Fix for fragment null string comparison inside DefaultClusterRenderer Java

GmapClusterRendererFixedNullRef.java

public class GmapClusterRendererFixedNullRef extends DefaultClusterRenderer<GmapClusterItem>
{
	// ....
	
	@Override
	protected void onClusterItemUpdated(GmapClusterItem item, Marker marker)
	{
	  //super.onClusterItemUpdated(item, marker);

	  /// !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
	  //
	  //  //  Source / Credits: https://gist.github.com/CallumCarmicheal/6810e48b837020adfb7f32b27df212e6
	  //
	  // Replaced logic with a fix due to a bug where the marker .getTitle is null!
	  // This is the code from inside the com.google.maps.android.clustering.view.DefaultClusterRenderer class licensed under apache
	  //
	  // I REPEAT THIS IS NOT MY ORIGINAL WORK, THE COPYRIGHT HOLDER FOR THE FOLLOWING CODE IS GOOGLE 2013 LICENSED UNDER APACHE !!!!
	  //
	  //  ==== TERMS OF APACHE LICENSE ====
	  //
	  // Permissions:
	  // - Commercial use
	  // - Distribution
	  // - Modification
	  // - Patent use
	  // - Private use
	  //
	  // Conditions:
	  // - License and copyright notice
	  // - State changes
	  //
	  // Limitations:
	  // - Liability
	  // - Trademark use
	  // - Warranty
	  //
	  /// !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!

	  boolean changed = false;

	  // Update marker text if the item text changed - same logic as adding marker in CreateMarkerTask.perform()
	  if (item.getTitle() != null || item.getSnippet() != null)
	  {
		// FIX: FIX for issue where marker.getTitle is null
		if (marker.getTitle() == null || !marker.getTitle().equals(item.getTitle()))
		{
		  marker.setTitle(item.getTitle());
		  changed = true;
		}

		// FIX: FIX for issue where marker.getSnippet is null
		if (marker.getSnippet() == null || !marker.getSnippet().equals(item.getSnippet()))
		{
		  marker.setSnippet(item.getSnippet());
		  changed = true;
		}
	  }

	  else if (item.getSnippet() != null && !item.getSnippet().equals(marker.getTitle()))
	  {
		marker.setTitle(item.getSnippet());
		changed = true;
	  }

	  else if (item.getTitle() != null && !item.getTitle().equals(marker.getTitle()))
	  {
		marker.setTitle(item.getTitle());
		changed = true;
	  }

	  // Update marker position if the item changed position
	  if (!marker.getPosition().equals(item.getPosition()))
	  {
		marker.setPosition(item.getPosition());
		changed = true;
	  }

	  if (changed && marker.isInfoWindowShown())
	  {
		// Force a refresh of marker info window contents
		marker.showInfoWindow();
	  }
	}
	
	// ....
}