1 files changed, 8 insertions, 2 deletions
diff --git a/platform/android/MapboxGLAndroidSDK/src/main/java/com/mapbox/mapboxsdk/location/LocationComponentCompassEngine.java b/platform/android/MapboxGLAndroidSDK/src/main/java/com/mapbox/mapboxsdk/location/LocationComponentCompassEngine.java
index b53d909de3..b47f8d7afb 100644
--- a/platform/android/MapboxGLAndroidSDK/src/main/java/com/mapbox/mapboxsdk/location/LocationComponentCompassEngine.java
+++ b/platform/android/MapboxGLAndroidSDK/src/main/java/com/mapbox/mapboxsdk/location/LocationComponentCompassEngine.java
@@ -31,6 +31,7 @@ class LocationComponentCompassEngine implements CompassEngine, SensorEventListen
   private static final float ALPHA = 0.45f;
 
   private final WindowManager windowManager;
+  @NonNull
   private final SensorManager sensorManager;
   private final List<CompassListener> compassListeners = new ArrayList<>();
 
@@ -42,14 +43,18 @@ class LocationComponentCompassEngine implements CompassEngine, SensorEventListen
   @Nullable
   private Sensor magneticFieldSensor;
 
+  @NonNull
   private float[] truncatedRotationVectorValue = new float[4];
+  @NonNull
   private float[] rotationMatrix = new float[9];
   private float[] rotationVectorValue;
   private float lastHeading;
   private int lastAccuracySensorStatus;
 
   private long compassUpdateNextTimestamp;
+  @Nullable
   private float[] gravityValues = new float[3];
+  @Nullable
   private float[] magneticValues = new float[3];
 
   /**
@@ -109,7 +114,7 @@ class LocationComponentCompassEngine implements CompassEngine, SensorEventListen
   }
 
   @Override
-  public void onSensorChanged(SensorEvent event) {
+  public void onSensorChanged(@NonNull SensorEvent event) {
     // check when the last time the compass was updated, return if too soon.
     long currentTime = SystemClock.elapsedRealtime();
     if (currentTime < compassUpdateNextTimestamp) {
@@ -233,7 +238,8 @@ class LocationComponentCompassEngine implements CompassEngine, SensorEventListen
    * @param smoothedValues array of float, that contains previous state
    * @return float filtered array of float
    */
-  private float[] lowPassFilter(float[] newValues, float[] smoothedValues) {
+  @Nullable
+  private float[] lowPassFilter(@NonNull float[] newValues, @Nullable float[] smoothedValues) {
     if (smoothedValues == null) {
       return newValues;
     }