srinivasn462 / sanselanandroid Goto Github PK

Android has an ExifInterface class, but it is buggy. This patch contains one 
that actually works most of the time. Wondering if we should merge it back into 
this project.

https://issues.apache.org/jira/browse/SANSELAN-51

just a note that it's already in 2.x firmware:
http://developer.android.com/reference/android/media/ExifInterface.html

for older devices your lib would still be useful but please provide a ".jar" 
and simple code of usage

What steps will reproduce the problem?

Trying to create a GPS exif element with certain constants will throw an 
exception.  These two constants in particular:

TiffOutputField altitudeOutField = 
TiffOutputField.create(TiffConstants.GPS_TAG_GPS_ALTITUDE, outputSet.byteOrder, 
altitude);

TiffOutputField altitudeRefField = 
TiffOutputField.create(TiffConstants.GPS_TAG_GPS_ALTITUDE_REF, 
outputSet.byteOrder, 
GPSTagConstants.GPS_TAG_GPS_ALTITUDE_REF_VALUE_ABOVE_SEA_LEVEL);

Looking in GPSTagConstants.java, it shows these two TagInfo classes are created 
with a length of -1.  The exception generation happens because of this:

TiffOutputField.java:

public static TiffOutputField create(TagInfo tagInfo, int byteOrder,
            Number number) throws ImageWriteException
    {
        if (tagInfo.dataTypes == null || tagInfo.dataTypes.length < 1)
            throw new ImageWriteException("Tag has no default data type.");
        FieldType fieldType = tagInfo.dataTypes[0];

        if (tagInfo.length != 1)
            throw new ImageWriteException("Tag does not expect a single value.");

        byte bytes[] = fieldType.writeData(number, byteOrder);

        return new TiffOutputField(tagInfo.tag, tagInfo, fieldType, 1, bytes);
    }

Since length == -1, the exception is thrown.



What is the expected output? What do you see instead?
Expected output is that this Exif element can be created and added to the 
directory.

What version of the product are you using? On what operating system?
Latest source from subversion.  Android 2.2 on HTC EVO, as well as Android 
2.2.1 on Nexus One.

Please provide any additional information below.
I'm not sure what the -1 corresponds to, or what the length field is.  I could 
try changing the GPSTagConstants.java definition, but I'm not sure of what 
effects this may cause.

Sorry, seems to be elementary question...
But i'm really confused in using this project?
how can I use it in eclipse?
is it a jar labrary? or sth else?  

Hi guys, dont know to post this to where now?
Im stuck with this problem too long.

Does this library support PNG file and support to change PPI of image on 
android?

Thanks you for reading.

Exactly the same issue descried in here:

https://issues.apache.org/jira/browse/SANSELAN-21

The problem is that interoperatibility index has the same field id as gps
latitude, but in different directories.

I'm attaching a patch which worked for me. It includes also the patch for
JpegImageMetadata merged from the patch for SANSELAN-21, although it wasn't
necessary in my case.

Any guide?
Any wiki?

What can it do and what can't it do?

Can it, for example, allow to copy Exif from one file to another (useful when 
resizing images, for example) ?

What steps will reproduce the problem?
1. Call one of the ExifRewriter.updateExifMetadataXXXX methods to update 
the EXIF of a large image (e.g. one with 6MBytes of image data).

What is the expected output? What do you see instead?
Updating the EXIF should happen without out-of-memory errors thrown by 
Android or even emergency soft-reference clean-up by Android.

Please use labels and text to provide additional information.
OutOfMemory, Large Image