do not update empty carts

Author: ajungg

CHANGELOG.md

@@ -1,6 +1,11 @@
 # Changelog  
 All notable changes to this project will be documented in this file.
 
+## [0.16.5]
+
+### Fixed
+- Removed unnecessary cart update on empty carts
+
 ## [0.16.4]
 
 ### Changed

build.gradle

@@ -23,7 +23,7 @@ allprojects {
     }
 
     project.ext {
-        sdkVersion='0.16.4'
+        sdkVersion='0.16.5'
         versionCode=1
 
         compileSdkVersion=28

core/src/main/java/io/snabble/sdk/ShoppingCartUpdater.java

@@ -36,6 +36,10 @@ public void run() {
     public void update() {
         Logger.d("Updating prices...");
 
+        if (cart.size() == 0) {
+            return;
+        }
+
         final int modCount = cart.getModCount();
         handler.post(new Runnable() {
             @Override