question: private void showSaveGpxTaskDialog ( ) { if ( mSaveGpxProgress == null ) { throw new IllegalArgumentException ( "Export progress dialog must not be null" ) ; } if ( mSaveGpxTaskFragment . isExecuting ( ) ) { mSaveGpxTaskFragment . restoreProgress ( mSaveGpxProgress ) ; if ( ! mSaveGpxProgress . isShowing ( ) ) { mSaveGpxProgress . show ( ) ; } } }
target:  Opens export gpx dialog, if any