I am using this snippet to show certain buddypress actvity on a page but it is showing full activity content , can you help me with the code which will limit the content to 120 0r 140 character.

<?php
$params = array(

'user_id' => false,
'scope' => false,
'per_page' => 11,
'action' =>'activity_update',
'display_comments' => false,
'meta_query' => array(
array(
'key' => 'favorite_count',
'orderby' => 'meta_value',
'meta_key' => 'favorite_count',
'orderby'=> 'meta_value_num',
'order' => 'DESC',
)
),
);

if ( bp_has_activities( $params ) ) :?>

<?php while ( bp_activities() ) : bp_the_activity();?>

<a href="<?php bp_activity_user_link(); ?>">
<?php bp_activity_avatar(); ?>
<?php $member_id = bp_get_activity_user_id();
echo '<div class="nono">' . bp_core_get_user_displayname( $member_id ) . '</div>';?>
</a>

<span class="activity">
<?php printf( __( '%d Likes',  ), (int)bp_activity_get_meta( bp_get_activity_id(), 'favorite_count', true) ); ?><?php bp_activity_action(); ?>
</span>
</div>

<a class="story__summary" href="<?php bp_activity_thread_permalink(); ?>"><?php bp_activity_content_body(); ?></a>

<?php endwhile; ?>

<?php endif;?>