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From Simon MacDonald <>
Subject Re: Changes to requesting a PERSISTENT file system in Cordova-Android
Date Wed, 22 Feb 2012 19:50:25 GMT
I agree with your points but I'm worried that we are making a change for
current PhoneGap Android developers. They are assuming their data is on the
/sdcard and now we are moving the location of their root filesystem. That
means they'll need to write code to move any files from the /sdcard to the
internal storage directory as they update their app from PhoneGap 1.4.1 to
Apache Cordova 1.5.0. Alternatively, we could put a check into Cordova to
do this work for them.

IIRC the internal storage directory is protected via the UNIX filesystem
permissions so if I wanted to store a image/audio/video file and call an
intent to view/play the file it wouldn't work.

Also, with the temporary storage on
/sdcard/Android/data/<package_name>/cache/ it will be cleaned up when the
user uninstalls the application.

Anyway, I'm not adverse to making the move I just want to make sure we
think through all the ramifications of the change.

Simon Mac Donald

On Wed, Feb 22, 2012 at 1:09 PM, Filip Maj <> wrote:
> Joe and I had a discussion about this as I was getting cordova-js shimmed
> into the Android implementation. The /sdcard location is not persistent on
> Android - you can take the SD card out at any time.
> We ended up using internal storage as the way to go -
> /data/data/<package>/ as the persistent storage (can't get wiped) and
> /data/data/<package>/cache as the temporary storage. The ../cache path can
> be cleared out by going into Settings -> Applications -> Your App -> Clear
> Data.
> In hindsight I really should have posted about this switch on the mailing
> list - my apologies for that.
> I guess it's as good a time as any to discuss the switch and where each of
> TEMPORARY and PERSISTENT locations should go to?
> On 12-02-22 9:40 AM, "Simon MacDonald" <> wrote:
> >Hey,
> >
> >I've been reading up on all the code changes as it seems like everything
> >is
> >different after four days without internet. One of the things that I
> >noticed is that the command:
> >
> >    window.requestFileSystem(LocalFileSystem.PERSISTENT, 0, onSuccess,
> >onError);
> >
> >Now returns the path "/data/data/{app package name}". In the previous
> >release it returned "/sdcard" or whatever the path of the mounted
> >storage is. So I was just wondering what the rational behind the change
> >was
> >and are we worried that everyone who's written an Android app
> >using window.requestFileSystem() will suddenly find their root path has
> >changed?
> >
> >Simon Mac Donald
> >

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