Show VO2 max to one decimal place

app/src/main/java/nodomain/freeyourgadget/gadgetbridge/activities/charts/VO2MaxFragment.java

@@ -193,7 +193,7 @@ public class VO2MaxFragment extends AbstractChartFragment<VO2MaxFragment.VO2MaxD
             // Running
             VO2MaxRecord latestRunningRecord = vo2MaxData.getLatestValue(Vo2MaxSample.Type.RUNNING);
             float runningVO2MaxValue = VO2MaxRanges.INSTANCE.calculateVO2MaxPercentile(latestRunningRecord != null ? latestRunningRecord.value : 0, age, activityUser.getGender());
-            vo2MaxRunningValue.setText(String.valueOf(latestRunningRecord != null ? Math.round(latestRunningRecord.value) : "-"));
+            vo2MaxRunningValue.setText(latestRunningRecord != null ? formatVO2MaxValue(latestRunningRecord.value) : "-");
             gaugeDrawer.drawSegmentedGauge(vo2MaxRunningGauge, colors, segments, runningVO2MaxValue, false, true);
             lineDataSets.add(createDataSet(runningEntries, getResources().getColor(R.color.vo2max_running_char_line_color), getString(R.string.vo2max_running)));
 
@@ -201,13 +201,13 @@ public class VO2MaxFragment extends AbstractChartFragment<VO2MaxFragment.VO2MaxD
             VO2MaxRecord latestCyclingRecord = vo2MaxData.getLatestValue(Vo2MaxSample.Type.CYCLING);
             float cyclingVO2MaxValue = VO2MaxRanges.INSTANCE.calculateVO2MaxPercentile(latestCyclingRecord != null ? latestCyclingRecord.value : 0, age, activityUser.getGender());
             gaugeDrawer.drawSegmentedGauge(vo2MaxCyclingGauge, colors, segments, cyclingVO2MaxValue, false, true);
-            vo2MaxCyclingValue.setText(String.valueOf(latestCyclingRecord != null ? Math.round(latestCyclingRecord.value) : "-"));
+            vo2MaxCyclingValue.setText(latestCyclingRecord != null ? formatVO2MaxValue(latestCyclingRecord.value) : "-");
             lineDataSets.add(createDataSet(cyclingEntries, getResources().getColor(R.color.vo2max_cycling_char_line_color), getString(R.string.vo2max_cycling)));
         } else {
             VO2MaxRecord latestRecord = vo2MaxData.getLatestValue(Vo2MaxSample.Type.ANY);
             float vO2MaxValue = VO2MaxRanges.INSTANCE.calculateVO2MaxPercentile(latestRecord != null ? latestRecord.value : 0, age, activityUser.getGender());
             gaugeDrawer.drawSegmentedGauge(vo2MaxGauge, colors, segments, vO2MaxValue, false, true);
-            vo2MaxValue.setText(String.valueOf(latestRecord != null ? Math.round(latestRecord.value) : "-"));
+            vo2MaxValue.setText(latestRecord != null ? formatVO2MaxValue(latestRecord.value) : "-");
             lineDataSets.add(createDataSet(allEntries, getResources().getColor(R.color.vo2max_running_char_line_color), getString(R.string.menuitem_vo2_max)));
         }
         final LineData lineData = new LineData(lineDataSets);
@@ -248,12 +248,16 @@ public class VO2MaxFragment extends AbstractChartFragment<VO2MaxFragment.VO2MaxD
         lineDataSet.setValueFormatter(new ValueFormatter() {
             @Override
             public String getFormattedValue(float value) {
-                return String.format(Locale.ROOT, "%d", Math.round(value));
+                return formatVO2MaxValue(value);
             }
         });
         return lineDataSet;
     }
 
+    private static String formatVO2MaxValue(final float value) {
+        return String.format(Locale.getDefault(), "%.1f", value);
+    }
+
     @Override
     protected void renderCharts() {
         vo2MaxChart.invalidate();
@@ -332,4 +336,4 @@ public class VO2MaxFragment extends AbstractChartFragment<VO2MaxFragment.VO2MaxD
             return this.latestValues.get(type);
         }
     }
-}
+}

app/src/main/java/nodomain/freeyourgadget/gadgetbridge/activities/dashboard/AbstractDashboardVO2MaxWidget.java

@@ -11,6 +11,7 @@ import java.time.Instant;
 import java.time.LocalDate;
 import java.time.ZoneId;
 import java.util.List;
+import java.util.Locale;
 
 import nodomain.freeyourgadget.gadgetbridge.GBApplication;
 import nodomain.freeyourgadget.gadgetbridge.R;
@@ -90,7 +91,7 @@ public abstract class AbstractDashboardVO2MaxWidget extends AbstractGaugeWidget
         final ActivityUser activityUser = new ActivityUser();
         final int age = activityUser.getAgeAt(LocalDate.ofInstant(Instant.ofEpochSecond(dashboardData.timeTo), ZoneId.systemDefault()));
         float vo2MaxValue = VO2MaxRanges.INSTANCE.calculateVO2MaxPercentile(vo2MaxData.value != -1 ? vo2MaxData.value : 0, age, activityUser.getGender());
-        setText(String.valueOf(vo2MaxData.value != -1 ? Math.round(vo2MaxData.value) : "-"));
+        setText(vo2MaxData.value != -1 ? String.format(Locale.getDefault(), "%.1f", vo2MaxData.value) : "-");
         drawSegmentedGauge(
                 colors,
                 segments,