Stuck with Salesforce Limited Feed Tracking.....Here you go with UNLIMITED Feed Tracking.......

Hi Awesome Salesforce Developers,

Recently I got a requirement where a client wants feed tracking for every change that Users are doing.Salesforce Limits Feed Tracking to 20 fields per object.
I have used FieldSet and After Update trigger on object (for which we want to do feed tracking) to overcome the 20 field limit.

What is feed tracking ? 
The below salesforce documentation link will explain in detail : 
https://help.salesforce.com/apex/HTViewHelpDoc?id=collab_feed_tracking_overview.htm&language=en

Example : Account Feed tracking 

IMP : Enable Feed Tracking by : 
setup -> Chatter -> FeedTracking -> Select Account -> Click on Enable Feed Tracking

Step 1) Create field set on Account called AccountChatter. Add the fields you want to track in feed tracking.

Step 2) Create the following after update trigger on Account : 

trigger AccountChatter on Account (after update) 
{
 List<Schema.FieldSetMember> lstTrackedFields = SObjectType.Account.FieldSets.AccountChatter.getFields();

 if (lstTrackedFields.isEmpty()) return; 
    
 List<FeedItem> lstFieldChanges = new List<FeedItem>();
    
 if(!trigger.isUpdate) return;
    
for (Account objNewAccount : trigger.new) 
{

 final Account oldAccount = trigger.oldmap.get(objNewAccount.Id);
    // Iterate over all fields in Fieldset 
 for (Schema.FieldSetMember objField : lstTrackedFields) 
 {
String fieldName  = objField.getFieldPath();
String fieldLabel = objField.getLabel();

if (objNewAccount.get(fieldName) == oldAccount.get(fieldName))
continue;

String oldValue = String.valueOf(oldAccount.get(fieldName));
String newValue = String.valueOf(objNewAccount.get(fieldName));

if (oldValue != null && oldValue.length()>255) 
oldValue = oldValue.substring(0,255);

if (newValue != null && newValue.length()>255) 
newValue = newValue.substring(0,255); 

FeedItem post = new FeedItem();
post.ParentId = objNewAccount.Id; // RecordId
post.Body = UserInfo.getName()+' changed '+fieldLabel+' from '+oldValue +' to '+newValue ;

lstFieldChanges.add(post);
  }
}

if (!lstFieldChanges.isEmpty()) insert lstFieldChanges;

}

Output : 
Add fields in FieldSet :

Create Record in Account with Name : Ajay test chatter 

Now update the record with Name : Ajay test verified

The above solution implemented by taking idea from below post :
(To overcome the limit of History Tracking)
http://salesforce.stackexchange.com/questions/39956/what-is-the-best-workaround-for-the-20-field-history-tracking-cap

Happy Coding !!!

Cheers !!