try two

lib/animprovider.dart

@@ -0,0 +1,59 @@
+import 'package:flutter/material.dart';
+
+class AnimProv extends ChangeNotifier {
+  double _width = 150;
+  double get width => _width;
+  set width(double value) {
+    _width = value;
+    notifyListeners();
+  }
+
+  double _height = 100;
+  double get height => _height;
+  set height(double value) {
+    _height = value;
+    notifyListeners();
+  }
+
+  double _alignX = 0;
+  double get alignY => _alignY;
+  set alignX(double value) {
+    _alignX = value;
+    notifyListeners();
+  }
+
+  double _alignY = 0;
+  double get alignX => _alignX;
+  set alignY(double value) {
+    _alignY = value;
+    notifyListeners();
+  }
+
+  String _picAsset = "";
+  String get picAsset => _picAsset;
+  set picAsset(String value) {
+    _picAsset = value;
+    notifyListeners();
+  }
+
+  String _foneScreen;
+  String get foneScreen => _foneScreen;
+  set foneScreen(String value) {
+    _foneScreen = value;
+    notifyListeners();
+  }
+
+  String _message = "";
+  String get message => _message;
+  set message(String value) {
+    _message = value;
+    notifyListeners();
+  }
+
+  double _textAlignment = 0;
+  double get textAlignment => _textAlignment;
+  set textAlignment(double value) {
+    _textAlignment = value;
+    notifyListeners();
+  }
+}