added total costs in grouped objects

Author: GeorgeMC2610

app/src/main/java/com/georgemc2610/benzinapp/fragments/history/HistoryFragment.java

@@ -108,15 +108,22 @@ private void createCards()
             List<FuelFillRecord> recordsInMonthYear = groupedRecords.get(key);
             String stringYearMonth = key.format(formatter);
 
+            TextView totalCostLegend = null;
+            float totalCost = 0f;
+
             for (FuelFillRecord record : recordsInMonthYear)
             {
+                // add total cost count
+                totalCost += record.getCost_eur();
+
                 // inflate the card view for the fuel fill records.
                 View v;
 
                 if (recordsInMonthYear.indexOf(record) == 0)
                 {
                     v = inflater.inflate(R.layout.cardview_fill_with_legend, null);
                     TextView legend = v.findViewById(R.id.card_year_month_legend);
+                    totalCostLegend = v.findViewById(R.id.card_cost_legend);
                     legend.setText(stringYearMonth);
                 }
                 else
@@ -186,6 +193,13 @@ private void createCards()
                 // change the hint text.
                 hint.setText(getString(R.string.text_view_click_cards_message));
             }
+
+            if (totalCostLegend != null)
+            {
+                DecimalFormat decimalFormat = new DecimalFormat("#.##");
+                String totalCostString = "€" + decimalFormat.format(totalCost);
+                totalCostLegend.setText(totalCostString);
+            }
         }
     }
 

app/src/main/res/layout/cardview_fill_with_legend.xml

@@ -13,12 +13,23 @@
         android:layout_marginStart="7dp"
         android:layout_marginTop="8dp"
         android:layout_marginEnd="7dp"
-        android:layout_marginBottom="8dp"
+        android:layout_marginBottom="2dp"
         android:text="mmmm YYYY"
         style="@style/textColor"
         android:textSize="24sp"
         android:textStyle="bold"/>
 
+    <TextView
+        android:id="@+id/card_cost_legend"
+        android:layout_width="wrap_content"
+        android:layout_height="wrap_content"
+        android:layout_marginStart="7dp"
+        android:layout_marginEnd="7dp"
+        android:layout_marginBottom="8dp"
+        android:text="total cost"
+        style="@style/textColorSpecial"
+        android:textSize="12sp"/>
+
     <androidx.cardview.widget.CardView
         android:layout_width="match_parent"
         android:layout_height="105dp"