Update material button and outline button.

Runtime/material/material_button.cs

 
             return new RawMaterialButton(
                 onPressed: this.onPressed,
+                onHighlightChanged: this.onHighlightChanged,
                 fillColor: this.color,
                 textStyle: theme.textTheme.button.copyWith(color: buttonTheme.getTextColor(this)),
                 highlightColor: this.highlightColor ?? theme.highlightColor,

Runtime/material/outline_button.cs

             );
         }
 
+        public override void didUpdateWidget(StatefulWidget _oldWidget) {
+            _OutlineButton oldWidget = _oldWidget as _OutlineButton;
+            base.didUpdateWidget(oldWidget);
+            if (this._pressed && !this.widget.enabled) {
+                this._pressed = false;
+                this._controller.reverse();
+            }
+        }
+
+        void _handleHighlightChanged(bool value) {
+            if (this._pressed == value) {
+                return;
+            }
+
+            this.setState(() => {
+                this._pressed = value;
+                if (value) {
+                    this._controller.forward();
+                }
+                else {
+                    this._controller.reverse();
+                }
+            });
+        }
+
         public override void dispose() {
             this._controller.dispose();
             base.dispose();
-            bool themeIsDark = this.widget.brightness == Brightness.dark;
-            Color color = this.widget.color ?? (themeIsDark
-                              ? new Color(0x00000000)
-                              : new Color(0x00FFFFFF));
+            if (this.widget.highlightElevation == null || this.widget.highlightElevation == 0.0) {
+                return Colors.transparent;
+            }
+
+            Color color = this.widget.color ?? Theme.of(this.context).canvasColor;
             ColorTween colorTween = new ColorTween(
                 begin: color.withAlpha(0x00),
                 end: color.withAlpha(0xFF)
 
         BorderSide _getOutline() {
-            bool isDark = this.widget.brightness == Brightness.dark;
-            Color color = this.widget.enabled
-                ? (this._pressed
-                    ? this.widget.highlightedBorderColor
-                    : (this.widget.borderSide?.color ??
-                       (isDark ? Colors.grey[600] : Colors.grey[200])))
-                : (this.widget.disabledBorderColor ??
-                   (isDark ? Colors.grey[800] : Colors.grey[100]));
+            Color specifiedColor = this.widget.enabled
+                ? (this._pressed ? this.widget.highlightedBorderColor : null) ?? this.widget.borderSide?.color
+                : this.widget.disabledBorderColor;
+
+            Color themeColor = Theme.of(this.context).colorScheme.onSurface.withOpacity(0.12f);
-                color: color,
-                width: this.widget.borderSide?.width ?? 2.0f
+                color: specifiedColor ?? themeColor,
+                width: this.widget.borderSide?.width ?? 1.0f
+            if (this.widget.highlightElevation == null || this.widget.highlightElevation == 0.0f) {
+                return 0.0f;
+            }
+
             return new FloatTween(
                 begin: 0.0f,
                 end: this.widget.highlightElevation ?? 2.0f
                         elevation: 0.0f,
                         disabledElevation: 0.0f,
                         highlightElevation: this._getHighlightElevation(),
-                        onHighlightChanged: (bool value) => {
-                            this.setState(() => {
-                                this._pressed = value;
-                                if (value) {
-                                    this._controller.forward();
-                                }
-                                else {
-                                    this._controller.reverse();
-                                }
-                            });
-                        },
+                        onHighlightChanged: this._handleHighlightChanged,
                         padding:
                         this.widget.padding,
                         shape: new _OutlineBorder(
         public bool Equals(_OutlineBorder other) {
             return this.side == other.side && this.shape == other.shape;
         }
-        
+
+
+
+
             return this.Equals((_OutlineBorder) obj);
         }