🐛 Add generic type to indicate provider when using pickAssetsWithDelegate method

Author: AlexV525

example/lib/customs/pickers/directory_file_asset_picker.dart

@@ -49,21 +49,13 @@ class _DirectoryFileAssetPickerState extends State<DirectoryFileAssetPicker>
     final FileAssetPickerProvider provider = FileAssetPickerProvider(
       selectedAssets: fileList,
     );
-    final Widget picker = ChangeNotifierProvider<FileAssetPickerProvider>.value(
-      value: provider,
-      child: AssetPicker<File, Directory>(
-        builder: FileAssetPickerBuilder(provider: provider),
-      ),
+    final FileAssetPickerBuilder builder = FileAssetPickerBuilder(
+      provider: provider,
     );
-    final List<File>? result = await Navigator.of(
+    final List<File>? result = await AssetPicker.pickAssetsWithDelegate(
       context,
-      rootNavigator: true,
-    ).push<List<File>>(
-      AssetPickerPageRoute<List<File>>(
-        builder: picker,
-        transitionCurve: Curves.easeIn,
-        transitionDuration: const Duration(milliseconds: 300),
-      ),
+      delegate: builder,
+      provider: provider,
     );
     if (result != null) {
       fileList

lib/src/widget/asset_picker.dart

@@ -130,18 +130,18 @@ class AssetPicker<A, P> extends StatefulWidget {
 
   /// Call the picker with provided [delegate] and [provider].
   /// 通过指定的 [delegate] 和 [provider] 调用选择器
-  static Future<List<A>?> pickAssetsWithDelegate<A, P>(
+  static Future<List<A>?>
+      pickAssetsWithDelegate<A, P, D extends AssetPickerProvider<A, P>>(
     BuildContext context, {
     required AssetPickerBuilderDelegate<A, P> delegate,
-    required AssetPickerProvider<A, P> provider,
+    required D provider,
     bool useRootNavigator = true,
     Curve routeCurve = Curves.easeIn,
     Duration routeDuration = const Duration(milliseconds: 300),
   }) async {
     await permissionCheck();
 
-    final Widget picker =
-        ChangeNotifierProvider<AssetPickerProvider<A, P>>.value(
+    final Widget picker = ChangeNotifierProvider<D>.value(
       value: provider,
       child: AssetPicker<A, P>(key: Constants.pickerKey, builder: delegate),
     );