Print out User Avatar from User ID in Buddypress.
// echo bp_core_fetch_avatar ( array( 'item_id' => $member_id, 'type' => 'full' ) )
This code will display the user avatar by user ID and also make the avatar a clickable link to their profile.
// replace the number in the first line with the userID that you want. $member_id = bp_core_get_userid( '1' ) <a href="<?php echo bp_core_get_user_domain( $member_id ) ?>" title="<?php echo bp_core_get_user_displayname( $member ) ?>"> echo bp_core_fetch_avatar ( array( 'item_id' => $member_id, 'type' => 'full' ) ) ?></a>