Now a days, Blogging is more popular in every where and wants to look their blog different than others. By creating your own design or downloading Templates from other source had very known in these days . Creating a template is easy but every one on the internet is searching on how to hide the widget's while viewing blog posts .
Today i am going to discuss about this Technique. For beginners it is difficult to edit their Blogger template but it's easiest if you have a little bit of experience with editing your Blogger template. Before you begin, back up your template . Do not skip the backup. Find Your Gadget in the Template Open your template by clicking the "Edit HTML" button beneath your "Live on Blog" screenshot.
Now, use the "Jump to Widget" dropdown button to jump down to your gadget.
In this example image, I'm choosing the widget with the ID "Image1". 
You can stop unfolding when you get to the closing </b:widget> tag of your widget and see that there are no more fold arrows above it. Now that your code is unfolded, let me show you where to add the conditional tags. Inserting Conditional Tag No matter what conditional tag you choose, it goes in the same part of your gadget's code, so I'm going to show you placement first. The opening conditional tag goes immediately below this line:
<b:includable id='main'>
The closing conditional tag, </b:if>, goes immediately above this line:
</b:includable> Both lines are highlighted in this image.
Now that you know where to put your conditional, it's time to choose your tag!Show Gadget on the Homepage Only If you want to restrict a gadget to your homepage only, use this conditional.Insert the following line below
Now that you know where to put your conditional, it's time to choose your tag!Show Gadget on the Homepage Only If you want to restrict a gadget to your homepage only, use this conditional.Insert the following line below
<b:includable id='main'>
<b:if cond='data:blog.url==data:blog.homepageUrl'>
Then, close the conditional by inserting </b:if> above this line </b:includable> Press the "Preview template" button. If you see an error message, double check your code and try again. Otherwise, press the "Save template" button to save your changes.Show Gadget on the Homepage and "Index" Pages.The "Index" pages of your blog are the pages readers see when they click the "Older Posts" and "Newer Posts" links at the bottom of the page.
Insert the following line below
<b:includable id='main'>
<b:if cond='data:blog.pageType == "index"'>
Then, close the conditional by inserting </b:if> above this line </b:includable> Press the "Preview template" button. If you see an error message, double check your code and try again. Otherwise, press the "Save template" button to save your changes.
Show Gadget on Post Pages Only.This will show the gadget only when your reader is on an individual post page (aka the permalink page). The gadget will be hidden from the home page, index pages, and static pages.Insert the following line below
<b:includable id='main'>
<b:if cond='data:blog.pageType == "item">
Then, close the conditional by inserting </b:if> above this line
</b:includable>
Press the "Preview template" button. If you see an error message, double check your code and try again. Otherwise, press the "Save template" button to save your changes.
Show Gadget on Static Pages Only Static pages are the pages you make in the "Pages" section of Blogger — by default they show up in your top navigation, unless you've specified otherwise.Insert the following line below
<b:includable id='main'>
<b:if cond='data:blog.pageType == "static_page"'>
Then, close the conditional by inserting </b:if> above this line </b:includable> Press the "Preview template" button. If you see an error message, double check your code and try again. Otherwise, press the "Save template" button to save your changes.
Feel free to Ask any Questions..