Re: [android-developers] Re: Problem computing the free space on the external card - only with a single installation

2010-08-18 Thread Julius Spencer 
Hi,

I have this same issue; my check evaluates available space as negative in rare 
cases. I'm not sure yet whether I can take an absolute value. 

This must be a problem which has happened before. Anyone else come across this?

Regards,
Julius.


On 16/08/2010, at 7:52 AM, Bob Kerns wrote:

 Two possibilities come to mind.
 
 First, perhaps the Dell Streak is one of the phones that has more than
 one set of SD storage, and mounts the true external one on a
 subirectory under getExternalStorageDirectory().
 
 But the more likely possibility is that the phone has the problem that
 this reviewer observed, with the storage sometimes not being seen:
 
 http://ptech.allthingsd.com/20100811/dells-streak-a-tiny-tablet-that-takes-calls-too/
 
 That would seem to fit the symptoms better -- sometimes it working,
 sometimes not.
 
 On Aug 15, 12:59 am, Fabrizio Giudici fabrizio.giud...@tidalwave.it
 wrote:
 -BEGIN PGP SIGNED MESSAGE-
 Hash: SHA1
 
 Hello.
 
 My application allow to download files and store them on the external
 card. To avoid filling it, I've implemented a safety check so it
 prevents downloading when the free space is less than 20MB. The
 computation of the free space is done by:
 
 public synchronized long getFreeSpace()
   {
 if (statFs == null)
   {
 statFs = new
 StatFs(getExternalStorageDirectory().getAbsolutePath());
   }
 
 return statFs.getAvailableBlocks() * statFs.getBlockSize();
   }
 
 which I presume is correct. In fact, it works in all my tests and for
 what I can say for the 99% of users. But a single user notified me
 that my app is constantly giving the card full message, as if the
 above method didn't work. He also told me that the problem went away
 after a while, and returned after upgrading a new release of my app.
 The user seems an advanced one, and I think he's able to check and
 correctly manage the contents of his external card. He reported that
 the card has more than 1.4GB free on the card. Are you aware of any
 specific issue or bug? The smartphone of the user is a Dell Streak
 with Android 1.6. Thanks.
 
 - --
 Fabrizio Giudici - Java Architect, Project Manager
 Tidalwave s.a.s. - We make Java work. Everywhere.
 java.net/blog/fabriziogiudici -www.tidalwave.it/people
 fabrizio.giud...@tidalwave.it
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Re: [android-developers] Re: Problem computing the free space on the external card - only with a single installation

2010-08-18 Thread Kostya Vasilyev 
The code above multiplies two ints and casts them to long. If the
intermediate result is over 2Gb, you'll get a negative number.

Try multiplying long values instead:

long byteCount = blockSize * (long) avlBlocks;

--
Kostya Vasilyev -- http://kmansoft.wordpress.com

19.08.2010 0:09 пользователь Julius Spencer jul...@msa.co.nz написал:

Hi,

I have this same issue; my check evaluates available space as negative in
rare cases. I'm not sure yet whether I can take an absolute value.

This must be a problem which has happened before. Anyone else come across
this?

Regards,
Julius.



On 16/08/2010, at 7:52 AM, Bob Kerns wrote:

 Two possibilities come to mind.

 First, perhaps...

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Re: [android-developers] Re: Problem computing the free space on the external card - only with a single installation

2010-08-18 Thread Fabrizio Giudici 

-BEGIN PGP SIGNED MESSAGE-
Hash: SHA1

On 8/18/10 22:37 , Kostya Vasilyev wrote:

 The code above multiplies two ints and casts them to long. If the
 intermediate result is over 2Gb, you'll get a negative number.

 Try multiplying long values instead:

 long byteCount = blockSize * (long) avlBlocks;


A they are ints Hell. I think it can be definitely that.
It is not reproduced on my Droid because it has 5.5Gb free that are
reported as 1.5Gb. Indeed, it will report a negative number when the
free space is between 2Gb and 4Gb, 6Gb and 8Gb, 10Gb and 12Gb, 14Gb
and 18Gb etc... And my user has got 14Gb.

- -- 
Fabrizio Giudici - Java Architect, Project Manager
Tidalwave s.a.s. - We make Java work. Everywhere.
java.net/blog/fabriziogiudici - www.tidalwave.it/people
fabrizio.giud...@tidalwave.it
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Re: [android-developers] Re: Problem computing the free space on the external card - only with a single installation

2010-08-18 Thread Julius Spencer 
Oops! Thank you Kostya!



On 19/08/2010, at 8:37 AM, Kostya Vasilyev wrote:

 The code above multiplies two ints and casts them to long. If the 
 intermediate result is over 2Gb, you'll get a negative number.
 
 Try multiplying long values instead:
 
 long byteCount = blockSize * (long) avlBlocks;
 
 --
 Kostya Vasilyev -- http://kmansoft.wordpress.com
 
 
 19.08.2010 0:09 пользователь Julius Spencer jul...@msa.co.nz написал:
 
 Hi,
 
 I have this same issue; my check evaluates available space as negative in 
 rare cases. I'm not sure yet whether I can take an absolute value.
 
 This must be a problem which has happened before. Anyone else come across 
 this?
 
 Regards,
 Julius.
 
 
 On 16/08/2010, at 7:52 AM, Bob Kerns wrote:
 
  Two possibilities come to mind.
  
  First, perhaps...
 
 
 
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[android-developers] Re: Problem computing the free space on the external card - only with a single installation

2010-08-15 Thread Bob Kerns 
Two possibilities come to mind.

First, perhaps the Dell Streak is one of the phones that has more than
one set of SD storage, and mounts the true external one on a
subirectory under getExternalStorageDirectory().

But the more likely possibility is that the phone has the problem that
this reviewer observed, with the storage sometimes not being seen:

http://ptech.allthingsd.com/20100811/dells-streak-a-tiny-tablet-that-takes-calls-too/

That would seem to fit the symptoms better -- sometimes it working,
sometimes not.

On Aug 15, 12:59 am, Fabrizio Giudici fabrizio.giud...@tidalwave.it
wrote:
 -BEGIN PGP SIGNED MESSAGE-
 Hash: SHA1

 Hello.

 My application allow to download files and store them on the external
 card. To avoid filling it, I've implemented a safety check so it
 prevents downloading when the free space is less than 20MB. The
 computation of the free space is done by:

     public synchronized long getFreeSpace()
       {
         if (statFs == null)
           {
             statFs = new
 StatFs(getExternalStorageDirectory().getAbsolutePath());
           }

         return statFs.getAvailableBlocks() * statFs.getBlockSize();
       }

 which I presume is correct. In fact, it works in all my tests and for
 what I can say for the 99% of users. But a single user notified me
 that my app is constantly giving the card full message, as if the
 above method didn't work. He also told me that the problem went away
 after a while, and returned after upgrading a new release of my app.
 The user seems an advanced one, and I think he's able to check and
 correctly manage the contents of his external card. He reported that
 the card has more than 1.4GB free on the card. Are you aware of any
 specific issue or bug? The smartphone of the user is a Dell Streak
 with Android 1.6. Thanks.

 - --
 Fabrizio Giudici - Java Architect, Project Manager
 Tidalwave s.a.s. - We make Java work. Everywhere.
 java.net/blog/fabriziogiudici -www.tidalwave.it/people
 fabrizio.giud...@tidalwave.it
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 =dZLt
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