How to hide or show Salesforce object through the apex code?

Hi,

I don't think so this is possible through apex code. But there is one workaround we can change the current user profile through apex code.

You can change the profile of the user to hide the meta data.

Hope this helps.

Here is the code,

You can create 2 record types that have different layouts.
One layout has that custom field another one not get.

You can using the Trigger are as follows,

trigger trg_Lead on Lead (before insert)
{
for (Lead objLead : Trigger.new)
{
if(objLead.LeadSource != null)
{

// Check the Lead status is Phone,web or Mail & update the Lead No Custom Field.
}
else
{
RecordType[] rt = [select Id,Name from RecordType where Name =: 'Test Lead'];   //Test Lead is a RECORD TYPE.
integer NsSize = rt.size();
for(integer i = 0; i < NsSize ; i++)
{
objLead.RecordTypeId = rt[i].Id;
}
}
}
}

Thanks.