Stop using deprecated methods

lib/editors/bottom_bar.dart

@@ -95,7 +95,7 @@ class EditorBottomBar extends StatelessWidget {
                 icon: const Icon(Icons.undo),
                 onPressed: undoAllowed ? onUndoSelected : null,
               ),
-            FlatButton.icon(
+            TextButton.icon(
               icon: const Icon(Icons.folder),
               label: Text(parentFolder.publicName),
               onPressed: () {

lib/iap/purchase_thankyou_screen.dart

@@ -15,14 +15,19 @@ class PurchaseThankYouScreen extends StatelessWidget {
           style: textTheme.headline4,
           textAlign: TextAlign.center,
         ),
-        RaisedButton(
+        Padding(
-          child: const Text("Back"),
-          color: theme.primaryColor,
-          onPressed: () {
-            Navigator.of(context).pop();
-          },
           padding: const EdgeInsets.fromLTRB(64.0, 16.0, 64.0, 16.0),
-        )
+          child: ElevatedButton(
+            child: const Text("Back"),
+            onPressed: () {
+              Navigator.of(context).pop();
+            },
+            style: ButtonStyle(
+              backgroundColor: MaterialStateProperty.all<Color>(
+                  Theme.of(context).primaryColor),
+            ),
+          ),
+        ),
       ],
       mainAxisAlignment: MainAxisAlignment.spaceAround,
     );

lib/iap/purchase_widget.dart

@@ -43,11 +43,16 @@ class PurchaseButton extends StatelessWidget {
       text = tr("widgets.PurchaseButton.fail");
     }
 
-    return RaisedButton(
+    return Padding(
-      child: Text(text, textAlign: TextAlign.center),
-      color: Theme.of(context).primaryColor,
       padding: const EdgeInsets.fromLTRB(32.0, 16.0, 32.0, 16.0),
-      onPressed: product != null ? () => _reportExceptions(context) : null,
+      child: ElevatedButton(
+        child: Text(text, textAlign: TextAlign.center),
+        onPressed: product != null ? () => _reportExceptions(context) : null,
+        style: ButtonStyle(
+          backgroundColor:
+              MaterialStateProperty.all<Color>(Theme.of(context).primaryColor),
+        ),
+      ),
     );
   }
 

lib/screens/onboarding_screens.dart

@@ -102,14 +102,17 @@ class OnBoardingScreenState extends State<OnBoardingScreen> {
       bottomBar = SizedBox(
         width: double.infinity,
         height: _bottomBarHeight,
-        child: RaisedButton(
+        child: ElevatedButton(
           key: const ValueKey("GetStarted"),
           child: Text(
             tr("OnBoarding.getStarted"),
             textAlign: TextAlign.center,
             style: Theme.of(context).textTheme.button,
           ),
-          color: Theme.of(context).primaryColor,
+          style: ButtonStyle(
+            backgroundColor: MaterialStateProperty.all<Color>(
+                Theme.of(context).primaryColor),
+          ),
           onPressed: _finish,
         ),
       );

lib/settings/settings_git_remote.dart

@@ -254,13 +254,16 @@ class Button extends StatelessWidget {
   Widget build(BuildContext context) {
     return SizedBox(
       width: double.infinity,
-      child: RaisedButton(
+      child: ElevatedButton(
         child: Text(
           text,
           textAlign: TextAlign.center,
           style: Theme.of(context).textTheme.button,
         ),
-        color: Theme.of(context).primaryColor,
+        style: ButtonStyle(
+          backgroundColor:
+              MaterialStateProperty.all<Color>(Theme.of(context).primaryColor),
+        ),
         onPressed: onPressed,
       ),
     );
@@ -277,13 +280,15 @@ class RedButton extends StatelessWidget {
   Widget build(BuildContext context) {
     return SizedBox(
       width: double.infinity,
-      child: RaisedButton(
+      child: ElevatedButton(
         child: Text(
           text,
           textAlign: TextAlign.center,
           style: Theme.of(context).textTheme.button,
         ),
-        color: Colors.red,
+        style: ButtonStyle(
+          backgroundColor: MaterialStateProperty.all<Color>(Colors.red),
+        ),
         onPressed: onPressed,
       ),
     );

lib/setup/button.dart

@@ -21,27 +21,33 @@ class GitHostSetupButton extends StatelessWidget {
     if (iconUrl == null) {
       return SizedBox(
         width: double.infinity,
-        child: RaisedButton(
+        child: ElevatedButton(
           child: Text(
             text,
             textAlign: TextAlign.center,
             style: Theme.of(context).textTheme.button,
           ),
-          color: Theme.of(context).primaryColor,
+          style: ButtonStyle(
+            backgroundColor: MaterialStateProperty.all<Color>(
+                Theme.of(context).primaryColor),
+          ),
           onPressed: _onPressedWithAnalytics,
         ),
       );
     } else {
       return SizedBox(
         width: double.infinity,
-        child: RaisedButton.icon(
+        child: ElevatedButton.icon(
           label: Text(
             text,
             textAlign: TextAlign.center,
             style: Theme.of(context).textTheme.button,
           ),
           icon: Image.asset(iconUrl!, width: 32, height: 32),
-          color: Theme.of(context).primaryColor,
+          style: ButtonStyle(
+            backgroundColor: MaterialStateProperty.all<Color>(
+                Theme.of(context).primaryColor),
+          ),
           onPressed: _onPressedWithAnalytics,
         ),
       );

lib/setup/screens.dart

@@ -73,7 +73,7 @@ class GitHostSetupScreenState extends State<GitHostSetupScreen> {
 
   UserInfo? _userInfo;
 
-  Widget? _buildPage(BuildContext context, int pos) {
+  Widget _buildPage(BuildContext context, int pos) {
     assert(_pageCount >= 1);
 
     if (pos == 0) {
@@ -350,16 +350,16 @@ class GitHostSetupScreenState extends State<GitHostSetupScreen> {
     }
 
     assert(_pageChoice[0] != PageChoice0.CustomProvider);
-
     assert(false, "Pos is $pos");
-    return null;
+
+    return Container();
   }
 
   @override
   Widget build(BuildContext context) {
     var pageView = PageView.builder(
       controller: pageController,
-      itemBuilder: _buildPage as Widget Function(BuildContext, int),
+      itemBuilder: _buildPage,
       itemCount: _pageCount,
       onPageChanged: (int pageNum) {
         setState(() {