added link to scanner in shopping cart

Author: ajungg

build.gradle

@@ -24,7 +24,7 @@ allprojects {
     }
 
     project.ext {
-        sdkVersion='0.8.12'
+        sdkVersion='0.8.13'
         versionCode=1
 
         compileSdkVersion=28

ui/src/main/java/io/snabble/sdk/ui/cart/ShoppingCartView.java

@@ -151,6 +151,17 @@ public void click() {
             }
         });
 
+        View scanProducts = findViewById(R.id.scan_products);
+        scanProducts.setOnClickListener(new OnClickListener() {
+            @Override
+            public void onClick(View view) {
+                SnabbleUICallback callback = SnabbleUI.getUiCallback();
+                if (callback != null) {
+                    callback.showScannerWithCode(null);
+                }
+            }
+        });
+
         createItemTouchHelper();
 
         SnabbleSdk sdkInstance = SnabbleUI.getSdkInstance();

ui/src/main/res/layout/view_shopping_cart.xml

@@ -54,6 +54,18 @@
             android:layout_width="304dp"
             android:layout_height="wrap_content"
             android:gravity="center"
+            android:layout_marginBottom="8dp"
             android:text="@string/Snabble.Shoppingcart.emptyState.description" />
+
+        <TextView
+            android:id="@+id/scan_products"
+            android:layout_width="wrap_content"
+            android:layout_height="wrap_content"
+            android:gravity="center"
+            android:textColor="@color/snabble_textColorAction"
+            android:textSize="15sp"
+            android:padding="16dp"
+            android:background="?attr/selectableItemBackground"
+            android:text="@string/Snabble.Shoppingcart.emptyState.buttonTitle" />
     </LinearLayout>
 </FrameLayout>