🐛 Use a transparent image as a placeholder

Author: ValentinVignal

packages/google_sign_in/google_sign_in/lib/widgets.dart

@@ -106,10 +106,59 @@ class GoogleUserCircleAvatar extends StatelessWidget {
             FadeInImage.memoryNetwork(
               // This creates a transparent placeholder image, so that
               // [placeholder] shows through.
-              placeholder: Uint8List((size.round() * size.round())),
+              placeholder: _kTransparentImage,
               image: sizedPhotoUrl,
             )
           ]),
         ));
   }
 }
+
+/// This is an transparent 1x1 gif image
+final _kTransparentImage = Uint8List.fromList(
+  [
+    71,
+    73,
+    70,
+    56,
+    57,
+    97,
+    1,
+    0,
+    1,
+    0,
+    128,
+    0,
+    0,
+    255,
+    255,
+    255,
+    0,
+    0,
+    0,
+    33,
+    249,
+    4,
+    1,
+    0,
+    0,
+    0,
+    0,
+    44,
+    0,
+    0,
+    0,
+    0,
+    1,
+    0,
+    1,
+    0,
+    0,
+    2,
+    2,
+    68,
+    1,
+    0,
+    59,
+  ],
+);