Heartrate zones: adding preference for max heartrate.

Fixes #1118.

src/main/java/de/dennisguse/opentracks/data/models/HeartRateZones.java

@@ -0,0 +1,33 @@
+package de.dennisguse.opentracks.data.models;
+
+import androidx.annotation.NonNull;
+
+import de.dennisguse.opentracks.R;
+
+public class HeartRateZones {
+
+    private final HeartRate max;
+
+    public HeartRateZones(@NonNull HeartRate max) {
+        this.max = max;
+    }
+
+    public int getColorForZone(HeartRate current) {
+        if (current != null) {
+            if (current.getBPM() >= max.getBPM() * 0.9) {
+                return R.color.heart_rate_zone_textcolor_5;
+            }
+            if (current.getBPM() >= max.getBPM() * 0.8) {
+                return R.color.heart_rate_zone_textcolor_4;
+            }
+            if (current.getBPM() >= max.getBPM() * 0.7) {
+                return R.color.heart_rate_zone_textcolor_3;
+            }
+            if (current.getBPM() >= max.getBPM() * 0.6) {
+                return R.color.heart_rate_zone_textcolor_2;
+            }
+        }
+
+        return R.color.heart_rate_zone_textcolor_1;
+    }
+}

src/main/java/de/dennisguse/opentracks/settings/PreferencesUtils.java

@@ -42,6 +42,8 @@ import java.util.stream.Stream;
 import de.dennisguse.opentracks.R;
 import de.dennisguse.opentracks.data.models.Distance;
 import de.dennisguse.opentracks.data.models.DistanceFormatter;
+import de.dennisguse.opentracks.data.models.HeartRate;
+import de.dennisguse.opentracks.data.models.HeartRateZones;
 import de.dennisguse.opentracks.data.models.Speed;
 import de.dennisguse.opentracks.io.file.TrackFileFormat;
 import de.dennisguse.opentracks.io.file.TrackFilenameGenerator;
@@ -279,9 +281,10 @@ public class PreferencesUtils {
         return getBoolean(R.string.settings_sensor_bluetooth_service_filter_enabled_key, DEFAULT);
     }
 
-    public static int getMaxHeartrate() {
+    public static HeartRateZones getHeartRateZones() {
         final int DEFAULT = Integer.parseInt(resources.getString(R.string.settings_sensor_heart_rate_max_default));
-        return getInt(R.string.settings_sensor_heart_rate_max_key, DEFAULT);
+        int value = getInt(R.string.settings_sensor_heart_rate_max_key, DEFAULT);
+        return new HeartRateZones(HeartRate.of(value));
     }
 
     public static boolean shouldShowStatsOnLockscreen() {

src/main/java/de/dennisguse/opentracks/viewmodels/GenericStatisticsViewHolder.java

@@ -3,14 +3,18 @@ package de.dennisguse.opentracks.viewmodels;
 import android.util.Pair;
 import android.view.LayoutInflater;
 
+import androidx.core.content.ContextCompat;
+
 import de.dennisguse.opentracks.R;
 import de.dennisguse.opentracks.data.models.DistanceFormatter;
+import de.dennisguse.opentracks.data.models.HeartRateZones;
 import de.dennisguse.opentracks.data.models.Speed;
 import de.dennisguse.opentracks.data.models.SpeedFormatter;
 import de.dennisguse.opentracks.data.models.TrackPoint;
 import de.dennisguse.opentracks.databinding.StatsGenericItemBinding;
 import de.dennisguse.opentracks.sensors.sensorData.SensorDataSet;
 import de.dennisguse.opentracks.services.RecordingData;
+import de.dennisguse.opentracks.settings.PreferencesUtils;
 import de.dennisguse.opentracks.settings.UnitSystem;
 import de.dennisguse.opentracks.ui.customRecordingLayout.DataField;
 import de.dennisguse.opentracks.util.StringUtils;
@@ -269,10 +273,21 @@ public abstract class GenericStatisticsViewHolder extends StatisticViewHolder<St
                 valueAndUnit = StringUtils.getHeartRateParts(getContext(), null);
             }
 
+            //TODO Loads preference every time
+            HeartRateZones zones = PreferencesUtils.getHeartRateZones();
+            int textColor;
+            if (sensorDataSet != null) {
+                textColor = zones.getColorForZone(sensorDataSet.getHeartRate().first);
+            } else {
+                textColor = zones.getColorForZone(null);
+            }
+
             getBinding().statsValue.setText(valueAndUnit.first);
             getBinding().statsUnit.setText(valueAndUnit.second);
             getBinding().statsDescriptionMain.setText(R.string.stats_sensors_heart_rate);
             getBinding().statsDescriptionSecondary.setText(sensorName);
+
+            getBinding().statsValue.setTextColor(ContextCompat.getColor(getContext(), textColor));
         }
     }