Are you sure that you have write permission to /sdcard ( sdcard mounted with RW and the directory /sdcard i writable) ? I suggest you run another app to store some information in /sdcard for a test
On 4月2日, 下午12时23分, BJP <[email protected]> wrote: > Thanks Mark, but I'm debugging the application on a T-Mobile G1 with > installed SD card (real hardware) ~ no emulator, just the real thing. > Is there a permission needed that I'm not recognizing? Or, is there a > special exclusive way to deal with files on the SD card? Any help or > pointing in the right direction would be very helpful! > > Thanks, > Ben > > On Apr 1, 10:36 am, Mark Murphy <[email protected]> wrote: > > > > > BJP wrote: > > > I would like to write a file to the SD card from my application, but > > > the following code throws an IOException when debugged on a T-Mobile > > > G1: > > > > String p = Environment.getExternalStorageDirectory() + "/log.txt"; > > > File recfile = new File(p); > > > recfile.createNewFile(); > > > > The last line throws an IOException with detailMessage = "Cannot > > > create: /sdcard/log.txt". The MOUNT_UNMOUNT_FILESYSTEMS permission is > > > set in the manifest. And yes, I really do want to write to the SD > > > card; I don't want to use the logging features Android includes for > > > this particular application. The Android documentation does not seem > > > to give any specifics on how one might write files to removable > > > storage in "Data Storage" under "Framework Topics". What am I doing > > > wrong, or where can I read more about this topic? > > > If you are running this on the emulator, do you have an SD card image > > set up? The emulator does not have SD card storage by default -- you > > need to use mksdcard to create an image and then tell the emulator to > > use that image via a command-line switch at startup. > > > -- > > Mark Murphy (a Commons > > Guy)http://commonsware.com|http://twitter.com/commonsguy > > > Warescription: Three Android Books, Plus Updates, $35/Year --~--~---------~--~----~------------~-------~--~----~ You received this message because you are subscribed to the Google Groups "Android Developers" group. To post to this group, send email to [email protected] To unsubscribe from this group, send email to [email protected] For more options, visit this group at http://groups.google.com/group/android-developers?hl=en -~----------~----~----~----~------~----~------~--~---
