App Inventor Extensions

Exif Extension

See the App Inventor Extensions document about how to use an App Inventor Extension.

For questions about this extension or bug reports please start a new thread in the App Inventor community. Thank you.

For feature requests please contact me by email. To be a sponsor of a new method already is possible starting from only 10 USD! With your contribution you will help the complete App Inventor community. Thank you.

March 14th, 2019: Initial version

Description

This extension enables you to for read and write Exif tags in a JPEG file or a RAW image file.
Supported formats are: JPEG, DNG, CR2, NEF, NRW, ARW, RW2, ORF, PEF, SRW, RAF and HEIF.
Thank you Andrew for being the sponsor of this extension!

Required permissions: none

Note: It is not possible to get or set values of image files in the assets of the app.

Note: With each new version the Android operation system gets more and more restricted. In Android 10 seems to be not possible anymore to get the GPS information from a picture.

Methods

Get all possible tags, see also the Android documentation.

Returns the value of the specified tag or empty string if there is no such tag in the image file.

Returns the double value of the specified tag. In case there is no value available, the default value will be returned.

Returns the integer value of the specified tag. In case there is no value available, the default value will be returned.

Set the value under the given tag. This method is only supported for JPEG files.

Example App: Exif Test

Note: the image picker copies the picked image into directory /Pictures/_app_inventor_image_picker. All modifications of exif values in the example app will be done on the copy of the image. To modify an exif value of the original image, you have to use the direct path to the image.

Screenshots:

Test the functionality of the Exif extension

The test app is available in Google Play. You can test the example following these steps

1. Follow the opt-in URL to get access to the app and to be able to download it to your device. It might take a few hours for Google to enable you as beta tester!
2. Start testing.

Buy the Exif extension for App Inventor

You can buy this extension (aix file).
With your payment you accept the terms and conditions below.

Payment options

After having received your payment I will be happy to send the download link to you. Please let me know your Google account! I usually will send the download link not later than 24 hours after having received your payment.
Thank you! Taifun

Terms and Conditions

• You are buying a digital product and agree to the No Return, No Refund Policy.
• You have tested the example app successfully on your device before buying the extension.
• You can use the extension in as many projects as you like and pass the generated apk files to as much end users as you like, also of course you can publish your apk files to Google Play and other services
• This is a single user license for you as App Inventor developer, which means, the extension (aix file) is only for you to use. You are not allowed to pass a paid extension (aix file) or a project (aia file) which contains a paid extension to someone else, to post it in one of the communities or to distribute it to others. In case you are interested in a multiple user license, please contact me by email.
• There are a lot of different Android devices available in the market. I'm not able to test the example on all these devices and therefore also can not guarantee, that the example is running on your device.
• THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.

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