Show days since current date in overview

I find it more logical to see how long ago a measurement was done,
instead of how long ago since the last measurement was a measurement
done.

Fix a bug where the days since a measurement was calculated
incorrectly if the measurement was done in the previous year.

Convert the days label to plurals so that "day" is used when the
measurement was done yesterday.

android_app/app/src/main/java/com/health/openscale/gui/fragments/OverviewFragment.java

@@ -54,7 +54,7 @@ import com.health.openscale.gui.views.WeightMeasurementView;
 
 import java.text.DateFormat;
 import java.util.ArrayList;
-import java.util.Calendar;
+import java.util.Date;
 import java.util.List;
 
 import lecho.lib.hellocharts.formatter.SimpleLineChartValueFormatter;
@@ -255,12 +255,7 @@ public class OverviewFragment extends Fragment implements FragmentUpdateListener
             max_i = scaleDataList.size();
         }
 
-        Calendar histDate = Calendar.getInstance();
-        Calendar lastDate = Calendar.getInstance();
-
-        if (!scaleDataList.isEmpty()) {
-            lastDate.setTime(scaleDataList.get(0).getDateTime());
-        }
+        Date now = new Date();
 
         scaleDataLastDays = new ArrayList<ScaleData>();
 
@@ -285,11 +280,9 @@ public class OverviewFragment extends Fragment implements FragmentUpdateListener
             if (histData.getBone() != 0.0f)
                 valuesBone.add(new PointValue(i, histData.getBone()));
 
-            histDate.setTime(histData.getDateTime());
-
-            long days = 0 - daysBetween(lastDate, histDate);
-
-            axisValues.add(new AxisValue(i, String.format("%d " + getResources().getString(R.string.label_days), days).toCharArray()));
+            int days = daysBetween(now, histData.getDateTime());
+            String label = getResources().getQuantityString(R.plurals.label_days, Math.abs(days), days);
+            axisValues.add(new AxisValue(i, label.toCharArray()));
         }
 
         Line lineWeight = new Line(valuesWeight).
@@ -428,8 +421,9 @@ public class OverviewFragment extends Fragment implements FragmentUpdateListener
         pieChartLast.setPieChartData(pieChartData);
     }
 
-    private long daysBetween(Calendar startDate, Calendar endDate) {
-        return startDate.get(Calendar.DAY_OF_YEAR) - endDate.get(Calendar.DAY_OF_YEAR);
+    private int daysBetween(Date startDate, Date endDate) {
+        final float msPerDay = 24 * 60 * 60 * 1000;
+        return Math.round((endDate.getTime() - startDate.getTime()) / msPerDay);
     }
 
     public void btnOnClickInsertData()

android_app/app/src/main/java/com/health/openscale/gui/fragments/StatisticsFragment.java

@@ -34,7 +34,7 @@ import com.health.openscale.core.datatypes.ScaleUser;
 import java.text.DateFormat;
 import java.util.ArrayList;
 import java.util.Calendar;
-import java.util.concurrent.TimeUnit;
+import java.util.Date;
 
 public class StatisticsFragment extends Fragment implements FragmentUpdateListener {
 
@@ -99,7 +99,7 @@ public class StatisticsFragment extends Fragment implements FragmentUpdateListen
         txtTitleStatistics.setText(getResources().getString(R.string.label_title_statistics).toUpperCase());
 
         prefs = PreferenceManager.getDefaultSharedPreferences(statisticsView.getContext());
-        currentScaleUser =  OpenScale.getInstance(getContext()).getSelectedScaleUser();
+        currentScaleUser = OpenScale.getInstance(getContext()).getSelectedScaleUser();
 
         updateStatistics(scaleDataList);
         updateGoal(scaleDataList);
@@ -114,12 +114,8 @@ public class StatisticsFragment extends Fragment implements FragmentUpdateListen
         double weight_diff = goalScaleData.getConvertedWeight(currentScaleUser.scale_unit) - lastScaleData.getConvertedWeight(currentScaleUser.scale_unit);
         txtGoalDiff.setText(String.format("%.1f " + ScaleUser.UNIT_STRING[currentScaleUser.scale_unit], weight_diff));
 
-        Calendar goalDate = Calendar.getInstance();
-        Calendar curDate = Calendar.getInstance();
-        goalDate.setTime(currentScaleUser.goal_date);
-
-        long days = daysBetween(curDate, goalDate);
-        txtGoalDayLeft.setText(days + " " + getResources().getString(R.string.label_days));
+        int days = Math.max(0, daysBetween(new Date(), currentScaleUser.goal_date));
+        txtGoalDayLeft.setText(getResources().getQuantityString(R.plurals.label_days, days, days));
 
         lastScaleData.setUserId(currentScaleUser.id);
 
@@ -335,9 +331,8 @@ public class StatisticsFragment extends Fragment implements FragmentUpdateListen
         txtAvgMonth.setText(monthSize + " " + getResources().getString(R.string.label_measures));
     }
 
-    private long daysBetween(Calendar startDate, Calendar endDate) {
-        long end = endDate.getTimeInMillis();
-        long start = startDate.getTimeInMillis();
-        return TimeUnit.MILLISECONDS.toDays(Math.abs(end - start));
+    private int daysBetween(Date startDate, Date endDate) {
+        final float msPerDay = 24 * 60 * 60 * 1000;
+        return (int)Math.ceil((endDate.getTime() - startDate.getTime()) / msPerDay);
     }
 }

android_app/app/src/main/res/values-de/strings.xml

@@ -36,7 +36,10 @@
     <string name="label_body_height">Körpergröße</string>
     <string name="label_comment">Kommentar</string>
     <string name="label_date">Datum</string>
-    <string name="label_days">Tage</string>
+    <plurals name="label_days">
+        <item quantity="one">%d Tag</item>
+        <item quantity="other">%d Tage</item>
+    </plurals>
     <string name="label_days_left">Tage übrig</string>
     <string name="label_delete">Löschen</string>
     <string name="label_delete_all">Alles löschen</string>

android_app/app/src/main/res/values-es/strings.xml

@@ -38,7 +38,10 @@
     <string name="label_bone">Masa ósea</string>
     <string name="label_smartUserAssign">Asignación inteligente de usuario</string>
 
-    <string name="label_days">días</string>
+    <plurals name="label_days">
+        <item quantity="one">%d día</item>
+        <item quantity="other">%d días</item>
+    </plurals>
     <string name="label_measures">medidas</string>
     <string name="label_last_week">Últimos 7 días</string>
     <string name="label_last_month">Últimos 30 días</string>

android_app/app/src/main/res/values-fr/strings.xml

@@ -33,7 +33,10 @@
     <string name="label_whr">Rapport taille-hanches</string>
     <string name="label_smartUserAssign">Affectation intelligente de l\'Utilisateur</string>
 
-    <string name="label_days">jours</string>
+    <plurals name="label_days">
+        <item quantity="one">%d jour</item>
+        <item quantity="other">%d jours</item>
+    </plurals>
     <string name="label_measures">mesures</string>
     <string name="label_last_week">7 derniers jours</string>
     <string name="label_last_month">30 derniers jours</string>

android_app/app/src/main/res/values-ja/strings.xml

@@ -23,7 +23,9 @@
     <string name="label_body_height">身長</string>
     <string name="label_cancel">キャンセル</string>
     <string name="label_comment">コメント</string>
-    <string name="label_days">日</string>
+    <plurals name="label_days">
+        <item quantity="other">%d 日</item>
+    </plurals>
     <string name="label_date">期日</string>
     <string name="label_delete">デリート</string>
     <string name="label_export">レコードのエクスポート</string>

android_app/app/src/main/res/values-pl/strings.xml

@@ -36,7 +36,9 @@
     <string name="label_bone">Masa kostna</string>
     <string name="label_smartUserAssign">Inteligente przypisywanie użytkowników</string>
 
-    <string name="label_days">dni</string>
+    <plurals name="label_days">
+        <item quantity="other">%d dni</item>
+    </plurals>
     <string name="label_measures">pomiarów</string>
     <string name="label_last_week">Ostatnie 7 dni</string>
     <string name="label_last_month">Ostatnie 30 dni</string>

android_app/app/src/main/res/values-pt/strings.xml

@@ -69,7 +69,9 @@
     <string name="label_cancel">Cancelar</string>
     <string name="label_comment">Comentário</string>
     <string name="label_date">Data</string>
-    <string name="label_days">dias</string>
+    <plurals name="label_days">
+        <item quantity="other">%d dias</item>
+    </plurals>
     <string name="label_days_left">Dias restantes</string>
     <string name="label_delete">Deletar</string>
     <string name="label_delete_all">Deletar tudo</string>

android_app/app/src/main/res/values-sk/strings.xml

@@ -31,7 +31,9 @@
   <string name="label_whr">Pomer pásu a bokov</string>
   <string name="label_bone">Hmotnosť kostí</string>
   <string name="label_smartUserAssign">Chytré priradenie používateľa</string>
-  <string name="label_days">dni</string>
+  <plurals name="label_days">
+        <item quantity="other">%d dni</item>
+    </plurals>
   <string name="label_measures">merania</string>
   <string name="label_last_week">Posledných 7 dní</string>
   <string name="label_last_month">Posledných 30 dní</string>

android_app/app/src/main/res/values-sv/strings.xml

@@ -60,7 +60,10 @@
     <string name="label_days_left">Dagar kvar</string>
     <string name="label_goal_date_is">Måldatum är</string>
     <string name="label_weight_difference">Viktskillnad</string>
-    <string name="label_days">dagar</string>
+    <plurals name="label_days">
+        <item quantity="one">%d dag</item>
+        <item quantity="other">%d dagar</item>
+    </plurals>
     <string name="label_measures">mätningar</string>
     <string name="label_last_week">Senast 7 dagarna</string>
     <string name="label_last_month">Senast 30 dagarna</string>

android_app/app/src/main/res/values-tr/strings.xml

@@ -37,7 +37,9 @@
     <string name="label_bone">Kemik kütlesi</string>
     <string name="label_smartUserAssign">Akýllý kullanýcý atamasý</string>
 
-    <string name="label_days">Günler</string>
+    <plurals name="label_days">
+        <item quantity="other">%d Günler</item>
+    </plurals>
     <string name="label_measures">Ölçüler</string>
     <string name="label_last_week">Son 7 Gün</string>
     <string name="label_last_month">Son 30 Gün</string>

android_app/app/src/main/res/values/strings.xml

@@ -38,7 +38,10 @@
     <string name="label_bone">Bone mass</string>
     <string name="label_smartUserAssign">Smart User assignment</string>
 
-    <string name="label_days">days</string>
+    <plurals name="label_days">
+        <item quantity="one">%d day</item>
+        <item quantity="other">%d days</item>
+    </plurals>
     <string name="label_measures">measures</string>
     <string name="label_last_week">Last 7 days</string>
     <string name="label_last_month">Last 30 days</string>