Android: Getting all existing exif data from an image

Question

I know it's possible to get specific exif data by specifying the string tag in the ExifInterface. For example, getting the date of an image would be something like:

ExifInterface exif = new ExifInterface(pathToImage);
exif.getAttribute(ExifInterface.TAG_DATETIME);

Is there a way to simply get all of the non-null available exif strings without having to manually write the get code for each of them?

Answer 1

you can make an array of all tags that you wish to query, and put the non-null results of the query into a collection (maybe hashmap) or something else (maybe JsonObject).

Example in Kotlin:

    val pathToImage = "..."
    val exif = ExifInterface(pathToImage)
    val tagsToCheck = arrayOf(
        ExifInterface.TAG_DATETIME,
        ExifInterface.TAG_GPS_LATITUDE,
        ExifInterface.TAG_GPS_LONGITUDE,
        ExifInterface.TAG_EXPOSURE_TIME
    )
    val hashMap = HashMap<String, String>()
    for (tag in tagsToCheck)
        exif.getAttribute(tag)?.let { hashMap[tag] = it }