Merge pull request #2 from abineshPalanisamy/master

KB file added

Author: FarjanaParveen

lib/helper/save_file_mobile_desktop.dart

@@ -14,9 +14,17 @@ Future<void> saveAndLaunchFile(List<int> bytes, String fileName) async {
       Platform.isIOS ||
       Platform.isLinux ||
       Platform.isWindows) {
-    final Directory directory =
-        await path_provider.getApplicationSupportDirectory();
-    path = directory.path;
+    if (Platform.isAndroid) {
+      final Directory? directory =
+          await path_provider.getExternalStorageDirectory();
+      if (directory != null) {
+        path = directory.path;
+      }
+    } else {
+      final Directory directory =
+          await path_provider.getApplicationSupportDirectory();
+      path = directory.path;
+    }
   } else {
     path = await path_provider_interface.PathProviderPlatform.instance
         .getApplicationSupportPath();

lib/helper/save_file_web.dart

@@ -0,0 +1,12 @@
+import 'dart:async';
+import 'dart:convert';
+import 'dart:html';
+
+///To save the excel sheet in the web platform.
+Future<void> saveAndLaunchFile(List<int> bytes, String fileName) async {
+  AnchorElement(
+      href:
+          'data:application/octet-stream;charset=utf-16le;base64,${base64.encode(bytes)}')
+    ..setAttribute('download', fileName)
+    ..click();
+}