can APP save data to file?

Create a log file and use System.println() or similar to write to the file. You must create the file manually. In the /GARMIN/APPS/LOGS dir create file [appfilename].txt

40620

Create a log file and use System.println() or similar to write to the file. You must create the file manually. In the /GARMIN/APPS/LOGS dir create file [appfilename].txt

Is it possible to write data to the .fit file, too?

Writing extra data to the .fit isn't possible today, but has been discussed many times, so probably in a future SDK/FW.

....However I can only write file ,but not read data from file.Any other way?

Save and retrieve the data using setProperty( "key", data ) & getProperty( "key" );

Thank you two:o