For delays/timers: use Duration.

src/main/java/de/dennisguse/opentracks/TrackController.java

@@ -31,7 +31,6 @@ import de.dennisguse.opentracks.services.TrackRecordingService;
 import de.dennisguse.opentracks.services.TrackRecordingServiceConnection;
 import de.dennisguse.opentracks.util.ActivityUtils;
 import de.dennisguse.opentracks.util.StringUtils;
-import de.dennisguse.opentracks.util.UnitConversions;
 
 /**
  * Track controller for record, pause, resume, and stop.
@@ -42,6 +41,8 @@ public class TrackController implements View.OnTouchListener {
 
     private static final String TAG = TrackController.class.getSimpleName();
 
+    private static final Duration UI_UPDATE_INTERVAL = Duration.ofSeconds(1);
+
     private final Activity activity;
     private final TrackRecordingServiceConnection trackRecordingServiceConnection;
     private final Handler handlerUpdateTotalTime = new Handler();
@@ -66,7 +67,7 @@ public class TrackController implements View.OnTouchListener {
             if (isResumed && isRecording && !isRecordingPaused) {
                 updateTotalTime();
                 setTotalTime();
-                handlerUpdateTotalTime.postDelayed(this, UnitConversions.ONE_SECOND_MS);
+                handlerUpdateTotalTime.postDelayed(this, UI_UPDATE_INTERVAL.toMillis());
             }
         }
     };
@@ -180,7 +181,7 @@ public class TrackController implements View.OnTouchListener {
         }
 
         if (isRecording && !isRecordingPaused) {
-            handlerUpdateTotalTime.postDelayed(updateTotalTimeRunnable, UnitConversions.ONE_SECOND_MS);
+            handlerUpdateTotalTime.postDelayed(updateTotalTimeRunnable, UI_UPDATE_INTERVAL.toMillis());
         }
 
         viewBinding.trackControllerRecord.setImageResource(isRecording && !isRecordingPaused ? R.drawable.ic_button_pause : R.drawable.button_record);

src/main/java/de/dennisguse/opentracks/fragments/MarkerDetailFragment.java

@@ -34,6 +34,8 @@ import androidx.annotation.NonNull;
 import androidx.fragment.app.Fragment;
 import androidx.fragment.app.FragmentActivity;
 
+import java.time.Duration;
+
 import de.dennisguse.opentracks.MarkerEditActivity;
 import de.dennisguse.opentracks.R;
 import de.dennisguse.opentracks.content.data.Marker;
@@ -43,7 +45,6 @@ import de.dennisguse.opentracks.util.IntentUtils;
 import de.dennisguse.opentracks.util.ListItemUtils;
 import de.dennisguse.opentracks.util.MarkerUtils;
 import de.dennisguse.opentracks.util.StringUtils;
-import de.dennisguse.opentracks.util.UnitConversions;
 
 /**
  * A fragment to show marker details.
@@ -55,7 +56,7 @@ public class MarkerDetailFragment extends Fragment {
     private static final String TAG = MarkerDetailFragment.class.getSimpleName();
     private static final String KEY_MARKER_ID = "markerId";
 
-    private static final long HIDE_TEXT_DELAY = 4 * UnitConversions.ONE_SECOND_MS;
+    private static final Duration HIDE_TEXT_DELAY = Duration.ofSeconds(4);
 
     private MenuItem shareMarkerImageMenuItem;
 
@@ -126,7 +127,7 @@ public class MarkerDetailFragment extends Fragment {
             viewBinding.markerDetailMarkerTextGradient.setVisibility(visibility);
             viewBinding.markerDetailMarkerInfo.setVisibility(visibility);
             if (visibility == View.VISIBLE) {
-                handler.postDelayed(hideText, HIDE_TEXT_DELAY);
+                handler.postDelayed(hideText, HIDE_TEXT_DELAY.toMillis());
             }
         });
         return viewBinding.getRoot();
@@ -236,7 +237,7 @@ public class MarkerDetailFragment extends Fragment {
         if (hasPhoto) {
             handler.removeCallbacks(hideText);
             viewBinding.markerDetailMarkerPhoto.setImageURI(marker.getPhotoURI());
-            handler.postDelayed(hideText, HIDE_TEXT_DELAY);
+            handler.postDelayed(hideText, HIDE_TEXT_DELAY.toMillis());
         } else {
             viewBinding.markerDetailMarkerPhoto.setImageResource(MarkerUtils.ICON_ID);
         }

src/main/java/de/dennisguse/opentracks/fragments/StatisticsRecordingFragment.java

@@ -37,7 +37,6 @@ import de.dennisguse.opentracks.services.TrackRecordingServiceConnection;
 import de.dennisguse.opentracks.util.PreferencesUtils;
 import de.dennisguse.opentracks.util.StringUtils;
 import de.dennisguse.opentracks.util.TrackIconUtils;
-import de.dennisguse.opentracks.util.UnitConversions;
 import de.dennisguse.opentracks.viewmodels.SensorDataModel;
 
 /**
@@ -50,7 +49,7 @@ public class StatisticsRecordingFragment extends Fragment implements TrackDataLi
 
     private static final String TAG = StatisticsRecordingFragment.class.getSimpleName();
 
-    private static final long UI_UPDATE_INTERVAL = UnitConversions.ONE_SECOND_MS;
+    private static final Duration UI_UPDATE_INTERVAL = Duration.ofSeconds(1);
 
     public static Fragment newInstance() {
         return new StatisticsRecordingFragment();
@@ -121,7 +120,7 @@ public class StatisticsRecordingFragment extends Fragment implements TrackDataLi
                     updateSensorDataUI();
                 }
 
-                handlerUpdateUI.postDelayed(this, UI_UPDATE_INTERVAL);
+                handlerUpdateUI.postDelayed(this, UI_UPDATE_INTERVAL.toMillis());
             }
         }
     };

src/main/java/de/dennisguse/opentracks/services/sensors/AltitudeSumManager.java

@@ -10,8 +10,9 @@ import android.util.Log;
 import androidx.annotation.Nullable;
 import androidx.annotation.VisibleForTesting;
 
+import java.time.Duration;
+
 import de.dennisguse.opentracks.util.PressureSensorUtils;
-import de.dennisguse.opentracks.util.UnitConversions;
 
 /**
  * Estimates the altitude gain and altitude loss using the device's pressure sensor (i.e., barometer).
@@ -20,7 +21,7 @@ public class AltitudeSumManager implements SensorEventListener {
 
     private static final String TAG = AltitudeSumManager.class.getSimpleName();
 
-    private static final int SAMPLING_RATE = 3 * (int) UnitConversions.ONE_SECOND_US;
+    private static final Duration SAMPLING_RATE = Duration.ofSeconds(3);
 
     private boolean isConnected = false;
 
@@ -39,7 +40,7 @@ public class AltitudeSumManager implements SensorEventListener {
             Log.w(TAG, "No pressure sensor available.");
             isConnected = false;
         } else {
-            isConnected = sensorManager.registerListener(this, pressureSensor, SAMPLING_RATE);
+            isConnected = sensorManager.registerListener(this, pressureSensor, (int) SAMPLING_RATE.toNanos());
         }
 
         lastAcceptedPressureValue_hPa = Float.NaN;