private void importGpx(final List<Uri> uris) {
        final GPXImporter importer = new GPXImporter(this, listId, importGpxAttachementFinishedHandler);
        for (Uri uri : uris) {
            importer.importGPX(uri, null, ContentStorage.get().getName(uri));
        }
    }
Extract a cache from adapter data.

@param adapterInfo an adapterInfo
@return the pointed cache
main/src/main/java/cgeo/geocaching/CacheListActivity.java