Update read me in example

example/README.md

@@ -1,30 +1,49 @@
 ## Usage
 
 ```
-Future<void> getLinks() async { 
-     await LinkPreview.getPreview('https://flutter.dev',
-          onData: (PreviewResponse data) => _previewData(data),
-          onError: (error) => _handleError(error));
+Future<void> getLinks() async {
+      try {
+            PreviewResponse previewResponse = await LinkPreview.getPreview('https://google.com');
+            _previewData(previewResponse);
+      
+            PreviewResponse previewResponse2 = await LinkPreview.getPreview('https://facebook.com');
+            _previewData(previewResponse2);
+      
+            PreviewResponse previewResponse3 = await LinkPreview.getPreview('https://amazon.com');
+            _previewData(previewResponse3);
+          } on PlatformException {
+            print('Error occured!!');
+          }
   }
 
   _previewData(PreviewResponse previewResponse) {
-    // Preview status can be `complete` (handle data) or `loading` (show loading indicator)
-    if (previewResponse.status == PreviewStatus.complete) {
-      print('Received status: ${previewResponse.status}');
-      print('Received title: ${previewResponse.title}');
-      print('Received description: ${previewResponse.description}');
-      print('Received image: ${previewResponse.image}');
-      print('Received url: ${previewResponse.url}');
-      print('Received final url: ${previewResponse.finalUrl}');
-      print('Received cannonical url: ${previewResponse.cannonicalUrl}');
-      print('Received html code: ${previewResponse.htmlCode}');
-      print('Received row: ${previewResponse.row}');      
-    } else {
-      print('Received status: ${previewResponse.status}');
-    }
-  }
-  
-  _handleError(error) {
-    print('Received error: ${error.message}');
+    if (previewResponse.status == PreviewStatus.success) {
+          print('===============================================');
+          print('Received status: ${previewResponse.status}');
+          print('Received title: ${previewResponse.title}');
+          print('Received description: ${previewResponse.description}');
+          print('Received image: ${previewResponse.image}');
+          print('Received url: ${previewResponse.url}');
+          print('Received final url: ${previewResponse.finalUrl}');
+          print('Received cannonical url: ${previewResponse.cannonicalUrl}');
+          print('Received html code: ${previewResponse.htmlCode}');
+          print('Received row: ${previewResponse.row}');
+          print('===============================================');
+        } else if (previewResponse.status == PreviewStatus.wrongUrlError) {
+          print('===============================================');
+          print('Received status: ${previewResponse.status}');
+          print('Wrong URL');
+          print('===============================================');
+        } else if (previewResponse.status == PreviewStatus.parsingError) {
+          print('===============================================');
+          print('Received status: ${previewResponse.status}');
+          print('Parsing URL error');
+          print('===============================================');
+        } else {
+          print('===============================================');
+          print('Received status: ${previewResponse.status}');
+          print('Other error');
+          print('===============================================');
+        }
   }
 ```