From 60bb2d3e3b0ab343e12cf86c0fb83c777626c235 Mon Sep 17 00:00:00 2001
From: Notzuonotdied <17824539+Notzuonotdied@users.noreply.github.com>
Date: Fri, 6 Dec 2019 16:08:44 +0800
Subject: [PATCH] Fix:avoid calling setState() when mounted is false.

It is an error to call [setState] unless [mounted] is true.
---
 packages/sensors/example/lib/snake.dart | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/packages/sensors/example/lib/snake.dart b/packages/sensors/example/lib/snake.dart
index 2b7cad4cf2e0..2ce7809318f6 100644
--- a/packages/sensors/example/lib/snake.dart
+++ b/packages/sensors/example/lib/snake.dart
@@ -73,12 +73,14 @@ class SnakeState extends State<Snake> {
   void initState() {
     super.initState();
     accelerometerEvents.listen((AccelerometerEvent event) {
+      if (!mounted) return;
       setState(() {
         acceleration = event;
       });
     });
 
     Timer.periodic(const Duration(milliseconds: 200), (_) {
+      if (!mounted) return;
       setState(() {
         _step();
       });