EXIF tag access using new Tasker-Action "Java function" -- Syntax problems??!

[ithaka ner]

Hello Tasker-Community,

since I've read the Tasker's 4.6 changelog, I was eager to use the new Java Function in my projects.

Recently I needed an option to access the EXIF tags of jpg images, first try with JS was to complicated due to

file access and same-origin-issues.

So I decided to replicate the Java way by using the ExifInterface class (see Android Developers). This might be

also very interesting for other users, so I will publish a solution when working/ready upon request.

When I understood everything right, the actions below should text-flash the used ISO value (AD):

Java Exif Img

A1: Variable Set [ Name:%imgpath To:/sdcard/exifTest.jpg ]

A2: Java Function [ Return:(ExifInterface) ei Class Or Object:ExifInterface Function:new {ExifInterface} (String) Param:%imgpath

A3: Java Function [ Return:%exifvalue Class Or Object:ei Function:getAttribute {String} (String) Param:TAG_ISO]

A4: Flash [ Text:%exifvalue Long:On ]

Comments:

A1: define the targeted image as variable, I want to loop trough a directory later when it's working ;-)

A2: load the class "ExifInterface" and pass the absolute path as (String) and define all that as "ei" (=object??!)

A3: run "getAttribute" on "ei" with "TAG_ISO" as (String)-parameter and return the result as Tasker-Var: %exifvalue ({String}-variable)

A4: output of the result

But so far it's not working - I appreciate any help. Since I' always keen to lean new stuff, I'm also 

happy if someone can point me towards the stumble.

PS.: Due to the fact that I'm not so familiar with Java programming - another question for the Java||Tasker experts:

Is there a simple option to return a selection or all exif-tags, best as JSON either direct or saved to storage?

The later use of the EXIF-data would be in a WebView with JS for readout and processing.

[David Wang]

Use "ISOSpeedRatings" instead of "TAG_ISO". (In fact, "ISOSpeedRatings" is the value of "TAG_ISO".) 'Cause Tasker just couldn't get the value only from its name at present. 

Of course, you can also get the value of "TAG_ISO" programmmatically using the "reflection" feature of JAVA. See the example here for reference.

My xml file for "access exif tag in Java" also attached.

[Wietse van Buitenen]

This is great!

Thanks for posting this!

Now I discovered that I have some pictures without lat lon while they should have it..

I can use this to list and correct if needed :)

[ithaka ner]

Splendid David! Your example is working perfectly, I understood where my mistake was :)

I'll try now to dig through this mentioned JAVA "reflection" feature and expand the whole thing it to my needs...

Thanks a lot for this heading!

[Jim Davidson]

Hello to all;

This is an older discussion but I'm hoping for some guidance. I'm moderately familiar with Tasker and have been trying to create a series of tasks that will read the EXIF info for a given jpeg file and return the make and model of the camera used in my photos.

I have followed the examples to the letter and I keep returning an empty %result variable. I have confirmed that EXIF info is in the image via online and PC-based EXIF reader programs.

I've tried the TAG_ISO, ISOSpeedRatings options as well to no avail.

I'm assuming that I use the MODEL or MAKE tags in the Param(String) but because I get no results from the other information (ISOSpeedRatings), I'm not certain if I'm doing something wrong.

I have a Galaxy Note4 running 5.1.1, Tasker 4.7u3m.

Thanks for any assistance anyone can provide.