How do you add Location information in the image EXIF using CameraX API. I created my own app using https://codelabs.developers.google.com/codelabs/camerax-getting-started/#4.
I sifted through https://developer.android.com/training/camerax and https://developer.android.com/jetpack/androidx/releases/exifinterface but did not found any guides.
If you took a picture you override onImageSaved. There you can write the exif data to your photo. I only have it in Java, but the princip is the same.
ExifInterface exif = null; try { exif = new ExifInterface(PhotoPath); } catch (IOException e) { e.printStackTrace(); } exif.setAttribute(ExifInterface.TAG_GPS_LATITUDE, "location"); The different TAGs you can look up here. How to get the location is here and if you need more information about how to store the location in exif look here.
You can set the location with the Metadata.setLocation method
val metadata = Metadata().apply { location = Location() // set the location here } val contentValues = ContentValues().apply { put(MediaStore.MediaColumns.DISPLAY_NAME, System.currentTimeMillis()) put(MediaStore.MediaColumns.MIME_TYPE, "image/jpeg") put(MediaStore.MediaColumns.RELATIVE_PATH, Environment.DIRECTORY_DCIM) } val contentUri = MediaStore.Images.Media.getContentUri(MediaStore.VOLUME_EXTERNAL_PRIMARY) val outputOptions = OutputFileOptions.Builder(contentResolver, contentUri, contentValues) .setMetadata(metadata) .build() imageCapture.takePicture(outputOptions, mainExecutor, object : OnImageSavedCallback { override fun onImageSaved(outputFileResults: OutputFileResults) { Log.d(TAG, "Photo URI ${outputFileResults.savedUri}") } override fun onError(exception: ImageCaptureException) { Log.e(TAG, "Error", exception) } }) Here is the answer I would have like to find : When using CameraX, EXIF data is automatically set but not GPS EXIF tags because :
Here is the function that I call inside the onImageSaved() callback :
fun setCurrentLocationInExif(context: Context, uri : Uri, fusedLocationClient : FusedLocationProviderClient){ // check location permissions if (ActivityCompat.checkSelfPermission(context, Manifest.permission.ACCESS_FINE_LOCATION) != PackageManager.PERMISSION_GRANTED && ActivityCompat.checkSelfPermission(context, Manifest.permission.ACCESS_COARSE_LOCATION) != PackageManager.PERMISSION_GRANTED ) { throw(Exception("no location found")) } else { // get location (a new one if older than 60s) val locRequest = CurrentLocationRequest.Builder().setMaxUpdateAgeMillis(60000).build() fusedLocationClient.getCurrentLocation(locRequest, null) .addOnSuccessListener { location: Location? -> // Got last known location. In some rare situations this can be null. In that case we do not go further if (location != null){ Log.d(TAG, "latitude=${location.latitude}") Log.d(TAG, "longitude=${location.longitude}") val uriFd = context.contentResolver.openFileDescriptor(uri, "rw") if (uriFd != null) { val uriExif = ExifInterface(uriFd.fileDescriptor) uriExif.setGpsInfo(location) uriExif.saveAttributes() uriFd.close() } else{ throw(Exception("Cannot find file for uri=$uri")) } } } } } The call in onImageSaved :
override fun onImageSaved(output: ImageCapture.OutputFileResults){ setCurrentLocationInExif(requireContext(), output.savedUri!!, fusedLocationClient) } Where fusedLocationClient is defined in my Main Activity onCreate after a lateinit (you will need to activate Play Services/location services in your gradle.build(app) :
fusedLocationClient = LocationServices.getFusedLocationProviderClient(this) 