Problems viewing NEF-Images form a D7100

[GoogleCodeExporter]

What steps will reproduce the problem?
1. Connect to Camera
2. go to gallary
3. switch to camera
4. push the arrow up-down button
   You now see thumbnails of all NEF-Files of the camaras SD-Card
5. Now hold down the "download button" until it changes his colour
6. double tab on one of the NEF thumbnails

What is the expected output?
The Imae viewer should open and display the NEF-Image.

What do you see instead?
In many cases the thumbnail is lost and a green android symbol is shown 
instead. If you look with a file-explorer in the "Save location" there is now a 
file 0 bytes long with the name of the NEF-image you have touched.
I think this happens for all NEF-Images which are not made while the current 
dashboard session.

What version of the product are you using? On what operating system?
0.30.27
Acer Iconia Tab with Android 4.1.1
Nikon D7100 (Firmware 1.01) connected with USB cable

Please provide any additional information below.
The image-viewer is RawDroid 1.6.4 which is much faster and zooming works much 
better like with the internal viewer. But the above problem occurs also with 
the internal viewer.

Original issue reported on code.google.com by svenimta...@gmail.com on 23 Aug 2013 at 1:51

[GoogleCodeExporter]

I also have a D7100 and have no problem with downloading and viewing NEF or JPG 
images.

>>6. double tab on one of the NEF thumbnails << not double tab but single touch 
the image you want to download and display.

Original comment by hub...@gmail.com on 23 Aug 2013 at 6:01

[GoogleCodeExporter]

strange, what is wrong with my configuration?

Sorry, don´t work with my tablet, allways strange effects like disapeared 
thumnails (then you see only the android symbol) and file with size 0 bytes in 
the "DSLR" folder or the app crashes.

I tried 0.30.27_3 and it shows the same behaviour.
This time I used only the internal viewer.

Do you have any idea, what I can test to isolate this problem.

Original comment by svenimta...@gmail.com on 23 Aug 2013 at 6:58

[GoogleCodeExporter]

Is the progress moving at all in the progress dialog?

Original comment by hub...@gmail.com on 23 Aug 2013 at 8:10

[GoogleCodeExporter]

No in my case the progress dialog "downloading image for display" pops up, but 
the progress bar don't move. After some time the progress dialog closes and the 
image is shown. Then, if I exit the viewer the thumbnail of the picture is 
replaced with the green android symbol.

But I think I found the following correlation:
Images you have captured with dashboard are working well. There you see the 
progress bar moving while downloading. It's exactly like you write above.

But if you do the following it dosn't work for me.
1.) disconnect the camera from you tablet
2.) exit the dashboard app if it is open
3.) reconnect the camera with you tablet
4.) open the dashboard app, if it will not open automatically
5.) go in to the gallery
6.) touch on the camera symbol, then you see a blank image area and 4 new 
button symbols: "SD 1", "SD 2", "||" (download image infos), "|" (download mode)
7.) now touch the "||" symbol, then a progress dialog "downloadin image infos 
from camera" pops up. After this you see for every image of cameras SDCARD a 
thumbnail in the current image area.
8.) hold down the download symbol until it changes his colour
9.) now touch on a thumbnail of an image from your cameras SDCARD which was not 
captured with dashboard.
10.) the progress dialog "downloading image for display" opens, but the 
progress bar don't move. 
11.) After some time the progress dialog closes and the image is shown.
12.) Then, if I exit the viewer, the thumbnail of the image replaced with the 
green android symbol. Also you will find in the DSLR folder of your tablet a 
new file with a file size of 0.

I hope you can reproduce this behaviour now.

Original comment by svenimta...@gmail.com on 25 Aug 2013 at 12:01

[GoogleCodeExporter]

I just checked this and working.
Check in the settings the 'save location' under 'Image transfer'.
Where does it point?

Original comment by hub...@gmail.com on 25 Aug 2013 at 12:10

[GoogleCodeExporter]

/storage/sdcard0/DCIM/DSLR

I will try it with the Galaxy S3 of my sun.
Perhaps it works with this device.

Original comment by svenimta...@gmail.com on 25 Aug 2013 at 1:15

[GoogleCodeExporter]

Do you have that folder? I tested with Nexus7 running stock Android, SG2 
running CM9.1 and with D7100, D5000 and Canon 650D and in all combinations it 
is working.
It will only fail if the application can't write to the folder specified in the 
settings.

Original comment by hub...@gmail.com on 25 Aug 2013 at 1:17

[GoogleCodeExporter]

I tried it with a Galaxy S2 with Android 4.1.2 and it works.
So it depends on the hardware or the Android version.
Unfortunately it doesn't work with my 

Acer Iconia Tab A700 with Android 4.1.1.

Perhaps I try a firmware update for Iconia Tab, but there exists no official 
update, only a CM version exists which requires root.

Original comment by svenimta...@gmail.com on 25 Aug 2013 at 3:38

[GoogleCodeExporter]

Did you check if the folder exists and is writable? Check with ES File Explorer 
your DCIM folder on tablet and set the 'save location' in settings according it.

Original comment by hub...@gmail.com on 25 Aug 2013 at 3:40

[GoogleCodeExporter]

Yes, folder exists and is writable and this must be true, because if I try a 
capture with dslrdashboard the app writes in the same folder without any 
problems.

Original comment by svenimta...@gmail.com on 25 Aug 2013 at 4:00

[GoogleCodeExporter]

Same code does download the image when you capture to Android device and when 
you download image for viewing in image viewer

Original comment by hub...@gmail.com on 25 Aug 2013 at 4:03

[GoogleCodeExporter]

Sorry, I don't know the cause, but currently the error is gone and all is 
working on my Acer Tab. :-(
Since half an hour I tried to reproduce this error again, but no succes.
I have no idea what has changed now.
If I know the reason, I let you know.

Perhaps it was a problem of the OTG-USB adapter and an USB mode change between 
SDCard-reader-mode and Camera-mode.

Original comment by svenimta...@gmail.com on 25 Aug 2013 at 5:12

[GoogleCodeExporter]

>Same code does download the image when you capture to Android device and when 
you download image for viewing in image viewer

Strange! Currently I think your code has nothing to do with this behaviour.

I noticed that if the camera battery level is very low this could trigger this 
issue.
But I have to test more to verify this suspicion.

Original comment by svenimta...@gmail.com on 25 Aug 2013 at 7:39

[GoogleCodeExporter]

Yes, if the camera battery is low, the camera may end the USB communication.

Original comment by hub...@gmail.com on 25 Aug 2013 at 7:41