chore: Enable strong language analyzer

packages/home_widget/analysis_options.yaml

@@ -1,5 +1,11 @@
 include: package:flutter_lints/flutter.yaml
 
+analyzer:
+  language:
+    strict-raw-types: true
+    strict-inference: true
+    strict-casts: true
+
 linter:
   rules:
     - public_member_api_docs

packages/home_widget/lib/src/home_widget.dart

@@ -150,7 +150,10 @@ class HomeWidget {
   /// This method renders the widget to an image (png) file with the provided filename.
   /// The png file is saved to the App Group container and the full path is returned as a string.
   /// The filename is saved to UserDefaults using the provided key.
-  static Future renderFlutterWidget(
+  ///
+  /// This method can throw in case the widget could not be converted to an
+  /// image or if the image could not be saved to a file.
+  static Future<String> renderFlutterWidget(
     Widget widget, {
     required String key,
     Size logicalSize = const Size(200, 200),
@@ -271,13 +274,11 @@ class HomeWidget {
   /// currently pinned on the home screen.
   /// Returns an empty list if no widgets are pinned.
   static Future<List<HomeWidgetInfo>> getInstalledWidgets() async {
-    final List<dynamic>? result =
-        await _channel.invokeMethod('getInstalledWidgets');
+    final result =
+        await _channel.invokeMethod('getInstalledWidgets') as List<dynamic>?;
     return result
-            ?.map(
-              (widget) =>
-                  HomeWidgetInfo.fromMap(widget.cast<String, dynamic>()),
-            )
+            ?.map((widget) => (widget as Map).cast<String, dynamic>())
+            .map(HomeWidgetInfo.fromMap)
             .toList() ??
         [];
   }

packages/home_widget/lib/src/home_widget_callback_dispatcher.dart

@@ -14,7 +14,7 @@ Future<void> callbackDispatcher() async {
     final args = call.arguments;
 
     final callback = PluginUtilities.getCallbackFromHandle(
-      CallbackHandle.fromRawHandle(args[0]),
+      CallbackHandle.fromRawHandle(args[0] as int),
     ) as FutureOr<void> Function(Uri?);
 
     final rawUri = args[1] as String?;

packages/home_widget/test/home_widget_test.dart

@@ -61,7 +61,7 @@ void main() {
 
   test('getWidgetData', () async {
     const dataId = 'TestId';
-    expect(await HomeWidget.getWidgetData(dataId), 'TestData');
+    expect(await HomeWidget.getWidgetData<String>(dataId), 'TestData');
     final arguments = await passedArguments.future;
 
     expect(arguments['id'], dataId);
@@ -264,8 +264,11 @@ void main() {
       when(() => file.create(recursive: true))
           .thenAnswer((invocation) async => file);
       when(() => file.writeAsBytes(any())).thenAnswer((invocation) async {
-        byteCompleter
-            .complete(Uint8List.fromList(invocation.positionalArguments.first));
+        byteCompleter.complete(
+          Uint8List.fromList(
+            invocation.positionalArguments.first as List<int>,
+          ),
+        );
         return file;
       });