[android] - rework MarkerView update mechanism (#7581)

platform/android/MapboxGLAndroidSDK/src/main/java/com/mapbox/mapboxsdk/annotations/MarkerViewManager.java

@@ -70,10 +70,20 @@ public class MarkerViewManager implements MapView.OnMapChangedListener {
     }
   }
 
+  /**
+   * Called to enable or disable MarkerView management.
+   *
+   * @param enabled true if management should be enabled
+   */
   public void setEnabled(boolean enabled) {
     this.enabled = enabled;
   }
 
+  /**
+   * Called with true to wait for the next render invocation.
+   *
+   * @param waitingForRenderInvoke true if waiting for next render event
+   */
   public void setWaitingForRenderInvoke(boolean waitingForRenderInvoke) {
     isWaitingForRenderInvoke = waitingForRenderInvoke;
   }
@@ -155,7 +165,7 @@ public class MarkerViewManager implements MapView.OnMapChangedListener {
    * {@link MarkerView} will be animated to visible using alpha animation.
    * </p>
    */
-  public void update() {
+  public void updateMarkerViewsPosition() {
     for (final MarkerView marker : markerViewMap.keySet()) {
       final View convertView = markerViewMap.get(marker);
       if (convertView != null) {
@@ -421,10 +431,11 @@ public class MarkerViewManager implements MapView.OnMapChangedListener {
    * once each 250 ms.
    * </p>
    */
-  public void scheduleViewMarkerInvalidation() {
+  public void update() {
     if (enabled) {
       long currentTime = SystemClock.elapsedRealtime();
       if (currentTime < updateTime) {
+        updateMarkerViewsPosition();
         return;
       }
       invalidateViewMarkersInVisibleRegion();
@@ -509,7 +520,7 @@ public class MarkerViewManager implements MapView.OnMapChangedListener {
 
     // trigger update to make newly added ViewMarker visible,
     // these would only be updated when the map is moved.
-    update();
+    updateMarkerViewsPosition();
   }
 
   /**

platform/android/MapboxGLAndroidSDK/src/main/java/com/mapbox/mapboxsdk/maps/AnnotationManager.java

@@ -66,7 +66,7 @@ class AnnotationManager {
   }
 
   void update() {
-    markerViewManager.scheduleViewMarkerInvalidation();
+    markerViewManager.update();
     infoWindowManager.update();
   }
 
@@ -226,6 +226,7 @@ class AnnotationManager {
     if (onMarkerViewAddedListener != null) {
       markerViewManager.addOnMarkerViewAddedListener(marker, onMarkerViewAddedListener);
     }
+    markerViewManager.setEnabled(true);
     markerViewManager.setWaitingForRenderInvoke(true);
     return marker;
   }
@@ -248,7 +249,8 @@ class AnnotationManager {
       annotations.put(id, marker);
       markers.add(marker);
     }
-    markerViewManager.invalidateViewMarkersInVisibleRegion();
+    markerViewManager.setEnabled(true);
+    markerViewManager.update();
     return markers;
   }