How to display popular posts by views of each category?

Hello guys,

Can someone help me with this code?
I want to display most popular posts by views of each category...
I already have a code working but only shows the popular posts of all, not for each category...

Here is my code in single.php file:

<?php
foreach(get_the_category(get_the_ID()) as $keys){
    $cu = $keys->cat_name;
}
?>
<h2 class="single-post-external" style="background: #9F0C67; padding: 8px 0 8px 8px;">Most Viewed Posts in <?php echo $cu; ?> Category<?php //echo  "Like ".get_the_title(); ?></h2>  
    <?php setPostViews(get_the_ID()); ?>
    <?php query_posts('posts_per_page=8&meta_key=post_views_count&orderby=meta_value_num&order=DESC'); ?>
    <div id="main_container" class="mrCatouter container  clearfix">
    <?php while ( have_posts() ) : the_post(); ?>

PHP:

And in my functions.php file I have this:

function setPostViews($postID) {  
    $count_key = 'post_views_count';  
    $count = get_post_meta($postID, $count_key, true);  
    if($count==''){      
        $count = 0;      
        delete_post_meta($postID, $count_key);      
        add_post_meta($postID, $count_key, '0');  
    }else{      
        $count++;      
        update_post_meta($postID, $count_key, $count);  
    }
}

PHP:

I think that I need to change:

query_posts('posts_per_page=8&meta_key=post_views_count&orderby=meta_value_num&order=DESC');

Code (markup):

but I don't have sure what to do...

Hope to see some help here

Thank you guys!

Kind regards,
Divvy

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EDIT
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I found out that adding a &cat= after DESC and enter the id number for the category it works
But I dont want to show a specific category, I want to show the category where the post is in...
Any ideas?

 

Resolved