native_exif

A simple EXIF metadata reader/writer for Flutter using native functions from iOS and Android.

Usage

First create a EXIF reader instance by reading out an image path:

final exif = await Exif.fromPath(pickedFile!.path);

Reading attributes

Now you can run either pre-defined functions or get all attributes:

final originalDate = await exif.getOriginalDate();
final attributes = await exif.getAttributes();

Writing attributes

await exif.writeAttribute("key", "value");
await exif.writeAttributes({"key1": "value1", "key2": "value2"});

Close the exif interface

await exif.close();

Platform notes

This plugin does only work on iOS and Android. Other platforms are not yet supported.

Android

Only specific EXIF and GPS attributes are supported. Please look at android/src/main/kotlin/com/cloudacy/native_exif/NativeExifPlugin.kt for a list of supported attributes.

All raw attribute values must be of type String.

Values for GPSLatitude and GPSLongitude can be written as negative values but will be returned as positive values. Use GPSLatitudeRef and GPSLongitudeRef or getLatLong() to determine the correct coordinates.

iOS

Only specific EXIF and GPS attributes are supported. Please look at EXIF dictionary keys and GPS dictionary keys for supported attributes.

Please note that all GPS dictionary keys need to be prefixed with GPS. For example: kCGImagePropertyGPSLatitude == "Latitude", which equals to "GPSLatitude" in native_exif.

Values for GPSLatitude and GPSLongitude should be of type String and can be written as negative values but will be returned as positive values. Use GPSLatitudeRef and GPSLongitudeRef or getLatLong() to determine the correct coordinates.

API Docs

For code docs, you can use the automatically generated reference on pub.dev.

Example

For a better usage example, see the example folder or use the example page on pub.dev.

Libraries

native_exif