backup.

lib/utils/util_io.dart

@@ -0,0 +1,46 @@
+
+import 'package:cached_network_image/cached_network_image.dart';
+import 'package:flutter/material.dart';
+import '../routes.dart';
+import 'utils.dart';
+import 'package:hive/hive.dart';
+import 'package:path_provider/path_provider.dart';
+
+class Util {
+  static Future<Box> getBox() async {
+    final dir = await getApplicationDocumentsDirectory();
+    Hive.init(dir.path);
+    Box box = await Hive.openBox('app_data');
+    return box;
+  }
+
+  static Widget showImage(String imageUrl, {double width, double height,
+    BoxFit fit, Widget Function(BuildContext, String, dynamic) errorWidget}) {
+    if (imageUrl == null || imageUrl.isEmpty) {
+      return Container(
+        width: width,
+        height: height,
+        child: Text(''),
+      );
+    }
+    return CachedNetworkImage(
+      imageUrl: imageUrl,
+      width: width,
+      height: width,
+      fit: fit,
+      placeholder: (context, url) => Utils.imageLoadingIndicator(),
+      errorWidget: errorWidget != null ? errorWidget : (context, url, error) {
+        return Image.asset(
+          'assets/images/not_found.png',
+          width: width,
+          height: height,
+          fit: fit,
+        );
+      },
+    );
+  }
+
+  static void openWebUrl(BuildContext context, String link) {
+    Routes.router.navigateTo(context, '/webview/$link');
+  }
+}