Fix bug in camera example. (flutter#1958)

Akachu · Aug 8, 2019 · 38ff5a0 · 38ff5a0
1 parent b30188e
commit 38ff5a0
Showing 1 changed file with 4 additions and 0 deletions.
diff --git a/example/lib/main.dart b/example/lib/main.dart
@@ -52,6 +52,10 @@ class _CameraExampleHomeState extends State<CameraExampleHome>
 
   @override
   void didChangeAppLifecycleState(AppLifecycleState state) {
+    // App state changed before we got the chance to initialize.
+    if (controller == null || !controller.value.isInitialized) {
+      return;
+    }
     if (state == AppLifecycleState.inactive) {
       controller?.dispose();
     } else if (state == AppLifecycleState.resumed) {