Handled relative path in image URLs:

lib/image_properties.dart

@@ -15,6 +15,7 @@ class ImageProperties {
   final bool matchTextDirection;
   final FilterQuality filterQuality;
   final double scale;
+  final String prefixNetworkImageRelativePath;
 
   const ImageProperties({
     this.scale = 1,
@@ -30,5 +31,6 @@ class ImageProperties {
     this.centerSlice,
     this.matchTextDirection = false,
     this.filterQuality = FilterQuality.low,
+    this.prefixNetworkImageRelativePath = ''
   });
 }

lib/rich_text_parser.dart

@@ -779,6 +779,14 @@ class HtmlRichTextParser extends StatelessWidget {
                     },
                   ));
                 } else {
+                  String imageUrl = '';
+                  if (!node.attributes['src'].contains('http')) {
+                    imageUrl = imageProperties.prefixNetworkImageRelativePath +
+                        node.attributes['src'];
+                  }
+                  else {
+                    imageUrl = node.attributes['src'];
+                  }
                   precacheImage(
                     NetworkImage(node.attributes['src']),
                     buildContext,