Solved! Go to Solution.
<s:Button id="fileBrowse" click="fileBrowse_clickHandler(event)" skinClass="widgets.Samples.GPXTrackPointReader.folderButtonSkin"/>
<s:Button id="fileBrowse" click="fileBrowse_clickHandler(event)" skinClass="widgets.Samples.GPXTrackPointReader.folderButtonSkin"/>
tedrick(June 14, 2011)
Updated with a sample GPX file. Note that the code looks for the xmlns definition to determine which version of gpx to use; if you don't have the xmlns defines, you will get the 'not valid gpx file' error.
Ronald,
The developer has to have a meta.xml that is setup for the widget in order for their widget to be supported by Application Builder. If you do not see a meta.xml in the zip file then it is not a widget that is supported.
Ronald,
Writing the meta.xml has nothing to do with Flash Builder. Here is the documentation on writing a meta.xml:
http://resources.arcgis.com/en/help/flex-viewer/concepts/01m3/01m30000004n000000.htm