/textinput/ReactTextInputManager.java
index 37edf2ec668..97d3b4b31ef 100644
--- a/ReactAndroid/src/main/java/com/facebook/react/views/textinput/ReactTextInputManager.java
+++ b/ReactAndroid/src/main/java/com/facebook/react/views/textinput/ReactTextInputManager.java
@@ -367,10 +367,17 @@ public class ReactTextInputManager extends BaseViewManager<ReactEditText, Layout
 
   @ReactProp(name = "underlineColorAndroid", customType = "Color")
   public void setUnderlineColor(ReactEditText view, @Nullable Integer underlineColor) {
+    // Drawable.mutate() can sometimes crash due to an AOSP bug:
+    // See https://code.google.com/p/android/issues/detail?id=191754 for more info
+    Drawable background = view.getBackground();
+    Drawable drawableToMutate = background.getConstantState() != null ?
+      background.mutate() :
+      background;
+
     if (underlineColor == null) {
-      view.getBackground().clearColorFilter();
+      drawableToMutate.clearColorFilter();
     } else {
-      view.getBackground().setColorFilter(underlineColor, PorterDuff.Mode.SRC_IN);
+      drawableToMutate.setColorFilter(underlineColor, PorterDuff.Mode.SRC_IN);
     }
   }