Feat simple resource flow

flutter/lib/l10n/app_en.arb

@@ -91,7 +91,7 @@
   "dialogCancel": "Cancel",
   "dialogTitleConfirm": "Confirm?",
   "dialogContentOfflineWarning": "Offline mode is enabled but following internet resources are defined in the configuration. Do you want to continue?",
-  "dialogContentMissingFiles": "The following files don't exist:",
+  "dialogContentMissingFiles": "MLPerf Mobile needs to download some ML model files used by the various benchmark tests. Some of these files can be fairly large, so we recommend connecting to Wi-Fi before downloading, if possible.\n\nOnce the files are downloaded, they will be cached and can be used to run the benchmark tests repeatedly. You can manage the downloaded model files by going to Resources in the app menu.",
   "dialogContentMissingFilesHint": "Please go to the menu Resources to download the missing files.",
   "dialogContentChecksumError": "The following files failed checksum validation:",
   "dialogContentChecksumErrorHint": "Please go to the menu Resources to clear the cache and download the files again.",

flutter/lib/ui/error_dialog.dart

@@ -124,7 +124,8 @@ Future<void> showResourceMissingDialog(
     BuildContext context, List<String> messages) async {
   final l10n = AppLocalizations.of(context)!;
 
-  Icon icon = const Icon(Icons.info_outline, color: Colors.grey, size: 32);
+  Icon icon =
+      const Icon(Icons.warning_amber_rounded, color: Colors.amber, size: 32);
   Color titleColor = Colors.grey;
 
   await showDialog(
@@ -164,37 +165,7 @@ Future<void> showResourceMissingDialog(
             mainAxisSize: MainAxisSize.min,
             crossAxisAlignment: CrossAxisAlignment.start,
             children: [
-              Container(
-                padding: const EdgeInsets.all(4),
-                decoration: BoxDecoration(
-                  color: Colors.amber.withOpacity(0.2),
-                  borderRadius: BorderRadius.circular(8),
-                  border: Border.all(color: Colors.amber, width: 1),
-                ),
-                child: Row(
-                  children: [
-                    const Icon(Icons.info_outline, color: Colors.amber),
-                    const SizedBox(width: 10),
-                    Flexible(
-                      child: Text(
-                        l10n.dialogContentMissingFilesHint,
-                        style: const TextStyle(
-                          fontSize: 14,
-                          color: Colors.black87,
-                        ),
-                      ),
-                    ),
-                  ],
-                ),
-              ),
-              const SizedBox(height: 10),
-              ...messages.map((e) => Padding(
-                    padding: const EdgeInsets.only(bottom: 8.0),
-                    child: Text(
-                      e,
-                      style: const TextStyle(fontSize: 15),
-                    ),
-                  )),
+              Text(l10n.dialogContentMissingFiles),
             ],
           ),
         ),
@@ -219,7 +190,9 @@ Future<void> showResourceMissingDialog(
                     Navigator.of(context).pop();
                     Navigator.of(context).push(
                       MaterialPageRoute(
-                        builder: (context) => const ResourcesScreen(),
+                        builder: (context) => const ResourcesScreen(
+                          autoStart: true,
+                        ),
                       ),
                     );
                   },

flutter/lib/ui/settings/resources_screen.dart

@@ -14,7 +14,9 @@ import 'package:mlperfbench/ui/error_dialog.dart';
 import 'package:mlperfbench/ui/nil.dart';
 
 class ResourcesScreen extends StatefulWidget {
-  const ResourcesScreen({super.key});
+  final bool autoStart;
+
+  const ResourcesScreen({this.autoStart = false, super.key});
 
   @override
   State<ResourcesScreen> createState() => _ResourcesScreen();
@@ -28,24 +30,44 @@ class _ResourcesScreen extends State<ResourcesScreen> {
   bool get downloading =>
       (state.loadingProgress > 0.0 && state.loadingProgress < 0.999);
 
+  @override
+  void initState() {
+    if (widget.autoStart) {
+      WidgetsBinding.instance.addPostFrameCallback((_) async {
+        await state.loadResources(
+          downloadMissing: true,
+          benchmarks: state.activeBenchmarks,
+        );
+        if (state.error != null) {
+          if (!mounted) return;
+          await showErrorDialog(context, <String>[state.error.toString()]);
+          // Reset both the error and stacktrace for further operation
+          state.error = null;
+          state.stackTrace = null;
+        }
+      });
+
+      super.initState();
+    }
+  }
+
   @override
   Widget build(BuildContext context) {
     store = context.watch<Store>();
     state = context.watch<BenchmarkState>();
     l10n = AppLocalizations.of(context)!;
 
-    final children = <Widget>[];
-
-    for (var benchmark in state.allBenchmarks) {
-      children.addAll([_listTileBuilder(benchmark), const Divider(height: 20)]);
-    }
-    children.addAll([
+    final children = <Widget>[
+      _downloadButton(state.allBenchmarks, l10n.resourceDownloadAll),
       const SizedBox(height: 20),
+      for (var benchmark in state.allBenchmarks) ...[
+        _listTileBuilder(benchmark),
+        const Divider(height: 20),
+      ],
       _downloadProgress(),
-      _downloadButton(state.allBenchmarks, l10n.resourceDownloadAll),
       const SizedBox(height: 20),
       _clearCacheButton(),
-    ]);
+    ];
 
     return Scaffold(
       appBar: AppBar(title: Text(l10n.menuResources)),