1、添加.gitignore；2、优化导包；

.gitignore

+# Miscellaneous
+*.class
+*.log
+*.pyc
+*.swp
+.DS_Store
+.atom/
+.buildlog/
+.history
+.svn/
+
+# IntelliJ related
+*.iml
+*.ipr
+*.iws
+.idea/
+
+# The .vscode folder contains launch configuration and tasks you configure in
+# VS Code which you may wish to be included in version control, so this line
+# is commented out by default.
+#.vscode/
+
+# Flutter/Dart/Pub related
+# Libraries should not include pubspec.lock, per https://dart.dev/guides/libraries/private-files#pubspeclock.
+/pubspec.lock
+**/doc/api/
+.dart_tool/
+.packages
+build/
+
+example/pubspec.lock
+
+.flutter-plugins-dependencies
+
+.flutter-plugins

example/android/.gitignore

+gradle-wrapper.jar
+/.gradle
+/captures/
+/gradlew
+/gradlew.bat
+/local.properties
+GeneratedPluginRegistrant.java
+
+# Remember to never publicly share your keystore.
+# See https://flutter.dev/docs/deployment/android#reference-the-keystore-from-the-app
+key.properties
+**/*.keystore
+**/*.jks

lib/datagrid.dart

@@ -13,6 +13,8 @@
 /// * [Knowledge base](https://www.syncfusion.com/kb/flutter/sfdatagrid)
 library datagrid;
 
+export 'package:syncfusion_flutter_core/theme.dart';
+
 export './src/datagrid_widget/sfdatagrid.dart'
     hide
         updateSelectedIndex,