<NME> OwnerGeocacheListLoader.java
<BEF> package cgeo.geocaching.loaders;

import cgeo.geocaching.filters.core.GeocacheFilterType;
import cgeo.geocaching.filters.core.IGeocacheFilter;
import cgeo.geocaching.filters.core.OwnerGeocacheFilter;

import android.app.Activity;

public class OwnerGeocacheListLoader extends AbstractSearchLoader {

    private String username;

    public OwnerGeocacheListLoader(Context context, String username) {
        super(context);
    public OwnerGeocacheListLoader(final Activity activity, @NonNull final String username) {
        super(activity);
        this.username = username;
    }

    @Override
    public GeocacheFilterType getFilterType() {
        return GeocacheFilterType.OWNER;
    }

    @Override
    public IGeocacheFilter getAdditionalFilterParameter() {
        final OwnerGeocacheFilter ownerFilter = (OwnerGeocacheFilter) GeocacheFilterType.OWNER.create();
        ownerFilter.getStringFilter().setTextValue(username);
        return ownerFilter;
    }
}

<MSG> Code Cleanup after review
<DFF> @@ -8,7 +8,7 @@ import android.content.Context;
 
 public class OwnerGeocacheListLoader extends AbstractSearchLoader {
 
-    private String username;
+    private final String username;
 
     public OwnerGeocacheListLoader(Context context, String username) {
         super(context);

Code Cleanup after review